Vannes à aiguille

Technical Specifications

Working Pressure (Stainless Steel)

• YJGV Series: 414 bar (6000 psig)
• YJGVH Series: 690 bar (10000 psig)

Packing Temperature Range

• PTFE Packing: −54 °C to 232 °C
• Graphite Packing: −54 °C to 649 °C

Connection Sizes

• 1/2″ NPT
• 3/4″ NPT
• Optional bleed and test port configurations

Applicable Standards

• Pressure and sealing test in accordance with API 598

Functions and Features

• Back-seat sealing function when the valve is fully open
• Rolled and hardened valve stem for improved mechanical strength
• Adjustable packing design allowing online sealing adjustment
• Upper stem thread isolated from process media
• Non-rotating lower stem to reduce packing wear
• Multiple handle types available for different operating conditions
• Locking screw design for secure valve positioning
• 100% factory pressure and sealing test before delivery

Avantages du produit

Compared with conventional instrumentation valves, the YJGV / YJGVH needle valves provide:

• Higher pressure resistance up to 690 bar
• Wider temperature capability with graphite high-temperature packing
• Improved sealing reliability through back-seat structure and hardened stem
• Reduced leakage risk due to non-rotating stem design
• Long-term operational stability in steam, gas, and high-pressure fluid systems

These characteristics make the valve suitable for precision pressure control and measurement applications in critical industrial systems.

Vannes à aiguille

Quality & Testing Standards

All needle and gauge valves are individually pressure-tested and leakage-tested prior to shipment.
Testing procedures comply with API 598 requirements to verify sealing integrity, structural safety, and operational reliability under rated pressure conditions.

Typical Applications

• Instrumentation et systèmes de mesure de la pression
• Conduites de contrôle des gaz et des fluides à haute pression
• Service de vapeur et systèmes thermiques
• Traitement chimique et installations énergétiques
• Automatisation industrielle et contrôle des processus

Our Manufacturing Strength

We specialize in the design and manufacturing of high-pressure fluid control components for industrial instrumentation systems.
With strict material selection, standardized production processes, and full-range pressure testing, we provide dependable valve solutions suitable for demanding global industrial environments.