Niezgodka Type 90 Combined Vacuum & Pressure Relief Valve

### Product Specification **Sizes Available:** 3/8", 1/2", 3/4", 1", 1.1/4" **Connections:** Screwed BSPP or NPT **Materials:** S.G. Iron (18.1) or Stainless Steel (18.2 & 18.7) **Disk Options:** Metal, Viton, Nylon, or PEEK (dependent on pressure requirements) **Joints & Seals:** NBR, FPM, EPDM (varies by model) **Compatible Media:** Steam, Gases, and Liquids **Set Pressure Range:** 0.05 to 200 Barg (dependent on size) **Temperature Range:** - **(18.1)** -10 to 280°C - **(18.2)** -60 to 280°C - **(18.7)** -200 to 280°C **Design Notes:** The specified temperature range applies to valves featuring a Metal disk. This comprehensive specification ensures you select the correct valve for your application needs, optimising performance across a wide range of environments. Ideal for industrial and commercial use, our product guarantees reliability and efficiency. For further inquiries or bespoke requirements, please contact us today.

The Altecnic / Caleffi 311 Safety Valve - 311480 are used in domestic hot water systems to protect the hot water cylinder and in heating systems to protect boiler and other components. The valve is selected for the required set pressure. As the pressure rises, when the discharge pressure is reached the valve opens and discharges to atmosphere, preventing the pressure within the system reaching levels which would be dangerous for the boiler, hot water storage cylinder and any personnel in the adjacent vicinity. 

Specification

Size: 1/2" x 1/2"Connections: BSP Female Inlet x BSP Female OutletMaterials: BrassMedium: Air and WaterSet Pressure: 8 BargDischarge Flowrate: 322.7 kg/hrMax Boiler Rating: 187.5 kWTemperature: +5 to +110 degCProduct Code: 311480Notes: WRAS approved, CE marked

**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.