Needle Valve

Arrotop’s needle valves are precision-engineered for effective flow control and isolation in various industrial applications. These valves are designed to offer durability, reliability, and superior performance in demanding environments.

A needle valve is employed for precise regulation of flow rates in clean gases or liquids. The gradual manipulation of the stem and plunger allows for seamless control of the flow. Typically featuring low flow rates, these valves exhibit a noticeable pressure drop from the inlet to the outlet. Needle valves come in standard port sizes ranging from 1/8” to 2” (2 to 12 mm). One of the primary uses of a needle valve is in the management of gas flow, as seen in applications like controlling the flow of propane in a tank.

Design and Construction:

• Design and Construction – 316/L Stainless Steel, 304/L Stainless Steel, Other alloys available upon request
• Stem Tip: Non-rotating for leak-tight shutoff
• Seals: PTFE or PEEK for high chemical compatibility
• Handle Options: T-bar and round handles for user preference

Performance :

• Pressure Rating: Up to 6000 psi (413 bar)
• Temperature Rating: -65°F to 450°F (-54°C to 232°C)
• Connections: Available in NPT, ISO, and tube fittings
• Flow Control: Precision-engineered for accurate flow regulation

Model Numbers

Technical Information

Applications of Needle Valves

• Laboratory Equipment: Needle valves are commonly used in laboratory settings for applications that require precise control over the flow of gases or liquids, such as in chromatography systems.
• Chemical Processing: In chemical plants, needle valves are employed to control the flow of various chemicals. Their ability to provide fine adjustments is valuable in processes that demand accurate dosing or mixing.
• Petrochemical Industry: Needle valves find applications in the petrochemical industry for controlling the flow of oil, gas, and other hydrocarbons. They are used in refining processes and pipeline systems.
• Pharmaceutical Manufacturing: Pharmaceutical industries use needle valves in processes where precise control of liquid flow is critical, such as in the manufacturing of pharmaceutical products and the handling of delicate substances.
• Hydraulic Systems: Needle valves are used in hydraulic systems to regulate the flow of hydraulic fluid. Their fine control capability is advantageous in applications where maintaining specific pressure levels is essential.
• Instrumentation Systems: Needle valves play a crucial role in instrumentation systems, including pressure measurement devices, flow meters, and other precision instruments where accurate control and isolation are required.
• Gas Sampling Systems: Needle valves are used in gas sampling systems to control the flow of gases during the collection of samples for analysis.
• Pressure Gauges: Needle valves are often integrated into pressure gauge installations to regulate the flow of fluid to the gauge, allowing for accurate pressure measurements.
• Heat Exchangers: In systems involving heat exchangers, needle valves can be employed to control the flow of heat transfer fluids, optimizing the efficiency of the heat exchange process.
• Aircraft and Aerospace: Needle valves are used in aviation and aerospace applications for fuel control, providing precise adjustments to the flow of fuel in aircraft systems.
• Steam Systems: Needle valves find applications in steam systems to regulate the flow of steam in various industrial processes.
• Water Treatment: Needle valves are used in water treatment plants to control the flow of chemicals for disinfection, pH adjustment, and other water treatment processes.
• HVAC Systems: In heating, ventilation, and air conditioning (HVAC) systems, needle valves can be utilized for controlling the flow of refrigerants and other fluids.
• Oil and Gas Industry: Needle valves are commonly employed in the oil and gas industry for controlling the flow of crude oil, natural gas, and other fluids in pipelines and production processes.
• Pressure Relief Systems: Needle valves are sometimes used in pressure relief systems to control the release of pressure in a controlled manner.

Advantages of Needle Valves

• Precise Flow Control: The primary advantage of needle valves is their ability to provide precise and fine control over the flow of fluids. The tapered plunger design allows for gradual adjustments, enabling accurate regulation of flow rates.
• Low Flow Rates: Needle valves are designed for applications with low flow rates. Their ability to handle small amounts of fluid makes them suitable for situations where precise control over a minimal flow is required.
• Fine Threaded Stem: The fine-threaded stem of needle valves facilitates smooth and precise adjustments. This feature is crucial for applications where even small changes in flow rates are significant.
• Compact Design: Needle valves typically have a compact design, making them suitable for installations where space is limited. This compactness is advantageous in various industries and systems.
• High Pressure Applications: Needle valves can handle high-pressure applications, making them suitable for situations where both precise control and elevated pressure are critical.
• Versatility: Needle valves are versatile and find applications in a variety of industries, including laboratories, chemical processing, petrochemical, pharmaceuticals, and hydraulic systems.
• Variety of Materials: Needle valves are available in different materials such as stainless steel, brass, and other alloys. This allows users to choose a valve material that is compatible with the specific properties of the fluid being controlled and the environmental conditions.
• Temperature Resistance: Depending on the materials used, needle valves can offer good temperature resistance, making them suitable for applications with varying temperature ranges.
• Bidirectional Flow: Needle valves are designed to allow bidirectional flow. This flexibility in flow direction adds to their versatility in different systems.
• Instrumentation Applications: Needle valves are commonly used in instrumentation systems where precise control and isolation are required. They are often employed in pressure measurement devices, flow meters, and other precision instruments.
• Leak-Tight Seal: Needle valves can provide a reliable and leak-tight seal when closed, ensuring that there is minimal or no leakage during operation.
• Ease of Operation: Needle valves are relatively simple to operate. The user can easily make adjustments using the handwheel or handle, and this simplicity contributes to their user-friendly nature.