Brass Needle Valves
JX-0221
NPT Threaded Needle Valves Female and Male Valve
Size 1/4″
Zinc alloy handle
Brass, C37700 materials
NPT Threaded Needle Valves Female and Male
Plumberstar Needle valves are designed to regulate the flow of instruments or other industrial applications. They are robust and suitable for most industrial oil and gas market applications.
It can be used to open and close items. It is best used with a regulator if you need long and consistent control.
The flow is effective in any direction. If it leaks, you can replace the O-ring with a clamp, or a piece of Teflon tape is recommended on both ends.
Working Pressure: Rated at 600 PSI. Temperature ranges from -4 to 450 degrees.
Nominal Diameter (DN): DN6 Nominal Pressure (PN): 25
Introduction
A needle valve, a pivotal component in fluid control systems, is designed precisely to regulate fluid isolation. Its distinctive feature is a needle-shaped, small plunger with a miniature handle, enabling precise and effortless operation. When fully closed, the extended part of the valve fits snugly into the seat. This design prevents unintended openings, reducing the needle and seat distance and allowing only a small amount of substance to pass through.
With their versatility, needle valves can regulate the flow rates of liquids or gases. The pressure and flow rates decrease from the inlet to the outlet of these valves, ensuring a controlled flow. With port dimensions ranging from 1/8″ to 2″ (2 to 12 mm), needle valves, such as propane from a tank, are most commonly used to regulate gas passage, demonstrating their adaptability to various applications.
What Is the Working Principle of Brass Needle Valves?
Needle valves can be operated automatically or manually. The disc of manually actuated needle valves is opened and closed using a handwheel. When the handle is rotated clockwise, the plunger rises, and fluid pass via the valve. When the handle is rotated counterclockwise, the plunger approaches the seat. It reduces the flow rate and obstructs the fluid flow.
The valves can be opened and closed automatically by connecting automated needle valves to a hydraulic motor or an air actuator. The timer or external data collected during monitoring will assist the motor or actuator in adjusting the plunger’s position.
Needle valves, whether operated manually or automatically, offer accurate regulation of fluid flow rate. Due to the precise threading of the handwheel, adjusting the plunger position from the saddle needs several rotations. So, the needle valve can assist in regulating the system’s flow rate.
What Is the Function Of Needle Valves?
Long-threaded plungers with needle-shaped tapered points characterize needle valves. Within a tapered valve seat, this tapered extremity may be positioned. The tapered end can be precisely placed at a given distance from the tapered valve seat through the rotation of the threaded plunger.
Consequently, the valve opening can regulate the flow rate within a maximum to a minimum range. In the majority of instances, the inlet and outlet ports are coaxial. However, various valve configurations are feasible. Although operated manually, they may also be motorized to enable automation.
Know about all brass valves; read A Comprehensive Brass Valve Guide. Types, Applications, and Standards of Brass Valves
How to Choose the Right Brass Needle Valve for Your Application
Brass needle valve selection needs to consider primary attributes and application prerequisites. These factors are involved;
- Material
- Pressure
- Port and orifice size
- Temperature
1. Material composition
The particular application determines the material of the needle valve enclosure. Brass and stainless steel are the most used materials for valve housings due to their broad spectrum of chemical resistance. However, alternative materials are also available for specific applications.
- Brass
Brass needle valves are viable for gas piping, hydraulic systems, and high-temperature applications. They are optimal for use with noncorrosive media, with potable water applications being the most prevalent. But saltwater (seawater), distilled water, acids, or chlorides should not be transferred to them.
- Steel stainless steel
Stainless steel needle valves are exceptional in their chemical resistance to any medium. The substance is resilient and resistant to elevated temperatures and pressures. Seawater and other corrosive media are acceptable if the stainless steel is not exposed to saltwater.
- Plastic
Pure and corrosive fluids are adjusted using plastic needle valves. PVC is employed in applications below 60 degrees Celsius. It cannot withstand elevated temperatures or pressures.
2. Pressure
When selecting the brass needle valve, always comprehend the pressure application specifications. At 100° Fahrenheit (38°Celcius), robust needle valves can withstand pressures of 4,000 to 5,000 psi (275 to 413 bar). High-performance valves withstand up to 10,000 psi (689 bar) pressures at 100°F (38°C). These valves are accessible for high-pressure hydraulic applications because higher pressures are necessary. The vacuum needle configuration is resistant to low pressure.
3. Port and orifice size
The ports and orifices of needle valves are diverse. The end connection ports may be male or female. Thread standards employed are NPT (National Pipe Thread), BSP (British Standard Pipe), and metric (ISO standards). The most common range for needle valves is 2 to 12 mm (1/8″ to 2″). Ensured port and orifice size promoted efficient flow and system operation with less potential for erosion and leakage.
4. Temperature
Needle valves are appropriate for applications involving high or low temperatures. Specify the packing/sealing material and valve housing accordingly. However, for extreme temperatures, you must ensure they can withstand the specifications. For a temperature range of -65°F to 450°F (-54°C to 232°C), the two most prevalent sealing materials are PTFE (Teflon) and PEEK (Polyether Ether Ketone). These provide enhanced resistance to temperatures up to 600°F (315 °C).
How Is a Brass Needle Valve Manufactured?
Needle valves are manufactured through a series of processes in valve manufacturing industries. The first step involves carefully selecting suitable materials for the valve components, considering the valve’s specifications. Common materials include alloys like brass, stainless steel, and bronze. These materials undergo precision machining, creating the needle valve’s body, stem, seat, and other internal components. The precision of the machining process ensures accurate surface finishes and tight tolerances, contributing to the valve’s quality and performance.
