阀门分自动阀门与驱动阀门。自动阀门（如安全阀、减压阀、蒸汽疏水阀、止回阀）是靠装置或管道本身的介质压力的变化达到启闭目的的。驱动阀门（闸阀、截止阀、球阀、蝶阀等）是靠驱动装置（手动、电动、液动、气动等）驱动控制装置或管道中介质的压力、流量和方向。由于介质的压力、温度、流量和物理化学性质的不同，对装置和管道系统的控制要求和使用要求也不同，所以阀门的种类规格非常多。剧不完全统计，我国的阀门产品品种已达四千多个型号，近四万个规格，阀门在经济生活中起着非常大的作用。

There are self-driven valves and operated valves. self-driven valves( like safety valve, relief valve, steam trap, check valve ) are functioning by utilizing its mechanical design or the pressure, direction of its flow medium.operated valve( like gate valve, globe valve, ball valve, butterfly valve ) is fuctioning by actuator( manual, electric, hydraulic, pneumatic etc. ) or the pressure , flow direction of its medium. due to the differences of pressure, temperature, flow, and physical-chemical character of its medium , there are different requirements in designing and applying the pipeline system.therefore there are numerous types of valve.according to an unofficial statistics, there are more than four thousand types of valve with approximately forty thousand specifications in China. Obviously, valve is an important element in the social economy.

电磁阀[SOLENOID VALVE]
电磁阀是用来控制流体的自动化基础元件，属于执行器；并不限于液压，气动。电磁阀用于控制液压流动方向，工厂的机械装置一般都由液压钢控制，所以就会用到电磁阀。而通常意义上，国内电磁阀厂家也并不以液压电磁阀为主打，一般多生产二位二通气液用电磁阀。

Solenoid valve is a basic component in automatic flow control, it is actuator but not limited to hydraulic, pneumatic. solenoid valve is mainly used to control the direction of hydraulic flow, machines in plant are usually controled by hydraulic cylinder and thus the solenoid valve is applyed. generally , solenoid valve manufacturers in China not only produce hydraulic solenoid valve, they mainly manufacturer hydraulic-pneumatic combined two way solenoid valve.

电磁阀的工作原理，电磁阀里有密闭的腔，在的不同位置开有通孔，每个孔都通向不同的油管，腔中间是阀，两面是两块电磁铁，哪面的磁铁线圈通电阀体就会被吸引到哪边，通过控制阀体的移动来档住或漏出不同的排油的孔，而进油孔是常开的，液压油就会进入不同的排油管，然后通过油的压力来推动油刚的活塞，活塞又带动活塞杆，活塞竿带动机械装置动。这样通过控制电磁铁的电流就控制了机械运动。

The main working theory of solenoid valve is that there is a fully closed cabinet inside the solenoid valve,with holes in different position. each hole is connected with different hose.the valve is centered with two electric magnets aside, when the power is on, the valve will be pulled to that side.though the movement of the valve, the hole which is connected to the hose will be closed / open, the oil inlet is always open, the hydraulic oil flows to different hoses and push the cylinder piston by its pressure.the piston drives the piston stem and then the equipment into movement. by this means, the mechanical movement can be controled by controling the electricity of solenoid valve.

球阀[BALL VALVE]
球阀和旋塞阀是同属一个类型的阀门，只有它的关闭件是个球体，球体绕阀体中心线作旋转来达到开启、关闭的一种阀门。

Ball valve and plug valve is the same type of valves only its closure of a spheroid, spheroid around a rotary axis lines to achieve valve body opened and closed a valve

球阀在管路中主要用来做切断、分配和改变介质的流动方向。球阀是近年来被广泛采用的一种新型阀门，它具有以下优点：1． 球阀流体阻力小，其阻力系数与同长度的管段相等。2． 球阀结构简单、体积小、重量轻。3． 球阀紧密可靠，目前球阀的密封面材料广泛使用塑料、密封性好，在真空系统中也已广泛使用。4． 球阀操作方便，开闭迅速，从全开到全关只要旋转90°，便于远距离的控制。5． 球阀维修方便，球阀结构简单，密封圈一般都是活动的，拆卸更换都比较方便。6． 球阀在全开或全闭时，球体和阀座的密封面与介质隔离，介质通过时，不会引起阀门密封面的侵蚀。7． 球阀适用范围广，通径从小到几毫米，大到几米，从高真空至高压力都可应用。

Ball valve used to be cut off in the main line, distribution and change the direction of the flow medium. Ball valve is widely used in recent years a new type of valves, it has the following advantages : 1. Ball valve fluid resistance small, and its resistance coefficient with the length of the barrel of equivalent. 2. Ball valve structure simple, small size, light weight. 3. Ball valve closely reliable, current Ball valve sealed surface material widely used plastic, undergo good in a vacuum system also has been widely used. 4. Ball valve easy to operate, the closing rapidly, from open all around, as long as there 90E, facilitate remote control. 5. Ball valve maintenance convenience Ball valve structure simple. seal ring generally activities, the removal of the replacement is more convenient. 6. Ball valve whole or in the open all closed, spheroid and the sealed surface with medium valve seat separation medium through, will not cause the valves sealed surface erosion. 7. Ball valve application scope Link Drive from small to several millimetres, a few meters in from the high pressure can be high vacuum applications.

蝶阀[BUTTERFLY VALVE]
蝶阀是用随阀杆转动的圆形蝶板作启闭件,以实现启闭动作的阀门.蝶阀主要用截断阀使用,亦可设计成具有调节或截断兼调节的功能.目前蝶阀在低压大中口径管道上的使用越来越多

Butterfly valve is on/off by the turning of the stem which operate the round butterfly disc. It is mainly used as cut-off valve and also can be designed as regulating or cut-off / regulating combined valve. currently , butterfly is mainly used in the low pressure large size pipelines.

蝶阀的蝶板安装于管道的直径方向。在蝶阀阀体圆柱形通道内，圆盘形蝶板绕着轴线旋转，旋转角度为0°~90°之间，旋转到90°时，阀门则牌全开状态。

butterfly valve panels installed at the Tip of the diameter pipeline direction. In butterfly valve body flight corridors, the disc-shaped Tip boards around rotary axis, rotation angle for 0° -90 meridian east between rotary to +90, the valves are open all licence conditions.

