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Needle Valve

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With an autonomous R&D team and a professional technical staff, our company strictly adheres to quality requirements in production and R&D processes for ensuring stable product quality.

OEM Serve

We also offer OEM services and customize products according to the specific needs of our clients, fully meeting all clients‘ requirements.

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We provide our clients with fast and efficient hose, pipe fitting and valve manufacturing services and comprehensive solutions for piping systems through professional approaches.

Quality Control

Products produced under strict quality control require the inspection department to conduct quality inspection of the goods in the workshop.

 

What is Needle Valve

 

 

 

Needle valves are fine-tuning valves with needle-shaped plugs that are primarily used to regulate gas flow. Fine-tuning valves require that the opening of the valve port gradually becomes larger, and that the valve can be continuously and finely adjusted from closed to open maximum. Needle valve plug can realize this function. Needle valve plug is generally hardened steel needle, and the valve seat is made of tin, copper and other soft materials. Valve needle and the valve seat seal is dependent on its taper surface to achieve a close fit. The seal between the valve stem and the valve seat is realized by the bellows.

Advantages of Chain Sprockets

 

 

Easy to install and dismantle, tight connection. Favorable to fireproof, explosion-proof, pressure-resistant.

 

Good sealing performance and long service life. Even if the sealing surface is damaged, it is only necessary to replace the easily damaged parts to continue to use.

 

When installing the needle valve, the flow direction of the medium should be the same as the arrow direction on the valve body. Manual shut-off valves and ball valves can be installed in any position of the pipeline.

 

Needle valves are precisely adjustable valves used for a variety of purposes, such as cutting distance for flame cutting. The knob used to adjust the flame temperature is a needle valve. Instrumentation needle valve is an important part of the instrumentation measurement piping system, mainly including shut-off valves and ball valves. Its function is to open or cut off the pipeline channel.

 

The spool of a needle valve is a sharp cone that is inserted into the valve seat like a needle, hence its name. Compared with other types of valves, needle valves can withstand greater pressure and have better sealing performance, so they are usually used for sealing smaller flow, higher pressure gas or liquid media.

 

Needle valve shapes are best suited for use with pressure gauges. Generally, needle valve shapes are made for threaded connections.

 
 
 
Applications Of Needle Valve
01.

Pharmaceuticals

Needle valves are widely used in liquid formulations and drug delivery systems in pharmaceutical processes. Needle valves ensure consistency and accuracy in the pharmaceutical process as they allow for very precise flow control.

02.

Chemical field

Needle valves are widely used in chemical production to control the flow and pressure of various chemical liquids. Needle valves are an integral part of high-precision reaction and sample handling processes in particular.

03.

Food processing field

They can be used to control the flow and pressure of fluids to ensure the consistency and quality of the food production process.

04.

Biotechnology field

Needle valve is more and more widely used in biotechnology experiments. It can be used to control the flow and pressure of various biological fluids to ensure the accuracy and consistency of biological experiments.

Classification of Needle Valves

Classification by structure

 

1. Manual needle valve: manually adjustable opening and closing of the valve, generally applicable to smaller flow occasions.

2. Nut needle valve: nut adjustable opening and closing of the valve, generally applicable to the occasion of the flow of larger. 

3. Nut needle valve: nut adjustable opening and closing of the valve, generally applicable to the flow of larger occasions.

4. Electric needle valve: motor-driven conical rod rotation to control the opening and closing of the valve, suitable for occasions where the medium flow is small.

According to the use of classification

 

1. flow control needle valve: used to control the flow of media, its structure is relatively simple, a wide range of applications.
2. cut-off needle valve: mainly used for precision confidentiality occasions, with excellent cut-off performance.
3. backstop needle valve: to prevent the media backflow equipment, is a special needle valve.

Classification by material

 

1. stainless steel needle valve: excellent corrosion resistance and high temperature performance, is a common needle valve material.
2. copper needle valve: for low-temperature occasions, made of high-purity copper.
3. plastic needle valve: for corrosive media and drinking water and other occasions, made of engineering plastics.

In addition to the above three classifications, there are other special-purpose needle valve, such as pneumatic needle valve, vacuum needle valve, high pressure needle valve. Therefore, in the choice of needle valve, need to be based on the specific use of occasions and needs for comprehensive consideration. 

 
 
Needle valve structure principle
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1. Needle valve in low-temperature media piping systems and devices, it is appropriate to choose plus the bonnet of the low-temperature needle valve.
2. Oil refining unit of catalytic cracking device piping system, can choose lifting rod needle valve.
3. Needle valve in the chemical system, acid and alkali corrosive media devices and piping systems, it is appropriate to use austenitic stainless steel manufacturing, PTFE for the seat sealing ring of the stainless steel needle valve.
4. Metallurgical systems, power systems, petrochemical installations, urban heating systems in the high temperature medium of the piping system or device, metal-to-metal sealed needle valve can be selected.
5. The need for flow regulation, can choose worm gear worm gear drive, pneumatic or electric with V-shaped opening regulating needle valve.
6. Oil, natural gas pipeline, the need to clean the pipeline, and need to be buried in the ground, the choice of full bore, fully welded structure of the needle valve; buried in the ground, the choice of full bore welded or flanged connection of the ball valve.
7. Refined oil transportation pipeline and storage equipment, choose the flange connection needle valve.
8. City gas and natural gas pipeline, choose the flange connection and internal thread connection needle valve.
9. Metallurgical system in the oxygen piping system, it is appropriate to use after strict degreasing treatment, flange connection needle valve.
10. Needle valve by the valve body, needle cone, packing, handwheel composition.

 
 
Our Company
 

Xi'an Changxin Hardware Co.,Ltd. was established in 2010, who is a leading supplier and manufacturer of flexible hoses, faucets, bathroom accessories,valves,pipe fittings and sanitary valves & fittings in China. It is well known in local market and overseas because of exporting their products to more than 80 countries with high quality products and thoughtful services.The company pays attention to every detail of the product from sample drawings to finished products, and carefully incubates every innovative idea. Our products are produced under strict quality control. The inspection department is required to conduct quality inspection of the goods in the workshop. Water testing, gas testing, and pressure testing are our common tests to ensure high-quality products and ensure that customers can cooperate with us without any worries.

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