Applications:
Aerospace, Defense Products, the nuclear industry, Shipbuilding, petrochemical, power equipment, medical equipment, industrial furnaces, drying equipment, firefighting equipment, HVAC, cleaning equipment, electroplating, painting, filling measurement, food industry, water treatment systems and so on.
Technical parameters:
Principle Structure: Diaphragm type
Medium: water, liquid, light oil, liquid gas
Electrical connection: terminal box, cable-lead
Protection class: DIN DIN40050 (IP65)
Explosion-proof grade: ExdIICT5
Operating factor: 100% ED

How it works:
1.step direct-acting:
   Normally closed type: solenoid valve, solenoid coil electromagnetic force generated from the seat to lift the pieces off, valve open; power, the electromagnetic force disappears, the spring force to close the piece down on the seat, the valve closes.
Normally open type: normally closed operation with the opposite direction.
2.Pilot:
   Normally Closed: When the solenoid coil is energized, the electromagnetic force open the pilot hole. The pressure chamber on the rapid decline in the vicinity of the piston and seals on the formation of a high pressure low. This pressure difference push the piston and seals from the valve seat on the lift. Valve opening; coil energized, the spring force pilot hole closed, the bypass valve inlet pressure into the hole on the chamber quickly, in the vicinity of the piston and seals compete on the formation of a low pressure difference, thus promoting the piston and seals pressing down on the seat, the valve closes.
Normally open type: normally closed operation with the opposite direction.

Overall structure: