Change Over Valve COV30

Switch over between parallel safety valves
without interrupting operation

Product Description

This valve is used if a plant shutdown is impossible or undesirable for process engineering or commercial reasons. With change-over valves, it is possible to switch over between parallel safety valves without interrupting operation, so that maintenance work can be carried out on each safety valve in turn.

Flanged inlet connections are also available on request.



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Technical Information

Technical Information for the Type COV30

  • System Connections
    1” to 1-1/2” BSP, BSPT, NPT, CL150 to CL600 & PN16 to PN100
  • Valve Connections
    ¾” to 1” BSP, BSPT, NPT (with or without orientators), CL150 to CL600 & PN16 to PN100
  • Materials of Construction
    Stainless Steel CF8M/316/1.4401
  • Seal Material
    25% Carbon filled P.T.F.E.
  • Maxium Safety valve Set Pressure
    100.0 bar
  • Temperature Range
    -196°C to 200°C
  • Change-Over Valve Kv
  • Safety Valve Orifice Size
    Up to 18mm (Full Lift Type)
  • Test Certification
    Included - supplied Free of charge


Typically used in the refrigeration industry, however, they are used elsewhere and are suitable for wide industrial applications.

  • Designed in accordance with BS EN 378
  • Pressure drops with 10.0 mm bore SRV in accordance with BS EN 13136
  • Compact and easy-to-use design
  • Seat leakage better than Class V (IEC60534-4)
  • Ventable outlets for safe removal of safety valves
  • Lockable handle (optional padlock available)
  • Impossible to isolate both safety valves
  • Designed for ease of maintenance, and failsafe correct assembly
  • Robust Construction
  • Broad Compatibility
  • Can be fitted with a Bursting Disc
  • Patented Design
  • Can be supplied degreased for oxygen
Safety Champions

Beyond flow control, change-over valves play a crucial role in safety. They act as silent guardians, isolating equipment during maintenance or redirecting fluids in emergencies, preventing equipment damage, and protecting personnel.

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Safety Relief Valves & Change-Over Valves for a wide range of Refrigeration Applications

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The Seetru range of safety valves for refrigeration applications is designed to meet the needs of the refrigeration industry, offering safety valve technology for compressor manufacturers, industrial refrigeration, commercial refrigeration, ice-making systems, and air conditioning. Safety valves are compact and designed with bonded sealing technology and the highest possible sealing performance to comply with the most stringent environmental standards.

We have valves suitable for refrigerants HCFC, HFC, R717 (Ammonia), R744 (CO2)

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