Butterfly Valve manufacturing company
Knowledge Center
 Home >

Knowledge Center

> Valve basic knowledge III - Stem Material

Valve basic knowledge III - Stem Material

  • 2021-05-03 10:12

During the opening and closing of the valve, the valve stem bears the forces of tension, pressure and torsion, and is in direct contact with the medium. At the same time, there is relative frictional movement with the packing. Therefore, the valve stem material must be sufficient at the specified temperature. Strength and impact toughness, a certain degree of corrosion resistance and scratch resistance, and good manufacturability.

Commonly used valve stem materials are as follows.
 

1. Carbon steel

When used in water and steam medium with low pressure and medium temperature not exceeding 300degree, A5 ordinary carbon steel is generally used.

When used in water and steam medium with medium pressure and medium temperature not exceeding 450degree, 35 high-quality carbon steel is generally used.

2. Alloy steel

40Cr (chrome steel) is generally used when it is used for medium pressure and high pressure, and the medium temperature does not exceed 450 degree in water, steam, petroleum and other media.

38CrMoALA nitriding steel can be used when it is used in water, steam and other media with high pressure and medium temperature not exceeding 540degree.

25Cr2MoVA chromium molybdenum vanadium steel is generally used when it is used in high-pressure steam medium where the medium temperature does not exceed 570°C.

Three, stainless acid-resistant steel

It is used for non-corrosive and weakly corrosive media with medium pressure and high pressure, and the temperature of the medium does not exceed 450 degree. 1Cr13, 2Cr13, 3Cr13 chromium stainless steel can be selected.

When used in corrosive media, stainless acid-resistant steel such as Cr17Ni2, 1Cr18Ni9Ti, Cr18Ni12Mo2Ti, Cr18Ni12Mo3Ti, and PH15-7Mo precipitation hardening steel can be selected.

Fourth, heat-resistant steel

When used for high-temperature valves whose medium temperature does not exceed 600degree, Cr10Si2Mo martensitic heat-resistant steel and 4Cr14Ni14W2Mo austenitic heat-resistant steel can be selected. 

Copyright! 2021 Tianjin Jiangrui Fluid Equipement Co.,Ltd.All Rights Reserved. Powered by WILLIAM

IPv6 network supported

IPv6 network supported Google Anylitics Console

contact

Send A Message

Send A Message

    If you are interested in our valves and want to know more details,please leave a message here,we will reply you as soon as we can.

  • supplier
  • contact
  • email