Why choose us

Production Equipment

Equipped with 100 sets of full machine tools, 60 sets of semi-automatic CNC machines, 5 sets of inspection equipment.

Our Certificate

Yijia Machinery has passed IATF 16949:2016 system certification,ISO 9001 & ISO 14001 system certification,DOT, AMECA product certification.

OEM

You can find all the OEM numbers you are looking for on our product detail pages.

 

Product Application

Specialized in customized brass fittings, products meet SAE, DOT, ASTM standards, threads have NPTFNPTUNS UNEF BSPT, etc., brass material C36000, lead-free copper.

 

Part#

MALE PIPE X FEMALE PIPE

PARKER

EATON

MAF

GATES

Tectran

Fairview

Tramec Sloan

XJ56060

1/8

NV108P-2*

6820

46060

G33920-0202

3120-A

3120-A

NV108-2

XJ56061

1/4

NV108P-4

6825

46061

G33920-0404

3120-B

3120-B

NV108-4

XJ56061L

1/4 LIGHT PATTERN

 

 

46061L

 

 

 

 

 

 
 
Advantages of Needle Valves
Male X Female Needle Valves

Flexibility

The very simplest of valves only offer two options. Either the flow is open, or it is closed. Needle valves are entirely different in this regard, as they allow you to choose an entire range of midway options. You might set the flow so that it's very low, but still moving, or almost at the maximum, but not quite. This allows for extreme adaptability. Whatever situation you encounter, you're likely to be able to adjust the valve to meet it.

Female On Both Ends Needle Valve

Precision

With a needle valve, precision is always going to be the number one watchword. This is the headline feature that typically leads people to choose this valve over another. Because the needle can be shifted to such small degrees, users can regulate the flow in exact measurements. This makes the needle valve an excellent choice for settings where exact numbers and measurements are critical.

Male On Both Ends Needle Valve

Increased efficiency

Because the flow can be controlled so precisely, users can achieve an unprecedented level of efficiency. Rather than allowing far greater flow than necessary and wasting fuel or gas, users can use only the exact amount needed, saving money and energy at the same time.

Multi-Purpose Vent Needle Valve

High safety levels

As a natural side-effect of the precision and adaptability of these valves, these are some of the safest valves on the market today. Nothing flows through unless it's meant to, meaning there is far less chance of leakage, breakage, or damage which could lead to dangerous situations.

 

Applications Across Diverse Industries
 

Instrumentation

Controlling Flow To Pressure Gauges, Flow Meters, And Other Sensitive Instruments.

Laboratories

Regulating Gas And Liquid Flows In Analytical Equipment, Ensuring Accurate Experimental Results.

Chemical Processing

Metering Additives And Controlling Chemical Reactions With Precision.

Hydraulic Systems

Adjusting Hydraulic Fluid Flow For Precise Control Of Actuators And Machinery.

Gas Chromatography

Controlling Carrier Gas Flow For Accurate Sample Analysis.

Sampling Systems

Controlling The Flow Of Sampled Fluids, Maintaining Sample Integrity.

 

Needle Valve: Dimensions

Size

H

L

W

1/8 Inches

80

56

60

¼ Inches

80

56

60

3/8 Inches

80

56

60

½ Inches

81

58

60

¾ Inches

85

62

60

1 Inch

100

70

70

 

Types of Needle Valves
 

Single-Needle Valves

 

Single-needle valves feature a single needle and seat, providing a simple and cost-effective solution for flow control.

Double-Needle Valves

 

Double-needle valves feature two needles and seats, providing more precise control over the flow rate and pressure.

Pressure-Compensating Needle Valves

These valves feature a built-in pressure-compensating mechanism, which ensures that the flow rate remains constant despite changes in fluid pressure.

Flow-Tested Needle Valves

 

These valves have been flow-tested to ensure that they meet specific flow rate and pressure requirements.

 

 

Packaging & Shipping

 

productcate-819-337

 

 

Our factory

 

Yijia Hydraulic Machinery adopts full CNC machining, with a workshop area of 3600 square meters, equipped with 100 sets of full machine tools, 60 sets of semi-automatic CNC machines, and 5 sets of inspection equipment.We have an annual production capacity of 3 million sets of brass fittings and air brake hose assemblies.

productcate-1-1

 

 

FAQ

 

Q: What is the function of a needle valve?

A: A needle valve is used for precise control of fluid flow in various applications, including chemical processing, pharmaceuticals, and instrumentation, where fine adjustments and reliable sealing are essential.

Q: In which applications would you choose a needle valve over a ball valve?

A: Ball valves are ideal for on-off shutoff applications but are not suitable for throttling. Needle valves are perfect for applications requiring precise fluid control, such as maintaining low fluid flow in a carburetor.

Q: How does a needle valve work in controlling fluid flow?

A: A needle valve regulates fluid flow by using a slender, tapered needle-like stem that moves up and down inside the valve body. When the handwheel is turned, the stem gradually opens or closes the small orifice, allowing for precise control of flow rate. This fine adjustment capability makes needle valves ideal for applications requiring accurate throttling rather than quick on/off operation.

Q: What is the needle valve symbol?

A: In engineering diagrams and P&IDs (piping and instrumentation diagrams), a needle valve is typically represented by a standard valve symbol with a small arrow or tapered line, indicating its ability to finely control flow. The exact design may vary slightly depending on industry standards, but it generally includes a straight or angled body with a diagonal line representing the needle-like stem.

Q: What is the role of a needle valve in a carburetor?

A: In a carburetor, the needle valve controls the flow of fuel into the float chamber. As the fuel level changes, the float rises or falls, adjusting the position of the needle valve to maintain the correct fuel-to-air ratio. This ensures the engine operates smoothly by preventing fuel overflow or starvation, which can affect combustion efficiency.

As one of the most professional needle valves manufacturers and suppliers in China, we're featured by quality products and good service. Please rest assured to buy customized needle valves from our factory. Contact us for free sample.Comp to Male Pipe Angle Needle Valve, Compression X Male Needle Valve, Flare Fitting Needle Valve Male Pipe

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