Niezgodka Type 80 SKG Sustaining Valve

**Stainless Steel Expansion Vessel for Potable Water Applications** The Reliance Valves Aquasystem Replaceable Membrane Potable Water Expansion Vessels are expertly engineered to accommodate the additional load within a water system as the water heats up and expands. These expansion vessels play a crucial role in maintaining safe operating levels by preventing pressure build-up in both sealed heating systems and cold water systems. Featuring a replaceable internal membrane, our vessels safeguard the water from corrosion and contamination, ensuring that it remains safe for human consumption. This innovative design allows for convenient servicing without the need to remove the vessel, enabling quick and efficient maintenance on-site. **Features and Benefits:** - **Corrosion-Resistant Design:** The stainless steel bolted flange prevents corrosion, extending the vessel's lifespan. - **Enhanced Flow Capacity:** An extra wide membrane opening reduces noise caused by restricted flow, providing a quieter operation. - **Protection Against Internal Corrosion:** The internal membrane ensures that water does not come into contact with the steel shell, effectively preventing internal corrosion. - **Comprehensive Range:** Available in sizes from 2 to 5000 litres, catering to all types of applications. - **User-Friendly Serviceability:** All models are supplied with a replaceable membrane, allowing for servicing without removal. - **Pre-Charge Valve Included:** Easily top up the air pressure with the pre-charge valve feature. - **Versatile Application:** Suitable for both hot and cold water systems. **Specifications:** - **Capacity:** 35 Litres - **Colour:** White - **Pre-Set Pressure (Bar):** 3 - **Max Pressure (Bar):** 10.0 - **Minimum Temperature:** -10°C - **Maximum Temperature:** 99°C - **Height:** 440mm - **Diameter:** 365mm - **Water Connection:** 3/4" M BSP - **Product Code:** XVES050070 **Materials:** - **Shell:** Epoxy Coated Shell - **Membrane:** EPDM - **Bolted Flange:** Stainless Steel **Standards and Approvals:** - WRAS approved for up to 1000 litres - CE marked in accordance with Directive PED 97/23/CE - TUV Certified - Materials in 1000 - 5000 litre models comply with BS 6920 Explore our range today to find the perfect stainless steel expansion vessel for your potable water applications. Maintain safety and efficiency with Reliance Valves Aquasystem.

The Altecnic / Caleffi 309 Pressure & Temperature Relief Valve - 309473CST is designed to effectively control and limit the temperature and pressure of hot water in domestic storage heaters. This essential safety device prevents water temperatures from exceeding 100°C, thereby eliminating the risk of steam formation. When the system reaches predetermined pressure or temperature thresholds, the valve discharges a sufficient amount of water into the atmosphere, ensuring that both temperature and pressure are maintained within safe operating limits. The valve's mechanism operates as follows: - **Temperature Control:** As the temperature in the storage heater rises, the thermostat compound within the temperature sensor, which is submerged in hot water, expands. This expansion causes a thrust pin to move, actuating the obturator and opening the valve. The valve is set to activate at temperatures exceeding 90°C. - **Pressure Control:** When pressure limits are reached, the obturator, which is opposed by a set spring, lifts and fully opens the outlet. The pressure setting is specifically configured according to the maximum allowable pressure within the system. As temperature and pressure subside, the valve automatically re-closes within designated tolerances.

Specifications

Size: 1/2"
Connections: Male x Ø 15 mm with compression fitting for copper pipe
Materials: DZR
Medium: Water
Set Pressure: 7 Barg
Discharge Rating: 10 kW
Temperature Setting: 90 degC
Probe Length: 97mm
Product Code: 309473CST
Notes: WRAS approved, CE marked

Optimise your domestic storage heating system's safety and efficiency with the Altecnic / Caleffi 309 Pressure & Temperature Relief Valve, providing peace of mind for your home.

**Product Specification** **Size Options:** 3/8", 1/2", 3/4", 1" **Connections:** Screwed BSPP or NPT **Materials:** - **Nozzle:** Stainless Steel - **Spring Bonnet:** S.G Iron - **Disk:** Metal - **Joints & Seals:** NBR, FPM, EPDM (varies by model) **Head Type:** A (Gas Tight Lever) **Suitable Mediums:** Steam, Gases, and Liquids **Set Pressure Range:** 0.05 to 500 Barg (model dependent) **Temperature Range:** -10 to 280 °C **Additional Information:** We offer various other models (please refer to downloads) featuring alternative O-ring and disc materials, NPT connections, different orifice sizes, and distinct head types. For further assistance or specific inquiries, please do not hesitate to contact us. Optimise your operations with our robust pressure relief valves that cater to a wide range of applications, ensuring safety and efficiency in handling steam, gases, and liquids.