U-Bolt Type Gate Valve
U-Bolt Type Gate Valve - Image 2
U-Bolt Type Gate Valve - Image 3
U-Bolt Type Gate Valve - Image 4

U-Bolt Type Gate Valve

Categories: ,

Description

U-Bolt Type Threaded Gate Valve Technical Data Sheet

Project Name: ________________________
Project No.: ________________________
Tag No.: ________________________
Date: ________________________

1. Valve General Information

Parameter Specification
Valve Type U-Bolt Type Gate Valve
Body Construction Two-Piece Split Body, secured by U-Bolts
End Connection Threaded – Female Threaded Ends
Nominal Size (DN / NPS) ______ mm / ______ inch (1/2″ to 4″)
Pressure Rating (PN / Class) Class 125 / Class 250
Thread Standard ASME B1.20.1 (NPT)
Face-to-Face Length MSS SP-70
Design Standard MSS SP-70
Test Standard API 598 / MSS SP-70

2. Materials of Construction

Component Material
Body ASTM A126 Gr.B Grey Cast Iron / Ductile Iron ASTM A395 / A536
Bonnet ASTM A126 Gr.B Grey Cast Iron
Wedge (Gate Disc) ASTM A126 Gr.B Grey Cast Iron with Bronze Seat Face
Seat Bronze – Threaded or Inlaid Type
Stem ASTM A182 F410 Stainless Steel (410 SS)
U-Bolts Carbon Steel (Grade 4.6) , Zinc-Plated
Gasket EPDM-Encapsulated Metal Ring
Packing Braided Graphite (Standard) / PTFE (Optional)
Handwheel Cast Iron / Malleable Iron

3. U-Bolt Connection Design Features

Feature Description
Fastening System Two heavy-duty U-bolts clamp body halves vertically, enabling in-line maintenance for wedge/seat without pipe disassembly
Installation Advantage Provides secure connection in space-constrained piping systems; allows quick assembly and disassembly
Sealing Reliability U-bolts ensure uniform gasket compression under vibration, preventing leakage
Corrosion Protection Zinc-plated U-bolts prevent rust in humid environments

4. Design Features

Feature Description
Bonnet Type Bolted Bonnet
Stem Design OS&Y (Outside Screw and Yoke) – Rising Stem
Wedge Type Solid Wedge
Port Type Full Bore / Reduced Bore Optional
Seat Seal Bronze seat face for wear and corrosion resistance
Flow Direction Bi-directional

5. Applicable Standards & Specifications

Item Standard
Design & Manufacturing MSS SP-70
Face-to-Face Dimensions MSS SP-70
Threaded Ends ASME B1.20.1 (NPT)
Pressure Testing API 598
U-Bolt Standard ASME B18.2.1 (Heavy Hex Nuts Included)

6. Pressure Test (API 598)

Test Type Pressure Medium Duration
Shell (Hydrostatic) 200% Class Rating Water As per API 598
High Pressure Seat Test 1.1 x Rated Pressure Water As per API 598
Low Pressure Seat Test 5-6 bar / 80-90 psi Air or Nitrogen As per API 598

7. Performance Data

Parameter Specification
Service Medium Water, Oil, Gas, Non-Corrosive Fluids
Design Temperature -29°C to 200°C (Seat/Packing Limited)
Max. Working Pressure Class 125: 19 bar @ 100°C
Leakage Class API 598 Class B
Operation Handwheel Manual – Clockwise to Close
Installation Position Horizontal pipes only – U-bolts must be vertical to avoid uneven load

8. Dimensions & Weight (Reference Only)

Dimension Value (mm)
Face-to-Face Length L _____ (Per MSS SP-70)
Overall Height H (Closed) _____
Overall Height H (Open) _____
Handwheel Diameter _____
U-Bolt Size _____
Approx. Weight _____ kg

9. Optional Upgrades

Option Description
Stem Material 17-4PH Stainless Steel (H₂S service)
Seat Material 13Cr Stainless Steel (for abrasive media)
Gasket Spiral Wound (316SS/Graphite) for thermal cycling
U-Bolt Material 304 Stainless Steel (corrosive environments)

Notes:

  1. U-Bolt connection design allows in-line maintenance without pipe disassembly, ideal for applications requiring frequent servicing .

  2. During installation, ensure U-bolts are vertical to prevent uneven loading and leakage .

  3. Cast iron body is sensitive to water hammer and thermal shock; avoid rapid operation.

  4. Dimensions must be confirmed based on specific size and pressure rating requirements.

Related products