Hattersley Fig 250W PN16 Double Check Valve

Features & Benefits

•Allows for the drainage of the system without the need to remove pipework
•Prevents sediment accumulation
•Enhances the longevity of pipework

Specification

•90º operation. Available sizes range from 1/2" to 1", supplied complete with cap and strap.
•Plugs feature square heads with a slot to indicate the plug's position.
•Malleable iron levers can be provided upon request.
•The malleable iron lever can be pinned to the plug head for an additional charge.
•Fitted with taper threads as per BS EN 10226 (ISO 7-1), formerly known as BS 21.
•Please note: Figure 81HU Gland Cocks are not suitable for gas applications.

Pressure/Temperature Rating

•Rated for 10 bar at temperatures ranging from 0 to 120ºC

**PREL100014 High Capacity Sealed Heating System Pressure Relief Valve** The PREL100014 High Capacity Sealed Heating System Pressure Relief Valve is designed to safely discharge water from the system at a predetermined pressure during instances of over-pressurisation—particularly suitable for larger capacity systems. Manufactured by Reliance Valves, the 100 Series Pressure Relief Valves are crafted from hot pressed brass and are primarily employed to protect closed-circuit wet heating systems against excessive pressure. Key features include an outlet that is one size larger than the inlet, ensuring high discharge flow rates. The valve features a separate seal seating from the diaphragm, enhancing resistance to scaling, and a cover made from OT58 brass. Available in various sizes to accommodate most installations, it operates within a pressure range of 2.5 - 5.0 bar, with the specified response pressure conveniently indicated on the twist cap. The appropriate valve size is determined by the heat output of the boiler, as detailed in the maximum heating capacity table. ### Features and Benefits: - **High Flow Design:** Optimised for larger capacity systems. - **Enhanced Discharge Capacity:** The outlet is larger than the inlet for superior discharge rates. - **Overpressure Protection:** Safeguards wet heating systems against excessive pressure. - **Improved Scaling Resistance:** Diaphragm design enhances resistance to scale build-up. - **Easy Maintenance:** Cartridge design allows for hassle-free servicing and replacements without the need to reset response pressure. - **Versatile Pressure Range:** Set pressure range from 2.5 - 5.0 bar accommodates diverse system requirements. - **Increased Discharge Capability:** High lift design for enhanced discharge performance. - **Application Specific:** Suitable exclusively for heating applications. ### Specifications: - **Size:** 3/4" x 1" - **Connections:** BSP Female Inlet x BSP Female Outlet - **Materials:** Hot pressed DZR Brass - **Medium:** Water - **Set Pressure:** 3 Barg - **Temperature:** +140 °C - **Product Code:** PREL100014 - **Notes:** WRAS approved Ensure the reliability and efficiency of your heating system with the PREL100014 High Capacity Sealed Heating System Pressure Relief Valve—designed to protect and enhance your installation's performance.

**Product Specification** **Sizes Available:** 1/4", 3/8", 1/2" **Connections:** - Tri-Clamp (ASME BPE or DIN 32676) - Male Union (DIN 11851 / 11864-1) - Varivent Flange (DIN 11864-2) - Flanged PN16 or ANSI 150 R/F - Screwed (ISO 228) **Materials Used:** - Stainless Steel 316L or 304 **Disk Options:** - EPDM - PTFE (FDA approved) - AF100 - Viton **Joints & Seals:** - Diaphragm: EPDM, PTFE (FDA approved), AF100, or Viton **Compatible Mediums:** - Steam, Gases, and Liquids **Set Pressure Range:** - 0.004 to 0.98 Barg **Cv Range:** - [Insert specific range here if applicable] **Temperature Range:** - [Insert temperature range here if applicable] **Certifications and Approvals:** - [Insert specific approvals here if applicable] **Additional Notes:** - [Insert any pertinent notes or details here] This product is designed for a wide range of applications, ensuring reliability and safety in various industrial settings. Whether you are dealing with steam, gases, or liquids, our valves offer top-notch performance and durability. For further information or specific inquiries, please contact us. Optimised for quality, our products are compliant with industry standards and will meet your operational needs seamlessly.