Valve Body Lost Wax Castings

Product Introduction

The valve bodies of medium and low-pressure specifications are usually produced by the casting process.

The valve body of medium and high-pressure specifications is produced by the forging process.

Valve Body Lost Wax can effectively withstand medium pressure after forming a seal with the valve plug and valve seat seal.

The definition of "valve" is a device used to control the direction, pressure, and flow of fluid in a fluid system. A valve is a device that makes the medium (liquid, gas, powder) in the piping and equipment flow or stops, and can control its flow.

The material of the valve body is selected according to different process media.

Commonly used materials are cast iron, cast steel, stainless steel, carbon steel, plastic, copper, etc.

Material Description

1. Grey cast iron

Gray cast iron valves are used in various fields of the industry due to their low price and wide application range. They are usually used in the case of water, steam, oil, and gas as the medium, and are widely used in the chemical industry, printing and dyeing, oil chemical, textile, and many other industrial products that have little or no influence on iron pollution. It is suitable for low-pressure valves with a working temperature between -15～200℃ and nominal pressure PN≤1.6MPa.

2. Ductile Iron

Ductile iron is a type of cast iron in which lump or nodular graphite replaces flake graphite in gray cast iron. The change in the internal structure of this metal makes its mechanical properties better than ordinary gray cast iron, without compromising other properties. Therefore, valves made of ductile iron are used at higher pressures than those made of gray iron. It is suitable for medium and low-pressure valves with working temperatures between -30～350℃ and nominal pressure PN≤4.0MPa. Applicable media are water, seawater, steam, air, gas, oil, etc.

3. Carbon steel

Cast steel was originally developed to accommodate production needs that exceeded the capabilities of cast iron and bronze valves. However, due to the good overall performance of carbon steel valves and the high resistance to stress caused by thermal expansion, impact loads, and pipeline deformation, their scope of use is expanded, usually including the working conditions of cast iron valves and bronze valves. It is suitable for medium and high-pressure valves with working temperatures between -29 and 425°C. Among them, 16Mn and 30Mn are used at temperatures between -40 and 400°C and are often used to replace ASTM A105. The applicable medium is saturated steam and superheated steam. High and low-temperature oil, liquefied gas, compressed air, water, natural gas, etc.

Detection Systems

Copper Silica Sol Investment Casting