How many common materials for valve bodies are there?

Valve bodies are made from various materials depending on their temperature range, pressure rating, and application environment. Below are nine commonly used materials:

1.Gray Cast Iron

Suitable for operating temperatures between -15°C to +200°C.

Used in low-pressure valves with a nominal pressure of PN ≤ 1.6 MPa.

Check Valve

2.Malleable Cast Iron

Works within a temperature range of -15°C to +250°C.

Used for medium and low-pressure valves with a nominal pressure of PN ≤ 2.5 MPa.

3.Ductile Iron

Operates at temperatures between -30°C to +350°C.

Used in medium and low-pressure valves with a nominal pressure of PN ≤ 4.0 MPa.

4.Carbon Steel (WCA, WCB, WCC)

Suitable for temperatures ranging from -29°C to +425°C.

16Mn and 30Mn can withstand temperatures between -40°C to +450°C, often replacing ASTM A105.

Commonly used for medium- and high-pressure valves.

Pressure Reducing Valve

5.Low-Temperature Carbon Steel (LCB)

Operates between -46°C to +345°C.

Specifically used for low-temperature valves.

6.Alloy Steel (WC6, WC9, WC5, WC12)

WC6 and WC9: Suitable for non-corrosive, high-temperature, high-pressure environments with a temperature range of -29°C to +595°C.

WC5 and WC12: Designed for corrosive, high-temperature, high-pressure conditions, with a temperature range of -29°C to +650°C.

7.Austenitic Stainless Steel

Handles extreme temperatures between -196°C to +600°C.

Commonly used for corrosive media applications.

8.Monel Alloy

Primarily used for valves handling hydrofluoric acid-containing media.

9.Cast Copper Alloy

Designed for oxygen pipeline valves, with an operational temperature range of -273°C to +200°C.

Additional Valve Materials

Besides the materials listed above, specialized materials are used for specific applications:

Titanium Alloy (Titanium Valves) – High corrosion resistance.

Aluminum Alloy (Aluminum Valves) – Lightweight applications.

Plastic (Plastic Valves) – Used in chemical and low-pressure environments.

Ceramic (Ceramic Valves) – Suitable for high-abrasion and chemical-resistant applications.

Since different grades within each material category correspond to specific pressure levels and applications, selecting the appropriate valve body material should be based on operating conditions and pressure requirements.

Haihao Group is a professional pipeline system expert, specializing in pipifittings of varies materials. If you need assistance in selecting the right material of pipefittings,feel free to contact us! Email:sales@haihaogroup.com