20 Valve Materials - Stem Nut Materials

Publish Time: Author: Site Editor Visit: 89

The valve stem nut directly bears the axial force of the valve stem during the opening and closing process of Lined Valve, so it must have a certain strength.

At the same time, it is threaded with the valve stem, requiring a small friction coefficient, no rust and avoidance of biting.

1

Copper alloy

Copper alloy has a small friction coefficient and does not rust, and is one of the commonly used materials at present.

For low-pressure valves with Pg<1.6Mpa, ZHMn58-2-2 cast brass can be used.

For medium-pressure valves with Pg16-6.4Mpa, ZQAL9-4 Wuxi bronze can be used.

For high-pressure valves, ZHAL66-6-3-2 cast brass can be used.

Steel

When working conditions do not allow the use of copper alloys, professional carbon steels such as 35 and 40, and stainless acid-resistant steels such as 2Cr13, 1Cr18Ni9, and Cr17Ni2 can be selected.

Working conditions do not allow the following situations.

The stem nut with melon-shaped clutch used in electric valves needs to be heat treated to obtain high hardness or surface hardness.

The working medium is corrosive to copper. When choosing a steel stem nut, pay special attention to the thread biting phenomenon.

20 Valve Materials - Stem Nut Materials

This site uses cookies

We use cookies to collect information about how you use this site. We use this information to make the website work as well as possible and improve our services.