The housing of water valves from Parker are made of brass and can have NBR or Viton membrane and pilot sealing. The Parker Lucifer valves need a minimum inlet pressure of 0.3bar and the maximum differential pressure is 10 or 16 bar. The Parker Scem ranges are equipped with NBR or Viton membrane and their pressure range is 0.1...20 bar (up to 1") or 0.1... 10 bar at higher sizes (from 5/4" up to 3"). Both ranges have normally closed (NC) and normally open (NO) versions.
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