What is a Pressure Reducing Valve?

The function of a pressure reducing valve is to lower the system pressure to a predetermined level. A self-acting pressure reducing valve operates by means of an intermediate medium. The desired pressure on the secondary side is selected as the valve’s set pressure.

Pressure reducing valves are suitable for steam, liquids, and gases.

Pressure Reducing Valve Selection

We assist in selecting and sizing a pressure reducing valve that meets the requirements of the application.

Two techniques can be applied for self-acting pressure reduction.

In the first model, a diaphragm-operated disc is installed on top of the valve, to which pressure is applied through an impulse pipe from the valve’s secondary side. In this case, the valve functions based on the pressure coming through the impulse pipe and the spring built into the valve. The spring force, to which the set pressure is adjusted, tends to open the valve when the pressure from the diaphragm device attempts to close it. This operation is found in ARI-Armaturen and GESTRAN pressure reducing valves.

In the second, slightly simpler model, the valve opening is based solely on the spring force built into the valve and its internal structure. This technique is applied in NIEZGODKAN pressure reducing valves.

Steam and Condensate Usage

If it is a steam pressure reduction station, the expansion steam after pressure reduction must be taken into account and the pipe size increased. We are happy to provide guidelines for pipeline sizing and flow rate management.

In large steam pressure reduction stations, a microturbine can be installed alongside the pressure reducing valve, thereby recovering energy from the pressure reduction.