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GPK, GPB, GPS and GPSS
Air-Loaded Pressure Reducing Valves

1/2 - 4" Valve Sizes End Conn.: THD, SWE, BWE, RF
ANSI CL 125 - 300
Body Mat'l: Cast Iron (GPK), WCB (GPS), CF8M (GPSS), Bronze (GPB)

Leslie GP Series valves are air-loaded versions of the Super G Series valves. They provide all the advantages inherent in the Super G Series and allow set point changes in seconds with the adjustment of a simple air loader. These valves can be set remotely from an air loading panel. Combined with the Leslie PMC-1 controller, the GP series valve provides a temperature control loop with built-in cascading action for faster, more stable response to load changes. The packless, self-contained design provides low hysteresis and inherently "leakless" performance.

GPAK Regulators for "Hard-to-Hold" Air, Gas and Vapor 

1/2 - 4" Valve Sizes End Conn.: THD, RF
ANSI CL 125 - 250
Body Mat'l: Cast Iron

Leslie Series GPAK regulators are ideal for air, butane, CO, helium, methane, nitrogen, natural and other gases. The principle of operation is the same as the GP Series, enhanced by several special service features. The packless construction and resilient trim give bubble-tight shutoff on gases. This minimizes costly waste of industrial gases due to valve seat or packing leakage.

GPKP-1 Steam-Piloted, Self-Contained
Pressure Reducing Valves

1/2 - 4" Valve Sizes End Conn.: THD, RF
ANSI CL 125 - 250 Body Mat'l: Cast Iron

Leslie GPKP-1 valves feature a unique patented dual diaphragm sensing chamber that provides unparalleled control, accuracy and stability in one self-contained package. Large pilot clearances are far less subject to fouling problems, non-continuous bleed results in less direct carryover through the pilot assembly, and the constant-gain pilot makes for unmatched performance accuracy throughout the entire operating range. A single Leslie GPKP-1 can be used in many applications where competitive designs must use multiple regulators in double reduction and 1/3-2/3 installations.

GPS-1EP External Steam Piloted Pressure Reducing Valve

1/2 - 4" Valve Sizes End Conn.: THD, RF
ANSI CL 150-300 Body Mat'l: WCB

The Leslie GPS-1EP features the GPS-1 regulator along with a VPS external pilot. The pilots have inter-changeable springs for 3-20, 5-50, 10-100 and 20-150 Psig pressure ranges.