400 bar male threaded welded connection heavy duty needle valve

Detailed Product Introduction

The J23W series high-temperature high-pressure stainless steel needle valve is an elite-tier instrumentation-grade control valve engineered for critical isolation and throttling in severe industrial process loops. Precision CNC-machined from a single block of high-density forged SS316, this rugged globe valve series features a reinforced bonnet structure designed to sustain severe pressure surges up to 400 Bar. It comes uniquely equipped with pre-configured male threaded connection adapters transitioning to extended pipe ends optimized for direct butt-welding or socket-welding, fundamentally mitigating leakage liabilities under aggressive dynamic expansion or heavy structural vibrations. Outfitted with high-temperature graphite packing matrices and an internal safety back-seat mechanism, it operates reliably at extreme temperatures climbing up to 540°C. This makes it an ideal isolation safeguard for thermal power plant superheaters, high-pressure steam distribution skids, oil refineries, and analytical chemical sampling arrays.

Technical Specifications

• Valve Series Classification: J23W Series Heavy-Duty High-Pressure Instrumentation Needle Valve

• Body Manufacturing Profile: Single-piece heavy forged square bar-stock block framework

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

• Stem and Tip Engineering: Hardened Stainless Steel 316 stem with a fine-pitch throttling profile

• Actuation Mechanism: Heavy-duty solid stainless steel T-bar handle secured with a top set bolt

• Upper Sealing Matrix: Advanced high-density flexible Graphite packing for superior high-temperature hold

• Connection Interface Type: Male Threaded Ends integrated with extended Butt-Weld (BW) pipe adapters

• Nominal Size Capacity: DN10 standard configuration (Options extending from DN6, DN15 up to DN25)

• Maximum Mechanical Pressure: PN400 (40 MPa / 400 Bar / Approx. 5800 PSI hydrostatic tier)

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

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

• Seat Design Technology: Heavy-duty integrated metal-to-metal conical body seat preventing erosion

• Bi-Directional Alignment: Straight-through unidirectional flow configuration with a clear laser-etched direction arrow

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

• Bonnet Locking System: Robust safety locking pin layout stops accidental bonnet backup during heavy vibrations

• Internal Fluid Velocity: Optimized smooth internal fluid channels minimize cavitation effects and pressure drop

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

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

• Exterior Shell Aesthetics: Matte-brushed fine sandblasted finish with deep laser-etched technical parameters

• Cleanliness Engineering: Clean-room degreased, particles evacuated, and fitted with protective vinyl caps for shipment