Applications and Notes of Knife Gate Valves in the Factory
- Nov 04, 2022
- Hits: 17
Abstract: This article briefly describes the structural characteristics of PZ73 knife gate valves, their application in practice, notes and common abrasion. It puts forward the direction that users...
How It Works: Double Block-and-Bleed and Double Isolation-and-Bleed
- Oct 12, 2022
- Hits: 113
The definitions of double block and bleed (DBB) and double isolation and bleed (DIB) differ between sources in the oil and gas industry. Differences in definitions and terms are important when it comes...
What are DIB and DBB Ball Valve
- Oct 12, 2022
- Hits: 726
DIB ball valve provides a seal against pressure from a single source, with a means of venting/bleeding the cavity between the sealing surfaces. DIB ball valve definition in API 6D: Single ball valve...
Fault Diagnosis of Regulating Valves
- Oct 12, 2022
- Hits: 19
In the industrial field, process parameters such as medium flow, pressure, temperature and liquid level are just like several meridians in the production process, which are very important, and regulating...
A Kind of Repair Technology for Check Valves
- Sep 28, 2022
- Hits: 19
Abstract During the use of traditional horizontal lift check valves, problems such as damage to the sealing surface and breakage of the spool guide rod will occur due to the influence of liquid corrosion...
The Internal Leakage of the Thermal Power Plant Valve
- Sep 28, 2022
- Hits: 23
In the development of thermal power plants, the internal leakage of the thermal system valves directly affects the development. Therefore, thermal power plants should actively know the causes of internal...
What are Bellow Seal Valves
- Aug 11, 2022
- Hits: 236
A bellow seal valve is a control valve that doesn't have a conventional gland packing and instead of that these valves have a bellow cartridge and this would be welded to the valve’s bonnet...
What is ePTFE and the difference between PTFE and ePTFE
- Aug 08, 2022
- Hits: 83
What is ePTFE? It's a synthetic plastic that incorporates all of the features of PTFE while also adding a new set of mechanically improved attributes. That means expanded PTFE operates across...
Seal Selection for Valve Design and Retrofitting
- Jul 28, 2022
- Hits: 30
Introduction—Seals in an Industrial Valve Valve seals are a critical component in the overall development of a new valve. In addition, upgrading seals in an existing device with the properly selected...
Proper Valve Stem Sealing Best Practices
- Jul 28, 2022
- Hits: 62
Less leakage results in reduced product loss, increased efficiency, and improved energy management. There are many methods of sealing valve stems on control and isolation valves. When chosen carefully,...
Main Influence Factors of the Sealing of Valves
- Jul 28, 2022
- Hits: 14
There are many factors affecting the sealing of valves. There are mainly the following points. 1. Auxiliary structure of the sealing Under the change of temperature or sealing force, the...
Problems in Manufacturing Marine Valves
- Jul 13, 2022
- Hits: 17
1. An introduction to marine valves A marine valve is a device used to control the fluid pressure, flow and flow direction in the ship pipeline in order to meet the environmental conditions of the...