Altecnic / Caleffi 309 Series Pressure & Temperature Relief Valve 3/4" 90°C 10 Bar - 309500CST

Product Specifications

Available Sizes: 1/4" and 1/2"
Connection Types: Screwed BSPP or NPT
Material Composition: Stainless Steel 316
Disc Options: PEEK, Nylon, or Vespel
Joints & Seals: Diaphragm made from PEEK, Nylon, or Vespel
Suitable Medium: Steam, Gases, and Liquids
Maximum Inlet Pressure: 600 Barg
Outlet Pressure Range: 30 to 232 Barg

Discover our high-quality valves designed for optimal performance in various applications. Manufactured from durable Stainless Steel 316, these valves are suitable for steam, gases, and liquids, ensuring reliability and longevity. With options for connection types and disc materials, our products cater to diverse industrial needs. Maximise your system’s efficiency with our valves that can withstand a maximum inlet pressure of 600 Barg and an adjustable outlet pressure range from 30 to 232 Barg. Ideal for professionals seeking dependable solutions in challenging environments.

The Altecnic / Caleffi 309 Pressure & Temperature Relief Valve - 309400CST is designed to effectively control and limit the temperature and pressure of hot water in domestic storage heaters. This essential safety valve ensures that water temperatures do not exceed 100°C, preventing steam formation. When the temperature or pressure reaches its set limits, the valve releases a sufficient amount of water into the atmosphere, ensuring that both temperature and pressure return to safe operating levels.

**How It Works:**

The valve features a thermostat compound within the temperature sensor that is submerged in the hot water storage heater. As the temperature increases, the compound expands, moving a thrust pin that activates the obturator, thereby opening the valve. This mechanism is set to initiate opening at temperatures exceeding 90°C. Regarding pressure, the obturator, which is countered by a spring, lifts when the pressure reaches its designated limit, fully opening the outlet. The pressure setting is predetermined based on the system's maximum permissible pressure. As the temperature and pressure decrease, the valve automatically re-closes within the specified tolerances.

**Product Specifications:**

• Size: 1/2"
• Connections: Male x Ø 15 mm with compression fitting for copper pipe
• Materials: DZR
• Medium: Water
• Set Pressure: 10 Barg
• Discharge Rating: 10 kW
• Temperature Setting: 90°C
• Probe Length: 102mm
• Product Code: 309400CST

**Notes:** WRAS approved, CE marked

This high-quality pressure and temperature relief valve is an indispensable component for maintaining the safety and efficiency of your domestic hot water system. Ensure optimal performance and compliance with regulations by choosing the Altecnic / Caleffi 309 Pressure & Temperature Relief Valve.