Features and Benefits:
- ATEX Zone 1, Group IIB, T4 (135°C) or Zone 21 approved
- Externally switched solenoid
- Automatic closure on loss of power
- 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:
- Engines operating in Hazardous Areas:
- Offshore Wells*
- Onshore Refineries
- Stationary Mining Equipment
- Generators
Chalwyn Electric Actuated Diesel Engine Shutdown Valve
The Chalwyn SVX hazardous area, flameproof series of butterfly air intake shutoff valves are ATEX approved for Zone 1, Gas Group IIB, T4 (135°C) or Zone 21 hazardous area applications.
The SVX flameproof energize to open valve is designed with “fail safe” actuation. When power is applied to the solenoid, the valve opens and is held open as long as power is supplied. When power is cut off for any reason such as the detection of an engine overspeed condition or other unsafe engine operating conditions, the valve will close.
Flammable gas or vapor drawn into the intake of a diesel engine acts as an additional ungoverned fuel supply and can cause uncontrolled engine overspeed followed by mechanical failure or flash back from the intake, resulting in ignition of the surrounding flammable atmosphere. When this occurs, the only certain way to stop the engine is by the operation of an air intake shutdown (shutoff) valve.
The Chalwyn SVX hazardous area series of butterfly air intake shutoff valves are ATEX approved for Zone 1, Gas Group IIB, T4 or Zone 21 hazardous area applications. The 12 and 24VDC valves are designed with “fail safe” actuation. The valve is held open when electrical power is supplied to the solenoid. When power is cut off due to the detection of an engine overspeed condition or cut off for any other reason, the valve will close.
