PVX Pneumatic Spring Return Air Shut Off Valve

SKU PVX (CE218)

The Chalwyn PVX pneumatic spring return butterfly valve—part of our diesel engine safety products —uses a spring return rotary actuator for reliable shutdown control. It is available in two basic versions:

Air pressure to open / spring return close on loss of air pressure (failsafe)
Air pressure to close / spring return open on loss of air pressure

Both versions are designed to work with direct pressure operation in either automatic or manual systems.

Features

For use in automatic or manual shutdown systems
Operating pressure range 43.5 to 116psig (3 to 8bar)
Slim-fit 3”, 5”, and 8” (76mm, 127mm, and 203mm) valve body
Basic flange mount with hose adaptors available (1½” to 8” | 38 to 203mm)
Valve bodies and discs are PTFE coated hard anodized aluminum
Shaft and mechanisms are stainless steel

Applications

Failsafe PVX-300, PVX-500, PVX-800

Pressure to open/loss of pressure to close
Failsafe application to meet EU ATEX 94/9/EC defined hasardous areas
Zone 1 and 2 applications to EN 1834 engine safety standards
US offshore engines to Class 1 Div 1 safety standards
International offshore platform engine installations

PVX-301, PVX-501, PVX-801

Petrochemical and LNG refineries
All international areas where non-failsafe is permitted
US offshore BOEMRE safety standards
Zone 2 fire pump engine offshore applications
Vehicles with air brakes

More Information

ENGINEERING UNITS

IMPERIAL METRIC

Size (in)	2.5"
Size(mm)	65
End Connection	Hose Barb
Actuation	Pneumatic
Position Indication Available	No
Connectors	TBD
Position Indication Logic	Valve Open - Switch Open
Side	Left
Elbow Kit	Valve Only (No Elbow)
Style	Butterfly
Max Air Intake Temp (F)	257
Min Air Intake Temp (F)	-40
Max Pressure (psi)	TBD
IP Protection	No
Hazardous Location Certification	No
Power To Close or Energize To Run (Fail Safe)	Fail Safe
Reset	Auto Reset