30" 150LB U-section Flanged Butterfly Valve
30" 150LB U-section Flanged Butterfly Valve - Image 2
30" 150LB U-section Flanged Butterfly Valve - Image 3
30" 150LB U-section Flanged Butterfly Valve - Image 4

30″ 150LB U-section Flanged Butterfly Valve

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Description

U-Section Double Flange Butterfly Valve

Technical Data Sheet
Model Series: UD / EU2 / BKBUV / LUG-UNIVERSAL

1. Product Overview

The U-Section Double Flange Butterfly Valve is a concentric, resilient-seated valve designed for dead-end service and easy alignment. It features a “U”-shaped body with integral flanges on both ends. Unlike a Wafer valve, it is installed using fully threaded studs that pass through the bolt holes of both pipeline flanges and the valve body. This combines the compact face-to-face length of a wafer valve with the installation stability of a flanged-end valve.

2. Design Standards

  • Design & Manufacture: API 609, EN 593, BS 5155, MSS SP-67

  • Face-to-Face Dimensions: ISO 5752 Series 20 (Short pattern), EN 558-1, DIN 3202 F1

  • Flange Drilling: DIN PN10/16/25, ANSI B16.1 Class 125/150, BS 4504, BS 10 Table D/E, JIS B2212/B2213, EN 1092, AS 2129

  • Top Flange: ISO 5211 (Direct actuator mounting)

  • Testing & Inspection: API 598, ISO 5208, EN 12266 (Shell Test: 1.5 x PN, Seat Test: 1.1 x PN)

3. General Specifications

Parameter Range / Description
Nominal Diameter DN50 – DN2600 (NPS 2″ – 100″)
Pressure Ratings PN6, PN10, PN16, PN25, Class 150
Temperature Range -40°C to +120°C (Dependent on seat material)
Medium Fresh water, seawater, sewage, oils, air, gases, mild chemicals
Connection Type Double flanged / U-Section (Through-bolt design)
Operation Manual (Lever/Gearbox), Pneumatic, Electric
Stem Design Blow-out proof stem

4. Material Specifications

Component Standard & Optional Materials
Body Cast Iron / Ductile Iron (GGG40) / Cast Steel (WCB) / Stainless Steel (CF8/CF8M)
Disc Ductile Iron Ni-Plated / Stainless Steel (SS304, SS316) / Aluminum Bronze / Duplex / Monel
Seat (Liner) EPDM / NBR (Nitrile) / Viton (FKM) / Neoprene / Hypalon / Silicone
Stem Stainless Steel (SS410, SS416, SS304, SS316) / Monel K-500 / 17-4PH
Taper Pin Stainless Steel (SS316, 17-4PH)
Bushings Self-lubricating PTFE / Bronze

5. Key Design Features

  • U-Shaped Body: The body profile allows the valve to be centered between two pipeline flanges using full-length studs. This eliminates the need for tapped lugs and ensures even compression.

  • Dead-End Service: Unlike standard wafer valves, the U-section design allows the valve to be installed at the end of a pipeline (Dead-End Service) without a mating flange on the downstream side, rated up to the full pressure class.

  • Interchangeable Seat: The liner (seat) fully isolates the body from the line fluid. It is designed with an O-ring seal under the flange face and a vulcanized joint with the body, allowing for easy in-field replacement.

  • Self-Adjusting Stem Seal: A multi-lip “U” cup stem seal design automatically adjusts to pressure and temperature variations, preventing external leakage and ingress of contaminants.

  • Positive Disc Connection: The stem and disc are connected via precision taper pins or a square drive, providing positive, non-slip torque transmission.

6. Principal Dimensions (Reference)

*Note: The following are standard dimensions for PN10/16. Always refer to the manufacturer’s certified drawing.*

Nominal Size (DN) L (Face-to-Face mm) H (Overall Height approx. mm) Flange Bolt Circle Dia. (D) No. of Bolt Holes – Dia.
DN150 56 226 240 8-Φ23
DN200 60 260 295 8/12-Φ23
DN300 78 337 400/410 12/16-Φ23
DN400 102 360 515/525 12/16-Φ28
DN600 154 562 725/770 16-Φ31
DN800 190 670 950 20-Φ41
DN1000 216 800 1160/1170 24-Φ37

7. Applications

  • Water & Wastewater: Water treatment plants, distribution networks, sewage treatment, desalination.

  • Marine & Offshore: Ballast water systems, cooling water, fire-fighting systems on ships and platforms.

  • HVAC: Chilled water, hot water, cooling towers.

  • Industrial: Power plants (circulating water), pulp and paper, chemical processing, food and beverage.

8. Ordering Information

To ensure accurate supply, please specify the following:

  1. Size (DN or NPS) and Pressure Rating (PN or Class).

  2. Body/Disc/Seat Materials (and media characteristics).

  3. Flange Drilling Standard (e.g., DIN PN10, ANSI 150).

  4. Operation (Lever, Gearbox, Actuator type and voltage).

  5. Working Temperature.

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