NABIC 542F Flanged Safety Relief 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

Auld Valves Ltd has ceased trading. Please contact us to explore alternative options available in our product range. 

The Auld Vigilant Safety Valve features a blowdown characteristic ranging from 5% to 10%. It boasts a fully enclosed flow design with an external spring that remains unaffected by the process fluid or temperature. A soft face version is also available. This valve complies with normal lift designs according to BS759 and BS1500 standards. It achieves rated flow within 10% overpressure, ensuring optimal performance. With a robust construction and fully guided design, it minimises deformation and leakage, incorporating stainless steel trim for enhanced durability. Assembled from standardised components, this valve allows for easy maintenance. The springs conform to BS1726 class A specifications, providing a clean opening, stable performance, and reliable positive closing. 

Product Specifications

Size Options: 3/8", 1/2", 3/4", 1"
Connections: Screwed BSPP or NPT
Materials:
- Nozzle: Stainless Steel
- Spring Bonnet: Stainless Steel
- Disk: Metal
- Joints & Seals: NBR, FPM, EPDM (varies by model)
Head Type: A (Gas-tight Lever)
Medium Compatibility: Steam, Gases, and Liquids
Set Pressure Range: 0.05 to 500 Barg (dependent on size)
Temperature Range: -60 to 280 °C
Additional Information: We offer various other variants (please refer to downloads) featuring alternative (a) O-ring and disk materials, (b) NPT connections, (c) orifice sizes, and (d) head types. For further details, kindly get in touch with us.