U Bolt Gate Valve

Description

U-BOLT TYPE 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
Alternative materials available upon request.

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
Seat Seal Bronze seat face for wear and corrosion resistance
Flow Direction Bi-directional
Operation Handwheel Manual – Clockwise to Close
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)
Inspection & Approval API 598, API 6D
6. PRESSURE TEST (PER API 598)

Test Type Pressure Medium Duration
Shell (Hydrostatic) 200% Class Rating Water As per API 598
High Pressure Seat Test 1.1 × Rated Pressure Water As per API 598
Low Pressure Seat Test 5–6 bar / 80–90 psi Air or Nitrogen As per API 598
100% hydraulic test with shell and seal, and low pressure air test performed on every valve.

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
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
For detailed dimensional data per size, please refer to MSS SP-70 or contact the manufacturer.

9. OPTIONAL UPGRADES

Option Description
Packing Material PTFE (Optional)
Body Material Ductile Iron ASTM A395 / A536
Special Materials Other materials available upon request
10. QUALITY CONTROL

100% chemical analysis and mechanical test with raw materials of each heat number
100% DPT test with castings; partly MT or UT test; RT always available if required
100% hydraulic test with shell and seal and low pressure air test
11. WARRANTY

12 months service life at minimum; free spares and maintenance instruction provided when required.

This technical data sheet is for reference purposes only. All specifications are subject to change without prior notice. For specific project requirements, please consult the manufacturer.