Altecnic / Caleffi Pressure Relief Valve 3/4

Altecnic / Caleffi Pressure Relief Valve 3/4" Loose Nut Connection x 1/2" F 6 Bar - A311501CST

The Altecnic / Caleffi Relief Valve - Nut Inlet - A311501CST is designed for use in domestic hot water systems, providing essential protection for hot water cylinders and heating systems, including boilers and associated components. This relief valve is carefully selected based on the required set pressure to ensure optimum performance. As pressure rises within the system, the valve opens when the discharge pressure threshold is met, releasing excess pressure into the atmosphere. This critical function helps prevent hazardous pressure levels that could endanger the boiler, hot water storage cylinder, and personnel in the surrounding area.

**Specifications**

**Size:** 3/4" x 1/2" **Connections:** Loose Nut Connection Inlet x BSP Female Outlet **Materials:** Brass **Medium:** Air and Water **Set Pressure:** 6 Barg **Temperature Range:** +5 to +110 °C **Product Code:** A311501CST **Notes:** Compatible with 533002 CST and 533003 CST Inlet Control Groups, MK2 Caleffi Multibloc, and Range Tribune HE (Caleffi Control Gear) cylinders.

Optimise your heating system's safety by choosing the Altecnic / Caleffi Relief Valve - A311501CST for reliable and efficient performance.

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Berluto Float Valves

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                        Berluto float valves are exceptionally robust and dependable. Established in 1920 by Jean Bergner, who patented his innovative design in 1917, Berluto began with valves intended for toilet flush systems. Today, our float valves are utilised across a wide range of applications. They are employed globally in sectors such as agriculture and industry for filling separation or storage systems, as well as for regulating the levels in poultry drinking troughs, humidifiers, car washes, booster stations, and pond constructions, among others. Our technology remains at the forefront of innovation, and our float valves are even implemented in advanced fields like aircraft manufacturing. Designed for reliability, our float valves regulate inflow and water levels without the need for auxiliary power or delicate sensors. True to our ethos: simply install and forget! Additionally, in most of our valve types, the only genuine wear parts—the nozzle and seal—can be easily replaced when necessary, particularly after exposure to aggressive or abrasive media. This level of serviceability is far superior to that offered by competing brands. Regardless of the type of media you require or the flow rates involved, we provide the most suitable float valve for your specific needs. Our range includes options made from brass, red bronze, or stainless steel, featuring NBR or FKM seals, along with PE, copper, or V4A floats. Choose Berluto for reliable, high-quality float valves tailored to your industry requirements.

Flowstar UK Ltd

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.