Altecnic / Caleffi Pressure Relief Valve with Circlip Connection 6 Bar - F0000412

**FSDIFDW Double Way Rupture Discs: High-Performance Pressure Relief Solutions** The FSDIFDW Double Way Rupture Discs are expertly engineered composite conventional discs, constructed from four essential components: a slotted, perforated metal section, a seal membrane (primarily made from PTFE, but also available in various metallic and non-metallic materials), a protective layer, and a calibration ring. Designed for installation between flanges, these discs excel in static applications involving both gases and liquids at low pressures. Responding to excessive pressure, the FSDIFDW rupture discs achieve full opening in mere milliseconds, making them an ideal choice for valve protection. For applications requiring vacuum or counter-pressure protection, support options are also available. These composite rupture discs can effectively provide simultaneous protection against both pressure and vacuum scenarios. **Specifications** - **Sizes:** Available in 2" (DN50) to 40" (DN1000) - **Materials:** Stainless steel, Alloy 201, Alloy 400, Alloy 600, Alloy 625, Alloy C276, Titanium; Membrane options include PTFE, PFA, Stainless steel, and Aluminium - **Rupture Pressure:** Ranges from 0.5 to 5 bar g (dependent on material and diameter) - **Krl:** - **Tolerance:** ± 5% to ± 20% - **Temperature Resistance:** Membrane options in PTFE/PFA withstand up to 265°C, with some materials performing up to 480°C (depending on membrane type) - **Operating Margin:** Up to 70% - **Vacuum Support:** Not available - **Fragmentation:** None (membrane only) - **Use Under Valve:** Yes - **Corrosion Resistance:** Good; can be enhanced with a PTFE membrane - **Linings:** Available - **Container Type:** Installed between flanges - **Rupture Sensor Options:** Electrical, Magnetic, Inductive, Optical - **PED Certification (CE Stamp):** Available - **ATEX EX II 2 GD Certification:** Available For more information or to request a quotation, please download our Rupture Disc Request Form and send the completed document to sales@flowstar.co.uk. By choosing FSDIFDW Double Way Rupture Discs, you ensure effective and reliable pressure relief for your industrial applications.

The Altecnic / Caleffi 309 Pressure & Temperature Relief Valve - 309570CST is designed to effectively regulate and limit the temperature and pressure of hot water in domestic storage heaters. By preventing the water from exceeding 100°C and the formation of steam, this valve ensures safety and efficiency. Once the set parameters are reached, the valve expels an adequate amount of water into the atmosphere, allowing the temperature and pressure to return to safe operating limits. The mechanism of the valve operates as follows: - **Temperature Control**: The thermostat compound within the temperature sensor, which is submerged in hot water, expands as the temperature rises. This expansion drives a thrust pin that acts on the obturator, thereby opening the valve. The valve is calibrated to open when the temperature exceeds 90°C. - **Pressure Control**: When the pressure reaches the predetermined setting, the obturator, which is countered by a set spring, lifts and fully opens the outlet. The pressure setting is selected based on the maximum allowable pressure within the system. As temperature and pressure decrease, the valve automatically re-closes within the specified tolerances.

**Specifications**

• Size: 3/4"
• Connections: Male x Ø 22 mm with compression fitting for copper pipe
• Materials: DZR
• Medium: Water
• Set Pressure: 7 Barg
• Discharge Rating: 25 kW
• Temperature Setting: 90°C
• Probe Length: 99mm
• Product Code: 309570CST
• Notes: WRAS approved, CE marked

This high-quality relief valve is an essential component for maintaining the safety and efficiency of your hot water system, making it a trusted choice for both installers and homeowners.

**Product Features and Benefits** - **Horizontal Swing Pattern**: Designed for efficient operation in various applications. - **High-Quality Bronze Construction**: Crafted from robust bronze for durability and longevity. - **Standard Nitrile Disc with Material Alternatives**: Comes with a nitrile disc as standard, with options for alternative materials available to meet specific needs. - **Taper Threaded to BS EN 10226 ISO 7-1 (BS 21)**: Ensures compatibility and compliance with industry standards. **Product Specifications** - **Swing Pattern**: Features a reliable horizontal swing pattern for optimal functionality. - **Threaded Cover**: Includes a securely threaded cover for ease of maintenance. - **Nitrile Disc Included**: Standard nitrile disc, with options for alternative materials available. - **Internal Threading**: Ends are threaded internally to BS EN 10266 (ISO 7) specifications, ensuring compatibility with standard fittings. - **Versatile Mounting Options**: Suitable for installation in both horizontal and vertical pipe configurations (with vertical flow directed upwards). - **Medium Compatibility**: Adapts to Group 1 and Group 2 liquids. **Pressure and Temperature Ratings** - **Standards Compliance**: Meets BS 5154:1991 PN25 specifications. - **Pressure and Temperature Range**: Operates effectively at 25 Barg from -10°C to a restricted maximum of 100°C. This detailed description is optimised for search engines, making it easy for potential customers to find the reliable and versatile valve they need.