Refcomp SP4LF1200 SP4LF120E 12HP Semi-Hermetic Reciprocating Compressor

Designed to protect critical internal components against unexpected system over-pressurization, the SP4LF1200(SP4LF1200) features a factory-fitted internal pressure safety valve built directly into the cast-iron body. The valve automatically opens to bypass gas between the high-pressure discharge manifold and the low-pressure suction chamber when differential limits are breached, preventing shell strain, gasket blowout, or mechanical breakdown during abnormal pressure spikes.

Engineered with high-grade spring steel valve reed plates and a low-clearance volume cylinder head geometry, the 4-cylinder compression block drastically minimizes gas re-expansion losses. This refined gas-flow path optimizes volumetric efficiency under high compression ratios, delivering exceptional cooling capacity and stable mass flow during deep-freezing low-temperature cycles.

The heavy-duty cast-iron sump includes an integrated oil sight glass, magnetic drain plug, and dedicated pocket for a 220W immersion crankcase heater. This layout facilitates clear lubricant level inspection, traps fine metallic wear particles, and ensures effective oil heating during off-cycles to prevent cold-start liquid refrigerant dilution and bearing washouts.