The Model 6290 Series Excess Flow Control Valve is a sensitive excess flow shut-off valve designed to operate with a wide range of inlet pressures. The Excess Flow Control Valve can be installed in any location without affecting performance. The capability of operating up to 3500 psig 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 Control Valve is incorporated within a stainless steel high purity valve. The actuating knob has been designed to manually operate the valve and clearly indicate the relative operating condition as either “Open (Reset)” or “Auto (Shut off).”

Materials of Construction

Wetted
• Body: 316 Stainless Steel
• Seat: PCTFE
• Diaphragm: Elgiloy or equivalent
• Spring: Hastelloy C-22
• Poppet: 316L Stainless Steel

Non-Wetted
• Knob: Anodized Aluminum (red)
• Stem: 416 Stainless Steel (lubricated)
• Cap: 316L Stainless Steel

Specifications

• Inlet Pressure: 10-3500 psig
• Temperature: -10ºF to 150ºF (-23ºC to 66ºC)
• Leak Rate (Inboard):  2 x 10^-10 scc/sec (He)
• Outboard Seal: Metal to Metal
• Finish: 15-20 Ra
• Inlet/Outlet: 1/4" FPT

Instructions, 6290 Excess Flow Valve

Flow Curves, 6290 Excess Flow Valve

Gas Correction Factors