Altecnic / Caleffi 312 Series Safety Pressure Relief Valve 1/2" M x 15mm 4 Bar - 312405CST

The Altecnic / Caleffi 312 Safety Valve - 312405CST is essential for domestic hot water systems, providing vital protection for hot water cylinders and heating systems, including boilers and other components. This safety valve is meticulously selected for its specific set pressure. As system pressure increases, the valve activates once the discharge pressure is reached, releasing excess pressure into the atmosphere. This action safeguards both the boiler and hot water storage cylinder, ensuring safe operational conditions for personnel nearby.

Specification

Size: 1/2" x 15mm
Connections: BSP Male Inlet
Materials: Brass
Medium: Air and Water
Set Pressure: 4 Barg
Discharge Flowrate: 178.2 kg/hr
Max Boiler Rating: 103.3 kW
Temperature Range: +5 to +110 °C
Product Code: 312405CST
Notes: WRAS approved, CE marked

The Altecnic / Caleffi 312405CST Safety Valve is perfect for ensuring compliance with safety standards in your heating systems, making it a smart choice for any domestic hot water setup.

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### Product Specifications **Sizes Available:** DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80 **Connections:** Flanged PN25 Inlet x Flanged PN25 Outlet **Materials:** - Body / Bonnet: Brass (up to DN32), Cast Iron (from DN40 onwards) - Disk: Gunmetal - Joints & Seals: Diaphragm made from NBR, Seals made from NBR **Medium Compatibility:** Suitable for gases and liquids such as drinking water, neutral non-viscous fluids, compressed air, nitrogen, and non-combustible gases. **Note:** Not suitable for steam. **Inlet Pressure (Maximum):** 25 Barg **Outlet Pressure Range:** 0.5 to 9 Barg **Cv Range:** **Temperature Rating:** Maximum 100 °C **Approvals:** Compliant with PED 97/23/CE category I **Additional Features:** - Built-in gauge ports - Integral strainer - Minimum pressure drop from inlet to outlet: 1 Barg For further assistance, please utilise our sizing calculator located in the **TECHNICAL INFO** section of the menu bar at the top of this page. Optimise your system's performance with our reliable valves, designed to meet a variety of industrial needs.

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Flowstar (UK) Ltd

Wiltshire Road, Kingston-upon-Hull, East Riding of Yorkshire, HU4 6PA, United Kingdom

Flowstar (UK) Ltd is a leading global supplier of safety, relief, and reducing valves. With strong partnerships across major manufacturers, we deliver precise, reliable valve solutions tailored to your needs. Email enquiries to sales@flowstar.co.uk or call us on +44 (0)1482 601030.

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