Medenus RSP255 Pilot Operated Gas Pressure Regulator & Shut Off Valve

The Altecnic / Caleffi 309 Pressure & Temperature Relief Valve - 309400CST is designed to effectively control and limit the temperature and pressure of hot water in domestic storage heaters. This essential safety valve ensures that water temperatures do not exceed 100°C, preventing steam formation. When the temperature or pressure reaches its set limits, the valve releases a sufficient amount of water into the atmosphere, ensuring that both temperature and pressure return to safe operating levels.

**How It Works:**

The valve features a thermostat compound within the temperature sensor that is submerged in the hot water storage heater. As the temperature increases, the compound expands, moving a thrust pin that activates the obturator, thereby opening the valve. This mechanism is set to initiate opening at temperatures exceeding 90°C. Regarding pressure, the obturator, which is countered by a spring, lifts when the pressure reaches its designated limit, fully opening the outlet. The pressure setting is predetermined based on the system's maximum permissible pressure. As the temperature and pressure decrease, the valve automatically re-closes within the specified tolerances.

**Product Specifications:**

• Size: 1/2"
• Connections: Male x Ø 15 mm with compression fitting for copper pipe
• Materials: DZR
• Medium: Water
• Set Pressure: 10 Barg
• Discharge Rating: 10 kW
• Temperature Setting: 90°C
• Probe Length: 102mm
• Product Code: 309400CST

**Notes:** WRAS approved, CE marked

This high-quality pressure and temperature relief valve is an indispensable component for maintaining the safety and efficiency of your domestic hot water system. Ensure optimal performance and compliance with regulations by choosing the Altecnic / Caleffi 309 Pressure & Temperature Relief Valve.

Introducing the Hattersley Fig 1732M Fixed Orifice Double Regulating Valve (FODRV - Medium Flow), designed for optimum commissioning performance. This premium valve boasts an impressive accuracy of ±5% across all settings, ensuring precise flow regulation tailored to your needs. Its integral fixed orifice design enhances accuracy and simplifies installation, leading to reduced costs through fewer connections. ### Features & Benefits - **Precise Flow Regulation:** Achieve accurate control of flow rates, critical for efficient system performance. - **User-Friendly Operation:** Equipped with a handwheel and a clear numerical indicator for effortless adjustment. - **Integrated Design:** The built-in orifice and test points eliminate the need for separate double regulating valves and metering stations, streamlining your setup. - **WRAS Approved:** Safe for use with potable water, operating effectively at temperatures up to 85°C. - **Consistent Flow Control:** Maintain positive flow regulation at every handwheel setting. - **High Accuracy:** The FODRV ensures flow precision with an accuracy of ±5%, guaranteeing reliable measurement. ### Specifications - **Standards Compliance:** Conforms to BS7350: 1990. - **Operation Mechanism:** Handwheel operated with a numerical indicator for easy reading. - **Design Features:** Includes an inside screw non-rising handwheel and a characterised regulating disc, along with an integral fixed orifice. - **Testing Points:** Supplied with two Figure 631 test points for enhanced monitoring. - **Connection Types:** - End connections are threaded, available in sizes ranging from 1 to 2" taper threaded (BS EN 10266, ISO 7-1). - Sizes 1/2" and 3/4" are compatible with ISO 228 parallel connections. - **WRAS Approval:** This product has earned WRAS approval for quality assurance. ### Pressure/Temperature Ratings **Threaded Ends:** - Rated to BS 7350 PN20 - Maximum pressure: 17.2 bar at 120ºC - Maximum pressure: 20 bar at -10 to 100ºC **Compression Ends:** - 5 bar at 120ºC - 6 bar at 110ºC - 10 bar at 65ºC - 16 bar from -10 to 30ºC - WRAS approval temperature range: -10 to 85ºC Upgrade your fluid system with the Hattersley Fig 1732M Fixed Orifice Double Regulating Valve for reliable performance and cost-effective installation.