Gas Operated Solenoid Valve Type SPML

        SPML Gas Operated solenoid Valves 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 recirculation, 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/vapour), Pressure-equalising lines, Bypass lines.


Gas operated Solenoid valve type SPMLX two-step on/off

        SPMLX are 2-step servo-controlled main valves with screwed-on pilot solenoid valves. SPMLX valves use an external pressure source for opening (which means that no differential pressure across the SPMLX valve is required). SPMLX are used in suction lines for the opening against high differential pressure, e.g. after hot gas defrost in large industrial refrigeration systems with ammonia or fluorinated refrigerants. SPMLX opens in two steps: Step one opens to approx. 10% of the capacity, when the pilot solenoid valves are activated. Step two opens automatically after the pressure differential across the valve reaches approximately 1.5 bar. Replaces SPML with bypass solenoid valve, 2 signals and one timer. Stabilizes working conditions and eliminates pressure pulsations during opening after defrosting Provides safety against pressure "shocks" as the valve can only open fully when ∆p < 1.5 bar.

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