 |
| Quantity: | |
|---|---|
J-VALVES
Design Features
Material of A105N Normalized Forged Steel:The valve body is integrally forged from high-quality ASTM A105N carbon steel and normalized, resulting in refined and uniform grain structure. It has a tensile strength of ≥485MPa and yield strength of ≥250MPa, with impact toughness significantly superior to ordinary A105. It meets the stringent pressure-bearing requirements of Class 1500 ultra-high pressure rating (approximately 260bar / 26.0MPa) and is suitable for non-corrosive ultra-high pressure media such as water, oil and gas.
Three-Piece Body Structure:Composed of a main body and two side bodies, connected by high-strength alloy steel bolts. The side bodies can be disassembled in-line for replacement of seats, ball, seals and trim, without removing the valve from 6-inch ultra-high pressure large-bore pipelines, greatly reducing downtime and maintenance costs.
High Pressure Stability with Trunnion Mounted Ball:The ball is supported and positioned by upper and lower trunnions. Medium pressure is borne by seat springs and piston effect, delivering stable operating torque independent of pressure differential. This avoids sharp torque increase and seizure risks of floating ball valves under 6-inch large-bore Class 1500 ultra-high pressure conditions, ensuring smooth and reliable opening and closing.
Ultra-High Pressure Flanged Connections:RF (Raised Face) or RTJ (Ring Type Joint) flanges are adopted at both ends, complying with ASME B16.5 Class 1500. For 6-inch Class 1500 flanges: outer diameter 483mm, bolt circle diameter 393.7mm, 12×M36 bolts, flange thickness 92mm, guaranteeing reliable connection and sealing at 26.0MPa ultra-high pressure.
Dual Seat Sealing:Upstream seat + downstream seat dual sealing design achieves bi-directional sealing. A dual mechanism of rear-mounted spring preload and medium pressure self-energization is applied: springs ensure initial sealing at low pressure, while medium pressure drives seats to enhance sealing at high pressure, with sealing performance improving as pressure rises.
Emergency Seal Grease Injection System:Grease injection valves are installed at the seat and stem areas. Temporary sealing can be achieved by injecting sealant in emergency conditions, buying time for pipeline emergency repair and reducing leakage risks.
Fire-Safe Design:In compliance with API 6FA / API 607 standards. In case of soft seal burnout, metal-to-metal backup sealing is formed between metal seats and the ball, preventing massive medium leakage under fire conditions.
Anti-Static Device:Built-in anti-static spring and steel ball ensure electrical continuity between the ball, stem and body, preventing fire or explosion caused by static accumulation from medium flow.
Blowout-Proof Stem Design:The stem adopts a bottom-entry integrally forged structure with anti-blowout steps and multiple sealing rings. Even if the gland accidentally loosens, the stem remains retained by the body, ensuring operational safety under ultra-high pressure conditions.
Low-Torque Bearing Design:Upper and lower trunnions are equipped with low-friction coefficient bearings and thrust washers, significantly reducing operating torque of the 6-inch large-bore ball. Economical electric / pneumatic actuators can be selected, lowering driving cost and energy consumption.
Technical Parameters
Nominal Size: 6″ (DN150)
Pressure Class: Class 1500 (PN260)
Body Material: ASTM A105N
Temperature Range: -29℃ to +425℃
Body / Side Body: ASTM A105N
Ball: A351 CF8 (304 stainless steel) / CF8M (316 stainless steel), with standard ENP electroless nickel plating or STL Stellite alloy spraying for abrasive applications
Stem: A276 410 / 420 / 304 / 316 stainless steel / 17-4PH, high strength and wear resistant
Seat: RPTFE (standard) / Nylon / PEEK / F316 with STL hardfacing (metal seated)
Packing: PTFE V-type combination / Flexible graphite (high temperature type)
Bolts: ASTM A193 B7 / B7M / B16 (ultra-high pressure high strength alloy steel)
Nuts: ASTM A194 2H / 2HM / 7
Gasket: Stainless steel spiral wound gasket (316L / flexible graphite filled) / Metal RTJ gasket (recommended for ultra-high pressure)
End Connection: Flanged (RF / RTJ) in accordance with ASME B16.5 Class 1500; BW butt-weld ends available upon request
Flange Face Dimensions: ASME B16.5
Face-to-Face Dimensions: ASME B16.10
Operation: Manual (worm gear, mandatory), Pneumatic (scotch yoke / rack & pinion, high torque), Electric (multi-turn / quarter-turn, smart type), Hydraulic, Pneumatic-hydraulic (emergency shutdown)
Design Standards: ASME B16.34, API 608, API 6D
Testing Standards: API 6D, API 598
Applications
High Pressure Oil & Gas Exploration: Used in 6-inch surface manifolds for ultra-high pressure gas wells, water injection wells and fracturing wells. Class 1500 rating satisfies 70–105MPa wellhead pressure, ensuring reliable isolation of high-pressure media.
High Pressure Sections of Natural Gas Long-Distance Pipelines: Applied as 6-inch isolation valves at main high-pressure pipelines and inlet/outlet valves of compressor stations. Class 1500 matches pressure requirements of X80/X100 high-grade pipelines, ensuring safe high-flow high-pressure transportation.
Ultra-High Pressure Chemical Reaction Systems: Used for 6-inch inlet and outlet valves of high-pressure hydrogenation reactors, ammonia synthesis converters and urea synthesis reactors, withstanding 25–32MPa high-pressure hydrogen, ammonia, ammonium carbamate solution and other media.
Offshore Engineering High Pressure Pipelines: Installed in 6-inch high-pressure risers and manifolds on FPSOs and deepwater semi-submersible platforms. A105N forged steel delivers high strength, with optional stainless steel trim for seawater corrosion resistance.
High Pressure Testing & Experimental Equipment: Applied in 6-inch high-pressure connecting pipelines of hydrostatic test benches, pneumatic test benches and pulse test benches, with Class 1500 rating meeting ultra-high pressure testing requirements.
General Industrial Service: Suitable for high-flow control and isolation of 6-inch ultra-high pressure water, oil, gas and similar media, especially for applications requiring in-line maintenance, frequent operation and ultra-high pressure large-bore conditions.
Advantages & Value
Ultra-High Pressure & Large-Bore Adaptability: Class 1500 (260bar) rating satisfies extreme high-pressure conditions, while 6-inch size enables high-flow delivery, serving as core equipment for ultra-high pressure high-flow systems.
Superior Toughness from Normalization: A105N normalized treatment refines grains and provides significantly higher impact toughness than ordinary A105, preventing brittle fracture under ultra-high pressure and protecting personnel and equipment safety.
High Pressure Stability with Trunnion Design: Operating torque is independent of medium pressure, avoiding torque surge in 6-inch large-bore Class 1500 service. Worm gear, electric and pneumatic actuators can be selected economically, with smooth opening and closing without seizure.
Multiple Safety Guarantees: Self-relief, emergency grease injection, fire-safe, anti-static and blowout-proof functions meet SIL safety integrity level requirements, safeguarding public safety of ultra-high pressure pipelines.
High Standardization & Interchangeability: Strictly conforms to ASME B16.34, B16.5, B16.10 and API 6D standards, fully interchangeable with global mainstream brands of 6″ Class 1500 valves and pipeline accessories, reducing inventory and replacement costs.
Strong Automation Integration Capability: Optional high-torque worm gear, pneumatic scotch yoke and smart electric actuators support SCADA/DCS remote control, enabling easy integration into ultra-high pressure pipeline automation systems for unattended stations.
