Solenoid Valves 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.

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