Altecnic / Caleffi 309 Series Pressure & Temperature Relief Valve 3/4" 90°C 7 Bar - 309570CST

The PREL104002 Reliance Water Controls (RWC) 104 Series High Capacity Potable Water Pressure Relief Valve is designed to efficiently discharge excess water from the system when cold water over-pressurisation occurs in unvented cylinders. This high-flow valve is specifically engineered for larger capacity systems, ensuring superior performance and safety. The Reliance Valves 104 Series offers a robust solution for protecting unvented systems from over-pressurisation. Each valve is pre-set and securely locked to a specified pressure; should the system surpass this threshold, the valve will automatically lift, allowing water to discharge safely into the waste system. The outlet connection is designed to be one size larger than the inlet, ensuring that the valve can handle high-capacity discharges effectively. This valve serves as the primary safety device within an unvented system. Available in various pressure settings from 3.5 to 8 bar, as well as multiple connection sizes, it supports flexible installation options.

Features and Benefits:

• High-flow design ideal for larger capacity systems.
• Easy removal of the single-piece cartridge for cleaning or replacement.
• Innovative diaphragm design offers enhanced resistance to scale build-up.
• Effectively protects against over-pressurisation.
• Varied connection sizes for versatile installation.
• Set relief pressure range from 3.5 to 8.0 bar.
• Specifically designed for cold water applications only.

Specification:

• Size: 1" x 1.1/4"
• Connections: BSP Female Inlet x BSP Female Outlet
• Materials: Hot pressed DZR Brass
• Medium: Cold water
• Set Pressure: 6 Barg
• Temperature: +140°C
• Product Code: PREL104002

**PREL107020 Potable Water Pressure Relief Valve** The PREL107020 Potable Water Pressure Relief Valve is specifically engineered to safeguard unvented cylinders from cold water over-pressurisation. Part of the Reliance Valves 107 Series, this pressure relief valve effectively discharges water from the system when a designated pressure threshold is exceeded, ensuring optimal safety and performance. The valves come pre-set and securely locked to a specific pressure; should the system experience over-pressurisation, the valve will lift from its seat, allowing excess water to flow to waste. This valve acts as the primary safety device within any unvented system. Available in pressure settings ranging from 3.5 to 6 bar, the PREL107020 also features various connection sizes, providing flexibility for installation. **Features and Benefits:** - **Diaphragm Design:** Enhanced resistance to scale build-up. - **Over-Pressurisation Protection:** Ensures your system operates safely, preventing potential damage. - **Multiple Connection Options:** Allows for versatile installation to suit different setups. - **Set Relief Pressure Range:** 3.5 - 6.0 bar, accommodating various system requirements. - **Cold Water Use Only:** Specifically designed for cold water systems, ensuring efficiency and safety. **Specifications:** - **Size:** 1/2" x 15mm - **Connections:** BSP Male Inlet x Compression Outlet - **Materials:** Hot Pressed DZR Brass - **Medium:** Water - **Set Pressure:** 3.5 Barg - **Temperature Rating:** Up to +110°C - **Product Code:** PREL107020 - **Notes:** WRAS approved Enhance the reliability and safety of your unvented water systems with the PREL107020 Potable Water Pressure Relief Valve – the essential component for effective pressure management.

The Kunkle Bailey 707VD Safety Relief Valve (Male x Female) features a top-guided design, ensuring an unobstructed seat bore and high lift capability for optimal performance. This valve is certified to BS EN 4126 Part 1 (BS6759 Pt 1:2:3) and is suitable for applications involving air/gas, steam/hot water (temperatures exceeding 212°F / 100°C), and process liquids, depending on the specific model selected. At Flowstar, we will configure and test the valve according to your specifications, and can provide a pressure test certificate upon request prior to dispatch.

Specifications

Sizes: 1/2" to 2"
Connections: BSP Male Inlet x BSP Female Outlet
Materials: Bronze body, Chrome Alloy spring
Disc: Aflas
Medium: Air, Vapours, Gases, Liquids, and Steam
Set Pressure: 0.35 to 24 Barg
Temperature: -20 to +200°C
Notes: Commonly referred to as IMI Bailey Birkett valves, Kunkle Emerson valves, and Safety Systems UK valves.