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How to Perform Routine Maintenance of Valves?
- Mar 31, 2022
- Hits: 34
Leakage of the Valve Body and the Bonnet Reason: 1. The casting quality of iron castings is not high, and there are defects such as sand holes, loose structure and slag inclusion on the valve body...
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Installation Principles of Pneumatic Control Valves
- Mar 31, 2022
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1. The installation position of pneumatic control valves should be at a certain height from the ground, and there should be a certain space between the upper and lower parts of the valve to...
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What Are the Differences between Forged Valves and Cast Valves?
- Mar 18, 2022
- Hits: 37
The casting material is integrally cast in a mold, and its stress distribution is uniform. There is no restriction on the compression direction. The forging is pressed by the force in the same direction,...
Self-sealing Leakage of High-pressure Valves
- Mar 18, 2022
- Hits: 71
In the production process of offshore and onshore natural gas treatment facilities, the valves used are basically high-temperature and high-pressure valves and their main functions are to control the...
Methods & Inspection of Non-destructive Inspection after Welding Repair of Valves
- Mar 09, 2022
- Hits: 16
In the forging process of valves, there will occasionally be defects such as gas holes, porosity, and impurities, which affect the normal use of the castings, and are usually repaired by welding....
Materials Used for Valves and Their Heat Treatments
- Mar 09, 2022
- Hits: 15
The commonly used materials for valve bodies are as follows: 1. Gray cast iron: it is suitable for low-pressure valves with working temperatures between -15℃ and +200℃ and nominal pressure...
Incorrect operation causes the safety valves leak
- Mar 09, 2022
- Hits: 16
Opening and closing over set pressure means that the equipment is opened or closed over its set pressure. In this case, the overload protection function of the safety valve loses, and the reasons...
Structural Analysis & Design of a New Type of Ultra-low Temperature Floating Ball Valve (Part Two)
- Dec 01, 2021
- Hits: 50
2. A new type of structural design of the ultra-low temperature floating ball valve Given that there are disadvantages for the current common floating ball valve structure, a...
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Structural Analysis & Design of a New Type of Ultra-low Temperature Floating Ball Valve (Part One)
- Dec 01, 2021
- Hits: 49
Abstract: A new type of structural design plan of the ultra-low temperature floating ball valve was proposed based on the structural analysis of the existing common ultra-low temperature floating...