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Needle Valves

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Stainless steel male thread needle valve J21W

Date:[2016-10-19]    hits: Stainless steel male thread needle valve J21W

Stainless steel male thread needle valve J21W

Needle valve is a valve can be precisely adjusted, use a wider, such as flame cutting with the cut from the flame temperature adjustment knob is the needle valve. Instrument needle valve is an important part of the instrument measuring pipeline system, there are cut-off valve and ball valve, its function is to open or cut off the pipeline access. Needle valve spool is a very sharp cone, as if the same needle into the valve seat, hence the name.

 According to the different spool, can be divided into cut-off valve, gate valve, plug valve, ball valve, butterfly valve, needle valve and so on.

Needle-type valve than other types of valves can withstand greater pressure, good sealing performance, it is generally used for smaller flow, higher pressure gas or liquid medium sealing. Needle valve with the pressure gauge with The use of the most appropriate of the general needle valve are made of threaded connections. Nominal pressure: PN2.5 PN4 PN6.4 PN16 PN32Mpa Nominal diameter: DN5 ~ DN25 Applicable medium: oil, water, gas and other non-corrosive or corrosive medium Applicable temperature: -20 ℃ ~ + 440 ℃ -70 ℃ ~ -240 ℃ ≤ 540 ℃ ≤ 570 ℃ and other manufacturing materials: 20 # ﹑ 1Cr18Ni9Ti ﹑ 304,316 ﹑ 316L ﹑ 12Cr1Mov, etc.

1, low-temperature medium piping systems and devices, should be used with the valve cover low-temperature needle valve.

2, oil refining equipment, catalytic cracking unit piping system, the choice of lifting rod-type needle valve.

3, the chemical system of acid and alkali and other corrosive media devices and piping systems, should use the austenitic stainless steel, PTFE seal seat for the entire stainless steel needle valve.

4, metallurgical systems, power systems, petrochemical plants, urban heating systems in the high-temperature medium pipeline system or device, the optional metal-on-metal needle valve.

5, the need for flow control, the choice of worm and worm drive, pneumatic or electric V-shaped opening with the adjustment of the needle valve. 6, the main pipeline of oil and natural gas, the need to clean the pipeline, and buried in the ground, the choice of full-diameter, all-welded structure of the needle valve; buried in the ground, select the full-diameter welded connection or flange connection Of the ball valve.

7, the oil pipeline and storage equipment, the choice of flange-connected needle valve.

8, city gas and natural gas pipeline, the choice of flange connection and internal thread connection needle valve.

9, the metallurgical system in the oxygen pipeline system, should be selected after rigorous degreasing treatment, flange-connected needle valve.


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