COI TECH SLK Type D Safety Valve

The CONCOA 405 Series four-port brass regulator provides secondary pressure control for ultra-high purity inert gases, ideal for point-of-use applications and precise delivery to instruments. It allows accurate monitoring and adjustment of outlet pressure while maintaining high gas purity.

Features

• Metal-to-metal diaphragm seal to prevent contamination

• CAPSULE® seat with integrated 360° filtration

• Pressure ranges from 0–15 PSIG up to 0–500 PSIG

• Front and rear panel mountable for flexible installation

• Pipe-away relief valve for safe venting

• Cleanroom-assembled to eliminate installation contamination

• Captured vent-capable bonnet prevents exposure in the unlikely event of diaphragm failure

• Helium leak integrity verified

Specifications

• Maximum inlet pressure: 3000 PSIG (210 BAR)

• Body and bonnet: Brass barstock

• Gauge: 2 in (50 mm) brass

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

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

• Diaphragm: 316L stainless steel; Cv: 0.1 (≤50 PSIG/3.5 BAR) or 0.2 (>50 PSIG/3.5 BAR)

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

• Helium leak integrity: 1×10⁻⁹ scc/sec

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

Introducing the FSKRDRA Reverse Acting Rupture Discs, a cutting-edge solution utilising the latest technology in the industry. Designed with a unique camber, the convex disc maintains its shape under operating pressure, only altering when reverse pressure is reached. This innovative device operates with pressure ratios of up to 95% between operating and rupture pressure, demonstrating exceptional reliability through thousands of cycles. Upon reversion, the disc ruptures in just a few thousandths of a second along a scored line, ensuring complete opening without any fragmentation. These rupture discs exhibit lower sensitivity to temperature variations compared to traditional discs, making them ideal for applications with significant temperature fluctuations. Their advanced design allows for use solely in liquid applications and in cycling or pulsating conditions, all while maintaining safety margins. Moreover, they are particularly effective for isolating safety valves. With a wide selection of materials and thicknesses, FSKRDRA discs offer excellent resistance to corrosion. For enhanced protection, a PTFE lining can be applied to the process side of the disc. Notably, vacuum support is unnecessary, and these discs are capable of enduring high counter-pressures. ### Technical Specifications: - **Sizes:** From 1" (DN25) to 36" (DN900) - **Materials:** Available in Stainless Steel, Alloy 201, Alloy 400, Alloy 600, Alloy 625, Alloy C276, and Titanium - **Rupture Pressure:** Ranges from 0.41 bar g (6 psi g) to 137 bar g (2000 psi g), depending on the material and diameter - **Krl:** 0.48 - **Tolerance:** +/- 5% to +/- 20% - **Temperature Range:** From -196 °C to 480 °C - **Operating Margin:** Typically 90%, with the potential to reach 95% subject to service conditions - **Fragmentation:** None (will not disintegrate upon bursting) - **Use Under Valve:** Yes - **Corrosion Resistance:** Excellent - **Linings:** Available - **Container Types:** FSHR/A, FSHR/P, FSHR/F, FSHTC - **Rupture Sensor Options:** Electrical, Magnetic, Inductive, Optical - **Certifications:** ASME Certification (UD Stamp), PED Certification (CE Stamp), ATEX EX II 2 GD Certification available For further information and to request a rupture disc, please download our Rupture Disc Request Form. Once completed, kindly send it to sales@flowstar.co.uk. Improve your operational safety and efficiency with the FSKRDRA Reverse Acting Rupture Discs today!

### Product Specifications **Sizes Available:** DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80 **Connections:** Flanged PN25 Inlet x Flanged PN25 Outlet **Materials:** - Body / Bonnet: Brass (up to DN32), Cast Iron (from DN40 onwards) - Disk: Gunmetal - Joints & Seals: Diaphragm made from NBR, Seals made from NBR **Medium Compatibility:** Suitable for gases and liquids such as drinking water, neutral non-viscous fluids, compressed air, nitrogen, and non-combustible gases. **Note:** Not suitable for steam. **Inlet Pressure (Maximum):** 25 Barg **Outlet Pressure Range:** 0.5 to 9 Barg **Cv Range:** **Temperature Rating:** Maximum 100 °C **Approvals:** Compliant with PED 97/23/CE category I **Additional Features:** - Built-in gauge ports - Integral strainer - Minimum pressure drop from inlet to outlet: 1 Barg For further assistance, please utilise our sizing calculator located in the **TECHNICAL INFO** section of the menu bar at the top of this page. Optimise your system's performance with our reliable valves, designed to meet a variety of industrial needs.