Altecnic / Caleffi 313 Series Pressure Relief Valve With Gauge 1/2" x 1/2" F x F 3 Bar - 313430

The CONCOA 203 Series is a chrome-plated forged brass, single-stage regulator designed for low-pressure delivery of non-corrosive, liquefied, or high-purity inert gases (up to grade 4.5). It provides precise final pressure control from low inlet pressures, with adjustable delivery as low as 0.1 PSIG (7 mBAR) in 0.05 PSIG (4 mBAR) increments, ideal for applications requiring atmospheric or sub-5 PSIG (350 mBAR) outputs.

Features:

• Fine-adjusting screw for precise pressure control

• 316L stainless steel diaphragm prevents inboard diffusion

• CAPSULE® seat design with 360° integral filtration

• Helium leak-tested for integrity

Specifications:

• Max inlet pressure: 200 PSIG (14 BAR)

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

• Gauges: 2½" (63 mm) steel with brass connections

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

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

• Cv: 0.02; Diaphragm: 316L stainless steel

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

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

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

The Fig. 970W and 970WG valves feature a robust ductile iron body with integrated notch plate, anti-blowout stem, and fully bonded epoxy coating for Level 3 C3 corrosion protection. WRAS approved for potable water (-10 to 80°C), they are maintenance-free, suitable for flow regulation and gas applications, and DN250+ valves include a gear operator. Compliant with BS EN 593/558 and approved for Group 1 & 2 gases and liquids (PED 2014/68/EU). Rated PN16, -10 to 80°C (WRAS) or -10 to 100°C (Non-WRAS).

The Altecnic / Caleffi 311 Safety Valve - 311525 is designed for use in domestic hot water systems to safeguard the hot water cylinder, as well as in heating systems to protect boilers and other essential components. This safety valve is carefully selected based on the required set pressure. When system pressure increases and reaches the discharge threshold, the valve automatically opens, releasing excess pressure to the atmosphere. This crucial mechanism prevents the pressure within the system from escalating to hazardous levels, ensuring the safety of the boiler, hot water storage cylinder, and anyone in the surrounding area.

Specifications

Size: 3/4" x 3/4"
Connections: BSP Female Inlet x BSP Female Outlet
Materials: Brass
Medium: Air and Water
Set Pressure: 2.5 Barg
Discharge Flow Rate: 124.4 kg/hr
Max Boiler Rating: 72.3 kW
Temperature Range: +5 to +110 °C
Product Code: 311525
Certifications: WRAS approved, CE marked

Ensure the longevity and safety of your domestic hot water and heating systems with the reliable performance of the Altecnic / Caleffi 311 Safety Valve. Shop now to enhance your system’s safety standards!