Needle valves within a block and bleed function help achieve positive isolation within maintenance operations of a live process plant.
These work well in non-critical processes like with non-hazardous fluids or a low-pressure system. The small port and needle-shaped threaded plunger allows for precise flow regulation in low flow applications. Not only for maintenance, but needle valves also work well in flow-metering operations and are especially good at maintaining a calibrated and constant low flow rate.
Rugged and compactly designed, Hy-Lok offers a wide range of sizes (1/8″ to 1″), and stem tips (v-stem, regulating, and soft seat) that work well for a variety of applications, including hydraulic and pneumatic systems. Of 316 stainless steel as standard, and some as alloy 400, Hy-Lok needle valves are meticulously designed for the flow, temperature and system required. Common applications include pharmaceutical, life support, and oil & gas.
End connection options include male / female NPT, Hy-Lok tube fittings, and ISO threads from 1/8″ to 1″. Available in stainless steel, carbon steel, brass, and alloy 400. With pressure rating to 10,000 psi and temperatures up to 1,200°F, Hy-Lok has a needle valve solution to meet your needs. For more information, find a Hy-Lok distributor in your area.
Needle Valve Materials
- Body - 316 cold worked stainless steel
- Packing - Glass filled Teflon
- Stem - 17 - 4 PH
NPT Needle Valve Specifications:
- MAWP up to 60,000 psig (4136 bar)
- Temperature Ratings: -100°F to 600°F (-73°C to 316°C)
- Quick Turn Needle Valve is optional
Frequently Asked Questions
What is a needle valve used for?
A needle valve is used for precise flow control in low flow applications. It allows operators to accurately regulate fluid or gas flow, making it ideal for instrumentation, calibration, and metering systems.
What makes Hy-Lok needle valves different?
Hy-Lok needle valves are designed with high-quality materials, multiple stem tip options, and precision threading to ensure accurate flow control, long service life, and reliable performance in demanding environments.
What industries use needle valves?
Needle valves are commonly used in oil and gas, pharmaceutical manufacturing, laboratory systems, hydraulic and pneumatic applications, and other industries requiring controlled flow and pressure regulation.
What materials are available for needle valves?
Hy-Lok needle valves are available in 316 stainless steel as standard, with options including carbon steel, brass, and alloy 400 to accommodate different operating environments and media types.
What is the difference between a needle valve and other valves?
Unlike ball or gate valves that are designed for on/off control, needle valves are specifically designed for fine flow regulation. Their tapered stem allows for gradual adjustment, providing much greater precision.
NPT Needle Valve Features & Benefits
- Standard valve fully opens in as little as 3 1/3 turns / Quick turn needle valve (1 3/4 turns).
- Solid stainless steel handle
- Stem is lifted off the seat more than 2x faster than conventional valves, which reduces throttling and therefore increases seat life. (Quick Turn Needle Valve)
- Less than half of the number of turns to fully open compared to competitor's valves. Less operator fatigue when opening/closing. (Quick Turn Needle Valve)
- Stainless steel captive fixing screw with stainless spring for easier handle removal. Eliminates dropped or mislplaced fixing screw.
- 4-sided tapered stem for maximum handle contact. No chance of the handle slipping or loosening on stem.
- Two-piece, heavy duty, non-rotating stem for a robust and reliable assembly.
- Bi-directional flow capability. Simplifies system designs.
- Packing gland/body thread interface consists of a preload locking internal thread form that is resistant to vibration. Eliminates the need for an external locking device.
- Double sided weep holes for easier leakage verification.
- Complete material traceability.
HAVE A QUESTION?
If you have any questions about any of our products or services, don’t hesitate to give us a call. For any inquiries, fill out the form and one of our Hy-Lok representative will contact you soon.
