Hattersley Fig MH733 PN16 Double Regulating Valve

The FSDIFULP Ultra Low Pressure Rupture Discs are composite conventional discs formed by four parts: a slotted, perforated metal part a seal membrane (usually in PTFE but also available in many other metallic or non-metallic materials) a protection section a calibration ring This disc has been designed to be mounted between flanges. It is excellent for use with gas and liquids in static conditions and excellent for low pressures. FSDIFULP discs react to excessive pressure with total opening in a few milliseconds. They are therefore recommended for valve protection. Supports may be provided for vacuum or counter-pressure protection. Composite rupture discs may also be used for simultaneous protection from pressure and vacuum.

Specification

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

Materials: Stainless steel, Alloy 201, Alloy 400, Alloy 600, Alloy 625, Alloy C276, Titanium

Rupture Pressure: 0.5 - 5 bar g (depending on material and diameter)

Krl: 

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

Temperature: membrane in PTFE/PFA max 265°C, up to 480°C (depending on the membrane)

Operating Margin: Up to 70%

Fragmentation: No (membrane only)

Use under valve: Yes

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

Linings: Yes

Container: Mounted between flanges 

Rupture Sensor: Electrical, Magnetic, Inductive, Optical

PED Certification (CE Stamp): Available

ATEX EX II 2 GD Certification: AvailableDownload our Rupture Disc Request Form and once completed please send to sales@flowstar.co.uk. 

The AURA EXS is a high-precision single-stage regulator designed for sub-atmospheric control and low-flow positive pressure applications. Its innovative hybrid spring system, paired with an oversized dual-surface diaphragm, allows for precise pressure regulation ranging from 0 psia to 100 psig, delivering exceptional accuracy in both vacuum and positive pressure scenarios. Central to the EXS is AURA's unique encapsulated seat design, which combines multiple moving parts into a single assembly. This groundbreaking design simplifies maintenance, reduces potential failure points, and ensures long-lasting reliability. The regulator features a 10-micron, 360° filter that offers superior impurity removal, far surpassing that of standard pressed-in discs. Unlike conventional regulators that only filter at the pipeline port, the EXS provides comprehensive protection across all inlet ports. Each EXS regulator is meticulously assembled in a Class 100 cleanroom as a complete unit, with all gauges, valves, and fittings pre-installed. The assembly undergoes thorough cleaning for oxygen service, is 100% helium leak tested, and is subjected to rigorous flow and functional testing to meet the most demanding application requirements. For particularly aggressive environments, the EXS can be equipped with Dursan® LS inert coating technology, which ensures exceptional resistance to acidic and caustic media, often outperforming more exotic alloys. Combining precise control, robust construction, and advanced corrosion resistance, the AURA EXS stands out as the perfect choice for engineers seeking reliable solutions for sub-atmospheric and low-flow applications.

Features & Benefits

• Our double check valves are expertly designed to mitigate the risk of backflow and back siphonage contamination in domestic homes, public facilities, and commercial properties.

• Certified by WRAS for utilisation with wholesome (potable) water, functioning effectively at temperatures up to 85°C.

• The compression variant comes with ends that meet the BS EN 1252-2 standard, suitable for use with BS EN 1057 R250 (half hard) copper tubes or female taper threads in accordance with BS EN 10226-2.

• The shell pressure rating for Fig. 250W and Fig. 250CW is PN16, accommodating a maximum inlet/working pressure of 10 Barg.

• Fully compliant with BS EN 13959, our double check valves are part of the ‘Anti-pollution check valves’ family, type E, class D.

Specifications

Pressure/Temperature Rating

• Shell Pressure Rating: PN16

• Maximum Temperature: 85°C (WRAS Approved up to 85°C)