Fully Welded Stationary Worm Actuated Ball Valve

1. Main structural features
Mounted on a trunnion

Upper and lower shaft support structure, working torque is reduced by 40%

Double piston valve seat, bi-directional seal (API Class 6D A)

HVOF tungsten carbide coating on the surface of the ball (hardness ≥ HRC70)

Fully welded valve body

Composite Submerged Arc Welding (SAW) Process for Argon Arc Welding (TIG)

100% X-ray inspection (RT)

Heat Treatment for Stress Relief After Welding (SR Treatment)

Worm gear system

Secondary worm gearbox (gear ratio 1:30/1:50 optional)

Self-locking function (saving any opening position)

IP68 protection level (optional for submersible type)

2. Typical Applications
Energy

Gas trunk pipeline (e.g., China-Russia eastern line)

High-pressure alcohol injection system for shale gas production

CNG receiving station (-162°C working condition)

Urban infrastructure

Regional Heating Network (PN25/150°C)

Complete Pipeline Corridor Gas Pipeline

Nuclear Power Plant Cooling Water System

3. Performance Benefits
Adaptability to extreme working conditions

Seismic Performance: Meets IEEE 693-2005 standard

Sulfur Resistant Design: NACE MR0175 Certification

Fire Safety: API 607/ISO 10497 Certified

Intelligent operation and maintenance characteristics

Optional:

Torque Sensor (4-20mA Output)

Valve position indicator (with remote transfer function)

Intelligent lubrication system (automatic lubrication injection)

Economic indicators

Flow resistance coefficient ≤ 0.05 (15% energy savings compared to gate valves)

Maintenance-free period ≥ 10 years

Reduce lifecycle costs by 30%