Hattersley 971G PN16 Butterfly Valve - Gearbox Operated

Refrigeration check valves are essential non-return valves utilised in refrigeration and HVAC systems to regulate the flow direction of refrigerant and prevent backflow, which can potentially damage compressors or impair system efficiency.

Specifications

Sizes: Ranging from 1/4" to 14" (varies by type)
Connections: Available in Flanged, Screwed, Butt Weld, and Solder types
Materials: Constructed from Steel or Stainless Steel
Medium: Suitable for glycol-based cold brine refrigerants as per EN 378 p. 1, including NH3, R134a, R290 (propane), R507, and blends with refrigerant oil, accommodating neutral, gas, and liquid media
Pressure Rating: PS 25, PS 40, PS 63
Temperature Range: From -20 to +150 degrees Celsius Max
Design: Notes:

Enhance the reliability and efficiency of your refrigeration system today with our high-quality refrigeration check valves. Perfect for a variety of applications, these valves are designed to ensure optimal performance and longevity.

The NABIC 542L Pressure Relief Valves are designed for applications where pressure tightness is essential on the discharge side of the valve. These valves are perfect for pump relief, bypass relief, outdoor installations, and handling flammable fluids. Constructed from robust gunmetal, the NABIC 542L features top-guided copper alloy components, a chrome vanadium spring, and PTFE-to-metal seating. O-ring seals provide excellent pressure tightness at both the cover and cap joints. Available enhancements include stainless steel springs, high-pressure versions, and a Viton seat design. All NABIC Valves come with an industry-leading five-year guarantee, ensuring reliable performance and peace of mind.

Specifications

Sizes: 1/2" (DN15), 3/4" (DN20), 1" (DN25), 1.1/4" (DN32), 1.1/2" (DN40), 2" (DN50), 2.1/2" (DN65), 3" (DN80) Connections: Female BSP Inlet x Female BSP Outlet Materials: Gunmetal Body, Chrome Vanadium Spring, PTFE to Metal Seating Set Pressure: 1.0 to 10.5 Barg (DN15 to DN25), 0.3 to 10.5 Barg (DN32 to DN80) Temperature Range: -20°C to 195°C Max Note: We set and test the valves to your required set pressure prior to shipping.

The Altecnic / Caleffi 309 Pressure & Temperature Relief Valve - 309473CST is designed to effectively control and limit the temperature and pressure of hot water in domestic storage heaters. This essential safety device prevents water temperatures from exceeding 100°C, thereby eliminating the risk of steam formation. When the system reaches predetermined pressure or temperature thresholds, the valve discharges a sufficient amount of water into the atmosphere, ensuring that both temperature and pressure are maintained within safe operating limits. The valve's mechanism operates as follows: - **Temperature Control:** As the temperature in the storage heater rises, the thermostat compound within the temperature sensor, which is submerged in hot water, expands. This expansion causes a thrust pin to move, actuating the obturator and opening the valve. The valve is set to activate at temperatures exceeding 90°C. - **Pressure Control:** When pressure limits are reached, the obturator, which is opposed by a set spring, lifts and fully opens the outlet. The pressure setting is specifically configured according to the maximum allowable pressure within the system. As temperature and pressure subside, the valve automatically re-closes within designated tolerances.

Specifications

Size: 1/2"
Connections: Male x Ø 15 mm with compression fitting for copper pipe
Materials: DZR
Medium: Water
Set Pressure: 7 Barg
Discharge Rating: 10 kW
Temperature Setting: 90 degC
Probe Length: 97mm
Product Code: 309473CST
Notes: WRAS approved, CE marked