Gas-operated valve type spml from manik engineers are servo-operated main valves with screwed-on pilot solenoid valves. Spml valves use an external pressure source for opening, which means that no differential pressure across the spml valve is required. This makes the valve especially suitable for low-pressure suction lines. The valves can be used in all types of refrigeration systems: direct expansion; pump re-circulation, natural circulation, within their specified pressure and temperature ranges. Spml valves can be used for fluorinated refrigerants [r 22, r 134a, r 404a, r 12, r 502, etc] or ammonia [r 717]. Especially suitable for systems where low-pressure drop is required. Spml remains open even though the pressure drop across the valve is 0 bar. Spml pilot-operated solenoid valves can be installed in suction lines, return lines [liquid/ vapor], pressure-equalizing lines, bypass lines, etc.
