Hattersley Fig 669 PN32 Gate Valve

**Stainless Steel Expansion Vessel for Potable Water Applications** Introducing the Reliance Valves Aquasystem Replaceable Membrane Potable Water Expansion Vessels, expertly designed to accommodate the additional pressure generated within water systems as the temperature rises and volume expands. These high-quality expansion vessels play an essential role in maintaining safe operating levels by preventing pressure build-up in both sealed heating and cold water systems. Equipped with a replaceable membrane, these vessels safeguard against corrosion and contamination, ensuring that the water remains safe for human consumption. The innovative design allows for easy servicing; the vessel can be maintained without removal, providing a hassle-free solution for quick in situ servicing. **Features and Benefits:** - **Corrosion Resistance:** The stainless steel bolted flange enhances durability and prevents corrosion. - **Noise Reduction:** The extra wide membrane opening minimises noise resulting from restricted water flow. - **Protection Against Corrosion:** The internal membrane ensures no contact between water and the steel shell, effectively preventing internal corrosion. - **Versatile Range:** Available capacities range from 2 to 5000 litres, catering to a variety of applications. - **Easy Maintenance:** All models are supplied with a replaceable membrane, allowing for simplified servicing. - **Convenient Pre-charge Valve:** Easily top up air pressure with the built-in pre-charge valve. - **Hot and Cold Water Compatibility:** Suitable for use with hot and cold water only. **Specifications:** - **Capacity:** 2 Litres - **Colour:** White - **Pre-set Pressure (Bar):** 3.0 - **Maximum Pressure (Bar):** 10.0 - **Minimum Temperature:** -10°C - **Maximum Temperature:** 99°C - **Height:** 250mm - **Diameter:** 120mm - **Water Connection:** 1/2" MBSP - **Product Code:** XVES050010 **Materials:** - **Shell:** Epoxy Coated - **Membrane:** EPDM - **Bolted Flange:** Stainless Steel **Standards and Approvals:** - WRAS approved for capacities up to 1000 litres - CE marked in accordance with Directive PED 97/23/CE - TUV Certified - Compliance with BS 6920 for models ranging from 1000 to 5000 litres. Invest in the Reliance Valves Aquasystem Replaceable Membrane Potable Water Expansion Vessels for reliable performance and peace of mind knowing your water supply is safe and efficiently managed.

**Altecnic / Caleffi 312 Safety Valve - Model 312460CST** The Altecnic / Caleffi 312 Safety Valve (Product Code: 312460CST) is essential for safeguarding domestic hot water systems. This reliable valve is designed to protect hot water cylinders, boilers, and various components in heating systems. Each valve is carefully selected for its required set pressure, ensuring optimal performance. When the system pressure exceeds the preset level, the 312 Safety Valve activates, discharging excess pressure safely into the atmosphere. This critical function helps prevent dangerously high pressure within the system, protecting both the boiler and hot water storage cylinder, as well as ensuring safety for personnel nearby. **Specifications:** - **Size:** 1/2" x 1/2" - **Connections:** BSP Male Inlet x BSP Female Outlet - **Materials:** Brass - **Medium:** Air and Water - **Set Pressure:** 6 Barg - **Discharge Flow Rate:** 248.8 kg/hr - **Maximum Boiler Rating:** 144.6 kW - **Temperature Range:** +5 to +110 °C - **Product Code:** 312460CST - **Certifications:** WRAS approved, CE marked Choose the Altecnic / Caleffi 312 Safety Valve to ensure efficiency, safety, and compliance in your hot water and heating systems. Ideal for both residential and commercial applications, this valve is a critical component for maintaining operational integrity.

The Emerson Kunkle Model 337 safety relief valve is designed to safeguard low to medium pressure, high volume blowers, compressors, conveying systems, and bulk hauling trailers and equipment.

As part of our service, we offer complimentary setting and testing of the valve, along with a pressure test certificate for your peace of mind.

**Key Features:**

- **High Capacity Design:** The large nozzle facilitates an impressive flow rate.
- **Enhanced Performance:** Flat bronze valve seats are precision-lapped for optimal functionality.
- **Easy Adjustability:** The warn ring allows for precise opening with minimal pre-opening or simmer.
- **Alignment Correction:** A pivot mechanism between the disc and spring compensates for misalignment and spring side thrust.
- **Manual Testing Convenience:** The Model 337 features a 'lift-pin' device for straightforward manual testing.
- **Robust Construction:** Comes standard with a bronze nozzle and disc, with optional stainless steel trim available.
- **Thorough Inspection:** Each valve undergoes rigorous testing and inspection for pressure settings and leakage.

**Specifications:**
Material: Body - Cast Iron / Nozzle - Bronze
Sizes Available: 2" to 3" (DN50 to DN80)
Connections: NPT Male Inlet x NPT Female Outlet or BSPT Male Inlet x BSPT Female Outlet
Orifice Sizes: 2" - 1.916 Sq. in. / 2.5" - 2.786 Sq. in. / 3" - 4.037 Sq. in.
Medium: Air
Pressure Range: 0.07 to 4.1 barg (1 to 60 psig)
Temperature Range: -29°C to 208°C (-20°F to 406°F)