Auld Double Control Reducing Valve

The Reliance Water Controls (RWC) TPR15 Pressure and Temperature Relief Valves are compact devices meticulously engineered to safeguard against overpressurisation within unvented hot water systems. This crucial protection comes into play if the temperature or pressure controls fail. These valves are designed to be installed at the upper section of a hot water cylinder, where the highest temperatures can typically be found. In the event that the system temperature exceeds 95°C, the wax mixture within the temperature probe's element expands, causing the valve to lift off its seat and release water to waste. This process effectively alleviates excess pressure within the cylinder. Additionally, if the water pressure increases without a corresponding rise in temperature, the valve remains closed until it reaches the set pressure of the relief mechanism, at which point it opens to relieve the excess pressure. Certain models feature a PTFE coating on the MBSP inlet thread, significantly enhancing installation efficiency. ### Features and Benefits: - Provides protection against temperatures exceeding 95°C - Prevents dangerous overpressurisation - Twist-top cartridge design facilitates easy servicing - Available in a variety of pressure settings and probe lengths - Some models include a PTFE coating for added convenience ### Specification: - **Size:** 1/2" x 15mm - **Connections:** BSP Male Inlet x Compression Outlet - **Materials:** Brass - **Medium:** Hot water only - **Set Pressure (Set & Locked):** 6 Barg - **Temperature Relief:** +90 to 95 °C - **Discharge Capacity:** 10 kW - **Probe Length:** 95 mm - **Product Code:** PTEM550857 - **Notes:** Includes PTFE, WRAS approved Ensure the safe operation of your unvented hot water system with the RWC TPR15 Pressure and Temperature Relief Valves, an essential investment for any modern heating system.

The Hattersley Fig 775 PN10 Automatic Air Vent safely removes trapped air from single or multi-boiler and calorifier systems, simplifying venting and saving time and costs. WRAS approved for closed circuits, with an optional ½" shut-off valve (specify when ordering Fig. 776).

Features & Benefits: Removes trapped air, simplifies venting, saves time/costs, WRAS approved, optional shut-off valve, meets BS EN 1074-4.

Specification: Brass body & cover, polypropylene float, EPDM seals, BSP parallel thread, optional ½" shut-off valve.

Pressure/Temperature Rating: 10 bar at 120°C.

Features & Benefits

• Delivers precise and accurate flow regulation
• User-friendly operation with a handwheel and clear numerical indicator
• Integrated orifice and test points – eliminating the need for separate DRV and metering stations
• WRAS Approved for use with drinking water up to 85°C
• Ensures consistent flow control across all handwheel settings
• The FODRV guarantees an accuracy of ± 5% across all settings, facilitating precise flow regulation and measurement

Specification

• Conforms to BS7350: 1990
• Handwheel operated for ease of use
• Includes a numerical indicator for clear readings
• Inside screw non-rising handwheel for compact design
• Features a characterised regulating disc
• Equipped with an integral fixed orifice
• Comes with two Figure 631 test points for enhanced functionality
• Flow charts available for reference
• End connections are threaded for secure attachment
• Available in sizes from 1 to 2" taper threaded
• Conforms to BS EN 10266 (ISO 7-1), formerly BS 21
• Available in sizes 1/2 & 3/4" to ISO 228 parallel
• Sizes DN15 & DN20 suitable for use with compression adaptors compatible with copper pipe to BS EN 1057 R250 (half hard)
• WRAS Approved Product for quality assurance

Pressure/Temperature Rating

• Please refer to the datasheet for detailed specifications.