FSLPDDW - Double Way Rupture Discs

FSLPDDW - Double Way Rupture Discs

The FSLPDDW Double Way Rupture Discs are sophisticated composite conventional discs constructed from four key components: a slotted, perforated metal section, a sealing membrane (typically made from PTFE, but also available in various metallic and non-metallic materials), a protective section, and a calibration ring. Designed to be installed between flanges, these discs are ideal for use with gases and liquids in static conditions, particularly at low pressures. The FSDIFDW discs promptly react to excessive pressure, achieving complete opening within milliseconds, making them an excellent choice for valve protection. Vacuum or counter-pressure support options are also available. Additionally, composite rupture discs offer simultaneous protection from both pressure and vacuum.

Specifications

Sizes: Ranging from 2" (DN50) to 40" (DN1000)

Materials: Available in Stainless Steel, Alloy 201, Alloy 400, Alloy 600, Alloy 625, Alloy C276, Titanium. Membrane options include PTFE, PFA, Stainless Steel, and Aluminium.

Rupture Pressure: Between 0.5 - 5 bar g (varies by material and diameter)

Krl:

Tolerance: +/- 5% to +/- 20%

Temperature: PTFE/PFA membrane maximum temperature up to 265°C, or up to 480°C depending on the membrane type

Operating Margin: Up to 70%

Vacuum Support: Not Available

Fragmentation: None (membrane only)

Installation under Valve: Yes

Corrosion Resistance: Good - can be enhanced with a PTFE membrane

Linings: Yes

Container: Installed between flanges

Rupture Sensor Options: Electrical, Magnetic, Inductive, Optical

PED Certification (CE Mark): Available

ATEX EX II 2 GD Certification: Available

To request our Rupture Disc Request Form, please download it, complete it, and send it to sales@flowstar.co.uk.

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Other Products and Services from Flowstar (UK) Ltd

VALPRES Split Body Ball Valves - Direct Mount PN16 / PN40 / ANSI 150

VALPRES Split Body Ball Valves - Direct Mount PN16 / PN40 / ANSI 150

Introducing the Valpres 76 Series ISO Direct Mount Split Body 2-Piece Full Bore Ball Valve, designed for superior performance and reliability. This valve features a robust stainless steel ball and stem, complemented by P.T.F.E. seats and P.T.F.E./Graphoil/FKM seals. Engineered to meet stringent safety standards, it is antistatic and firesafe in accordance with BS6755 Part 2, API Specification 6FA, and ISO 10497. Additionally, it boasts ATEX II 2GD T3 approval for use in potentially explosive environments.

The end connections are flanged and drilled for PN16, PN40, and ANSI 150 standards, ensuring compatibility with a variety of systems. This lever-operated valve is equipped with an Open/Closed locking device (padlock not included) for enhanced operational security.

Specification:

  • Size Range: 1” to 4”
  • Body Materials: Available in Carbon Steel or Stainless Steel
  • End Connections: PN16 (all sizes), PN40 (1” to 2”), ANSI 150 (all sizes)
  • Valve Options: Valves can be fitted with a V ball for flow control. Various seat materials are available to accommodate a wide range of applications.

Enhance your industrial processes with the Valpres 76 Series ball valve, the reliable solution for all your fluid control needs.

Spirax Sarco DP27 Pilot Operated Pressure Reducing Valve (Screwed BSP)

Spirax Sarco DP27 Pilot Operated Pressure Reducing Valve (Screwed BSP)

The Spirax Sarco DP27 is a sophisticated pilot-operated pressure reducing valve, expertly engineered for steam and compressed air applications. This valve ensures precise control of downstream pressure, maintaining accuracy regardless of fluctuations in upstream pressure or variations in load. The DP27 is available with BSP connections in sizes of 1/2", 3/4", and 1", boasting a robust SG Iron body and a single control spring that regulates downstream pressures ranging from 0.2 to 17 Barg.

Specifications:

  • Sizes: 1/2", 3/4", 1"
  • Connections: Female BSPP Inlet x Female BSPP Outlet
  • Materials: SG Iron
  • Maximum Inlet Pressure: 25 Barg
  • Outlet Pressure Range: 0.2 Barg to 17 Barg
  • Temperature: Up to 232°C

For reliable performance in controlling pressure for your steam or compressed air systems, the Spirax Sarco DP27 valve is an ideal choice for your needs.

FSSCDA - ASME approved Rupture Discs

FSSCDA - ASME approved Rupture Discs

The FSSCDA rupture disc features precision micro-scored petals with four, six, or more radial scores, ensuring fast, controlled opening while minimising the risk of petal separation. This design makes the disc particularly suitable for high burst pressure applications. It can be used with both gases and liquids, including under cycling and pulsating conditions, without reducing safety margins. In an overpressure event, the disc activates within milliseconds and opens cleanly without fragmentation, making it ideal for protecting safety relief valves.

The FSSCDA supports an operating-to-burst pressure ratio of up to 85% and offers excellent corrosion resistance, which can be further enhanced with an optional PTFE lining. In many applications, the disc can also operate under full vacuum conditions without the need for support, providing added flexibility. These discs comply fully with ASME Section VIII, Division 1 requirements.

Key Specifications:

  • Sizes: 1" (DN25) to 36" (DN900)

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

  • Burst Pressure Range: 2–413 bar g (30–6000 psi g), depending on size and material

  • Krl: 1.33

  • Tolerance: ±5% to ±20%

  • Temperature Range: –196°C to 600°C

  • Operating Margin: Up to 85%

  • Fragmentation: None

  • Use Under Valve: Yes

  • Corrosion Resistance: Very good

  • Linings: Optional

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

  • Rupture Detection: Electrical, Magnetic, Inductive, Optical

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

Flowstar UK Ltd

Flowstar (UK) Ltd

Wiltshire Road, Kingston-upon-Hull, East Riding of Yorkshire, HU4 6PA, United Kingdom

Flowstar (UK) Ltd is a leading global supplier of safety, relief, and reducing valves. With strong partnerships across major manufacturers, we deliver precise, reliable valve solutions tailored to your needs. Email enquiries to sales@flowstar.co.uk or call us on +44 (0)1482 601030.