蝶阀结构简单、体积小、重量轻，只由少数几个零件组成。而且只需旋转90°即可快速启闭，操作简单，同时该阀门具有良好的流体控制特性。蝶阀处于完全开启位置时，蝶板厚度是介质流经阀体时唯一的阻力，因此通过该阀门所产生的压力降很小，故具有较好的流量控制特性。蝶阀有弹密封和金属的密封两种密封型式。弹性密封阀门，密封圈可以镶嵌在阀体上或附在蝶板周边。

butterfly valve structure simple, small size, light weight, only by a few parts. But it can be rapidly open and close-90E, simple to operate, while the fluid control valves have good character. butterfly valve a fully open position, Tip board thickness is only when the medium flows through body resistance, the pressure generated by the air valves small, it has a better flow control characteristics. butterfly valve a metal shells sealed and the two sealed sealed patterns. Flexible sealed valves, seal ring can embed in body or peripheral boards to Tip.

截止阀[GLOBE VALVE]
截止阀是一种常用的截断阀,主要用来接通或截断管路中的介质,一般不用于调节流量．截止阀适用压力、温度范围很大,但一般用于中、小口径的管道．

globe valve as one of the cut-off valve is a common valves mainly used to connect or disconnect the line of medium, generally not for regulating flows. globe valves apply pressure, high temperature range, but are generally used for medium and small-calibre pipeline

截止阀的主要标准 GB12233-89《通用阀门 铁制截止阀与升降式止回阀》 GB12235-89《通用阀门 法兰连接钢制截止阀与升降式止回阀》 JB/T53174-94《截止阀 产品质量分等》 JB/T53165-92《高压平衡截止阀 产品质量分等》 GB/T587-93《船用法兰青铜截止阀》 GB/T590-93《船用法兰铸铁截止阀》 GB8464-87《内螺纹连接闸阀、截止阀、球阀、止回阀 通用技术条件》 GB8465.2-87《内螺纹连接闸阀、截止阀、球阀、止回阀 基本尺寸 铁制截止阀》

The valves of the main criteria GB12233-89< a valve closing valves with metal-style check valve "GB12235-89< a valve flange steel closing valves connected with the elevation of check valve " JB/T53174-94< closing valves product quality grading "JB/T53165-92< closing valves - balanced product quality grading" GB/T587-93< bunker flange closing valves bronze "cast iron flange GB/T590-93< bunker closing valves" GB8464-87< of thread connecting valve, The valves, ball valve, chekc valve overall technical conditions "GB8465.2-87< of thread connecting valve, closing valves, ball valve, check valve basic size metal closing valves"

控制阀[CONTROL VALVE]
控制阀又称调节阀，是执行器的主要类型，通过接受调节控制单元输出的控制信号，借助动力操作去改变流体流量。控制阀一般由执行机构和阀门组成。如果按其所配执行机构使用的动力，控制阀可以分为气动、电动、液动三种，即以压缩空气为动力源的气动调节阀，以电为动力源的电动控制阀，以液体介质(如油等)压力为动力的电液动控制阀，另外，按其功能和特性分，还有电磁阀、电子式、智能式、现场总线型控制阀等。

Control valves regulating valves as is the implementation of the main types of vehicles, by accepting conditioning control module export control signals from engine operation to change fluid flow. Control valves and valve general, the executing agency. If by their ticket enforcement agencies use the power, control valves can be divided into pneumatic, electrical, fluid movement three, namely to compressed air to power sources pneumatic - valve to call for the engine electric control valves for the liquid medium (such as oil) pressure-driven electricity fluid moving control valves, and their functions and characteristics hours are electromagnetic valves, electronic style, smart, Floor bus-control valves.

控制阀的阀体类型选择
控制阀的阀体种类很多，常用的有直通单座、直通双座、角形、隔膜、小流量、三通、偏心旋转、蝶形、套筒式、球形等。在具体选择时，可做如下考虑：(1)阀芯形状结构，主要根据所选择的流量特性和不平衡力等因素考虑。(2)耐磨损性，当流体介质是含有高浓度磨损性颗粒的悬浮液时，阀的内部材料要坚硬。(3)耐腐蚀，由于介质具有腐蚀性，尽量选择结构简单阀门。(4)介质的温度、压力，当介质的温度、压力高且变化大时，应选用阀芯和阀座的材料受温度、压力变化小的阀门。(5) 防止闪蒸和空化，闪蒸和空化只产生在液体介质。在实际生产过程中，闪蒸和空化会形成振动和噪声，缩短阀门的使用寿命，因此在选择控制阀时应防止阀门产生闪蒸和空化。

valve body types of control valves choice valve body many types of control devices, commonly used by direct-Block, through engine, angle type, divide, and small flows, the three links, eccentricity rotary, butterfly type, sleeve style, spherical. In specific choices, do the following considerations : (1) disc shape of the structure, mainly based on the choice of flow characteristics and consider factors such as power imbalances. (2) The presence of worn when fluid medium is the wear and tear of high concentrations of suspended particulate fluids, valves materials to the internal hard. (3) corrosion resistance, as a corrosive medium, to choose structure simple valves. (4) medium temperature, pressure, when the medium temperature, high pressure and great change, and should be chosen disc valve seat materials by temperature, pressure changes small valves. (5) prevent instant steam and air-based, space-based instant steam and only in a liquid medium. In the actual production process, Shanzheng and will form a vibration of air and noise, shorten the useful life of valves, control valves in the choice should have instant steam and air-based prevention valves.

换向阀[CHANGE VALVE]
换向阀主要包括电磁换向阀，手动换向阀，电液换向阀，四通换向阀，多路换向阀，气控换向阀，五联多路换向阀，二位二通换向阀等。

direction change valve include electromagnetic direction change valve, manual direction change valve, call liquid direction change valve, four way direction change valve, multiplexed direction change valve, gas control direction change valve, five of multiplexed direction change valve, two spaces, such as two-direction change valve

手动换向阀是用手动杠杆操纵阀芯移位的方向控制阀。在液压系统中，它可控制油流方向，以改变执行元件的运动方向。 手动换向阀的滑阀换向定位方式有钢球定位式和弹簧复位式二种结构。钢球定位式是当操纵手柄外力取消后，阀芯依靠钢球定位保持在换向位置。弹簧复位式是当操纵手柄外力取消后，弹簧使阀芯自动回复到初始位置。电磁换向阀是通过电气信号来改变液流方向的控制阀门，它可用来实现液压系统的卸载，顺序动作及油路换向。电磁换向阀主要用于工程机械、矿山机械、起重运输机械以及其它机械的液压系统中。

Manual is a manual lever manipulation direction change valve disc killer direction control valves. In the hydraulic system, it can control the oil flow direction, the implementation of components of the Movement to change direction. Manual direction change valve the slide-valve for a way to the positioning of spaces steel ball positioning-and-two types of spring-loaded structure. steel ball positioning of manipulation handle external forces when lifting, positioning steel ball disc rely on to maintain in-place. When the manipulation of spaces is a spring-loaded handle external forces cancellation, disc spring-loaded to automatically revert to the initial position. direction change valve electromagnetic signals through electrical control valves to change the direction of liquid flow, it can be used to achieve hydraulic unloading system, the order to move and change oil flow. Electromagnetic direction change valve mainly for engineering machinery, mining machinery, transport machinery and other mechanical lifting hydraulic system

单向阀[SINGLE CHECK VALVE]
单向阀又称止回阀或逆止阀。用于液压系统中防止油流反向流动。

Check valves or as a one-way valve. For the hydraulic system to prevent reverse flow of oil flow.

