 |
| Quantity: | |
|---|---|
J-VALVES
Construction Features
One-piece Forged Valve Body: Precision die-forged from ASTM A182 F304 stainless steel with dense grain structure and no casting defects. Its pressure-bearing capacity is significantly higher than that of cast valves, meeting the requirements of PN100 high-pressure service.
Full Bore or Reduced Bore Design: Full Bore: flow resistance close to zero with extremely low pressure drop, suitable for pigging and high-flow conditions.
Reduced Bore: compact structure and optimized cost, ideal for general shut-off applications.
Floating Ball or Trunnion Mounted Ball Structure: Floating Ball (typical for sizes ≤ 2"): medium pressure pushes the ball against the downstream seat, achieving self-tightening sealing at low pressure differential with simple and economical structure.
Trunnion Mounted Ball (optional for high pressure and large diameter): ball supported by upper and lower bearings with spring-loaded seats, suitable for high pressure differential and high torque conditions.
Precision Lapped Ball: The ball is processed by CNC machining and mirror lapping, with roundness ≤ 0.01 mm and surface roughness Ra ≤ 0.4 μm, realizing line-contact or face-contact sealing with the seat.
Elastic Seat Sealing: Seats are made of PTFE, RPTFE, PPL, PEEK or metal sealing (SS304 + Stellite), adaptable to a temperature range from -196℃ to +540℃, achieving zero leakage or bubble-tight sealing.
Anti-static Design: Conductive springs or pins are installed between the stem, ball and body to ensure continuous electrostatic conduction, preventing electrostatic accumulation in high-pressure flammable media.
Stem Blowout Proof Structure: A retaining shoulder is designed at the bottom of the stem to prevent it from being blown out by medium pressure even if packing fails or misoperation occurs, ensuring personnel safety.
Live-loaded Packing System: PTFE or flexible graphite packing preloaded by disc springs automatically compensates for slack caused by thermal cycling and pressure pulsation, guaranteeing long-term sealing reliability.
ISO 5211 Actuator Mounting Pad: The top flange complies with ISO 5211, allowing direct mounting of handles, worm gears, pneumatic, electric or hydraulic actuators for convenient automation integration.
Optional Extended Neck / Fire-safe Design: Extended heat-dissipation neck for high-temperature service; fire-safe design conforms to API 607, maintaining sealing after fire.
Technical Parameters
Nominal Diameter: DN25 (1 inch, NPS 1)
Nominal Pressure: PN100 (Class 600, approx. 10.0 MPa / 100 bar)
Face-to-Face Dimension: 165 mm (3-piece type), 140 mm (2-piece forged type), conforming to ASME B16.10 or factory standards
Temperature Range: -29℃ to +425℃
Materials
Body / Bonnet: F304 (ASTM A182), F304L, F316, F316L, F321, F347
Ball: F304, F316, forged SS304/316 with surface hardening treatment (HCr, NiCr, WC)
Stem: SS304, SS316, 17-4PH, Inconel 718
Seat: Pure PTFE, RPTFE, PPL, PEEK, SS304 + graphite, SS316 + Stellite
Packing: PTFE V-rings, flexible graphite, braided graphite, nuclear-grade graphite
Gaskets: Spiral-wound gaskets (304/316 + graphite), metal ring gaskets (octagonal)
End Connections
Butt Weld (BW): ASME B16.25 bevel, suitable for high-pressure permanent joints
Socket Weld (SW): ASME B16.11, for high-pressure small-bore instrument piping
Flanged (RF/RTJ): ASME B16.5, for easy installation and removal
Operation: Handle (standard), worm gear (effort-saving), pneumatic, electric, hydraulic, electro-hydraulic actuator
Design Standards: ASME B16.34, API 608, API 6D
Testing Standards: API 598, API 6D
Applications
Petrochemical High-pressure Systems: Control of high-pressure hydrogen and oil products in hydrocracking, hydrotreating and catalytic reforming units, meeting NACE requirements for hydrogen embrittlement resistance.
Natural Gas Long-distance Pipelines: High-pressure natural gas shut-off and bypass control in compressor stations, distribution stations and pigging stations; API 6D certification ensures pipeline safety.
Power Industry: Main steam and reheat steam systems of supercritical and ultra-supercritical units; F304/F321 materials satisfy high-temperature and high-pressure demands.
Coal Chemical Industry: Control of high-pressure syngas and oil products in coal-to-liquid, coal-to-gas and coal-to-olefin processes, resistant to erosion and corrosion.
Military and Aerospace: Reliable shut-off for high-pressure propellant, oxidizer and hydraulic systems, meeting extreme reliability requirements.
Offshore Platforms and Vessels: High-pressure hydraulic, fire-fighting and fuel oil systems; F304/F316 materials resist seawater corrosion.
LNG and Cryogenic Engineering: F304 with extended neck, suitable for cryogenic media such as LNG, LOX and LIN at -196℃.
High-pressure Instrument Systems: Root valves and isolation valves for pressure gauges, transmitters and analytical instruments, withstanding high-pressure pulses.
Advantages and Value
Excellent High-pressure Capability: Forged valve body designed for pressure up to PN250 / Class 1500. The DN25 size has sufficient safety factor under PN100 service, resistant to pressure pulsation and impact.
Optimal Flow Efficiency: Full bore design with flow resistance coefficient K ≈ 0.05 and nearly zero pressure drop, saving pumping energy consumption and allowing pig passage.
Quick Open/Close Operation: 90° rotation achieves full open/close within less than 1 second, suitable for emergency shut-off and automatic control.
High Sealing Reliability; Floating ball self-tightening seal or trunnion ball spring-loaded seats realize bidirectional zero leakage with automatic compensation for seat wear.
Wide Material Adaptability: Full series of F304/F304L/F316/F316L materials cover applications from general to severe corrosion and from low to high temperatures.
