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J-VALVES
Design Features
A105N Normalized Forged Carbon Steel: The valve body is integrally forged from high‑quality ASTM A105N carbon steel and normalized to achieve fine and uniform grain structure. It offers tensile strength ≥485MPa and yield strength ≥250MPa, with impact toughness significantly superior to conventional A105. It meets the stringent pressure‑retaining requirements of Class 800 (approximately 136bar / 13.6MPa) and is suitable for non‑corrosive high‑pressure media including 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 ultra‑high‑pressure pipelines, greatly reducing downtime and maintenance costs.
Floating Ball High‑Pressure Self‑Relieving Sealing: The floating ball has no fixed support shaft and floats slightly along the flow direction under medium pressure, forming a tight seal with the downstream seat. Under Class 800 ultra‑high pressure, medium pressure pushes the ball against the seat, increasing sealing specific pressure as pressure rises to achieve pressure‑energized sealing, with improved sealing performance at higher pressures.
Flanged Connection (RF / RTJ): Complies with ASME B16.5 Class 800 (designed to Class 900). For 1‑inch size, flange outer diameter is 121mm, bolt circle diameter 92.1mm, with 4×M20 bolts ensuring reliable connection under ultra‑high pressure.
NPT / BSPT Threaded Connection: 1‑inch high‑pressure tapered pipe threads conforming to ASME B1.20.1, providing metal‑to‑metal sealing through thread engagement, suitable for high‑pressure instrument tubing.
Socket Weld (SW) Connection: Complies with ASME B16.11, featuring high welding strength ideal for vibrating or pulsating service.
Butt Weld (BW) Connection: Complies with ASME B16.25, with full‑penetration welding suitable for the highest pressure ratings.
Full Bore Design: 1‑inch full bore ball bore matches pipeline inner diameter for extremely low flow resistance, with a Cv value of approximately 30. It satisfies flow accuracy requirements in high‑pressure instrument systems with no dead spaces or sediment accumulation.
Fire‑Safe Design: Complies with API 607. In the event of PTFE / RPTFE seat burnout, metal‑to‑metal backup sealing forms between the metal body and ball to prevent medium leakage under fire conditions.
Anti‑Static Device: Equipped with a built‑in miniature anti‑static spring and steel ball to ensure electrical continuity between the ball, stem and body, preventing fire or explosion caused by static buildup from high‑pressure high‑velocity flow.
Blowout‑Proof Stem: The stem is integrally forged in a bottom‑entry design 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.
Technical Specifications
Nominal Size: 1″ (DN25)
Pressure Class: Class 800 (13.6MPa)
Body Material: ASTM A105N
Temperature Range: -29℃ to +425℃
Body / Side Bodies: ASTM A105N
Ball: A351 CF8 (304 SS) / CF8M (316 SS), standard ENP electroless nickel plating or Stellite (STL) alloy coating for abrasive service
Stem: A276 410 / 420 / 304 / 316 stainless steel, high strength and wear resistance
Seat: RPTFE (standard) / PEEK / Nylon / metal seal (optional)
Packing: PTFE V‑rings / flexible graphite
Gaskets: PTFE / flexible graphite / metal gaskets
Bolts: ASTM A193 B7 / B7M / B16 (ultra‑high‑pressure high‑strength alloy steel)
Nuts: ASTM A194 2H / 2HM / 7
Handle: A105N galvanized / aluminum alloy (anodized) / nylon coated
End Connections: Flanged (RF / RTJ, designed to ASME B16.5 Class 900), NPT / BSPT threaded, Socket Weld (SW), Butt Weld (BW)
Flange Face Dimensions: ASME B16.5
Thread End Dimensions: NPT 1″, 11.5 TPI, thread length approx. 24mm, reference major diameter 33.228mm
Operation: Manual (mini lever / needle handwheel / worm gear), pneumatic (mini rack‑and‑pinion), electric (mini quarter‑turn), hydraulic (miniature)
Design Standards: ASME B16.34, API 608
Testing Standard: API 598
Applications
High‑Pressure Sampling Systems: Used in 1‑inch ultra‑high‑pressure sampling lines for reactors, separators and storage tanks. Full bore design eliminates dead spaces, avoiding sample residue and cross‑contamination to ensure representative sampling.
High‑Pressure Test Equipment: Applied in 1‑inch ultra‑high‑pressure connecting lines for hydraulic test benches, pneumatic test benches and pulse test benches. Class 800 rating satisfies ultra‑high‑pressure testing with reliable sealing under frequent cycling.
Water Jet Cleaning: Installed in 1‑inch ultra‑high‑pressure pump discharge lines for water jet and steam jet cleaning equipment. Class 800 rating withstands high pump discharge pressure, with three‑piece structure facilitating maintenance.
General Industrial Service: Suitable for precise control and isolation of 1‑inch ultra‑high‑pressure water, oil, gas and similar media, especially for applications requiring in‑line maintenance, frequent operation and ultra‑high‑pressure instrument service.
Advantages & Value
Excellent Toughness from Normalization: A105N normalized treatment refines grains and delivers significantly higher impact toughness than standard A105, preventing brittle fracture under ultra‑high pressure and safeguarding personnel and equipment.
Reliable Pressure‑Energized Sealing: Floating ball design increases sealing specific pressure with rising medium pressure, enhancing sealing performance at Class 800 ultra‑high pressure to achieve zero leakage and avoid low‑pressure leakage common to floating ball valves.
Flexible End Connections: Multiple options including flanged, threaded, socket weld and butt weld adapt to various ultra‑high‑pressure pipeline standards without conversion fittings, reducing project costs.
Extremely Compact & Lightweight: Three‑piece design weighs approximately 1.5–3kg with overall length around 100–140mm, enabling flexible installation in crowded high‑pressure tube racks and confined instrument panels with over 70% space savings.
Ultra‑Light Operation: 1‑inch small size features operating torque below 5N·m, allowing fingertip operation without tools for fast isolation and switching of ultra‑high‑pressure lines.
Full Bore, Low Resistance: Bore matches pipeline inner diameter with near‑zero flow resistance and negligible pressure drop, ensuring measuring accuracy and response speed of ultra‑high‑pressure instrument systems.
Safety & Compliance Compliance: Fire‑safe, anti‑static and blowout‑proof designs meet API 607 and instrument safety codes, with third‑party testing to protect personnel and equipment in ultra‑high‑pressure instrument systems.
High Standardization & Interchangeability: Strictly manufactured to ASME B16.34, B16.5 and API 608, fully interchangeable with 1″ Class 900 valves and pipeline accessories from major global brands, reducing inventory and replacement costs.
