Hattersley Fig 973W PN16 Double Regulating Valve

**Product Specification: Pressure Relief Valves** **Size Options:** 3/8", 1/2", 3/4", 1", 1.1/4", 1.1/2", 2" **Connections:** Available in Screwed BSPP or NPT **Materials:** - **Inlet Nozzle:** Stainless Steel - **Body & Bonnet:** Stainless Steel (1.2) - **Disk Types:** Metal, Viton, Nylon, PEEK or Vespel - **Joints & Seals:** NBR, FPM, EPDM (varies by model) **Head Type:** A (Gas-tight Lever) **Compatible Media:** Steam, Gases, and Liquids **Set Pressure Range:** 0.05 to 500 Barg (subject to size and availability of multiple springs) **Temperature Range:** -60 to 280 °C (Note: This temperature range pertains to valves equipped with a metal disk) These high-quality pressure relief valves are expertly designed to ensure safety and efficiency in various industrial applications. Whether for steam, gases, or liquids, our valves provide reliable performance across a broad temperature spectrum. Perfect for industries seeking durable and efficient solutions. For more information on our range, please get in touch.

The PREL100016 High Capacity Sealed Heating System Pressure Relief Valve discharges water off the system at a set pressure in the event of system over pressurisation (high for larger capacity systems) Reliance Valves 100 Series Pressure Relief Valves are made from hot pressed brass and are predominantly used to protect closed-circuit wet heating systems from overpressure. The outlet is one size larger than the inlet to ensure high discharge flow rates. It has a separate seal seating from the diaphragm to give improved scaling resistance and a cover which is made from OT58 brass. Available in a variety of sizes to suit most installations, it also has a pressure range from 2.5 - 5.0 bar, with the response pressure indicated on the twist cap. The valve size is determined by the heat output of the boiler as shown in the maximum heating capacity table. 

Features and benefits: 

- High flow design for larger capacity systems 

- Outlet is one size larger than the inlet for high capacity discharge 

- Provides protection against over pressurisation in wet heating systems 

- Diaphragm design gives improved resistance against scale 

- Cartridge design gives ease of service and replacement without the need to reset the response pressure 

- Set pressure range from 2.5 - 5.0 bar to suit any system requirement 

- High lift design for increased discharge capacity 

- Suitable for heating applications only 

Specification

Size: 3/4" x 1"Connections: BSP Female Inlet x BSP Female OutletMaterials: Hot pressed DZR BrassMedium: WaterSet Pressure: 4 Barg Temperature: +140 degCProduct Code: PREL100016Notes: WRAS approved

The CONCOA 304 Series is a three-port, chrome-plated brass, single-stage point-of-use regulator designed for high-purity, non-corrosive, or liquefied gases (up to grade 5.5). It provides secondary or final-line pressure control, reducing delivery pressure in a single step. Its durable construction and high-purity compatibility make it a cost-effective solution for applications that can tolerate minor outlet pressure fluctuations as cylinder supply decreases. Maximum inlet pressure is 3000 PSIG (210 BAR) or higher, depending on configuration.

Features:

• 316L stainless steel diaphragm prevents inboard diffusion

• CAPSULE® seat with 360° integral filtration

• Low wetted surface area reduces purge requirements

• Rear panel mount simplifies installation

• Helium leak-tested for integrity

Specifications:

• Max inlet pressure: 3000 PSIG (210 BAR)

• Body: Chrome-plated brass barstock; Bonnet: Chrome-plated die-cast zinc

• Gauges: 2" (50 mm) plated case

• Seat: PTFE; Filter: 10-micron sintered bronze

• Temperature range: -40°F to 140°F (-40°C to 60°C)

• Cv: 0.1; Diaphragm: 316L stainless steel

• Helium leak integrity: 1 × 10⁻⁸ scc/sec

• Internal seals: PTFE; Ports: 1/4" FNPT

• Compliance: Meets/exceeds CGA G-4.1, PED 2014/68/EU, ANSI/ASME B40.1, CRN OH5216