Controlled Solenoid Valves
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Description
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 fluoridated 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.
Features:
Features:
- Simple and inexpensive installation
- Stabilizes working conditions and eliminates pressure pulsations during opening after defrosting
- Screw thread pilot valve fitting
- Only one signal required for both pilot solenoid valves
- Provides safety against pressure "shocks" as the valves can only open fully when differential pressure is less than 1.5 bar
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Controlled Solenoid Valves