Pre-pinched Port
Mechanically Pinched
Single Pinch Mechanism
Simple Economical Design
- Low pressure drop
- No packing
- Drop tight closure
- On/Off or throttling service
- Linear throttling characteristic
- Fail Open or Fail Closed pneumatic actuators
- Long lasting compression molded sleeve
Applications: Ideal for automatic control of abrasive, viscous, and corrosive fluids including wastewater, mine slurry, chemicals, cement, pulp , powder and pellets.
Operation: A pre-pinched pneumatically operated valve with the maintenance free Onyx Actuator. The actuator uses a spring for reliable fail-open (PFO) or fail-closed (PFC) operation in a range of sizes. It does not require lubricated air.
Specifications:
- Flanges: ANSI STD. 125/150 lbs
- Housing: Cast iron, ASTM A48, Class 35
- Stem: 303 stainless steel
- Yoke: Carbon steel
- Actuator: Cast iron/PVC
Options:
- Epoxy paint
- Sleeve elastomer
- 316 stainless steel stem
- ANSI STD 300 lbs. Flange
- Secondary containment package
- Auxiliary hand wheel
- Positioners
- Solenoid valves
- Limit switches
Valve Sizes:
Actuator Sizes:
Actuator Selection Information
Click to review options
Double Acting Cylinder
PFO - Pneumatic Fall Open
PFC - Pneumatic Fall Closed
PFO - Pneumatic Fall Open
PFC - Pneumatic Fall Closed
All mechanically pinched pneumatic valves are available with 2 families of pneumatic actuator:
- A conventional air double acting cylinder. Air is applied alternating to the cylinder head and cylinder bottom to open and close the valve. This is inherently a Fail-in-last-position actuator.
- Onyx "Bomb Proof" zero maintenance actuator. This actuator is designed around a firestone airbag for the most robust construction and zero maintenance. It is available in two configurations:
- Valve Size
- Fail Mode
- Process Pressure