单向阀有直通式和直角式两种。直通式单向阀用螺纹连接安装在管路上。直角式单向阀有螺纹连接、板式连接和法兰连接三种形式。液控单向阀也称闭锁阀或保压阀，它与单向阀相同，用以防止油液反向流动。但在液压回路中需要油流反向流动时又可利用控制油压，打开单向阀，使油流在两个方向都可流动。液控单向阀采用锥形阀芯，因此密封性能好。在要求封闭油路时，可用此阀作为油路的单向锁紧而起保压作用。液控单向阀控制油的泄漏方式有内泄式和外泄式二种。在油流反向出口无背压的油路中可用内泄式；否则需用外泄式，以降低控制油压力。

A straight-through one-way valves and rectangular Type two. Straight-through one-way valves installed in a connecting thread of the pipeline. Rectangular style is a one-way valve connecting thread, flange type connectivity and connecting three forms. Fluid control valves also known as one-way pressure valve closed valves or insurance, with the same one-way valves to prevent reverse flow of oil. However, the need for oil flow in hydraulic circuit reverse flows can use hydraulic control, opening a one-way valve, so that the flow of oil can flow in both directions. Fluid control one-way valve used cone disc, sealed a good performance. oil flow closed in demand, the availability of one-way valves as oil flow park sky Paul pressure. Fluid leakage control one-way valves control the manner of oil and oil-leaking Type II species. No reverse flow of oil exports in the oil flow available within inflow Type; Otherwise required outflow type, the control of oil in order to reduce pressure.

电动阀[ELECTRIC MOTOR CONTROL VALVE]
电动阀是以电动机作为启闭阀门的动力，用于比较大型的阀门，高级的电动阀，可以用于工艺上的流量控制。

Electric valves open and close valves on the electric motors as a driving force for the larger valves, electric valves, the processes can be used to control the flow.

电动阀具备装配容易、故障率低以及符合业界自动化需求的优点，是业者较划算的选择。因为使用一般传统气动阀，免不了要有配管、电磁阀及压缩机等才能匹配，而电动阀是以马达驱动，安装简易省事，且电动阀安装配合工厂原有的自控线路即可，可节省其他成本支出。此外，以马达驱动方式开闭较平顺，无瞬间冲力过大的缺点，故障率可大幅降低,不少人都认为电动阀贵，使用成本高，其实不然，如果以整体计算，传统阀要加上许多配件及管路安装，价格并未占优势，反而要承担较多的保养费.所以电动阀的前景是比较广阔的。

Electric valves fitted with easy, low failure rate in the industry and the advantages of automation needs is more economical choice operators. Because of the use of general traditional pneumatic valves, inevitably a ticket pipes, and electromagnetic valves, compressors can match, and electrical devices are motor-driven, easy to install, and the installation of electrical devices with the original robotic factory line will be able to reduce other costs. In addition to motor-driven approach to turn more smoothly, without an excessive momentum shortcomings, failures can be substantially reduced rate, many people believe that your electric valves, the use of high cost, but in fact it is not, if a holistic basis, and many accessories to traditional valves and the installation of pipelines, the price is not dominant, Instead, they will assume more maintenance. Therefore, the prospects for electrical devices are relatively broad.

疏水阀[STEAM TRAP VALVE]
疏水阀在蒸汽加热系统中起到阻汽排水作用，选择合适的疏水阀，可使蒸汽加热设备达到最高工作效率。要想达到最理想的效果，就要对各种类型疏水阀的工作性能、特点进行全面的了解。疏水阀的品种很多，各有不同的性能。选用疏水阀时，首先应选其特性能满足蒸汽加热设备的最佳运行，然后才考虑其他客观条件，这样选择你所需要的疏水阀才是正确和有效的。

steam traps steam heating system in a waste gas drainage role in the selection of suitable steam traps allow steam heating equipment for the highest efficiency. To achieve optimal results, it is necessary for all types steam traps work performance and characteristics of a comprehensive understanding. steam traps many varieties, each with different performance. steam traps choice, should first elect their identity can best meet the steam heating equipment operation before considering other objective conditions, such choices you need steam traps is correct and effective.

疏水阀要能“识别”蒸汽和凝结水，才能起到阻汽排水作用。“识别” 蒸汽和凝结水基于三个原理：密度差、温度差和相变。于是就根据三个原理制造出三种类型的疏水阀：分类为机械型、热静力型、热动力型。1.在生产工艺的换热设备，烘干室，快速热交换器，蒸馏设备等需要快速升温，不允许存有凝结水的生产加热设备，应该选用机械型疏水阀。2.在蒸汽管道，伴热管线、小型加热设备，采暖设备，温度要求不高的用汽设备，应该选用热静力型疏水阀。3.在高温高压过热蒸汽管线和设备上，应该选用过热蒸汽专用疏水阀。

steam traps to be "identified" steam and condensed water can play a role in blocking air drainage. "identification" and the condensed steam water based on three principles : the poor density, and temperature difference of change. So on the basis of three principles of creating three types of steam traps : classified as mechanical type, thermal static type, thermal power-based. 1. In the heat production equipment, drying room, rapid heat exchangers, distillation equipment needs rapid warming, not a condensed water heating equipment production should be chosen mechanical type steam traps. 2. In steam pipes, coupled heat pipelines, small heating equipment, heating equipment, air temperatures do not ask for the use of equipment, it should be the choice of hot static type steam traps. 3. Overheating in high-temperature high-pressure steam pipelines and equipment, should choose an exclusive steam traps steam.

比例阀[PROPORTIONAL VALVE]
比例阀是一种输出量与输入信号成比例的液压阀。它可以按给定的输入电信号连续地按比例地控制液流的压力、流量和方向。比例阀可以按设定的比例同时抽取几种溶液进行混合的阀门。液相色谱中的低压梯度洗脱装置就是在高压泵之前加上一个比例阀，在常压下将几种溶剂按设定的比例在线混合之后，再泵入色谱体系。

Proportional valves is a signal proportional to import and export volume of the hydraulic valves. It can be given for the importation of electrical signal proportional to the control Yeliu pressure, flow and direction. Proportional valve can be set at the same time the proportion of the valves from several solution mixed. The liquid phase is coupled device is the low voltage gradient itself in a high-pressure pumps add ratio valves in the atmosphere will be set according to the proportion of online several solvents mixed, then pump into the gas system.

