A marine stainless steel valve is a device used to control the pressure, flow and flow direction of the fluid in the ship's pipeline to meet the environmental conditions of the ship. A valve is the control device of the fluid pipeline. Its basic function is to connect or cut off the flow of the medium in the pipeline, change the flow of the medium and the flow direction of the medium, adjust the pressure and flow of the medium, and protect the normal operation of the equipment...
Marine Stainless Steel Valves Read
More »
Overview The thermal adhesion of the gate valve refers to the phenomenon that the valve is closed in a hot state, and cannot be opened after cooling. Two main reasons When the valve is closed, the valve stem extends from the external low-temperature area to the high-temperature area inside the valve body. With the gradual heating of the valve stem, a small amount of deformation will occur in both the axial and radial directions, and the axial deformation will generate a force F1, which further...
What Is the Thermal Adhesion of Gate Valves? Read
More »
In order to ensure the normal and effective operation of the power station valve, relevant staff are required to study and analyze its possible problems, and find corresponding maintenance countermeasures to ensure the reliability of the power station valve. The specific maintenance strategy is as follows： Regular maintenance and inspection Regular inspection and maintenance of power station valves is an important means to ensure the reliable and safe operation of power station valves. Therefore,...
Maintenance of Power Station Valves Read
More »
1. Introduction As we all know, valves play an important role in various systems and are of great significance in the operation and production of the system. If there is a problem in the performance or quality of valves, it will bring a lot of economic losses to the enterprise. Therefore, it is necessary to strengthen the maintenance of the valve. In the operation of the power system, the importance of the valve is self-evident. Once a problem occurs, it will bring losses to the power industry....
Problems Existing in Power Station Valves Read
More »
Quality management can be improved from the following aspects: 1. Strict control of the process In terms of processes, focus on ensuring the feasibility and accuracy of the process, formulate detailed process routes, quality plans, standardization outlines and other documents, and invite relevant personnel to carry out program demonstration and rectify the review comments. At the same time, the implementation of the process is strictly monitored, and the process is revised and improved according...
Quality Control in the Manufacturing Process of Marine Valves Read
More »
1. The improvement plan According to the failure of the butterfly check valve, the structure of the valve disc and the connection between the valve disc and the positioning rod can be improved to eliminate the stress concentration at the connection part, reduce the probability of failure of the butterfly check valve when it is used, and prolong the service life of the check valve. The disc of the butterfly check valve and the connection between the disc and the positioning rod are improved,...
Improvement in Butterfly Check Valves Read
More »
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 ship. It is currently widely used in various systems of the ship. The unique working environment of ships makes marine valves different from ordinary valves, forming an independent system. The differences between marine valves and ordinary valves are reflected in the aspects of shapes, weights and materials....
Problems in Manufacturing Marine Valves Read
More »
The common failures and damages of butterfly check valves in actual production are analyzed, and the original butterfly check valve structure is simulated, analyzed and verified by finite element simulation software; the structure is improved for weak parts. The valve disc is subjected to stress and deformation analysis, and a structural form with uniform force distribution and small deformation is designed, and a solution to failures is proposed. 1 Overview ...
Common Failures of Butterfly Check Valves Read
More »
The exhaust steam of the 300MW feed pump steam turbine is directly connected to the main engine condenser through the exhaust steam pipeline. In order to ensure the reliable isolation of the feed pump steam turbine during the operation of the main engine, an isolation valve is set in the exhaust steam pipe. Because the exhaust pipe has a large diameter and is in a vacuum state, an electric vacuum butterfly valve is selected. The sealing of the valve must be good due to the importance of the location....
The Overhaul of Vacuum Butterfly Valves in Power Plants Read
More »
With the rapid development of thermal power, petrochemical, nuclear power, aerospace and other fields, the application of high-temperature and high-pressure valves has become more and more extensive, but the following problems have also appeared. (1) Long-term operation under high temperature and high pressure and alternating working conditions will cause the valve to creep, resulting in thermal fatigue and plastic deformation, which will lead to the failure of the valve's moving parts and sealing...
Problems Occurred in High-temperature and High-pressure Valves Read
More »
The pipe diameter of the circulating water system is quite large due to the large amount of cooling water required by thermal power plants. The nominal diameter of the main pipe of the circulating water of the 300MW unit is DN2600. The nominal diameter of the inlet and outlet valves of the circulating water of the main condenser is DN1800. Butterfly valves have become the first choice for opening, closing and regulating valves in low-pressure and large-diameter pipeline systems due to their compact...
The Overhaul of Butterfly Valves in Power Plants Read
More »
Since the reform and opening up, the valve industry has developed rapidly, and has made great progress in manufacturing capacity and complete sets of technologies. As an integral part of the pipeline system, the working state of the valve affects the normal operation of the system to a great extent. When the valve is used, there are many failures. Failures of valves are that the valve cannot perform its intended function due to its inability to adapt to the working conditions and its structure being...
Failures Caused by Leakages of Valves Read
More »
English
Español (España)
العربية