Medenus R101US Gas Pressure Relief Valve

The FSSCRN Nanoscored rupture disc is a compression or reverse-acting disc featuring precision micro-scored petals with four, six, or more radial scores. This design ensures fast, controlled opening while significantly reducing the risk of petal separation. Suitable for both low and high burst pressure applications, the FSSCRN performs reliably with gases and liquids when a gas cushion is present, even 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 ideal for protecting safety relief valves. It supports an operating-to-burst pressure ratio of up to 95% and delivers 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 additional supports, offering greater installation flexibility.

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

**Features & Benefits of Our Durable Valves** - Constructed from robust ductile iron, our valve bodies ensure an extended service life. - The high-strength stainless steel disc enhances durability, making these valves suitable for a diverse range of applications. - The fully-lugged valve body guarantees secure installation, providing peace of mind. - Designed with an integrated notch plate for a compact architecture, saving space without sacrificing quality. - The innovative anti-blow-out stem design ensures safe and reliable operation. - Our valves are coated with a fully bonded epoxy paint system, offering superior protection against corrosion. - Ideal for environments that require Level 3 C3 (Medium) corrosion resistance. - The maintenance-free design significantly reduces downtime, ensuring efficient performance. **Specification Details** - Conforms to BS EN 593 standards for dependable quality. - The body is constructed of ductile iron with an epoxy finish for enhanced resilience. - Face-to-face dimensions adhere to BS EN 558 standards. - Features a robust stainless steel disc and an EPDM liner for optimal performance. - Designed to suit flange connections as per BS EN 1092-2 PN16 specifications. - Our valves can be employed for effective flow regulation. - Models Fig. 4970 and 4970G are compliant with Group 2 liquid requirements set by the Pressure Equipment Directive 2014/68/EU. **Pressure/Temperature Ratings** - Capable of withstanding pressures of up to 16 bar across a temperature range of -10°C to 130°C. Ensure the longevity and reliability of your systems with our expertly designed valves, perfect for a multitude of industrial applications.

## Features and Benefits - Offers precise and accurate flow regulation - User-friendly operation with a handwheel and numerical indicator - Durable bronze construction for an extended service life - WRAS approved for use with drinking water up to 85°C - Ensures positive flow control across all handwheel settings ## Specifications - Kitemarked to BS 7350:1990 - Handwheel operated for ease of use - FOCS numerical indicator included - Non-rising handwheel with inside screw - Characterised regulating disc for optimal performance - Flow charts are readily available - Threaded end connections ### Size Options - Available in sizes 1" to 2" with taper-threaded connections compliant with BS EN 10266 (ISO 7-1, previously BS 21) - Available in sizes ½" and ¾" with ISO 228 parallel connections - Sizes DN15 and DN20 compatible with compression fittings - Adaptors for copper pipes to BS EN 1057 R250 (half hard) - Recognised as a WRAS approved product ## Pressure/Temperature Ratings ### Threaded Ends - BS 7350 PN20 - 17.2 bar at 120ºC - 20 bar from -10°C to 100°C ### Compression Ends - 5 bar at 120ºC - 6 bar at 110ºC - 10 bar at 65ºC - 16 bar from -10°C to 30°C - WRAS approval temperature range: -10°C to 85°C This expertly crafted product ensures reliable flow regulation for a variety of applications. With its notable durability and WRAS approval, it stands as an excellent choice for both commercial and residential settings.