Hattersley Fig 2900 PN16 Thermal Circulation Valve

The CONCOA 332 Series is a five-port, stainless steel, dual-stage cylinder regulator designed for primary pressure control of high-purity inert gases (up to grade 5.5), including mildly reactive gases—but not toxic or highly corrosive gases. Its two-stage design minimizes pressure fluctuations from cylinder depletion, providing stable delivery pressure for critical applications. Factory-configurable options make it ideal for university labs, research facilities, and pharmaceutical manufacturing.

Features:

• 316L stainless steel diaphragm prevents inboard diffusion

• CAPSULE® seat design with 360° integral filtration in both stages

• Helium leak-tested for integrity

Specifications:

• Max inlet pressure: 3000 PSIG (210 BAR); optional 4500 PSIG (310 BAR)

• Body: 316L stainless steel barstock; Bonnet: Chrome-plated die-cast zinc

• Gauges: 2" (50 mm) stainless steel plated case

• Seats: PCTFE (first stage), PTFE (second stage)

• Filter: Patented 10-micron 316 stainless steel mesh

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

• Diaphragm: 316L stainless steel; Cv: 0.1

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

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

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

The Altecnic / Caleffi 253 Solar Safety Valve - 253046 is designed to regulate pressure within the primary circuits of solar heating systems. This valve is specifically chosen based on the required set pressure. As pressure increases within the system, the valve activates when the discharge pressure is reached, releasing excess pressure to the atmosphere. This vital function helps prevent potential damage to solar collectors and other system components caused by excessive pressure levels.

Specification

• Size: 1/2" x 3/4"
• Connections: BSP Female Inlet x BSP Female Outlet
• Materials: Brass (Chrome Plated)
• Medium: Water, Glycol Solutions (Maximum Glycol Percentage: 50%)
• Set Pressure: 6 Barg
• Temperature Range: -30 to +160 degrees Celsius
• Product Code: 253046
• Notes: CE marked

This reliable safety valve is an essential component for maintaining the efficiency and safety of your solar heating system. Its robust construction and advanced design ensure it meets industry standards, providing peace of mind for your installation.

Features & Benefits

• Offers precise and accurate measurements in accordance with BS 7350:1990 standards. • Manufactured from dezincification-resistant materials to prevent corrosion, cracking, and fungal growth. • The Flow Measurement Device is designed for systems where pipe sizing is based on frictional losses between 100 to 400 Pa/m. • WRAS Approved for safe use with potable water up to 85°C. • Comes complete with red and blue test points for easy identification of upstream and downstream ports. • Ensures flow measurement accuracy within ±5%.

Specification

• Fully conforms to BS 7350:1990 standards.

• WRAS Approved for use with water temperatures up to 85°C.

• Fitted with two Figure 631 test points and Figure 1000 end connections, threaded to BS EN 10266 (ISO 7-1), formerly known as BS 21.

• Features taper female threads, except for the 1/2" inlet, which is parallel.

Pressure/Temperature Ratings

• Threaded Ends• PN25 Series B• 15 Barg at 120ºC• 25 Barg from -10 to 120ºC