Features
· Belong to single-acting linear actuators,It can be used to drive Straight stroke valve,like Pass through valves, globe valves, etc.
· Small size, light weight, convenient operation and maintenance characteristics.
· The pneumatic control instrument input pressure is converted into displacement variation of putter.
· Connected with regulating valve,The spool can be moved to a position corresponding to the input signal.
· Multi-spring type, compact structure, large output force.
·According to user requirements, can be equipped with positioner, Air filter pressure reducer, limit switches, hand wheel, the solenoid valve.

Acting Type
Positive effects: BZHA positive-acting actuators,diaphragm air chamber Supply air pressure increases,Actuator push rod downward movement.
counteraction: BZHB counteraction actuator:diaphragm air chamber Supply air pressure increases,Actuator push rod upward movement.

Major component materials

The upper and lower diaphragm casing: steel
Diaphragm: NBR & nylon
Pressure spring: 60Si2Mn
Bracket:HT200,ZG250
Shaft seals: polyurethane (for counteraction)
Push lever:2Cr13

Main performance indicators

Basic error:≤±1%；≤±4% (without positioner)
Return difference:≤1%；≤2.5% (without positioner)
Dead: ≤0.8%；≤2.5% (without positioner)
Rated stroke deviation:≤+2.5%；≤+4% (without positioner)
Rated stroke deviation:≤±2.5%；≤±4% (without positioner)
diaphragm Compressive strength: :20~24MPa
Working life:not less than 30 million times

The main technical parameters

Overall dimensions Chart