55000 General Solenoid Range, 2 Way Pilot Assisted, Normally Closed. The 55000 Series are a range of general solenoids featuring a large range of BSP connection threads, orifice sizes, pilot assisted valves. They all have brass bodies and a range of coil voltages, 24V a.c., 110V a.c., 230V a.c. The electrical connection is via a DIN plug or Amp tag, wiring looms can be supplied to suit application. They can be used with Air, Water, Oil <50oC St and Steam at temperatures form 0 to 120oC.