Pneumatic control valve, also known as control valve, is a device that changes the flow rate through power operation in a process control system. The pneumatic regulating valve consists of an actuator and valve body components to regulate flow. Pneumatic control valves are the main type of actuators. Lianggong valve actuator is an instrument that directly changes operating variables and is a terminal component. In addition to regulating valves, actuators also include products such as pneumatic motors, pneumatic robots, solenoid valves, and electric speed regulating pumps.

执行机构是将控制信号转换为控制阀截流部件位置或其他调节机构状态的相应动作的装置。信号或驱动力可由气动、电动、液动或任意组合组成。良工阀门阀体部件是气动调节阀的调节部件，主要由阀壳、阀杆、阀芯、阀座、压盖和密封件组成。它们直接接触介质，改变阀芯和阀座之间的循环面积，以实现调节流量的目的。

The actuator is a device that converts control signals into corresponding actions to control the position of the valve shut-off component or other regulating mechanism states. The signal or driving force can be composed of pneumatic, electric, hydraulic or any combination. The valve body components of Lianggong Valve are the regulating components of pneumatic control valves, mainly composed of valve casing, valve stem, valve core, valve seat, gland, and sealing parts. They directly contact the medium, changing the circulation area between the valve core and valve seat to achieve the purpose of regulating flow.

气动调节阀采用多弹簧气动膜执行机构，单座调节阀阀体采用等截面S型流道设计，阀芯采用顶导结构，体积小，重量轻，流量轻

The pneumatic regulating valve adopts a multi spring pneumatic diaphragm actuator, and the single seat regulating valve body adopts a constant cross-section S-shaped flow channel design. The valve core adopts a top guide structure, which is small in size, light in weight, and light in flow rate

能力大，泄漏小；套筒和双座调节阀采用压力平衡结构，具有压差大、运行平稳、噪音低等优点。

Large capacity, small leakage; The sleeve and double seat regulating valve adopt a pressure balance structure, which has the advantages of large pressure difference, smooth operation, and low noise.

单座、双座、套筒、角形、隔膜、三通调节阀可根据允许压差、介质特性和工艺管道要求选择；

Single seat, double seat, sleeve, angular, diaphragm, and three-way regulating valves can be selected based on allowable pressure difference, medium characteristics, and process pipeline requirements;

根据工艺要求，流量特性可选直线，等百分比，快开；

According to process requirements, the flow characteristics can be selected as straight line, equal percentage, and quick opening;

公称压力可根据压力选择PN1.6MPa,PN4.0MPa,PN6.4Mpa的调节阀；

The nominal pressure can be selected according to the pressure, with regulating valves of PN1.6MPa, PN4.0MPa, and PN6.4Mpa;

铸铁、铸钢、铸不锈钢、铸合金钢、煅钢等材料的调节阀可根据介质的防腐要求和压力等级选择；

Control valves made of materials such as cast iron, cast steel, cast stainless steel, cast alloy steel, and forged steel can be selected based on the anti-corrosion requirements and pressure level of the medium;

根据介质温度和特殊要求，可选用标准型、高温散热型、低温型、夹套保温型调节阀；

According to the medium temperature and special requirements, standard type, high-temperature heat dissipation type, low-temperature type, and jacket insulation type regulating valves can be selected;

根据介质泄漏和考虑，可选择硬密封、软密封、波纹管密封等调节阀；我厂硬密封调节阀泄漏等级高于IV等级；软密封调节阀无泄漏；

Based on medium leakage and safety considerations, regulating valves such as hard sealing, soft sealing, and corrugated pipe sealing can be selected; The leakage level of our factory's hard seal regulating valve is higher than level IV; The soft seal regulating valve has no leakage;

根据气源和控制设备，可选信号范围为20~100Kpa，40～200Kpa，4～20mA.DC，0～10mA.DC；

According to the gas source and control equipment, the optional signal range is 20~100Kpa, 40~200Kpa, 4~20mA.DC, and 0~10mA.DC;

根据良工阀门工艺控制要求，可配备以下附件：手轮机构、阀门定位器、空气过滤减压器、电气转换器、阀电磁阀、保位阀等附件。

According to the process control requirements of Lianggong Valve, the following accessories can be equipped: handwheel mechanism, valve locator, air filter pressure reducer, electrical converter, valve solenoid valve, retaining valve, and other accessories.

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