Excess Flow Valves

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Excess Flow Valves
Model 6290 Series

Description

The Model 6290 Series Excess Flow Valve is a non-attitude-sensitive excess flow shut-off valve designed to operate with a wide range of inlet pressures. The capability of operating from 10 to 3000 psi allows it to be used either between a high pressure source and a pressure regulator, or in the low pressure delivery line to a process. In both applications, this control valve will automatically shut off the delivery of gas if the flow exceeds the preset limit.

Operation

The shutoff mechanism of the Model 6290 Series Excess Flow Valve is incorporated within a 1/4 inch SS high purity valve. The actuating knob has been designed to manually operate the valve and clearly indicate the relative operating condition . . . either "Open (Reset)" or "Auto (Shut off)".

Operating Parameters

Supply Pressure: 10 to 3500 psi

Differential Pressure: 4 psi range A, C; 12 psi range F

Temperature: -10ºF to 200ºF (-23ºC to 93ºC)

Leak Rate He:
Outboard:
Inboard:
less than 2 x 10 -9 scc/sec
less than 2 x 10 -10 scc/sec

Surface Finish (Ra): 20 Micro-Inch or less

Shipping Weight: 2 lbs

Specifications

Material Construction

Wetted: -

Body: 316L SS

Outboard Seal: Metal to metal

Seat: Kel-F®

Poppet: 316L SS

Diaphragm: Elgiloy®

Non-Wetted: -

Knob: Anodized aluminum

Stem: 416 SS (lubricated)

Cap: 316 SS

Ordering Information

Model Flow Limit at Inlet/Outlet
Connections

1000 psi 30 psi

6295-A 4 slpm 0.5 slpm 1/4" NPT Female

6295-C 20 slpm 4 slpm 1/4" NPT Female

6295-F 100 slpm 25 slpm 1/4" NPT Female

6294-A 4 slpm 0.5 slpm 1/4" Dia. Tube Stub

6294-C 20 slpm 4 slpm 1/4" Dia. Tube Stub

6294-F 100 slpm 25 slpm 1/4" Dia. Tube Stub

6293-A-FM 4 slpm 0.5 slpm 1/4" Face Seal female in_/1/4" Face Seal male out

6293-C-FM 20 slpm 4 slpm 1/4" Face Seal female in_/1/4" Face Seal male out

6293-F-FM 100 slpm 25 slpm 1/4" Face Seal female in/ 1/4" Face Seal male out

6293-A-MM 4 slpm 0.5 slpm 1/4" Face Seal male inlet and outlet

6293-C-MM 20 slpm 4 slpm 1/4" Face Seal male inlet and outlet

6293-F-MM 100 slpm 25 slpm 1/4" Face Seal male inlet and outlet

6293-A-FF 4 slpm 0.5 slpm 1/4" Face Seal female inlet and outlet

6293-C-FF 20 slpm 4 slpm 1/4" Face Seal female inlet and outlet

6293-F-FF 100 slpm 25 slpm 1/4" Face Seal female inlet and outlet

NOTE: Face Seal is VCR® compatible

Please order Matheson Technical Bulletin TB-172 for more information.