比例阀能实现自动控制、远程控制和程序控制。比例阀能把电的快速灵活等优点与液压传动功率大等特点结合起来。比例阀能连续地、按比例地控制执行元件的力、速度和方向，并能防止压力或速度变化及换向时的冲击现象简化了系统，减少了元件的使用量。比例阀制造简便，价格比伺服阀低廉，但比普通液压阀高。由于在输入信号与比例阀之间需设置直流比例放大器，相应增加了投资费用。比例阀使用条件、保养和维护与普通液压阀相同，抗污染性能好。比例阀具有优良的静态性能和适当的动态性能，动态性能虽比伺服阀低，但已经可以满足一般工业控制的要求。比例阀效率比伺服阀高。主要用于开环系统，也可组成闭环系统.

Proportional valves to achieve automatic control, remote control and programmed control. Proportional valves can call the rapid and flexible, and other advantages such as large hydraulic power transmission characteristics together. Proportional valves to continuous, proportional to the implementation of components of the control, speed and direction, pressure and can prevent or to the exchange rate changes and the impact of the phenomenon of simplified systems to reduce the usage of components. Proportional valves manufacture simple, low prices than servo valves, hydraulic valves than ordinary high. Because of signal proportional valves with the ratio between the need to install DC amplifier, a corresponding increase in investment costs. Proportional valves conditions of use, maintenance and preservation of hydraulic valves with the same ordinary, extraordinary good performance. Proportional valves excellent static performance and appropriate dynamic performance, dynamic performance is low compared with servo valves, but had to meet general industrial control requirements. Proportional valves than servo valves high efficiency. For the main part of the system can be integral loop system.

隔膜阀[DIAPHRAGM VALVE]
隔膜阀是一种特殊形式的截断阀，其启闭件是一块用软质材料制成的隔膜，它将阀体内腔与阀盖内腔隔开。隔膜阀实际上不过是“钳夹”的阀，一个弹性的，可扰的膜片，用螺椿连接在压缩件上，压缩件是由阀杆所操作而上下移动，当压缩件上升，膜片就高举，而造成通路，当压缩件下降，膜片就压在阀体堰上（假使为堰式阀）或压在轮廓的底部（假使为直通式），隔膜阀适用于开关及节流之用。

diaphragm valve is a special form of cut-off valves, which open and close this is a piece of soft quality materials produced by the divide, it separate the inside body and inlet inside the cover. diaphragm valve is really only "jaw" valves, a flexible, three of diaphragm by Lo underground link in compressed pieces, the compression of which is operated by stem next movement when compressed pieces rise diaphragm on hold, resulting in access, when compressed pieces falling, diaphragm pressure on the weir in valve body (even for the weir-type valves) or pressure at the bottom contours (even for straight-through processing), diaphragm valve applicable to switches and reducing use.

隔膜阀本身结构设计的原因特适合于超纯介质或污染严重，十分粘稠的液体、气体、腐蚀性或惰性介质。与控制设备相结合时，隔膜阀更能取代其它传统控制系统，尤其是适用于固体和易污染的惰性介质。产品主要应用于生物制药、食品、行业; 以及电力、化工、电镀、等行业的工业水处理中, 还被应用于半导体晶圆的生产中,隔膜阀是特别适用于运送有腐蚀性，有粘性的流体，例如泥浆、食品、药品、织维性粘合液等，因管线中，隔膜阀的操作机构，是不暴露在运送流体中，故不具污染性，也不需要填料，阀杆填料部也不可能会泄漏。

diaphragm valve own special reasons for the structural design suitable for super pure medium or severe pollution very ropy liquids, gases, corrosive or inert medium. Combined with control equipment, diaphragm valve replace other more traditional control systems, especially vulnerable pollution applicable to solid inert medium. Biological products are mainly used in the pharmaceutical, food, industry; And the power, chemical, electroplating, and industrial water treatment industries, was also applied to the semiconductor wafer production, diaphragm valve particularly applicable to the delivery of a corrosive, became the fluid, such as mud, food, medicines, woven together liquid-dimensional, because pipelines, diaphragm valve operating agencies, it is not exposed to the delivery of fluid, So no polluting, and do not need to fill, the Department can not fill stem will leak.

气阀[GAS VALVE]
从气阀工作原理来看，气阀工作性能将直接影响压缩机气缸的工作，因此，对气阀有如下要求：阻力损失小。气阀阻力损失大小与气流的阀隙速度及弹簧力大小有关。气速越高，能量损失越大；弹簧力过大，阻力损失也大，其大小按气阀运动规律的合理性准则设计确定。气阀关闭及时、迅速，关闭时不漏气，以提高机器的效率，延长使用期。寿命长、工作可靠。限制气阀寿命的主要因素是阀片及弹簧质量，一般对长期连续运转的压缩机，希望寿命达8000小时以上；对移动式、短期或间歇运转的压缩机，要求可稍低些。

From the air valve operating principles of view, air valve performance will directly affect the work of compressor tanks, air valve for the following requirements : resistance losses small. Air valve size and airflow resistance losses of valves always speed and the size of the spring-loaded edge. Gas higher speed, the greater the energy losses; Spring-loaded edge too large, the loss is great resistance, the size of the air valve movement design guidelines to determine the reasonableness of the law. Air valve closed timely, rapid, not leak closed to improve the efficiency of machines and extended use period. Long life, work reliable. Life is the main factor restricting air valve and spring-loaded valves quality, the general long-term continuous operation of the compressors to life 80 hours; For mobile, short-term or intermittent operation of compressors, may require slightly more.

气阀是往复活塞式压缩机中的重要部件，也是易损坏的部件之一。它的好坏直接影响压缩机的排气量、功率消耗及运转的可靠性，目前压缩机正向高速方向发展，而限制转速提高的关键问题之一就是气阀。活塞式压缩机一般都采用“自动阀”，就是气阀的开启与关闭是依靠阀片两边的压力差实现的，没有其它的驱动机构。

Air valve and piston-type compressors are to the important components is one of the components easily damaged. It will have a direct impact on the displacement compressors, power consumption and reliability of operation, the current compressor is fast direction, and rotational speed limit is one of the key issues in improving air valve. Piston-type compressors typically use the "automatic valve" that the air valve is opened and closed valves on the pressure on both sides to achieve poor, and there is no other drive.

