Gestra’s pressure reducing station provides a complete solution to optimize your steam system.  It includes high quality components with which you can safely and reliably manage saturated or superheated steam.

Steam systems frequently require different steam pressures, in order to supply the correct pressure to the different consumers. As these steam pressures often have to remain constant, steam pressure-reducing stations are used. There are various ways of reducing the steam pressure. The simplest method is mechanical (self acting) pressure reduction without outside energy. The pressure-reducing valves are balanced, single-seated valves that function as proportional controllers without outside energy. Mechanical steam pressure-reducing devices can only be used to a limited extent, however.

If supercritical pressure differences have to be dissipated, if major fluctuations in flowrate may occur, if the accuracy of the secondary pressure is subject to very stringent requirements or the sound pressure level of the valve is problematic with these requirements, pressure controls with electric, pneumatic, or electro-pneumatic actuators are used.

The self-acting reduction of steam pressure functions as follow:

The fluid flows through the valve. This produces a drop in pressure, leading to a reduced pressure downstream of the valve. This pressure level is transmitted into the diaphragm chamber via a pilot line and acts on the actuating membranes. The force produced by the diaphragm opposes the force of the spring. As long as the two forces are balanced, the valve cone remains in position. Deviations and downstream pressure move the cone until the two forces are again in equilibrium. The required reduced pressure is set by adjusting a handwheel. The spindle is sealed by a metal
bellows that also balances the upstream pressure