Valve accessories and accessories:
With the continuous improvement of industrial requirements, the performance requirements for valve products are also increasing. Some enterprises will improve the valve structure, and many manufacturers will add accessories and accessories to improve the performance and use of the valve, so that the valve to achieve a simple multi-purpose functions. 

Valve accessories and accessories are many, mainly around the intelligent remote control and multifunctional development, common in the drive mode of improvement, and also in the structure of the addition. Nowadays, the users of accessories are more and more attention by the users, the description and use of their accessories methods, Taiwan officials will be in the future articles in detail. 

Valve accessories are:
1. Pneumatic actuator: pneumatic actuators is mainly divided into single and double actions, the single action is the spring return type structure, the double action is the principle of gas opening and gas opening, and the regulating type generally uses the double action pneumatic actuators. 

2. Electric actuator: the common electric actuator has straight stroke, angular travel, fine small, explosion - proof, electric actuator structure is relatively complex, the cost is high, its performance is stable, fast and close, suitable for long distance control system. 

3. Hydraulic actuator: the hydraulic actuator is a device that can be converted into mechanical energy by hydraulic power, mainly in linear and rotary. Its high cost structure is relatively complex, is the special conditions and requirements of high use of products, the market general rate is small. 

4. The gas-liquid linkage actuator: the gas-liquid linkage actuator takes the pipeline natural gas or nitrogen as the power, and the hydraulic oil as the driving medium drive pipeline valve opens and closes. It is mainly used in natural gas, liquefied gas, nitrogen, gas liquid tank, gas and so on as a multifunctional driving device.

5. Eectro - hydraulic linkage actuator: electro - hydraulic linkage actuator consists of two parts: control module and power module. the intelligent controllable motor accepts the function command of control module, control power module, output distance from line or angular displacement, pneumatic control object, through self - shift feedback, complete the adjustment process and realize various functional control. 

6. Manual actuator: manual control is performed when the current is not stable and the pressure is insufficient. when the pressure and current can't be controlled or installed, the manual feedback device can be opened and manual control can be performed quickly when the pressure and current are unable to control or install the maintenance without current and air pressure. 

Actuator attachment:
Locator, electro - hydraulic server, servo amplifier, electrical converter, air filter, pressure reducing valve, valve position transmitter, Bao valve, solenoid valve, limit switch, intelligent module, alarm, quick exhaust valve, signal generator. 

Valve components:
Handle, handwheel, worm gear, valve body, valve core, stem, bonnet, muffler, blank, bolt nut, clamp, spring, diaphragm, packing, packing, o - ring, PTFE products gasket, flange, non-standard rigid parts, etc.