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LESER IN THE UNITED KINGDOM

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Solutions for the Refrigeration Industry

Safety Valves  /  Change-Over Valves  /  Liquid Level Gauges

We are Seetru in India

group image including a seetru level gauge and safety valves

Essential components of any refrigeration system

Safety valves, change-over valves, and liquid level gauges are essential components of refrigeration systems, ensuring safe and efficient operation.  Without them, the system would be at risk of failure, which could result in damage to the system, injury to personnel, or environmental contamination.  By using our high-quality refrigeration valves and gauges, you can be confident that your system is protected and operating at its best.

Quick Links:  

 

Safety Relief Valves    |    Change-Over Valves    |    Liquid Level Gauges

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Safety Valve Enquiry Form    |    Level Gauge Enquiry Form 

Safety Relief Valves

Safety Relief Valves suitable for the following industries/applications:

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  • Compressor manufacture

  • Industrial refrigeration

  • Commercial refrigeration

  • Ice making machinery

  • Air conditioning

  • R744 CO2 refrigeration

  • R717 Ammonia refrigeration (stainless steel valves)


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.

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


The models that use bonded elastomer sealing are leak tested to better than 10-5 mbar litres/sec on Helium. This is equivalent to a leakage rate of less than 1oz in ten years. Suitable for operating temperature in the range -30 °C to +200 °C.

Refrigeration safety valves

 Safety Relief Valves for Refrigeration

Inline Seetru safety valve in brass. 319 atmospheric safety valve

Type 319

  • Design: Atmospheric Discharge

  • Materials: Brass

  • Inlet Connections: 3/8” to 1/2” or 7/8” x 14UNF (depending on bore size)

  • Pressure Range: 13.5 to 55.2 bar

enclosed safety valves in bronze and brass. type 636 for refrigeration

Type 636 - Refrigeration

  • Design: Enclosed Discharge

  • Materials: Bronze

  • Inlet Connections: 3/8” to 1 1/2” (depending on bore size)

  • Pressure Range: 6.6 to 55.2 bar (depending on bore size)

three stainless steel safety valves for refrigeration.

Type 646 Refrigeration

  • Design: Enclosed Discharge

  • Materials: Stainless

  • Inlet Connections: 3/8” to 1 1/2” (depending on bore size)

  • Pressure Range: 6.6 to 55.2 bar (depending on bore size)

single stainless steel safety valve. enclosed discharge safety valve

Type 356 & 346

  • Design: Enclosed Discharge

  • Materials: Bronze or Stainless Steel

  • Inlet Connections: 3/8” to 3/4”

  • Pressure Range: 0.83 to 30.76 bar

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Type 329

  • Design: Enclosed Discharge

  • Materials: Bronze or Stainless Steel body

  • Inlet Connections: 3/8” to 3/4” Threaded

  • Pressure Range: 53.0 to 370.0 bar

stainless steel safety valve with flanged connections

10mm Bore 94610 Flanged

  • Design: Enclosed Discharge

  • Materials: Stainless Steel

  • Inlet Connections: DN15 (1/2), DN20 (3/4”) or DN25 (1”) flange – DIN EN1092 and ANSI flanges are available

  • Pressure Range: 0.3 to 28.0 bar

stainless steel safety valve with flanged connections

15mm Bore 94615 Flanged

  • Design: Enclosed Discharge

  • Materials: Stainless Steel

  • Inlet Connections: : DN15 (1/2), DN20 (3/4”) or DN25 (1”) flange – DIN EN1092 and ANSI flanges are available

  • Pressure Range: 0.3 to 28.0 bar

Change-Over Valves

Change-over valves allow operators to switch between two or more refrigeration systems without interrupting operation. This is useful for maintenance purposes, as it allows one system to be taken offline for servicing while the other system remains in operation.

Change-Over Valves for the Refrigeration Industry

Change-over valves
Seetru change-over valve, type cov10

Change-Over Valve COV10

  • Materials of Construction: Stainless Steel

  • Seal Material: P.T.F.E

  • Maximum Safety valve Set Pressure: 75.0 bar

  • Temperature Range: -196°C to 200°C

Seetru change-over valve, type cov13

Change-Over Valve COV13

  • Materials of Construction: Stainless Steel with Mild Steel or Stainless Steel Internals

  • Seal Material: Elastomer / P.T.F.E

  • Maxium Safety valve Set Pressure: 65.0 bar

  • Temperature Range: -30°C to 200°C (subject to seal material)

Seetru change-over valve, type cov30

Change-Over Valve 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

  • Maximum Safety Valve Set Pressure: 100.0 bar

  • Temperature Range : -196°C to 200°C

Liquid Level Gauges

Liquid level gauges allow operators to monitor the level of refrigerant in a refrigeration system. This is important for ensuring that the system has enough refrigerant to operate efficiently and to prevent the system from running dry.

Liquid Level Gauges for use with Refrigerants

level gauges for refrigerants
Refrigeration Reflex liquid level gauge

Type G33 Refrigeration Reflex Gauge

  • Maximum Temperature: 100°C

  • Maximum Pressure: 25 bar

  • Valve Materials: Brass Zinc Plated Mild steel
    Connections: BSP and NPT Threaded connections

  • Seal Materials: Nitrile (NBR) / Viton (FKM) / EPDM / Neoprene

  • Lengths: To suit requirements (Minimum 216mm / Maximum 3246mm)

seemag magnetic liquid level gauge

The Seetru G35 Seemag Magnetic Gauge

  • Maximum Temperature: 180°C

  • Maximum Pressure: 22 bar

  • Connections: Threaded / Flanged / Stub pipe for welding

  • Lengths: To suit requirements (Minimum 500mm Maximum 5000mm)

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