Bailey 707MD Safety Relief Valve Female x Female (Metal Disc with Dome Top – Suitable for Steam & Liquid Service)

The Altecnic / Caleffi 313 Relief Valve with Gauge - code 313530, is an essential component for domestic hot water systems and heating systems. It serves to protect the hot water cylinder and boiler, ensuring optimal performance and safety. This relief valve is engineered to activate at a predetermined set pressure. As the pressure builds within the system, the valve opens and discharges excess pressure into the atmosphere, thereby preventing potentially hazardous pressure levels that could endanger the boiler, hot water storage cylinder, or personnel nearby. This model is supplied complete with a pressure gauge for added convenience.

Product Specification:

• Size: 3/4" x 3/4"
• Connections: BSP Female Inlet x BSP Female Outlet
• Materials: Brass
• Medium: Air and Water
• Set Pressure: 3 Barg
• Discharge Flow Rate: 142.1 kg/hr
• Max Boiler Rating: 82.5 kW
• Temperature Range: +5 to +110 degC
• Product Code: 313530
• Certification: WRAS approved, CE marked, pressure gauge included

Ideal for ensuring the safety and efficiency of your heating systems, the Altecnic / Caleffi 313530 Relief Valve is a reliable and crucial addition to any plumbing installation.

This unit features a sensor with all electronics integrated into a single unit, designed to easily connect to your equipment. It screws directly into the body of the flow meter and delivers a 4-20 mA signal through a connector, making it compatible with instruments such as PLCs, computers, flow controllers, data loggers, and local displays.

The AURA EXT series is meticulously engineered for the control of gases and liquids under pressure in demanding environments, withstanding process temperatures of up to 500°F (260°C). Ideal for elevated-temperature applications, the EXT series delivers reliable performance without sacrificing precision or durability. At its heart, the EXT features AURA’s innovative encapsulated seat design, which consolidates multiple moving parts into a single assembly. This advancement reduces maintenance needs, minimises potential failure points, and enhances long-term reliability. The seat is safeguarded by a 10-micron, 360° filter, which significantly improves impurity removal compared to standard pressed-in disks. Unlike traditional regulators that only filter at the pipeline port, the EXT ensures protection against harmful particles from all inlet ports. AURA's proprietary machining process achieves ultra-smooth surface finishes ranging from 4–25 Ra, which helps to minimise corrosion and extend service life. With its minimal internal volume, the EXT requires less purge gas, thus enhancing efficiency in critical operations. Each EXT regulator is fully assembled with all fittings installed, helium leak tested at 100%, and subjected to rigorous flow and function testing to guarantee reliable performance in tough applications across the globe. For use in aggressive chemical environments, the EXT can be equipped with Dursan® LS inert coating technology, offering superior resistance to acidic and caustic substances—a solution often more effective than exotic alloys. By integrating heat-resistant engineering with advanced corrosion protection, the AURA EXT series presents a flexible, durable, and trustworthy solution for high-temperature pressure control applications.