膨胀阀[EXPANSION VALVE]
膨胀阀在系统中所起的作用是１：节流雾化液态制冷剂２：根据原设计系统过冷度和制冷工况准确控制流入蒸发器的制冷剂的流量．３：停机时快速平衡系统高低压力．所有的膨胀阀在设计与某车相配套时基本都要考虑到在膨胀阀失控条件下对压缩机的伤害程度评价

The role of expansion valves in the system is 1: cut usually liquid coolant 2 : Under the original design extremely cold and refrigeration systems for the situation accurately control the flow evaporator Coolant flow. 3 : parking, rapid balance system or pressure. All valves in the design and expansion of facilities, a machine must take into account the expansion of the basic conditions for the compressor valves control the degree of injury assessment

因为膨胀阀是属于超高精密加工的零件，在工厂对其内部调整机构零件的加工都在恒温状态下完成，其中的感温包的气体充填更是要求严格一致不允许一丝泄漏，在完成装配的膨胀阀还要经过严格的测试和耐疲劳老化抽检，膨胀阀的构造：1：感知温度的感温包；2：感温气体或者液体充填膨胀波纹腔；3：球型阀座；4球型阀；5：弹簧；6：过热度调整螺丝垫片和螺丝；7：内部和外部（H型）密封件；8：推力杆和波纹腔垫片；9：阀体；10：毛细管等等。感温包：是必须妥善接触固定在蒸发器的出口管道上，感知蒸发器实时回气温度的部件，它将充填物质的热胀冷缩压力通过相通的毛细管提供给膨胀波纹箱；膨胀波纹箱依据压力的变化推动推力杆结合过热度调整螺丝和弹簧的阻力来调整球型阀的开度，实现制冷量的精确调整。当回气管道温度升高，感温包内的物质膨胀，压力升高，膨胀波纹箱内压力也升高，波纹腔膨胀推动推力杆克服弹簧阻力，球型阀开度变大；当回气管道温度减低，感温包内的物质膨胀，压力降低，膨胀波纹箱内压力也降低，弹簧阻力推动推力杆压缩波纹腔，球型阀开度变小；如此不断的进行推拉调整平衡，只要制冷循环继续下去。

Because expansion valves are high precision processing components,factory in its internal adjustment of the body parts are processed in a state of complete thermostatic, the temperature of the gas filling kits are demanding more consistent not detect leaks, in the completion of the expansion valve assembly also undergo strict testing and fatigue resistance aging sampling, the construction expansion valves : 1 : Indeed temperature temperature kits ;2 : temperature gas or liquid filled with the expansion corrugated ;3 : spherical valve seat ;4 spherical valves ;5 : spring ;6 : overheating degrees adjustment screw spacer and screw ;7 : internal and external (H-type) sealed pieces ;8 : thrust poles and corrugated of spacer ;9 : Fati ;10 : capillary, and so on. Temperature kits : contact must be properly fixed in the evaporator export pipelines, real-time communication evaporator components to temperature degrees, the material will be filled through interlinked capillary pressure due to the expansion of corrugated boxes; swelling corrugated boxes on the pressure for change in the thrust pole with an adjustment screw and spring-loaded ball-type valves to adjust the resistance of the degrees of refrigeration volume precision adjustments. When the temperature to gas pipelines, temperature packets of material expansion, the pressure rise, inflation pressures are rising corrugated box, corrugated promote the expansion thrust to overcome the spring-loaded pole resistance, the ball-type valve opened for big change; When the gas pipeline to reduce the temperature, temperature of the material swelling up, the pressure lowered inflation corrugated box pressure also reduced, spring-loaded pole compressed corrugated of resistance to thrust, spherical valves open for smaller; This constant push and pull adjustment for the balance, as long as refrigeration cycle continue.

平衡阀[BALANCE VALVE]
从调节基本原理上看，平衡阀实际上就是一种有开度指示的手动调节阀。在平衡阀的上游、下游端各装一个测压孔，用来测量流体通过阀门的压降。使用时，测得阀门压降和读出开度，即可算得通过阀门的流量。其作用相当于调节阀和等效孔板流量仪的组合，使各个支路的流量分配达到要求。当总循环泵变速运行时，各个支路的流量分配比例保持不变。

From the basic principles of regulation viewpoint balancing valve is actually an instruction manual for the regulation valves. In balancing valve upstream and downstream ends of the tube with a hole, used to measure the fluid through valves pressure reduction. Use, detected valves pressure reduction and read out the degrees, can be considered by the flow valves. Its role to regulating valves and flow-combination hole equivalent to the slip road to the flow distribution requirements. When the total cycle pump gear shift operation, the flow of the slip road ratio unchanged.

动态平衡阀的工作原理： 通过改变平衡阀的阀芯的过流面积来适应阀门前后的变化，从而达到控制流量的目的。动态平衡阀是一个局部阻力可以变化的节流元件.当平衡阀前后压差小于最小启动压差是弹簧未被压缩，流通面积最大。当平衡阀前后压差超越工作范围是，阀胆完全压缩弹簧，水流只从阀胆两边的圆孔流过，此时阀胆变成了固定的调节器，流量与压差成正比，随压差的增大而增大.平衡阀具有在一定的压力范围内限制空调末端设备的最大流量、自动恒定流量的特点，在大工型、复杂、空调采暖负荷不恒定的工程中，简化了系统调试过成，并缩短了调试时间。

balancing valve dynamics operating principles : through changes in the flow Disc balancing valve the area around the valves to adjust to the change, thus achieving the purpose of flow control. Is a dynamic balancing valve local resistance to change spending components. When balancing valve and differential pressures are smaller than the smallest start differential pressures were not compressed spring-loaded, the largest circulation area. When balancing valve and differential pressures beyond the scope of work is completely compressed spring-loaded valves guts, guts flow only from valves on both sides of the square shed, when valves guts into a fixed regulator, the flow and differential pressures in proportion with the increase and differential pressures increase. balancing valve have some great pressure within the air-conditioning equipment to limit the maximum flow, automatic constant flow characteristics, in the large-type, complex, air conditioning load is not constant heating works, a simplification of the system into debugging, and shorten the debugging time.

溢流阀[OVERFLOW VALVE]
溢流阀按结构形式分为直动型和先导型，它旁接在液压泵的出口保证系统压力恒定或限制其最高压力，有时也旁接在执行元件的进口，对执行元件其安全保护作用。直动型溢流阀，主要有阀芯、阀体、弹簧、上盖、调节杆、调节螺母等零件组成。

Relief valves in the form of the structure and type of moving into straight-pilot, and it's up in Hydraulic Pump export guarantee system, or limitation of the maximum pressure constant pressure, sometimes adjacent to import components in the implementation of the components of its security role. Straight moving type relief valves, mainly valve disc, valve body,, spring-loaded, roof, regulation pole, conditioning nut, and other integral parts.

