Hattersley 971 PN16 Butterfly Valve - Lever Operated

**Product Specifications** - **Sizes Available**: 1/2" (DN15), 3/4" (DN20), 1" (DN25), 1 1/4" (DN32), 1 1/2" (DN40), and 2" (DN50) - **Connections**: Female BSP Inlet and Female BSP Outlet - **Materials**: - **Body**: Gunmetal - **Bonnet**: Brass (for sizes DN15 to DN32) / Cast Iron (for sizes DN40 to DN50) - **Joints & Seals**: Diaphragm: NBR; Seals: NBR - **Medium Compatibility**: Suitable for gases and liquids, including water (potable), neutral non-viscous fluids, compressed air, nitrogen, and non-combustible gases. Please note, this product is not suitable for steam. - **Inlet Pressure (Max)**: - 40 Barg (for sizes 1/2" to 1 1/4") - 25 Barg (for sizes 1 1/2" and 2") - **Outlet Pressure Range**: 0.5 to 9 Barg - **Temperature Range**: -20°C to +100°C - **Certifications**: Complies with PED 97/23/CE, Category I **Additional Notes**: - This product features built-in gauge ports and an integral strainer. - The minimum pressure drop between the inlet and outlet should be 1 Barg. - For assistance with sizing, please use our sizing calculator available in the **TECHNICAL INFO** section of the menu above. Optimise your operations with our reliable and durable product, designed to meet a variety of needs for both gaseous and liquid mediums. Whether for industrial applications or domestic use, our product maintains high standards of safety and efficiency.

**PREL104010 High Capacity Potable Water Pressure Relief Valve** The PREL104010 High Capacity Potable Water Pressure Relief Valve efficiently discharges water from the system at a predetermined pressure, safeguarding against the over pressurisation of cold water in unvented cylinders. Specifically designed for larger capacity systems, the Reliance Valves 104 Series provides robust protection for unvented systems, ensuring they remain operational and safe. These high-capacity pressure relief valves are pre-set and locked to a specific pressure. When system pressure exceeds this threshold, the valve activates by lifting off its seat, allowing water to discharge safely to waste. The outlet connection is sized larger than the inlet, guaranteeing that the valve can handle high-capacity discharges without issue. As a critical safety component in unvented systems, our valves come in various pressure settings from 3.5 to 8 bar and feature multiple connection sizes to accommodate flexible installation options. **Features and Benefits:** - **High Flow Design:** Tailored for larger capacity systems to ensure efficient operation. - **Easy Maintenance:** Rapid removal of the single-piece cartridge simplifies cleaning or replacement. - **Enhanced Durability:** The diaphragm design improves resistance to scale build-up, promoting longevity. - **Safety Assurance:** Provides reliable protection against over pressurisation in your system. - **Versatile Installation:** Multiple connection sizes ensure flexibility during installation. - **Variable Set Pressure:** Relief pressure settings range from 3.5 to 8.0 bar for varied system requirements. - **Cold Water Use:** Specifically designed for cold water applications only. **Specifications:** - **Size:** 3/4" x 1" - **Connections:** BSP Female Inlet x BSP Female Outlet - **Materials:** Hot Pressed DZR Brass - **Medium:** Cold Water - **Set Pressure:** 6 Barg - **Temperature Rating:** +140°C - **Product Code:** PREL104010 Ensure the safety and efficiency of your unvented water systems with the PREL104010 High Capacity Potable Water Pressure Relief Valve – the ideal choice for superior performance and reliability.