NV & SV Series – Integral Bonnet Needle Valves Hy-Lok Korea

What are NV & SV Needle Valves?

The NV & SV Series are Integral Bonnet Needle Valves manufactured by Hy-Lok, designed for instrumentation and industrial flow regulation systems.

The valves are capable of:

• Precise shut-off and flow control
• Stable regulation of gases and liquids
• Reliable leak-tight sealing
• Long-term operation in industrial environments

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Key Features of NV & SV Series

• Available in In-Line or Angle Pattern design
• Integral Bonnet construction for enhanced durability and sealing
• Accurate flow regulation capability
• PTFE Chevron Stem Packing for leak prevention
• Available with Metal Seat or Bubble Tight Soft Seat
• Suitable for instrumentation and general service applications

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Applications of NV & SV Needle Valves

The valves are widely used in:

• Instrumentation systems
• Pneumatic systems
• Oil & gas industry
• Chemical plants
• Steam and industrial fluid systems
• Process control and flow measurement systems

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Technical Specifications

Design Types

• In-Line Pattern
• Angle Pattern

Materials

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

Sealing Options

• PTFE 2-piece Chevron Stem Packing
• Metal-to-Metal Seat
• PCTFE Soft Seat (Bubble Tight)

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Structure of NV & SV Needle Valve

Valve Body

• Precision-machined construction
• Excellent pressure and corrosion resistance

Needle Stem

• Tapered needle design
• Provides highly accurate flow adjustment

Integral Bonnet

• Improves mechanical strength
• Reduces leakage risk

PTFE Packing

• Ensures excellent sealing performance
• Extends service life

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Working Principle

The valve operates by:

• Rotating the handle to move the needle stem
• Creating a small opening for flow adjustment
• Fully sealing when the stem presses onto the seat

👉 Fine-thread stem design enables smooth and highly precise flow control.

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Advantages of Hy-Lok NV/SV Needle Valves

• Bubble-tight sealing performance
• Compact and easy-to-install design
• High precision flow regulation
• Multiple material options for different environments
• Excellent corrosion and pressure resistance
• Long service life

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Technical Documentation

• Product Catalog PDF
• Installation & Operation Manual
• Assembly Torque Data
• 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
• Tube Fittings
• Needle Valves
• High Pressure Valves

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

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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 NV & SV Series Needle Valves by Hy-Lok Korea are ideal solutions for instrumentation and industrial flow control systems. With durable Integral Bonnet construction, bubble-tight sealing, and precise flow regulation capability, these valves are suitable for gas, steam, and industrial liquid applications.