Valfonta VD Pressure Reducing Valve

**Product Specification** **Sizes Available:** 1/2", 3/4", 1", 1 1/4", 1 1/2", 2", 2 1/2", 3", 4" **Connections:** Flanged DIN or ANSI **Head Type:** C (Gas Tight Cap) **Materials Used:** - SG Iron for sizes up to 1" (Model 30.1) - Carbon Steel for sizes from 1 1/4" to 4" (Model 30.1) **Disk Options:** Metal, Viton or Nylon (depending on pressure requirements) **Joints & Seals:** NBR, FPM, EPDM (model-dependent) **Suitable Mediums:** Steam, Gases, and Liquids **Set Pressure Range:** 0.05 to 40 Barg (utilising multiple springs) **Temperature Specifications:** - Model 30.1: -10 to 280°C - Model 30.2: -60 to +280°C - Model 30.7: -200 to +280°C **Design Certification:** TUV **Notes:** The temperature range is applicable for valves equipped with a metal disk. For models 30.1 and 30.2, the temperature specifications may vary based on body size. Optimise your systems with our versatile and reliable valves, crafted to meet the highest standards for pressure and temperature applications. Perfect for a variety of industries, including manufacturing and energy, our products ensure safety and performance in steam, gas, and liquid environments. Explore our comprehensive range today!

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

•Allows for the drainage of the system without the need to remove pipework
•Prevents sediment accumulation
•Enhances the longevity of pipework

Specification

•90º operation. Available sizes range from 1/2" to 1", supplied complete with cap and strap.
•Plugs feature square heads with a slot to indicate the plug's position.
•Malleable iron levers can be provided upon request.
•The malleable iron lever can be pinned to the plug head for an additional charge.
•Fitted with taper threads as per BS EN 10226 (ISO 7-1), formerly known as BS 21.
•Please note: Figure 81HU Gland Cocks are not suitable for gas applications.

Pressure/Temperature Rating

•Rated for 10 bar at temperatures ranging from 0 to 120ºC