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

U-Bolt Type Gate Valve Threaded

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Description

TECHNICAL DATA SHEET: U-BOLT TYPE GATE VALVE

PARAMETER SPECIFICATION
1. General
– Valve Type Split-Body Gate Valve (U-Bolt Design)
– Connection Type Flanged Ends with U-Bolt Fastening
– Nominal Size 3″ (DN 80)
– Pressure Rating 125 LB (ASME Class 125)
– Operation Handwheel Manual
2. Material Specification
– Body & Bonnet ASTM A126 GR.B Grey Cast Iron
– Wedge (Gate Disc) ASTM A126 GR.B Grey Cast Iron
– Stem ASTM A182 F410 / 410 SS (Hardened Stainless Steel)
– U-Bolts Carbon Steel, Grade 4.6 (Zinc-Plated for Corrosion Protection)
– Gasket EPDM-Encapsulated Metal Ring (Body Joint Seal)
3. Design Features
– Body Construction Two-Piece Split Body, secured by U-Bolts
– Stem Design inside screw and yoke
– Seat Seal bronze
– Packing Braided Graphite (Standard) / PTFE (Optional)
4. Standards
– End Dimensions ASME B1.20.1
– Face-to-Face MSS SP-70
– Pressure Test API 598 (200% Class Rating Hydrostatic Test)
– U-Bolt Standard ASME B18.2.1 (Heavy Hex Nuts Included)
5. Performance Data
– Temperature Range -29°C to 200°C (Seat/Packing Limited)
– Max. Working Pressure 19 bar @ 100°C
– Flow Direction Bi-directional
– Leakage Class Class B per API 598
6. Dimensions & Weight
– Face-to-Face (L)
– Flange OD
– Handwheel Dia.
– U-Bolt Size
– Approx. Weight
7. Key Advantages
– Maintenance-Friendly Split body allows in-line repair/cleaning without pipe disassembly
– Robust Sealing U-bolts ensure uniform gasket compression under vibration
– Stem Integrity 410 SS stem resists galling/jamming in silt/slurry services

CRITICAL DESIGN NOTES:

  1. U-Bolt Fastening System

    • Two heavy-duty U-bolts clamp body halves vertically, enabling quick dismantling for wedge/seat maintenance.

    • Zinc-plated finish prevents rust in humid environments.

  2. Material Compatibility

    • Cast iron body meets Class 125 pressure but requires protection against water hammer/thermal shock.

    • 410 SS stem provides 2x higher yield strength than bronze stems.

  3. Installation & Operation

    • Install in horizontal pipes only (U-bolts must be vertical to avoid uneven load).

    • Handwheel rotation: Clockwise to close (CW).

OPTIONS & UPGRADES:

  • Stem Material: 17-4PH SS (H₂S service)

  • Seat Material: 13Cr Stainless Steel (for abrasive media)

  • Gasket: Spiral Wound (316SS/Graphite) for thermal cycling

  • U-Bolt Material: 304 SS (corrosive environments)