GH Series – High Pressure & Temperature Union Bonnet Valve Hy-Lok Korea

What is GH Series Needle Valve?

The GH Series is a line of Union Bonnet Needle Valves manufactured by Hy-Lok, specifically engineered for:

• Power plants
• High-pressure steam systems
• High-temperature applications
• Industrial energy systems
• Heavy-duty industrial services

The valve is designed to perform reliably under severe operating conditions commonly found in power generation industries.

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Key Features of GH Series

• Available in In-Line or Angle Pattern design
• Pressure rating up to 10,000 PSI
• High-temperature graphite packing
• Durable metal-to-metal seat design
• Back seat stem for enhanced safety
• Excellent corrosion and heat resistance
• Designed specifically for power plant applications

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Applications of GH Series Needle Valve

The GH Series valve is widely used in:

• Thermal power plants
• Industrial steam systems
• Energy generation facilities
• High-pressure boiler systems
• Steam tracing systems
• High-temperature instrumentation systems

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Technical Specifications

Maximum Operating Pressure

• 10,000 psig (690 bar) @ 100℉ (38℃)

Operating Temperature Range

• From:
  • -65℉ (-23℃)
• To:
  • 1000℉ (537℃)

Materials

• Stainless Steel
• Alloy 400 (Monel)
• A105 Carbon Steel

Sealing Options

• High-temperature graphite packing
• Metal-to-metal seat

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Structure of GH Series Needle Valve

Valve Body

• Precision-machined construction
• Suitable for high-pressure and high-temperature environments

Union Bonnet

• Enhances sealing performance and mechanical strength
• Simplifies maintenance and component replacement

Graphite Packing

• Resistant to extremely high temperatures
• Minimizes leakage in harsh conditions

Back Seat Stem

• Protects the packing
• Improves operational safety

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Working Principle

The valve operates by:

• Rotating the handle to move the stem
• The needle-shaped stem precisely regulates flow
• When fully closed, the stem seals tightly against the seat to stop flow completely

👉 Fine-thread stem design ensures smooth and accurate flow control.

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Advantages of GH Series Hy-Lok Needle Valve

• Excellent resistance to high pressure and high temperature
• Safe design for power plant applications
• Reliable metal-to-metal sealing
• Outstanding corrosion resistance
• Long service life
• Ideal for steam and energy systems

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Technical Documentation

• Product Catalog PDF
• GA Drawings / 3D STEP Drawings

👉 Contact us for technical documents:
📧 sales1@pm-e.vn

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About Hy-Lok Korea

Hy-Lok is a globally recognized manufacturer specializing in:

• Instrument Valves
• Needle Valves
• Tube Fittings
• High Pressure Valves

Its products are widely used in oil & gas, chemical, energy, and power plant industries worldwide.

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Authorized Distributor in Vietnam

THEGIOIVAN.NET
📞 +84 903 601 875
📧 sales1@pm-e.vn

We supply many industrial valve brands:
Hy-Lok, S-LOK, KSPC, KITZ, Swissfluid, VENN, TOYO, LESER, EBRO, TANKTECH, and more.

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Conclusion

The GH Series Needle Valve by Hy-Lok Korea is an ideal solution for high-pressure and high-temperature systems in power plants and energy industries. With durable Union Bonnet construction, high-temperature graphite packing, and pressure capability up to 10,000 PSI, the valve delivers reliable performance for demanding industrial applications.