NABIC 500T Combined Pressure & Temperature Relief Valve

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.

Features & Benefits

• Resistant to dezincification
• Lightweight, compact design for easy installation and operation
• Enhanced leak protection
• Greater durability during installation
• Available in sizes ranging from 1/2" to 2"
• WRAS approved for use with hot and cold water systems up to 85°C
• Compliant with BS EN 13547

Specifications

• UK End Connection: BS EN 10226-2:2005 (formerly BS21 Taper)
• US End Connection: ANSI B1.20.1:1983
• Operator Type: Lever
• Specification: DZR Brass (CW602N) Body Ball Valve, constructed in accordance with BS EN 13547, featuring a two-piece design, floating stainless steel SS304 ball, anti blow-out stem, PTFE seats, threaded ends, and PN25 rated
• Suitable for Group 2 Gas and Group 1 and Group 2 Liquids as defined by the Pressure Equipment Directive 2014/68/EU, as amended
• Not suitable for Group 1 Gases or unstable liquids.

Pressure/Temperature Ratings

• Operating temperature range: -10 to 100°C with a pressure rating of 25 Barg
• Operating temperature of 120°C with a pressure rating of 21.8 Barg

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.