 |
| Quantity: | |
|---|---|
J-VALVES
Design Features
Fully Welded Body Structure:The valve body adopts an integral forging fully welded design without body flanges, completely eliminating external leakage points, making it suitable for buried installation and maintenance-free service.
Gas-Hydraulic Actuator:Uses pipeline natural gas as the power source combined with a hydraulic control system to realize automatic valve operation and emergency shutdown without external power supply.
Trunnion-Mounted Ball Design:The ball is fixed by upper and lower support shafts, ensuring stability under high differential pressure conditions, reducing operating torque and extending service life.
Double Piston Effect Seat (DPE):The seat is designed as a DPE structure to achieve bi-directional sealing. In case of upstream or downstream seal failure, medium pressure pushes the seat tightly against the ball to ensure reliable sealing.
Dual Sealing System:Primary sealing uses high-performance polymers (such as PTFE/nylon), and secondary metal sealing provides fire-safe redundancy in compliance with API 6FA/6FB standards.
DBB/DIB Function Optional:Double Block & Bleed (DBB) or Double Isolation & Bleed (DIB-1/DIB-2) structures are available to meet pipeline isolation and pressure relief testing requirements.
Blowout-Proof & Anti-Static Stem:The stem features an integrally forged blowout-proof structure with a built-in anti-static device to ensure operational safety and explosion-proof requirements.
Technical Specifications
Size Range: NPS 2″ to 56″ (DN50 to DN1400)
Pressure Rating: Class 150 to Class 2500 (PN20 to PN420)
Temperature Range: -46℃ to +425℃
Body/Ball: ASTM A105, A350 LF2, A182 F304/F316, F51/F53 Duplex Stainless Steel
Stem: 17-4PH, A182 F316
Sealing Materials: PTFE, Nylon, PEEK, Metal Hard Seal
End Connections: Fully Welded Ends (BW), Flanged Ends (RF/RTJ)
Actuators: Gas-Hydraulic, Manual, Electric, Pneumatic (Optional)
Design Standards: API 6D, ASME B16.34
Test Standards: API 6D, API 598
Applications
Natural Gas Long-Distance Pipelines: Used for block valves, pig launching/receiving and line segment isolation on main and branch pipelines to ensure safe network operation.
Underground Gas Storage: Key shutoff equipment for injection-production wells and gathering stations, adapting to high-pressure and high-frequency switching conditions.
Offshore Platforms & LNG Facilities: Reliable medium control in marine and low-temperature environments, meeting explosion-proof and maintenance-free requirements.
Petroleum & Chemical Industry: Isolation of high-pressure, high-temperature and corrosive media in refineries and chemical plants.
Advantages & Value
Zero-Leakage Reliability: Fully welded body completely eliminates external leakage risks, and the gas-hydraulic system ensures fast response in emergencies, protecting life, property and the environment.
High Automation: Gas-hydraulic actuator realizes local/remote control, pressure drop rate monitoring, pipeline rupture emergency shutdown and other intelligent functions, improving pipeline operation efficiency.
Extreme Service Adaptability: Stable performance under high-pressure, low-temperature, high-frequency and corrosive media conditions, reducing unplanned downtime and replacement costs.
Combination of Standardization & Customization: Strict compliance with international standards ensures interchangeability, while customized solutions such as buried depth, connection types and control logic are available based on project requirements.
