Bailey 716ESL Safety Relief Valve (EDPM Disc with Lifting Lever – Suitable for Water & Gas Service (not Air))

Features & Benefits

• Resistant to dezincification
• Lightweight, compact, and easy to install and operate
• More durable to damage during installation
• Available in sizes ranging from 1/4" to 2"
• Compliant with BS EN 331:1998 testing standards

Specifications

• UK End Connection: BS EN 10226-2:2005 (formerly BS21 Taper)
• US End Connection: ANSI B1.20.1:1983
• Operator Type: Lever
• Specification: Quarter turn mechanism with PTFE seats and stem seals
• Tested by GL Industrial Services, meeting the essential requirements of BS EN 331:1998

Pressure/Temperature Rating

• -10 to 100 °C at 25 Barg
• 110 °C at 23.5 Barg

Introducing the Reliance Valves Aquasystem Stainless Steel Expansion Vessel, expertly designed for potable water applications. These replaceable membrane expansion vessels are essential for managing excess pressure in water systems as the water heats up and expands. By preventing pressure build-up in both sealed heating systems and cold water systems, these vessels ensure safe operational levels. The internal replaceable membrane safeguards against corrosion and contamination, thereby guaranteeing that the water remains safe for human consumption. Moreover, the design allows for quick and efficient servicing without the need to remove the vessel from its installation.

**Features and Benefits:**

• Robust stainless steel bolted flange to prevent corrosion
• Extra wide membrane opening designed to eliminate noise from restricted flow
• Internal membrane ensures water does not come into contact with the steel shell, preventing internal corrosion
• A comprehensive range available from 2 to 5000 litres, catering to all applications
• All models include a replaceable membrane for easy in-situ servicing
• Pre-charge valve included for topping up air pressure
• Suitable for hot and cold water applications

**Specifications:**

• Capacity: 5000 Litres
• Colour: Red
• Pre-Set Pressure: 4 Bar
• Max Pressure: 10 Bar
• Minimum Temperature: -10°C
• Maximum Temperature: 99°C
• Height: 3350mm
• Diameter: 1500mm
• Water Connection: DN80
• Product Code: XVES050220

**Materials:**

• Shell: Epoxy Coated Steel
• Membrane: EPDM
• Bolted Flange: Stainless Steel

**Standards and Approvals:**

• WRAS approved for models up to 1000 litres
• CE marked in accordance with Directive PED 97/23/EC
• TUV Certified
• Materials for 1000 - 5000 litre models comply with BS 6920

Enhance your water system's efficiency and safety with the Reliance Valves Aquasystem Stainless Steel Expansion Vessel—ideal for both residential and commercial use.

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