3/2-way valve, pneumatically operated, normally closed

The pneumatic valve is controlled by applying a pilot pressure at connection 12. The flow passes freely from 1 to 2. By stopping the signal the valve is set back to its starting position through the use of a return spring. Connection 1 is shut.

This valve is derived from a configurable 3/n way valve. You find this valve in the component library Frequently used Way Valves, under the Library menu.

Adjustable parameters

Designation Range Default value
Desired position 0 ... 4 0
Standard nominal flow rate 0.1 ... 5000 l/min 60
Positioning time 1e-4 ... 10 s 0.02
Reset time 1e-4 ... 10 s 0.03
Acting forces
Designation Range Default value
Minimum voltage 0.1 ... 300 V 20
Electrically left at U_min 0.01 ... 100 N 70
Electrically right at U_min 0.01 ... 100 N 70
Mechanically left 0.01 ... 100 N 100
Mechanically right 0.01 ... 100 N 100
Counteracting forces
Designation Range Default value
Physical spring force 0.01 ... 100 N 20
Minimum force 0.01 ... 100 N 15
Min. pilot control force 0.01 ... 100 N 15
Effective areas
Designation Range Default value
Left 0.01 ... 100 cm2 1
Right 0.01 ... 100 cm2 1
Pilot control left 0.01 ... 100 cm2 1.3
Pilot control right 0.01 ... 100 cm2 1.3
air spring left 0.01 ... 100 cm2 0.5
air spring right 0.01 ... 100 cm2 0.5

Failure models

Failure model Description
Piston blocked The valve can not change its switching position.
Leakage between 1 and 3 An internal leakage between the connectors 1 and 3 occurs. The value of the leakage is adjustable.
Parameter
Designation Range Default value
Standard nominal flow rate 0 ... 5000 l/min 1000