Needle Valves

For precision pressure isolation, flow control, and instrument protection applications requiring reliable shut-off performance and long-term sealing integrity under high pressure and wide temperature ranges.

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Needle Valves

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Needle Valves

Needle Valves
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Needle Valves
Needle Valves
Needle Valves
Needle Valves
Needle Valves
Needle Valves

product introduction

HIGHLIGHT has designed a line of high quality and dependable Needle and Gauge Valves that are available in Carbon Steel or 304,316 Stainless Steel. Each valve has been tested to API 598 standards. Needle & Gauge Valves are designed to alleviate internal contamination, bonnet and stem blow-out, seat failure and leakage, as well as steam wear and shortened service life.

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Product Description

The YJGV / YJGVH Series Needle & Gauge Valves are high-pressure isolation and control valves designed for reliable instrument protection and flow regulation in industrial systems. Manufactured from carbon steel or 304/316 stainless steel, each valve features a forged body, precision stem, adjustable packing, and reinforced sealing structure. All valves are pressure tested in accordance with API 598 standards to ensure safety and sealing performance.

The valves incorporate a back-seating design in the fully open position to protect stem threads from media contamination and wear. Cold-worked stem threads provide smooth operation and mechanical strength, while PTFE or graphite packing supports a wide operating temperature range. With external packing adjustment and multiple handle options, the YJGV and YJGVH series deliver stable, durable, and dependable service in high-pressure applications.

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

 

Needle Valves

No. Component Material Grade / ASTM Specification
1 Handle Aluminum Alloy
2 Tightening Bolt Stainless Steel 304
3 Packing Gland Stainless Steel 304 / A479
4 Upper Stem Stainless Steel 316 / A479
5 Locking Nut Stainless Steel
6 Valve Disc Stainless Steel 316 / A479
7 Packing Ring Stainless Steel 316 / A479
8 Packing PTFE or Graphite
9 Pin Stainless Steel
10 Lower Stem Hardened Stainless Steel 316 /  A479
11 Valve Body Stainless Steel 316 / A479Stainless Steel 316 / A182
– Lubricant Molybdenum Disulfide

Note:
Only the components in contact with the medium are listed in this table.

 

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

 

Product Advantages

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.

 

Needle Valves

 

Needle Valves

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Needle Valves

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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 and pressure measurement systems
  • High-pressure gas and fluid control lines
  • Steam service and thermal systems
  • Chemical processing and energy facilities
  • Industrial automation and process control pipelines

 

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.

 

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