Enterprise Information
Difference between different control valves
Release time:
2017/11/29 21:44
In practice, the control valve plays a very important role, and the production of many factories depends on the correct distribution and control of the flowing medium. These controls, whether energy exchange, pressure reduction or simple container charging, require some final control element regulating valve to complete. Regulating valve is generally composed of two parts: actuator and valve assembly. In some cases with valve positioner, hand wheel mechanism and other accessories. The flow characteristic of the regulating valve is the relationship between the relative flow rate of the medium flowing through the regulating valve and its opening degree under the condition that the pressure difference between the two ends of the valve remains constant. The flow characteristics of the regulating valve have linear characteristics, such as percentage
Release time:
2017/11/27 21:45
The valves used in various fields are of various types and different structures. The maintenance of each valve should be carried out according to the specific structure. 1. the maintenance of the valve body and bonnet The valve body and bonnet are the most external closed shells of the valve, which are used to withstand the pressure of the medium, the additional force during operation, the weight of other parts of the valve, and the tightening force of the flange or thread at the connection. Valve body and bonnet requirements have a certain strength and stiffness, their damage is mainly medium corrosion, erosion and mechanical damage caused by local defects, when due to corrosion or erosion caused by wall thinning, and affect their strength and stiffness, it can not be repaired, should be replaced. During maintenance, the valve
Features and working principle of automatic exhaust valve
Release time:
2017/11/22 21:45
Automatic exhaust valve plays a very important role in practical application. Features and working principle are as follows: 1. features (1) only exhaust, no drainage. The steam and water separation disc is designed with a special structure to ensure that it will not drain when exhausting. (2) Reliable performance. The internal spring of the exhaust valve spool is made of special materials and is made of high-quality stainless steel to prevent oxidation. Oxidation will affect the movement of the valve core; the exhaust mechanism of the exhaust valve is very reliable, and it has passed the exhaust experiment and the pressure sealing experiment before leaving the factory. The individual components are cast with high precision, resulting in a perfect assembly. (3) As long as the system has pressure, the exhaust valve will continue
Release time:
2017/11/20 21:46
In various types of valves, the gate valve is used more widely. Gate valve refers to the valve that closes the gate along the vertical direction of the channel axis to open or close the valve. In the pipeline, it is mainly used to connect or cut off the medium, that is, fully open or fully closed. General gate valve can not be used as a throttle, it can be used for high temperature and high pressure, can also be used for low temperature and low pressure, and can be used for a variety of different media. Gate valve is generally not used in the conveyor belt particles, viscous, easy scarring medium pipeline. The gate valve has the following advantages: ①The fluid resistance is relatively small, safe and reliable; ②The torque required for opening or closing is small; ③It can be used in
How to choose safety valve and daily maintenance
Release time:
2017/11/14 21:52
Selection of 1. safety valve safety valve selection of the general principle is determined by the operating pressure safety valve nominal pressure, safety valve by operating temperature determines the use of the temperature range, by calculating the constant pressure value of the safety valve to determine the spring or lever of the constant pressure range, and then according to the work of the material and structure of the safety valve type, according to the safety of the discharge calculated flow diameter of the safety valve. 1, structure type safety technical specifications have corresponding provisions according to its provisions, such as steam boiler safety valve should adopt full open spring safety valve, lever safety valve and control safety valve 2, nominal pressure by the operating temperature to determine the use of the safety valve temperature range (temperature higher
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