先导型溢流阀有先导阀和主阀两部分组成,先导阀为一锥阀，实际上是一个小流量的直动型溢流阀.随着溢流阀的进口压力增大，作用在先导阀芯上的液压力Fx随之增大，当Fx大于等于Pt2时，先导阀阀口开启，溢流阀的进口压力油经阻尼孔、先导阀阀口溢流到溢流阀的出口，然后回油箱。溢流阀进口压力油经主阀阀口溢流回油箱。主阀阀口开度一定时，先导阀阀芯和主阀阀芯分别处于受力平衡，阀口满足压力流量方程，主阀进口压力为一确定值。

Pilot valves and pilot-type relief valves are the main valves of two parts, pilot valves for cone valve, the flow is a small direct action type relief valves. With import pressure relief valves, pilot vavel disc role in the fluid pressure Fx attendant increase, when more than equal to Fx Pt2, pilot valves valves mouth opened, the pressure relief valves to import oil by damping hole, Pilot valves valves mouth overflow relief valves to export, and then back to the fuel tank. Imported oil pressure relief valves to the main valve valves mouth overflow back containers. Main valves valves mouth open for some time, pilot valves and the valve Faxin Faxin respectively in the balance of power, pressure flow valves meet the equation mouth, and the main valve to the pressure of a determined value of imports.

调压阀[PRESSURE GOVERNOR VALVE]
调压阀是由调压阀、油水分离器及单向阀等构成的一个组合阀总成。

Pressure governor valve is composed by governing valve, oil, water separation devices and a combination of one-way valves, etc.

调压阀的原理是利用了弹簧力与压力相平衡的原理，当弹簧的压力小于气压的时候阀关闭，当压力大于弹簧的弹力时候橡胶调压膜片下方的压缩空气对膜片的作用力，推动膜片向上拱曲离开阀座而使空气流入气腔，此时卸荷活塞在气压作用下移动，将排放阀门推离阀座，于是由空气压缩机充入气腔的空气便通过排放阀和排气口排入大气空气压缩机空转。调压阀的作用是限定系统的最高压力0.75-0.80兆帕(7.5-8.0巴)。在可靠工作的前提下确保系统安全。调压阀种类众多用途广泛,主要用于交通,及工业民用领域.

Pressure governor valve is the use of a spring-loaded power and pressure balance theory, when the spring-loaded pressure less than atmospheric pressure and the valves closed when the pressure is greater than the spring-loaded rubber tubing stretch when the bottom of compressed air diaphragm, diaphragm the effort to promote diaphragm upward and left vavle seat blow the air flow of gas, this would piston shirking role in the pressure mobile, Selection will be emissions from valve seat, air compressors made by the then air into the gas valves and exhaust emissions is through the mouth into atmospheric air compressors idling. pressure governor valve's role is limited to the maximum system pressure 0.75-0.80 trillion Pago (7.5-8.0 bar). In the context of ensuring reliable security

伺服阀[SERVO VALVE]
伺服阀主要分为力反馈式电液伺服阀和位置反馈式伺服阀.

Servo valves consists of feedback - electric-hydraulic servo valve and position feedback servo valves.

电液伺服阀的任务,是把电气转换为液压量去控制油动机. 伺服阀是由一个力矩马达,两级液压放大和机械反馈系统.力矩马达是由一个两侧绕有线圈的永久磁铁组成,当伺服阀两侧的线圈产生不平衡电流时,由于电磁力的作用,使衔铁及挡板发生偏转,伺服阀把电量转成换成位移量,第一放大是由不1个双喷嘴和平共1 个挡板组成,此挡板固定在衔铁的中点,并在2个喷嘴之间穿过,使伺服阀在喷嘴的端部与挡板之间形成2个可变的节流孔,由挡板和喷嘴控制的油压通往第二级滑阀两两端面上.伺服阀第二级滑阀是四通滑阀结构上,并嵌入滑阀中心的1个槽内,当衔铁处于中间位置时,挡板对流过两个喷嘴的油流的节 作用相同,滑阀的两端无差压

electric-hydraulic servo valve's task is to the volume of electrical switch to control oil for hydraulic motivated. Servo valves is a torque motor, both hydraulic and mechanical enlarged feedback system. torque motors on both sides by a permanent magnet around a coil formed when servo valves on both sides of the coil produce an electric currency, as a result of electromagnetic power, and the back plate of the armature deflection, servo valves to be converted into electricity displacement volume, the first enlarged by one double nozzles peace were one back plate composition of the back plate is fixed at the mid-point of armature, and in between the two nozzles through to servo valves at the end of nozzles and a back plate between two variable costs Kong. by the back plate and nozzles controlled hydraulic slide-valve leading to the second level at two levels. servo valve secondary slide-valve is spun slide-valve structure, and embedded slide-valve inside the center one, when armature in the middle position, the back plate convection flow of

节流阀[THROTTLE VALVE]
节流阀又称膨胀阀、调节阀，他是制冷系统不可缺少的四大重要设备之一。节流阀的作用是对冷凝器输出的高压液态制冷剂进行节流降压和调节流量。制冷剂液体经过节流阀节流降压后成为低温低压的汽液混合流体，经过氨液分离器分离掉无效的蒸汽后供往蒸发器中蒸发吸热。节流阀的型式很多，结构也各异，但是他们的基本原理均是使高压的液态制冷剂被迫通过一个适应系统流量的“小孔”，使其通过小孔时需要克服很大的流动阻力，因而使压力发生聚变，与此同时，一部分液体化为蒸汽，并从其本身吸取汽化潜热，因而使膨胀后的汽液混合流体变成低温低压状态。节流阀的阀芯为针形锥体或带缺口的锥体，阀杆的螺纹为细牙，当旋转手轮时，阀芯移动的距离不大，液体通过的面积也就很小，此时可以造成很大的局部阻力，高压液体通过小孔时消耗能量而降压。节流阀开启度的大小是根据蒸发器热负荷的变化而调定通常其开启度为手轮的八分之一至四分之一周，不能超过一周，否则开启度过大，即失去节流作用。

throttle valve as expansion valves, regulating valves, it is refrigeration system indispensable four one important equipment. throttle valve role is the export of high-pressure liquid coolant condensers to reduce and regulate the flow of relief. Coolant liquid after throttle valve expenditure of relief after a low-temperature low-voltage gas liquid mixed fluid, after separation into ammonia liquid separation devices for invalid after steam vaporizer, to evaporation endotherm. throttle valve many patterns, structures also vary, but their basic principles are that the high-pressure liquid coolant forced to adapt to the system through a flow "puncture wounds on the" make it through the puncture wounds on the need to overcome the considerable resistance movement, resulting in fusion pressure, and at the same time, some liquid into steam, and from its own lessons vaporization latent heat, thereby expanding the gas into liquid cryogenic fluid mixed low voltage state. throttle valve the Faxin for needle-shaped cone or belt gaps Cone, the thread for Fagan small teeth, when round-hand, the distance is Faxin mobile, liquid through the area is small, this can cause considerable local resistance, high pressure liquid through the puncture wounds on the consumption of energy and relief. throttle valve opened degrees is based on the size of the evaporator heat load changes that will be open for its usual hand for the eighth round to fourth week and not more than one week, otherwise spend big opening, lost spending.

