Resideo DRG Three-Way Mixing Valve

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.

**Product Specifications** - **Sizes Available**: 3/8", 1/2", 3/4", 1" - **Connections**: Screwed BSPP or NPT - **Materials**: - **Nozzle**: Stainless Steel - **Spring Bonnet**: Stainless Steel - **Disk**: Metal - **Joints & Seals**: NBR, FPM, EPDM (varies by model) - **Head Type**: C (Gas-tight cap) - **Compatible Mediums**: Steam, gases, and liquids - **Set Pressure Range**: 0.05 to 500 Barg (depending on size) - **Temperature Range**: -60 to 280 °C For additional variants, including different O-ring and disc materials, NPT connections, orifice sizes, and head types, please refer to our downloadable resources or contact us for further information. Optimise your process safety with our robust pressure relief valves, expertly designed to handle a variety of mediums and conditions.

Introducing the RB Figure 2500 ISO Direct Mount Brass Nickel Plated Full Bore Ball Valve, a high-quality and reliable solution for your fluid control needs. Featuring a brass chrome-plated ball, this valve is equipped with P.T.F.E. seats and P.T.F.E. / FKM / EPDM seals to ensure optimal performance and durability. The end connections are designed with screwed BSP female fittings for easy installation.

Complementing the valve is the Valbia 82 Series Pneumatic Actuator, configured for a minimum pilot air supply pressure of 5.5 Bar g. Its robust rack and pinion design, housed in a hard anodised aluminium body, guarantees reliability. The actuator features blue coated end caps, visual position indication, and 1/8” BSP pneumatic connections, making it user-friendly. With bi-directional open/close travel stops and a maximum air supply pressure of 8 Bar g, this actuator is designed to meet diverse application requirements. It is also ATEX II 2GD T6 approved for safe operation in potentially explosive environments.

Specifications:

• Size Range: ¼” to 4”
• Actuator Options: Double Acting, Spring Return (Fail Close or Fail Open). Also available in stainless steel body and painted finishes.

This fully assembled (Direct Mount) system is function tested to ensure quality and performance. Choose the RB Figure 2500 for a dependable, efficient, and safe solution for your valve and actuator needs.