How to use valves correctly in mineral processing plant?
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How to use valves correctly in mineral processing plant?

2018-04-27 | Browse the number (2154)

It is known that valves are very important in the mineral processing industry, which helps operators control the whole pipes and slurry flow, so they make mineral processing plant management easier and more convenient. There are many kinds of valves in mineral processing industry according to different functions. Here are some problem solutions about the knife gate valve and pinch valve.

Knife Gate Valve

1. How to solve the leakage of connection between valve body and bonnet?

The reason why leakage is flange sloping is that bolts of flange connection place are tightened unevenly; tension of fastening bolts is not enough; Gasket is damaged and cannot meet the requirements. So, we should fasten the flange with uniform force, or replace the gasket.

Warm tips:

﹒Temperature range should be controlled among -40℃~-70℃;

﹒There are three kinds of the manual knife – type gate valve classified by different pressure bearing are named XWXZF-0.6, XWXZF-1.0 and XWXZF-1.6


Pinch Valve

1. What are the disadvantages of pinch valve?

This valve is mainly used in low-pressure environment, generally less than PN 16.

Rubber casing is the core of pinch valve, and it has a strict limitation in temperature, usually between -40℃~200℃.

Limited by rubber process, the caliber of pipe valve usually is within DN 300 mm in order to meet the quality of casing strength. Large caliber pinch valves bring higher prices.

Warm tips:

﹒Not recommended for negative pressure

﹒Not recommended for severe throttling duties

﹒The bushings are designed for pressure up to 10.5KG/cm2. If the required pressure is higher than the limitation pressure, please contact us.

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