Changeover / Selector Valve

The SchuF changeover valve has seen reliable service in several industries over the past 40 years. Their major use is with dual safety relief valves.

Tandem changeover valve

Tandem chaneover valve - shown here without the safety relief valves

They are widely used in Plastic and Polymer, Offshore, and Refining industries to handle process media.

Changeover Valve Applications

Changeover valves are a Switchover Valve, switching flow from one pipeline to another. They are sometimes referred to as "selector" valves. Changeover valves are well suited to applications where mandatory pressure relief devices (rupture discs and relief valves) are installed as dual devices.

The design of the valve ensure that at least one of the two pressure relief devices is always in service and full relief flow is guaranteed during changeover.

Changeover Valve

Other applications include:

# switching from one production line to another,

# selecting to and from dual filtration systems,

# selecting to and from multiple heat exchangers,

# proportioning between two sources or terminals, refluxing or dumping, or

# manifolding where total shutoff of media flow is dangerous, offensive, or produces process stoppage

Characteristics of SchuF Changeover Valves

Available as a standard changeover valve, a vacuum version and as a ditch valve
Shut off both valve outlets at the same time is impossible
Deadspace free
Temperature ratings up to 700 degrees C
Suitable for pressure rating of ASME 2500 or high vacuum
Extremely low leakage (TA Luft) to atmosphere (with stuffing box, or bellow sealing)
Cleaning in service through flushing port(s)
Actuation by hand, pneumatic, or electrical
Can be partially or fully jacketed.
Can be combined with Multiport valves
High level of customisation is possible