Low Flow Screwed Liquid Turbine Flow Meter

The Altecnic / Caleffi 312 Safety Valve - 312425 is an essential component for domestic hot water systems, designed to safeguard hot water cylinders and heating systems, including boilers and other critical components. This safety valve is chosen based on the specific set pressure required for your system. As pressure increases and reaches the predetermined discharge pressure, the valve opens, allowing excess pressure to escape to the atmosphere. This vital function prevents the internal pressure from escalating to levels that could pose a risk to the boiler, hot water storage cylinder, and the safety of personnel nearby.

Technical Specifications

• Size: 1/2" x 1/2"
• Connections: BSP Male Inlet x BSP Female Outlet
• Materials: Brass
• Medium: Air and Water
• Set Pressure: 2.5 Barg
• Discharge Flowrate: 124.4 kg/hr
• Max Boiler Rating: 72.3 kW
• Temperature Range: +5 to +110 °C
• Product Code: 312425

Notes: This product is WRAS approved and CE marked, ensuring compliance with industry standards and safety regulations.

The CONCOA 205 Series is a four-port, chrome-plated forged brass point-of-use regulator designed for high purity inert gas applications. It delivers secondary pressure control for non-corrosive, liquefied, high purity gases (up to grade 4.5) and is well suited to high purity gas distribution systems. With a maximum inlet pressure rating of at least 3000 PSIG (210 BAR), depending on configuration, it supports safe operation with high-pressure cylinders. Factory-installed options allow the regulator to be configured as a single-station manifold, with or without purge functionality.

Features:

• 316L stainless steel diaphragm reduces inboard diffusion

• CAPSULE® seat design provides integral 360° filtration

• 3000 PSIG inlet rating enables safe high-pressure use

• Standard relief valve protects gauges and diaphragm

• Helium leak-tested to ensure leak integrity

Specifications:

• Max inlet pressure: 3000 PSIG (210 BAR)

• Body: Chrome-plated forged brass; Bonnet: Chrome-plated die-cast zinc

• Gauge: 2½" (63 mm) plated case

• Seat: PTFE; Filter: 10-micron sintered bronze

• Temperature range: -40°F to 140°F (-40°C to 60°C)

• Diaphragm: 316L stainless steel; Cv: 0.28

• Helium leak integrity: 1 × 10⁻⁸ scc/sec

• Internal seals: PTFE; Ports: 1/4" FNPT

• Compliance: CGA G-4.1, PED 2014/68/EU, ANSI/ASME B40.1, CRN OH5216

The Hattersley Fig 1732L Fixed Orifice Double Regulating Valve (FODRV - Low Flow) is a high-performance commissioning solution designed for precise flow regulation. It boasts an impressive accuracy of ±5% across all settings, making it ideal for various applications. The integral fixed orifice design not only enhances accuracy, but also simplifies installation by reducing connections, ultimately leading to lower installation costs.

Features & Benefits

• Delivers precise and accurate flow regulation
• Easy operation with a handwheel and clear numerical indicator
• Combines integral orifice with built-in test points, eliminating the need for separate DRV and metering station
• WRAS Approved for use with potable water at temperatures up to 85°C
• Ensures positive flow control across all handwheel settings
• Maintains ±5% accuracy for both flow regulation and measurement

Specifications

• Complies with BS7350: 1990
• Operated via a handwheel
• Features a numerical indicator for ease of use
• Includes an inside screw non-rising handwheel
• Equipped with a characterised regulating disc
• Contains an integral fixed orifice
• Supplied with two Figure 631 test points
• Threaded end connections
• Available in sizes ranging from 1 to 2" taper threaded
• Conforms to BS EN 10266 (ISO 7-1), formerly BS 21
• Sizes 1/2" & 3/4" conform to ISO 228 parallel
• WRAS Approved Product

Pressure/Temperature Ratings (Threaded Ends)

• BS 7350 PN20
• 17.2 bar at 120ºC
• 20 bar from -10 to 100ºC

Compression Ends

• 5 bar at 120ºC
• 6 bar at 110ºC
• 10 bar at 65ºC
• 16 bar from -10 to 30ºC
• WRAS approval temperature range: -10 to 85ºC

For reliable and accurate flow regulation, choose the Hattersley Fig 1732L Fixed Orifice Double Regulating Valve—engineered for efficiency and approved for potable water use.