Bailey 616D Safety Relief Valve

The FSSCDN Nanoscored rupture disc features precision micro-scored petals with four, six, or more radial scores, ensuring rapid, controlled opening while minimizing the risk of petal separation. This design makes the disc particularly well suited for high burst pressure applications and demanding operating environments.

Engineered for use with gases and liquids, the FSSCDN performs reliably under cycling and pulsating conditions without compromising safety margins. In the event of overpressure, the disc activates within milliseconds and opens cleanly without fragmentation, making it an excellent solution for protecting safety relief valves.

The disc 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 installations, the disc can also withstand full vacuum conditions without the need for additional supports, providing greater installation flexibility.

Key Specifications:

• Sizes: 1" (DN25) to 36" (DN900)

• Materials: Stainless steel, Alloy 201, 400, 600, 625, 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

**Stainless Steel Expansion Vessel for Potable Water Applications** Introducing the Reliance Valves Aquasystem Replaceable Membrane Potable Water Expansion Vessels, expertly designed to manage the additional load within your water system during the heating process, when water expands in volume. These expansion vessels play a crucial role in maintaining safe operating levels by averting pressure build-up in both sealed heating and cold water systems. Featuring a replaceable membrane, our vessels prevent water from coming into contact with the steel shell, effectively stopping corrosion and contamination, thus ensuring the water remains safe for human consumption. The replaceable membrane allows for convenient servicing in situ, eliminating the need to remove the vessel for maintenance. ### Features and Benefits: - **Corrosion-Resistant**: The stainless steel bolted flange ensures enhanced durability and corrosion prevention. - **Noise Reduction**: An extra wide membrane opening mitigates noise caused by restricted flow, ensuring a quieter system. - **Internal Protection**: The internal membrane provides a barrier, preventing any water contact with the steel shell and eliminating internal corrosion. - **Comprehensive Range**: Available in sizes from 2 to 5000 litres, catering to all applications. - **Effortless Servicing**: Each unit is supplied with a replaceable membrane, allowing for easy servicing without removal. - **Convenient Pre-Charge**: Equipped with a pre-charge valve for easy topping up of air pressure. - **Hot and Cold Water Compatible**: Suitable for use with both hot and cold water systems. ### Specification: - **Capacity**: 1000 Litres - **Colour**: Red - **Pre-Set Pressure (Bar)**: 4 - **Max Pressure (Bar)**: 10.0 - **Minimum Temperature**: -10°C - **Maximum Temperature**: 99°C - **Height**: 2160mm - **Diameter**: 800mm - **Water Connection**: 2" MBSP - **Product Code**: XVES050170 **Materials**: - Shell: Epoxy Coated - Membrane: EPDM - Bolted Flange: Stainless Steel **Standards and Approvals**: - WRAS approved for capacities up to 1000 litres - CE marked in accordance with Directive PED 97/23/CE - TÜV Certified - Materials for 1000 - 5000 litre models comply with BS 6920 Ensure the safety and efficiency of your water system with our high-quality stainless steel expansion vessels, designed for reliability and performance.

The FSKRDN NanoScored rupture disc incorporates advanced technology to deliver highly reliable overpressure protection. The convex disc maintains its original shape during normal operation and only reverses at the set burst pressure. It supports operating-to-burst pressure ratios of up to 95% and withstands thousands of pressure cycles without loss of performance. When activated, the disc opens fully in milliseconds along the scored line, producing no fragments. Compared with conventional designs, it is less sensitive to temperature fluctuations, making it ideal for applications with wide temperature variations.

Thanks to its innovative construction, the FSKRDN can operate with liquids only, including in cycling and pulsating conditions, without compromising safety margins. It is particularly well suited for isolating safety relief valves. A wide selection of materials and optimized thickness provide excellent corrosion resistance, which can be further enhanced with an optional PTFE lining on the process side. The disc does not require vacuum support and is capable of withstanding high back pressures.

Key Specifications:

• Sizes: 1" (DN25) to 36" (DN900)

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

• Burst Pressure Range: 0.41–137 bar g (6–2000 psi g), depending on size and material

• Krl: 0.48

• Tolerance: ±5% to ±20%

• Temperature Range: –196°C to 480°C

• Operating Margin: 90% (up to 95% depending on service conditions)

• Fragmentation: None

• Use Under Valve: Yes

• Corrosion Resistance: Very good

• Linings: Optional

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

• Rupture Detection: Electrical, Magnetic, Inductive, Optical

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