320 bar butt welded heavy duty stainless steel instrument globe valve

Detailed Product Introduction

The J61Y/J61W series high-temperature high-pressure stainless steel welded globe needle valve is a heavy-duty, instrumentation-grade safety component engineered for critical isolation, venting, and throttling services in punishing process networks. Precision CNC-machined from high-density forged stainless steel square block stock, this high-integrity valve series features a structurally reinforced bonnet designed to withstand intense system pressure surges up to 320 bar. The unit comes equipped with integrated extended pipe ends specifically tailored for direct butt-welding (BW) or socket-welding (SW) procedures, establishing an uncompromisingly secure mechanical joint that eliminates the leakage risks inherent in standard threaded connections under intense thermal expansion or heavy pipeline vibrations. Outfitted with high-density flexible graphite packing elements and an internal safety back-seat mechanism, it operates continuously and flawlessly at critical thermal thresholds up to 540°C, making it an indispensable isolation safeguard for power plant boilers, refinery sampling manifolds, superheated steam loops, and severe chemical processing networks.

Technical Specifications

• Valve Classification: J61Y / J61W Series Heavy-Duty High-Pressure Welded Needle Globe Valve

• Body Construction: Single-piece high-density forged square bar-stock framework

• Primary Body Metallurgy: Premium Forged Stainless Steel 316 (SS316) / Alternative SS316L / SS304

• Stem and Disc Engineering: Hardened Stainless Steel 316 conical stem tip with fine-pitch throttling profile

• Actuation Interface: Heavy-duty solid steel T-bar handle finished in protective black industrial coating

• Upper Sealing Matrix: High-purity flexible dynamic Graphite packing for reliable ultra-high temperature hold

• Connection Interface Type: Extended Weld Ends optimized for direct Butt-Weld (BW) or Socket-Weld (SW) joints

• Nominal Size Capacity: DN10 configuration standard (Scalable options from DN6 up to DN25)

• Maximum Mechanical Pressure: PN320 (32 MPa / 320 Bar / Approx. 4640 PSI hydrostatic limit)

• Maximum Thermal Rating: Certified for continuous harsh exposures up to 540°C (Ts ≤ 540°C)

• Stem Protection Guard: Integrated internal back-sealing geometry prevents operational stem blowout under maximum load

• Seat Design Technology: Heavy-duty integrated metal-to-metal body seat configuration resisting high-velocity erosion

• Bi-Directional Alignment: Straight-through unidirectional flow design featuring a clear permanently etched flow arrow

• Sealing Performance Rating: Rate A per EN 12266-1 / Exceeds ANSI Class VI ensuring zero bubble leakage

• Bonnet Safety System: Heavy-walled threaded union bonnet structure with high torque engagement security

• Internal Flow Passages: Smooth-bore internal pathways optimized to minimize cavitation effects and system pressure drop

• Applicable Media Profile: High-pressure superheated steam, thermal oil, chemical gases, hydrogen, and sour process fluid

• Shell Hydrostatic Validation: 100% factory verified through strict nitrogen/hydrostatic pressure decay protocols

• Exterior Shell Aesthetics: Matte-brushed fine sandblasted finish with deep laser-etched model, pressure, and size metrics

• Cleanliness Engineering: Clean-room degreased, particles evacuated, and fitted with thick plastic caps to protect weld ends

• Design Guidelines: Fabricated and certified in strict reference to ASME B16.34, API 598, and JB/T 7747 specifications