The CONCOA 420 Series four-port, single-stage line regulator features SilcoNert® 2000-treated wetted surfaces for reactive or corrosive gases, providing stable primary or secondary pressure control. Ideal for ultra-pure, inert, or trace reactive gases like hydrogen sulfide, mercury, and nitric oxide, the regulator offers a metal-to-metal diaphragm seal, CAPSULE® seat with 360° filtration, cleanroom assembly, and front/rear panel mounting. Rated for up to 3000 PSIG (4500 PSIG optional), with SilcoNert® 2000 body, bonnet, diaphragm, and filter, PTFE seat and seals, 1/4 in FNPT ports, Cv 0.1, and helium leak integrity of 1×10⁻⁹ scc/sec. Conforms to CGA G-4.1, PED 2014/68/EU, ANSI/ASME B40.1, and CRN OH5216.5R2. Operating temperature: -40°F to 140°F (-40°C to 60°C).

The PREL100023 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: 1" x 1.1/4"Connections: BSP Female Inlet x BSP Female OutletMaterials: Hot pressed DZR BrassMedium: WaterSet Pressure: 3 BargTemperature: +140 degCProduct Code: PREL100023Notes: WRAS approved

Stainless Steel Expansion Vessel for Potable Water Applications

The Reliance Valves Aquasystem Replaceable Membrane Potable Water Expansion Vessels are expertly designed to accommodate the increased load within water systems as water is heated and expands. These expansion vessels play a crucial role in maintaining safe operating levels, preventing excessive pressure build-up in both sealed heating and cold water systems. Each vessel features a replaceable membrane that safeguards against corrosion and contamination, ensuring that the water remains safe for human consumption. The inclusion of a replaceable membrane also facilitates easy servicing of the vessel without requiring removal, allowing for quick maintenance in situ.

Features and Benefits:

• Stainless Steel Bolted Flange: Resists corrosion for enhanced durability.
• Extra Wide Membrane Opening: Reduces noise caused by restricted flow for a quieter operation.
• Internal Membrane Protection: Ensures no contact between water and the steel shell, preventing internal corrosion.
• Comprehensive Size Range: Available in sizes from 2 to 5000 litres, catering to all applications.
• Easy Servicing: All models are supplied with a replaceable membrane for convenient maintenance without removal.
• Pre-Charge Valve: Allows for simple air pressure adjustments.
• Suitable for Hot and Cold Water: Designed specifically for these applications.

Specifications

• Capacity: 100 Litres
• Colour: Blue
• Pre-Set Pressure: 3.5 Bar
• Maximum Pressure: 10.0 Bar
• Minimum Temperature: -10°C
• Maximum Temperature: 99°C
• Height: 849 mm
• Diameter: 495 mm
• Water Connection: 1" MBSP
• Product Code: XVES050110

Materials

• Shell: Epoxy Coated Steel
• Membrane: EPDM
• Bolted Flange: Stainless Steel

Standards and Approvals

• WRAS Approved for vessels up to 1000 litres
• CE Marked in accordance with Directive PED 97/23/CE
• TUV Certified
• Materials for 1000 - 5000 litre models comply with BS 6920

For a reliable and efficient solution to manage pressure in your potable water systems, choose the Reliance Valves Aquasystem Replaceable Membrane Potable Water Expansion Vessels.