Needle valve technical requirements

Needle valve technical requirements: Under normal circumstances, the needle valve material should be based on the performance of its parameters and materials selected according to this standard, and should comply with the provisions of the relevant product standards. Can also use the performance of not less than the provisions of this standard or other materials agreed upon by both parties to the contract. Special requirements needle valve technical requirements are as follows: 1, gray cast iron needle valve: for nominal pressure pN ≤ 1.0MPa, the temperature of -10 ~ 200 ℃ water, steam, air, gas and oil and other media Gray cast iron valve. 2, malleable iron needle valve: For the nominal pressure pN ≤ 2.5MPa, temperature -30 ~ 300 ℃ of water, steam, air and oil and other media malleable iron valve. 3, ductile iron needle valve: for the nominal pressure pN ≤ 4.0MPa, the temperature of -30 ~ 350 ℃ water, steam, air and oil and other media ductile iron valve. 4, copper alloy needle valve: for the nominal pressure pN ≤ 2.5MPa water, seawater, oxygen, air, oil and other media, and the temperature is 40 ~ 250 ℃ vapor medium copper alloy valve. 5, carbon steel needle valve: for the nominal pressure pN ≤ 32.0MPa, temperature -30 ~ 450 ℃ water, steam, air, hydrogen, ammonia, nitrogen and petroleum products and other media of carbon steel valves. Valve inlet pump 6, high temperature steel needle valve: for the nominal pressure pN ≤ 16.0MPa, the temperature is less than or equal to 550 ℃ steam and petroleum products and other media high-temperature steel valves. 7, low temperature steel needle valve: for the nominal pressure pN ≤ 6.4MPa, temperature higher than or equal to -196 ℃ of ethylene, propylene, liquid natural gas and liquid nitrogen and other media of low-temperature steel valves. 8, acid-resistant stainless steel needle valve: for the nominal pressure pN ≤ 6.4MPa, the temperature is lower than or equal to 200 ℃ nitric acid, acetic acid and other media stainless steel acid-resistant steel valve. This article Keywords: valve

The ABS board/abs plastic rod, the professional name is acrylonitrile / butadiene / styrene copolymer in English name is the Acrylonitrile-butdiene-styrene.

ABS board is a new material plate industry, is currently the largest output, the most widely used polymer. It will PS board, PP board, SAN board, BS board, the performance of organic unity, both tough hard, excellent mechanical properties of rigid phase equilibrium.


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Key Features :

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  • ABS has good chemical and stress cracking resistance to inorganic salt solutions , alkalis and many acids .( Except strong oxidizing acids )
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Applications:

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ABS Rod

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