Pneumatic valve lever is introduced and the commonly used materials

summary of pneumatic valve stem.
pneumatic valve stem is an important components, pneumatic valve used for transmission, joint actuator or handle, directly drive the pneumatic valve core moving or rotating below, in order to realize the pneumatic valve switch or adjustment.

pneumatic valve stem features:
pneumatic valve stem is not only in the process of pneumatic valve opening and closing of the force and movement, and is a seal. At the same time, it is under the impact of the media and corrosion, and also with packing friction. So when choosing pneumatic valve stem material, must ensure that its under the specified temperature of sufficient strength, good impact toughness, abrasion resistance, corrosion resistance. Pneumatic valve stem is wearing parts, still should be paid attention to when choose material machining and heat treatment performance.

pneumatic valve stem commonly used materials:

, copper alloy generally choose brand has a QA - ,HPb - - 。 Applicable to the nominal pressure is less than or equal to. MPa, temperature less than or equal to the degree of low pressure pneumatic valves.
and carbon steel A, steel is generally selected
, after nitriding process, applicable to the nominal pressure is less than or equal to. MPa of ammonia valve, water, steam and other medium of low and medium pressure pneumatic valve. A steel is suitable for the temperature does not exceed the degree of pneumatic valves; Steel is suitable for the temperature does not exceed the degree. ( Note: the real route that pneumatic valve rod manufactured carbon steel nitriding can't very well solve the problem of corrosion resistance, should avoid to use. ）
, alloy steel is generally selected
Cr, CrMoAA, CrMoVA etc. Cr after chrome plating processing, suitable for less than MPa nominal pressure, temperature less than or equal to the media such as water, steam, oil. CrMoAA through nitriding processing, can under the condition of the working temperature of MPa pressure, pneumatic valve commonly used in power station. CrMoVA after nitriding can handle under the condition of the working temperature of MPa pressure, pneumatic valve commonly used in power station.
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stainless steel generally choose Cr, Cr, CrNi, CrNiMoTi etc. Cr, Cr stainless steel is suitable for the nominal pressure is less than or equal to MPa, temperature less than or equal to the degree of water, steam and weak corrosive medium, can through the chrome plating, high frequency quenching methods such as strengthening surface. CrNi stainless steel pneumatic valve, pneumatic valve, low temperature ability corrosive medium. CrNiTi, CrNiMoTi stainless acid-resistant steel used in the nominal pressure is less than or equal to. MPa, temperature less than or equal to degree high temperature pneumatic valve, can also be used for temperature less than or equal to - Stainless steel of the pneumatic valve, pneumatic valve at low temperature. CrNiTi ability nitric acid and other corrosive medium; CrNiMoTi ability of acetic acid and other corrosive medium. CrNiTi, CrNiMoTi used in pneumatic valve, high temperature nitriding process can be used, in order to improve abrasion resistance.
and chrome steel bearings
choose GCr, applicable to the nominal pressure is less than or equal to the MPa and the degree of temperature less than or equal to superpressure pneumatic valves.
used in pneumatic valve rod material is more, there are CrSiMo martensite heat-resistant steel, CrNiWMo austenitic heat resistant steel, etc.
pneumatic stem nut to match the pneumatic valve rod with threads, direct pneumatic valve rod under axial force, friction and brand pneumatic valve parts, such as stents. Pneumatic stem nut, therefore, besides must have certain strength, also with small friction coefficient, no rust, no and properties, such as pneumatic valve rod killed.

China pump pneumatic valve network quality 'pneumatic valve rod manufacturers recommendation: zhiyuan technology co. , LTD. - Professional manufacturer of pneumatic valve pneumatic valve stem