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Подземный полностью сварной шаровой кран

Direct Buried Fully Welded Gas Ball Valve

Подземный полностью сварной шаровой кран

Design and manufacturing: GB/T 12237
The structural length:GB/T 12221
Connection forms:JB / T 79.1
Inspection and test:GB / T 26480
Caliber: 1/2″ ~ 48″ (DN15 ~ DN1200)
Pressure temporature level:GB / T 9131
Drive mode:Worm Gear
Pressure: PN1.6 MPa ~ PN42.0 MPa Class 150 ~ Class 2500

Product Overview

A direct buried fully welded gas ball valve is designed for underground natural gas pipelines where long-term sealing reliability and zero maintenance are critical. Featuring a fully welded body with no external flange joints, it eliminates leakage risks and resists soil corrosion, ground movement, and environmental stress. The valve is typically equipped with an extended stem for buried installation, offers excellent shut-off performance, and supports high-pressure gas transmission with minimal pressure loss. Widely used in urban gas networks, transmission pipelines, and buried gas systems, this valve delivers long service life, high safety, and dependable isolation for modern gas infrastructure.

Product Features

  • Fully welded body design eliminates flange leakage and ensures long-term sealing reliability
  • Specifically engineered for direct buried and underground natural gas pipeline applications
  • Excellent shut-off performance with low operating torque and minimal pressure loss
  • Extended stem design allows safe operation and maintenance above ground level
  • High resistance to corrosion, soil stress, and ground movement for long service life
  • Suitable for high-pressure gas transmission and urban gas distribution systems
  • Low maintenance, high safety, and reliable performance in buried gas pipeline networks

Specification Parameters

Material for Main Part:

No.NameMaterialNo.NameMaterial
1CapASTM A10521Thrust bearingsPTFE
2BodyASTM A10522Slide bearings304 + PTFE
3SphereASTM A105 + ENP23Support seatASTM A105
4Anti-static springAssembly24O-ringVITON
5Thrust bearingsPTFE25O-ringVITON
6Slide bearings304 + PTFE26Y-ringVITON
7Lower stemASTM A10527Fire padSS304 + Graphite
8Bottom coverASTM A10528FillerGraphite
9Drain valveASTM A105 + ENP29Socket head cap screwsASTM A193 B7
10O-ringVITON30Socket head cap screwsASTM A193 B7
11Fire padSS304 + Graphite31Valve stemASTM A182 F6a
12Socket head cap screwsASTM A193 B732Cylindrical pin35
13FootstepsA333StudsASTM A193 B7
14SeatPPL34NutASTM A194 2H
15Seat fire padSS304 + Graphite35Spring washer65Mn
16Spring support seatASTM A10536LandASTM A105
17Spring17-7PH37Flat key45
18O-ringVITON38TurbineASTM A105-HZn
19Seat support ringASTM A105 + ENP39Vent valveASTM A105-HZn
20Slide bearings304

Specification Applications

  • Underground natural gas transmission and distribution pipelines
  • Direct buried gas pipeline systems in urban and residential areas
  • High-pressure gas networks for long-distance pipeline projects
  • City gas supply systems requiring zero leakage and high safety
  • Industrial gas pipelines in petrochemical and energy facilities
  • Gas isolation and shut-off points in buried pipeline installations
  • Infrastructure projects where low maintenance and long service life are required

Управление потоком

Решения для трубопроводных систем

Промышленные клапаны

Приводы клапанов

Оптимизация технологических процессов

Высокоточная инженерия

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