Features
· Belong to single-acting linear actuators,It can be used to drive Straight stroke valve,like Passthrough 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
Model | BZHA/B-11 | BZHA/B-22 | BZHA/B-23 | BZHA/B-34 | BZHA/B-45 | BZHA/B-56 |
Stroke mm | 10 | 10、16 | 16、25 | 40 | 40、60 | 100 |
Effective area cm2 | 200 | 350 | 350 | 560 | 960 | 1600 |
Air supply connection | M10×1 | M12×1.25 | M16×1.5 | |||
Air supply pressure | 0.14MPa、0.25MPa | |||||
Ambient temperature | -30℃~+70℃ | |||||
Spring pressure range MPa | 0.02~0.1、0.04~0.1、0.08~0.24 |
Overall dimensions Chart
Model | BZHA/B-11 | BZHA/B-22 | BZHA/B-23 | BZHA/B-34 | BZHA/B-45 | BZHA/B-56 |
L (mm) | 80/70 | 100/84 | 100/75 | 154/114 | 180/115 | 260/160 |
H2 (mm) | 220 | 270 | 300 | 375 | 490 | 720 |
D1 (mm) | / | 80 | 80 | 105 | 122 | 130 |
D2 (mm) | 32 | 60 | 60 | 80 | 95 | 100 |
A (mm) | 236 | 285 | 285 | 360 | 470 | 620 |
n-φd (mm) | / | 2-φ10 | 2-φ10 | 4-φ12 | 4-φ14 | 4-φ18 |
M | M8 | M8 | M8 | M12×1.25 | M16×1.5 | M20×1.5 |
Weight(Kg) | 10 | 12 | 16 | 22 | 52 | 125 |