Pressure control valves comprise all spring-actuated valves which feature the required specific procedural parameters such as inlet or outlet pressures or differential pressures, flow rates or other setpoints.
1. Pressure Reducing Valves
Pressure reducing valves reduce a high and frequently fluctuating pressure to an adjustable constant pressure downstream of the valve. A spring keeps the valve open and this closes as the outlet pressure rises.
Vacuum breakers protect vessels and pipelines against vacuum. A vacuum can build up when a system is being drained, when it cools down or when a pump fails. Vacuum control valves are pressure reducing or overflow valves which control pressures below 1 bara.