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Application Of Hydraulic Valve Body Material

At present, the vast majority of hydraulic valve varieties are made of ductile iron as the main material.

Hydraulic valve body material

The main parts of the hydraulic valve body material, first of all should take into account the physical properties of the working medium (temperature, pressure) and chemical properties (corrosive) and so on. At the same time, you should also understand the degree of cleanliness of the media (with or without solid particles). In addition, we must also refer to the relevant provisions and requirements of the state and the use of the department.

Many kinds of materials to meet the hydraulic valve body in a variety of different conditions of use requirements. However, the correct and reasonable choice of hydraulic valve body material, you can get the most economical hydraulic valve life and the best performance.

Hydraulic valve body material, a wide range, applicable to a variety of different conditions. Now the commonly used shell material, the inner piece of material and sealing surface material described below.

Hydraulic valve body commonly used material

1. Gray cast iron gray cast iron valve for its low price, wide application and application in various fields of industry. They are usually used in the case of water, steam, oil and gas as a medium and are widely used in chemical, printing and dyeing, oiling, textile and many other industrial products with little or no effect on iron pollution.

Applicable to the working temperature between -15 ~ 200 ℃, the nominal pressure PN ≤ 1.6MPa low pressure hydraulic valve body.

2. Black heart malleable cast iron for working temperature between -15 ~ 300 ℃, nominal pressure PN ≤ 2.5MPa in the low pressure hydraulic valve body. Applicable medium for water, sea water, gas, ammonia and so on.

3. Ductile iron Ductile iron is a kind of cast iron, this cast iron, lumps or spherical graphite to replace the gray cast iron in the flake graphite. This change in the internal structure of the metal makes it more mechanical than ordinary gray cast iron, and does not damage other properties. Therefore, the use of ductile iron manufacturing valve body than those made with gray cast iron hydraulic valve body pressure is higher. Applicable to the working temperature between -30 ~ 350 ℃, the nominal pressure PN ≤ 4.0MPa in the low-pressure hydraulic valve body.

Applicable medium for water, sea water, steam, air, gas, oil and so on.

4. Carbon steel (WCA, WCB, WCC) was originally developed for the production of cast steel to meet the production needs beyond the capacity of cast iron valves and bronze valves. However, due to the overall performance of carbon steel valve, and by the thermal expansion, impact load and pipeline deformation stress generated by the strong resistance, so that its use of the scope of expansion, usually including the cast iron valve and bronze hydraulic valve body Working conditions.

Applicable to the working temperature between -29 ~ 425 ℃ in the high pressure hydraulic valve body. Which 16Mn, 30Mn for the temperature between -40 ~ 400 ℃, commonly used to replace ASTM A105. Applicable medium for saturated steam and superheated steam. High temperature and low temperature oil, liquefied gas, compressed air, water, natural gas and so on.