4320 / 4420 - Turbine Fuel Shutoff Valve

Features

●Stainless Steel Housing (Meets NACE MR-0175-92)

● Less than 100 Millisecond Close Time

● Stainless Steel or Cast Steel Body

● 2-Way & 2-Way Vented

● Stainless Steel or Aluminum Internals

● ANSI Class 300 or 600 Flange Connections

● Open/Closed Position Switch Indication (Optional)

● Solenoid Pilot Valve (Optional)

Applications

●Fuel Shutoff Valve for Gas Turbines

● Starting Air/Gas Valve

● Vented Fuel Gas Valve

Operation

Model 4320/4420 has been designed specifically for use as a fuel shutoff valve in gas turbine applications. Durable high quality construction, compact size, and quick close time makes the 4320 / 4420 ideal for use with gas turbines in the 10 to 30 MW size range.

Model 4320/4420 is a single acting, spring return, pneumati-cally actuated valve, and is available in both 2-way and 2- way vented versions:

2-Way Version
When pressure is applied to the pilot port, the valve is opened to allow flow to travel from the IN Port to the OUT Port. When the pilot pressure is released, a spring closes the main ports.

2-Way Vented Version
When pressure is applied to the pilot port, the valve is opened to allow flow to travel from the IN Port to the OUT Port. The VENT Port is closed. When the pilot pressure is released, the IN Port closes while the VENT Port opens to the OUT Port. This venting relieves pressure within the valve and in the down stream piping.

The 2-Way Vented version is ideal for gas turbine applica-tions because, upon shutdown, it relieves and vents pres-sure on the downstream side. This action eliminates the need for a separate bleed valve, providing a cost savings and simplified piping.

Specifications

Body Material................................................316 Stainless Steel or Cast Steel
Trim Material.................................................316 Stainless Steel or Anodized Aluminum
Seal Material.................................................Viton
Maximum Pressure: See Chart on left
Pilot Pressure to Actuate..............................60-150 psi
Connections:
2" Valve...................................................ANSI Class 300 or 600 RF Flange
3" Valve...................................................ANSI Class 300 or 600 RF Flange
Vent Port.................................................3/8" NPT
Solenoid/Position Switch Connections....1/2" NPT

Flow Coefficient Cv:
2" Valve...................................................83
3" Valve...................................................130
Close Time....................................................Less than 100 ms
Seat Leakage................................................ANSI Class VI
Position Switch Ratings
................................UL Class 1, Groups A, B, C & D
............................... CSA Class 1, Div. 1, Groups A, B, C & D. Solenoid Valve

Ratings.................................UL & CSA Class 1, Div. 1, Type H Coil