Manometer; Function; Pressure Reducing Valve; Pressure Holding Valve - GF 582 Manual De Instrucciones

Instruction manual

4.3 Manometer

15
15
Indication of flow direction
16 Manometer socket
If pressure reducing valve type 582/pressure retaining valve type 586 is a
manometer version, then the manometer is already fitted at the factory.

5 Function

5.1 Pressure reducing valve

On the side of the valve outlet, the pressure acts via the diaphragm on the adjustable spring.
A balance of forces is established via the preloaded spring, which is set with the adjusting
screw at the valve. If the outlet pressure increases above the specified value, the piston is
lifted against the spring force. The valve closes, and the outlet pressure is reduced. If the
outlet pressure decreases below the value, the piston is pushed down by the spring
resistance. The valve begins to open, until the balance is reached again. Independent of an
increasing or decreasing inlet pressure, the outlet pressure remains constant to the greatest
possible extent, because it is not directly related to the inlet pressure.

5.2 Pressure holding valve

The desired pressure in the valve inlet pipe is set by the adjustable spring force. If the inlet
pressure rises above the set value, e.g. due to an over capacity of the pump, the valve piston is
lifted against the spring force. Consequently, the valve opens, and there is a reduction of
pressure in the outlet. If the pressure decreases in the valve inlet pipe, the spring resistance
pushes the piston down in the direction of the valve seat and closes, as soon as the inlet
pressure sinks below the preset spring tension. In this way, a constant pressure in the supply
line is ensured.
16
17
17
Manometer adaptor (optional)
18 Manometer
Function
18
31