The small-sized pneumatic diaphragm direct-acting double-seat regulating valve is composed of a ZHA-type pneumatic diaphragm multi-spring actuator and a direct-acting double-seat valve. The valve part is the same as the ZMAN series pneumatic diaphragm direct-acting double-seat regulating valve, with the advantages of large flow capacity, small unbalanced force, and convenient replacement of the action mode. However, due to the use of the ZHA-type pneumatic actuator, it is small in size and light in weight, so it can be widely used in the petrochemical, textile and other industries where the leakage requirements are not strict and the installation space is compact. Automatic control system.

pneumatic diaphragm direct-acting double-seat regulating valve

- Nominal diameter DN (mm): 25-200mm
- Valve seat diameter DN (mm): (26, 24)-(200, 197)
- Rated flow coefficient Kv: 10-630
- Action mode: air-to-close; air-to-open
- Spring pressure range (KPa): standard 20~100, optional 40~200, 20~60, 60-100
- Air supply pressure (MPa): standard 0.14; optional 0.24