液压阀[HYDRAULIC VALVE]
液压阀的品种繁多，除了不同品种、规格的通用阀外，还有许多专用阀和复合阀。就液压阀的基本类型来说，可按以下几种方式进行分类：按功能分类,1．压力控制阀用来控制液压系统中液流压力的液压阀。2．流量控制阀用来控制液压系统中液流流量的液压阀。3．方向控制阀用来控制液压系统中液流的流动方向的液压阀。除了上述具有单一功能的通用液压阀以外，还有一些专用液压阀和复合液压阀具有两种以上的功能，例如既能控制方向又能控制压力，或既能控制方向又能控制流量，等等。

Hydraulic valves of a wide variety, in addition to different varieties, specifications generic valves, there are many specialized valves and complex devices. Hydraulic valves on the basic types, classified according to the following manner : by functional classification 1. Hydraulic pressure control valves used to control the hydraulic pressure system flow valves. 2. Flow control valve hydraulic system used to control the flow of hydraulic valves Ye Liu. 3. Hydraulic control valves used to control the direction of the system flow mobile hydraulic valves direction. In addition to the overall function of a single hydraulic valves, hydraulic valves and a number of specialized hydraulic valves with more complex functions, such as pressure control can only control the direction or control which can control the direction of flow, and so on.

按控制方式分类1．定值或开关控制阀这类液压阀借助于通断型电磁铁或手调机构等方式，将阀芯位置或阀芯上的弹簧设定在某一工作状态，从而使液流的压力、流量或流向保持某一定值。这种液压阀属于最常见的普通液压阀。2．比例控制阀这类阀的输出量（流量、压力）可以按照输入信号的变化规律连续成比例地进行调节。它们常采用比例电磁铁将输入的电信号转换成力或阀的机械位移量，进行控制。也可以采用其它形式的电气输入控制器件。由于比例阀结构简单、工作可靠、价格较低，性能较普通的定值控制阀有明显提高，并且可以通过电信号进行连续控制，因此在许多场合获得了广泛应用。

Controlled manner by classification 1. Constant control valves or switches such hydraulic valves through hands-off type of electro-magnet or transfer institutions, will valve disc location of the spring-loaded or valve disc set in a working condition so that flow pressure, or flow to maintain a certain flow value. This hydraulic valves are the most common ordinary hydraulic valves. 2. Proportional control valves such devices export volume (flow, pressure) can be imported in accordance with the law of change in the continuous signal proportional to regulate. They often use imported electrical signal proportional electro-magnet will be converted into mechanical power or valves displacement volume control. Can also use other forms of electrical control devices. Because of valves structure simple, reliable work, the lower the price, performance than ordinary constant control valves have markedly improved, and through continuous electrical signal control, and therefore, on many occasions, gained widespread application.

防火阀[FIRE SAFE VALVE]
防火阀是指安装在通风、空调系统的送、回风管路上，平时呈开启状态，火灾时当管道内气体温度达到70℃时自动关闭，在一定时间内能满足耐火稳定性和耐火完整性要求，起隔烟阻火作用的阀门。排烟防火阀是指安装在排烟系统管道上，平时呈开启状态，火灾时当管道内气体温度达到280℃时自动关闭，在一定时间内能满足耐火稳定性和耐火完整性要求。起隔烟阻火作用的阀门。

Fire proof valve refers installed in the ventilation, air-conditioning systems to send, and the road back to the wind, opened in a state of fire when the temperature reached 70 degrees, the gas automatically closed in a certain period of time to meet the fire resistance requirements of the stability and integrity of fire resistance, a possible role of the fire fight valves. Smoke extraction fire fight valve refers smoke extraction system installed in the pipeline, in an open state of the gas pipeline fires when the temperature reached 280 degrees automatically closed in a certain period of time to meet the fire resistance stability and fire resistance integrity. A possible role valves smoke proof.

防火阀有两种，70度和280度，70度用于新风机，当温度到达70度时关闭新风机，证明已经着火了，再别进风了。当温度达到280度时，关闭排烟风机，要不然火会顺着风道烧到别的地方。 一、防火阀从温度划分：有70摄氏度和280摄氏度的。 二、防火阀从控制划分有手动的和DC24V电磁铁控制，即电动的； 三、防火阀从远近控制的有远程控制和本体控制的。

There are two kinds of fire proof valves , 70 degrees and 280 degrees, 70 degrees for the new air-compressors, when the temperature reached 70 degrees, the closure of the new air-compressors, has proven fire, another into the wind again. When the temperature reached 280 degrees, the closure of smoke extraction air-compressors, or else the fire will run wind Road reached elsewhere. 1, fire safe vavle from temperature divided : 70 degrees Celsius and 280 degrees Celsius. Second, from control by fire safe valve DC24V electro-magnet and a manual control, electric; 3, fire safe valve far from the control of the remote control and identity control.

三通阀[THREE WAY VALVE]
三通阀：诞生于50年代。三通阀有3个出入口与管道相连，相当于两台单座阀合成一体。三通阀最早是用于代替两台单座阀投入系统使用。三通阀分为合流和分流两种。三通阀有3个出入口与管道相连，相当于两台单座阀合成一体；使用三通阀时，可省掉一个两通阀和一个三通接管。三通合流阀有两个入口，一个出口，将两种介质混合成第三种介质。三通分流阀有一个入口，两个出口，将一种介质经过阀后分成两路。

Three-way valve : born in the 1950s. Three-way valve has three entrances and pipes, equivalent to two single-Block valves synthetic one. Three-way valve is used to replace two single-Block, the first valve input system. Three-way valve into two hands and streaming. Three-way valve has three entrances and pipes, equivalent to two single integrated Block valves; Use three-way valve, a two-valve and can be saved over a three links. Convergence devices have two three links entrance, a export, two medium mixed into the third medium. Three links a triage valves entrance, the two exports, a medium through valves will be divided into two after the road.

（1）三通阀可代替两台互为开关的两个两通阀使用，可省掉一个两通阀和一个三通接管。（2）三通阀常用于热交换系统旁路调节，也可以做简单配比调节。（3）三通阀使用介质温度应小于300℃，两种介质温度差应小于150℃。（4）三通阀更换气开气闭时，必须更换执行机构。（5）DN＜80时，合流阀也可做分流阀用。

(1) The three-way valve to replace two mutually switches two two-valves used to save a two-valve and a three links takeover. (2) The three-way valve used to regulate heat exchange system exists, can do simple limited regulation. (3) three-way valve used to be less than 300 degrees medium temperature, two medium temperature less than 150 degrees should be poor. (4) The three-way valve replacement gas to gas shut, the executing agency must be replaced. (5) DN <80, Convergence valves also do triage valves.

