667 SERIES RELIEF VALVE

Maximum Operating Pressure — 250 psi
Maximum Operating Temperature — 180°F
Maximum Flow Rate — 4 GPM

Design Considerations

The 667 Series Relief Valve incorporates a guided piston and large flow area design for full flow with minimum pressure loss. The 667 Series Relief Valve is available with a T-Style Adjustment Handle or a Screw Slot with Wire Lock-Out Stop Nut. The 667 Relief Valve is available with a choice of two spring pressure ranges to 250 psi and can be used in systems with more than one outlet.

Options

Material Options	Brass Body, End, Piston, Lock Nut and Adjustment Screw, 302 Stainless Spring
Seal Options	Buna-N, Ethylene Propylene, Fluoroelastomer (Viton®)
Inlet Options	1/4 Male NPT
Bypass End Options	1/4 Female NPT
Spring Options	5 - 50 psi – Low 25 - 250 psi – High
Handle Options	T-Handle Screw Slot Lock Out

Example of how to order

Inlet End
1/4 MNPT

Bypass End
1/4 FNPT

Seal
Buna-N

Spring
5-50 Low

Handle
T-Handle

SMC Part Number: REL 667R-4M4F-B,5-50, T-HDL

SMC Part Numbers are a description of the relief valve Seal Material, Sping Size and Handle
Example: REL 667R-4M4F-B,5-50, T-HDL = Buna-N Seals, 5 to 50 psi Spring, T Handle

"Printer-Friendly" Version