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Pilot Operated Relief Valve with Vacuum Breaker

Model 1662A

Pilot Operated Relief Valve with Vacuum Breaker

The Groth Model 1660A Pilot-Operated Relief Valve with Pipe-Away feature is used on liquid storage tanks and other process vessels or systems to prevent structural damage due to excess internal pressure or vacuum. The pilot-operated relief valve has two principal advantages over standard types of relief valves: 1) it is bubble tight to set pressure, and 2) it is fully open at less than 10% above set pressure. These characteristics permit an operating pressure nearer to the maximum allowable working pressure of the tank. High operating pressures reduce evaporation and total venting volume, thereby reducing product loss and cost of processing emissions.

Specifications

Size: 2" (DN 50) through 12" (DN 300)

Material: Standard body materials are carbon steel, stainless steel, aluminum

Pressure: from 2.0* InWC to 15 psig

Vacuum: from 7.0 InWC to 12 psig

Certification: ATEX and PED Approval

Temperature: Supply Media Temperature range from -320° F to 300° F

Features

PILOT OPERATED
• Ease of precision settings
• Only the pilot needs to be set
• Remote pilot sensing option allows the pilot to sense the true system pressure
• Remote or manual blowdown available

EXTRA TIGHT SEAL
• Main valve remains tight to set pressure

FULL FLOW
• Full open at 10% overpressure

SNAP-ACTION OR MODULATING ACTION
• Modulating action conserves product since valve opening is proportional to overpressure.
• Noise is reduced since the valve only opens fully when required.

SOFT SEATED
• Soft seats seal tight to conserve product and minimize valve wear which improves reliability

TOP ENTRY
• Reduces maintenance costs since the valve can be completely serviced without removal from its mounting

Options

• 150# ANSI, PN10, PN16, JIS drilling classes available
• Pilot exhaust piped to discharge header
• Field test connection
• Manual blow down
• Conical film seat pallet
• Remote sense pickup
• Pilot supply filter

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