MODEL | 967 |
Location
5.01 | Compressed air reservoir |
7.01 | Overflow valve with return flow |
W32.33-2093-11
The overflow valve with return flow (7.01) is attached to the compressed air reservoir (5.01) of the level control system.
The installation location may vary depending on the vehicle model.
Task
The task of the overflow valve with return flow (7.01) is to keep the pressure in the air suspension circuit constant at a set specified value.
Body
Components / pneumatic connections |
a | Hole |
b | Diaphragm |
c | Adjuster spring |
d | Piston |
e | Hole |
f | Check valve |
1 | Energy supply |
2 | Energy outflow |
W32.33-2071-11
Function
When compressed air is applied to the overflow valve with return flow (7.01) at the energy inflow (1), the compressed air passes through the bore (a) under the diaphragm (b) which is pushed onto its seat by the adjuster spring (c) and piston (d). When the overflow pressure is reached, the force of the adjuster spring (c) is overcome so that the diaphragm (b) is lifted from its seat and the bore (e) is released. The compressed air is fed to the energy outflow (2) and to the consumer connected there. If the air pressure at the energy inflow (1) drops below the overflow pressure, the adjuster spring (c) pushes the diaphragm (b) back onto its seat. The compressed air is now no longer fed from the energy inflow (1) to the energy outflow (2). If the air pressure at the energy inflow (1) continues to drop, the check valve (f) opens due to the higher pressure at the energy outflow (2) and the compressed air flows from the energy outflow (2) to the energy inflow (1).