After each component has been machined, the complete needle valve is assembled. Each element must be considered for alignment and safety. Tightness testing is performed on the assembled needle valve. It ensures that it controls fluid flow and that no breaches have occurred.
Coatings or polishes are used on the needle valve’s external surfaces. This helps improve the valve’s aesthetics and increase its resistance to corrosion. Quality-control procedures are applied throughout the valve’s production to meet industry standards. However, other quality assurance procedures, like size and pressure tests, are also conducted.
Plumberstar’s Brass Needle Valves are precision-made valves that allow you to easily control the flow of liquids and gases. These valves have a 1/8″,3/8″, and 1/4 NPT thread, making them compatible with most plumbing systems. The brass construction ensures durability and resistance to corrosion, while the needle valve design provides precise control over the flow of liquid or gas. Experience the quality and precision that Plumberstar has to offer.
Plumberstar offers a wide range of brass needle valves for plumbing, HVAC, and other industrial applications. These valves are available in NPT and BSP thread sizes and feature a variety of body materials and port configurations. They are ideal for controlling the flow of liquids and gases and can be used to regulate pressure, bypass fluids, or isolate piping sections. Plumberstar’s threaded brass needle valves are economical solutions for fluid control needs.
Plumberstar’s brass needle valves have a threaded connection. The valve is perfect for controlling the flow of liquids and gases in various applications, including plumbing, HVAC, and laboratory use. The valve can withstand high pressure and temperatures. It is easy to use and install, making it an ideal choice for any application.
FAQs
1. What is the design of the needle tip of the brass needle valve?
All regular mass-produced Plumberstar brass needle valves come with a standard tapered needle tip straight from our factory. The whole needle tip is cut into one solid piece with a fixed 60-degree tapered angle, and the needle keeps a slim overall shape. We use CNC machines to finely polish the cone surface to a mirror finish. This tapered tip locks closely into the matching cone seat inside the valve body and creates a full ring seal to block fluid. The main needle shaft uses wear-proof stainless steel, matched with low-lead brass valve bodies. This hard-sealing design works well under high working pressure. A small twist of the handwheel opens a tiny ring gap between the cone tip and valve seat. You can slow or speed up liquid and gas flow with super-precise fine-tuning. These valves fit measuring instrument pipelines, hydraulic sampling lines, and small water pressure control systems perfectly.
2. Can the brass needle valve be used in low-pressure hydraulic systems?
Plumberstar brass needle valves handle tiny flow control work. Common uses include low-pressure hydraulic lines, lubricant piping, and equipment sampling setups. We cut every valve body with precise CNC tools. The cone-shaped needle locks tightly to the valve seat.
Our standard model uses metal-on-metal hard sealing. It works best with clean hydraulic oil. We also sell a style fitted with PTFE soft sealing on the needle tip. This variant performs better if you open and close the valve often, or if pressure shifts constantly. It seals far more reliably at low pressure levels.
Our brass needle valves suit low to medium-pressure hydraulic systems. The maximum safe working pressure reaches roughly 25 bar, with exact limits varying by valve size and internal structure.
3. Have you tested the brass needle valve before shipment?
Every brass needle valve goes through two layers of quality checks before shipment. We test every single unit, and we also pull random samples from each batch. All finished valves get three core tests: sealing tightness, pressure resistance, and open-close operation. We filter out any valves that leak, get stuck, or cannot fully cut off fluid flow. The tests check all key parts: valve body strength, needle sealing surface, threaded joints, and flow adjustment function.
Valve bodies get cut by CNC machines first. These half-finished pieces take an initial water pressure test. We hold pressure at 1.5 times the standard working limit. Once workers fully assemble each valve, we run air tightness and water pressure tests a second time. Valves can only move to our warehouse if they hold pressure for over 30 seconds with zero bubbles or leaks.
We grab random samples from every production batch for cycle testing. Testers twist the valve open and closed repeatedly. Many valve sizes pass more than 5,000 open-close cycles without faults. We save full inspection files for every shipped order. These files hold pressure test numbers and sample test results.
4. Can you customize this brass needle valve according to our market?
Plumberstar provides OEM and ODM services for brass needle valves. We change connectors, internal structures, raw metal, and outer packaging to fit sales needs in Europe, America, Southeast Asia, Australia, and other areas. Our factory runs complete forging and precise CNC cutting lines. We keep all key part errors under ±0.02 mm. We make valves with BSP and NPT thread sizes for global pipe systems. You can pick two needle sealing styles. One is a 60-degree cone metal hard seal, the other uses a PTFE soft seal. Both fit different working setups, like measuring device flow control and low-pressure sealed pipelines. We add your brand marks by laser engraving on valve bodies. You can also choose shiny electroplated or matte outer surface finishes. We provide full Material Test Reports (MTRs) upon request. These papers meet the purchasing standards of different overseas markets.
5. What are the advantages of the brass needle valve?
We make Plumberstar brass needle valves out of one-piece forged low-lead brass. These brass valves cost far less than 304 or 316 stainless steel needle valves. They also handle higher pressure and last much longer than zinc alloy alternatives. Brass fights rust well. It works reliably with regular fluids like tap water, compressed air, and hydraulic oil for years. You rarely see inner channels clogged up with rust residue.
Every valve body gets precise cuts from CNC machines. Forged construction gets rid of typical casting flaws such as tiny sand holes and air bubbles inside the metal. The whole valve holds steady pressure reliably. It will not crack or leak even when switching between hot and cold fluids during daily use. Brass also takes surface plating really well. We offer multiple exterior finishes, including bright chrome, matte coating and nickel plating. You can pick any style to match the look of your different machines and devices.
