Pneumatic high temperature control valve, composed of multi-spring pneumatic film actuator (or piston pneumatic actuator) and low flow control valve body composition, multi-spring actuator height is low, light weight, easy to install. Pneumatic film high temperature control valve body flow channel was S streamlined, with a compact structure, light weight, sensitive action, the pressure drop loss is small, the valve capacity, the flow characteristics of precision, easy maintenance, pneumatic high temperature control valve adjustment mechanism using balanced Valve plug structure, with good valve stability, not easy to shake, low noise, small sensitivity to temperature. Pneumatic film high temperature control valve is particularly suitable for leakage requirements are not high, the higher the temperature of the occasion.1、Key performance indicators 

The item does not have a locator with a positioner

The basic error% ± 5.0 ± 1.0

Hysteresis% ≤3.0 ≤1.0

Dead zone% ≤ 3.0 ≤ 0.4

Always Point Deviation% Gas Start Point ± 2.5 ± 1.0

Starting point ± 5.0 ± 1.0

Air start point ± 5.0 ± 1.0

End point ± 2.5 ± 1.0

Rated stroke deviation% ≤2.5

Leakage L / h 0.01% × valve rated capacity

Adjustable range R 30: 1

2、different types of structural comparison