气动调节阀[PNEUMATIC VALVE]
气动调节阀由气动执行机构和调节阀两部组成。执行机构是执行器的推动装置，它以压缩空气为动力，输出推力；调节阀是执行器的调节部分，直接与介质接触，调节介质的流量。由于气动调节阀具有结构简单，动作可靠，输出推力大，维修方便，防火防爆和价廉等优点，气动调节阀广泛应用于化工、石油、冶金、电力、轻纺等工业生产过程的自动调节和远程控制中。

Pneumatic valves regulate the pneumatic enforcement agencies and regulatory valves two. Enforcement agencies to promote the implementation of devices installed, it compressed air-driven, export thrust; Regulation valves are part of the implementation of devices to regulate direct contact with the media, regulatory medium flow. The pneumatic - valve structure with simple, reliable operation, export thrust large maintenance convenient and inexpensive, such as fire blast merits pneumatic - valve widely used for chemical, oil, metallurgical, electrical, textile and other industrial production processes autopilot and remote control.

气动调节阀在公称压力和温度范围内可调节各种液体、气体和蒸气，气动调节阀关闭时泄漏量小。气动调节阀按执行机构的作用方式可达到气开或气闭之目的。

Pneumatic valves regulate the temperature in the context nominal pressure and may adjust various fluids, gases and steam, pneumatic - valve closed, leakage small. Pneumatic-valve at the role of the implementing agencies could reach a gas open or gas shut purposes

压力调节阀[PRESSURE REGULATING VALVE]
压力调节阀是一种无需外来能源而只依靠被调介质本身的压力变化进行压力自动调节的节能型产品， 您只需在压力调节阀设备调试过程中根据自身工艺要求在压力调节阀的引导指挥系统上设定压力调节阀后压力值，压力调节阀就会将气源压力调节为您设定的阀后压力并自动维持其恒定

pressure regulating valve is a reliance on external energy transfer medium itself was pressure changes pressure-type automatic adjustment of product, you can adjust the valve in the pressure equipment debugging process in accordance with their own processes pressure regulating valves for the guide command system set pressure after pressure regulating valves value, pressure regulating valves will be natural gas pressure regulating valves, the pressure for you to set and automatically maintain its constant;

压力调节阀用于您在主控室内远程控制下游氧气流量；流量孔板用于将现场氧气压力调节阀组实际工艺参数反馈到主控室，使您可以方便地远程调控现场氧气压力调节阀组

Pressure regulating valves in the control room for your remote control oxygen flow downstream; Flow will be used for on-site oxygen pressure regulation and feedback to control the actual process parameters to control the distance. you can easily adjust the oxygen pressure

温控阀[TEMPERATURE CONTROL VALVE]
温控阀主要起温度控制作用.温控阀的传感器具有提供比例调节的充气 波纹管。温控阀传感器是由四周室温控制,波纹管内的效准压力与室温负荷相对应，该压力由一个调整弹簧的张力来均衡。当室温上升时，温控阀波纹管内的液体压力随之上升，驱使温控阀锥趋向关闭位置直至波纹管与弹簧之间得到平衡。

temperature control valve a major role in temperature control. temperature control valve sensors provide a ratio adjustment charge corrugated pipes. temperature control valve from around the room temperature control sensors, corrugated effect of the load relative to the prospective pressure and room temperature, the pressure from a spring tension adjustment to balance. When the room temperature increases, the liquid pressure temperature control valve corrugated pipes have increased and driven temperature control valve cone is closed position until corrugated balance between control and spring-loaded.

温控阀可以根据用户的不同要求设定室温，它的感温部分不断地感受室温并按照当前热需求随时自动调节热量的供给，以防止室温过热，达到用户最高的舒适度。温控阀可以自动地按预定的要求保持准确的室温，而不受气候条件的影响。在每个房间内安装一个温控阀，保障能够充分利用阳光、照明设施、机械和人体所散发的“免费”热能，以打到节省能源的效果。

temperature control valve according to the different requirements of users set room temperature, its temperature constant feeling of the current hot demand at room temperature and in accordance with the automatic adjustment of heat supply in order to prevent overheating room temperature, users achieve the highest comfort. temperature control valve can automatically according to the requirements of maintaining accurate room temperature, without the impact of climatic conditions. Installed in each room of a temperature control valve guarantee to make full use of sunlight, lighting, mechanical and human circulated by the "free" heat to hit the effect of saving energy.

蝶阀[BUTTERFLY VALVE]
蝶阀是用随阀杆转动的圆形蝶板作启闭件,以实现启闭动作的阀门.蝶阀主要用截断阀使用,亦可设计成具有调节或截断兼调节的功能.目前蝶阀在低压大中口径管道上的使用越来越多

Butterfly valve is on/off by the turning of the stem which operate the round butterfly disc. It is mainly used as cut-off valve and also can be designed as regulating or cut-off / regulating combined valve. currently , butterfly is mainly used in the low pressure large size pipelines.

蝶阀的蝶板安装于管道的直径方向。在蝶阀阀体圆柱形通道内，圆盘形蝶板绕着轴线旋转，旋转角度为0°~90°之间，旋转到90°时，阀门则牌全开状态。

butterfly valve panels installed at the Tip of the diameter pipeline direction. In butterfly valve body flight corridors, the disc-shaped Tip boards around rotary axis, rotation angle for 0° -90 meridian east between rotary to +90, the valves are open all licence conditions.

蝶阀结构简单、体积小、重量轻，只由少数几个零件组成。而且只需旋转90°即可快速启闭，操作简单，同时该阀门具有良好的流体控制特性。蝶阀处于完全开启位置时，蝶板厚度是介质流经阀体时唯一的阻力，因此通过该阀门所产生的压力降很小，故具有较好的流量控制特性。蝶阀有弹密封和金属的密封两种密封型式。弹性密封阀门，密封圈可以镶嵌在阀体上或附在蝶板周边。

butterfly valve structure simple, small size, light weight, only by a few parts. But it can be rapidly open and close-90E, simple to operate, while the fluid control valves have good character. butterfly valve a fully open position, Tip board thickness is only when the medium flows through body resistance, the pressure generated by the air valves small, it has a better flow control characteristics. butterfly valve a metal shells sealed and the two sealed sealed patterns. Flexible sealed valves, seal ring can embed in body or peripheral board, , s to Tip.