The regulators employ a solid piston and balanced poppet for excellent performance and longer life. The solid piston design is reliable for a broad range of demanding applications and is impervious to a wide range of lubricating oils and greases. Unlike diaphragms, the solid piston resists rupture, cracking or tearing under pressure, constant flexing or high cycle rates. It is impervious to most chemicals, provides accurate control, and assures smooth, uninterrupted operation. Fast reverse flow capacities. This allows for installation where dual pressures are required. Two gauge ports are provided and a pressure gauge is included. Maximum operating pressures are 250 PSI primary and 2 to 125 PSI secondary.