Valfonta S1 Steam Pressure Sustaining Valve

Four-port, electroless nickel-plated forged brass, single-stage regulator for highly corrosive gases

The CONCOA 455 Series regulator is designed for primary pressure control of highly corrosive gases such as chlorides, sulfides, and other acid-forming gases. It features a Dursan®-coated capsule and diaphragm, providing superior corrosion resistance compared to 316L stainless steel or exotic metals like Hastelloy®. For fluorine service, a passivated stainless steel CAPSULE® and diaphragm create a fully resistant assembly. Deep purge assemblies are recommended to prevent moisture from forming acids in the gas stream.

Features:

• Dursan® internals for enhanced corrosion resistance

• CAPSULE® seat with 360° integral filtration

• Captured vent protects against diaphragm failure

• Spectrometric helium leak-checked for integrity

Specifications:

• Max inlet pressure: 3000 PSIG (210 BAR)

• Body/Bonnet: Electroless nickel-plated forged brass

• Gauges: 2½ in (63 mm) Monel®

• Seat: PTFE

• Nozzle: 316L stainless steel (passivated) or Dursan® (non-passivated)

• Filter: 10-micron stainless steel or Dursan® mesh

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

• Diaphragm: 316L stainless steel (passivated) or Dursan® (non-passivated)

• Cv: 0.2

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

• Ports: 1/4 in FNPT

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

Product Specification

Sizes: 1"

Connections:

• Inlet: Flanged DIN or ANSI RTJ
• Outlet: Screwed BSPP or NPT

Materials: Stainless Steel (22.2)

Disk Options: Metal, PEEK, or Vespel (depending on pressure requirements)

Joints & Seals: FPM, PTFE

Medium Compatibility: Suitable for Steam, Gases, and Liquids

Set Pressure Range: 100 to 1100 Barg

Temperature Range: -60 to +350°C

Design Notes:

Discover our high-performance valves designed to provide exceptional durability and reliability for various industrial applications. Our products feature a range of connections including Flanged DIN and ANSI RTJ for inlet, as well as screwed BSPP or NPT for outlet, ensuring compatibility with your existing systems. Constructed from robust stainless steel, our valves can handle a wide array of mediums including steam, gases, and liquids, making them the perfect choice for your operational needs.

With precise pressure set points ranging from 100 to 1100 Barg and a broad temperature range from -60 to +350°C, our valves are designed to perform under demanding conditions. Available disk options, including metal, PEEK, or Vespel, allow for customisation based on pressure specifications. Trust in our premium Joints and Seals made from FPM and PTFE to ensure optimal performance and longevity.

Upgrade your systems with our reliable valves and experience unparalleled efficiency and safety in your operations.

The FSKRDA rupture discs use advanced sector technology, ensuring the convex disc camber remains unchanged by operating pressure until reverse pressure is reached. Designed for high reliability, they handle up to 95% operating-to-burst pressure ratios and thousands of cycles without compromising performance. On activation, the disc opens fully along the scored line within milliseconds, without fragmentation. These discs are less sensitive to temperature variations, making them ideal for applications with wide thermal swings.

Their innovative design allows safe use with liquids only, including cycling and pulsating conditions, without reducing safety margins. They are particularly suitable for isolating safety valves. A wide range of materials and thicknesses provides excellent corrosion resistance, further enhanced with optional PTFE linings. Vacuum support is not required, and the discs can withstand high counter-pressures.

Specifications:

• Sizes: 1" (DN25) to 36" (DN900)

• Materials: Stainless steel, Alloy 201, 400, 600, C276, Titanium

• Rupture Pressure: 0.41–137 bar g (6–2000 psi g)

• Krl: 0.48

• Tolerance: ±5% to ±20%

• Temperature Range: –196°C to 480°C

• Operating Margin: 90–95%

• Fragmentation: None

• Use Under Valve: Yes

• Corrosion Resistance: Very good

• Linings: Optional PTFE

• Holder Options: FSHR/A, FSHR/P, FSHR/F, FSHTC

• Rupture Sensor: Electrical, Magnetic, Inductive, Optical

• Certifications: ASME (UD Stamp), PED (CE), ATEX EX II 2 GD

• Notes: Compliant with ASME Section VIII, Division 1 requirements