⎝⎛韦德足球⎞⎠

Control valve

Huijin Valve: a professional manufacturer of regulating valves.

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Industry ⎝⎛韦德足球⎞⎠

Huijin Valve News: Selection of cavitation condition regulating valve

2014-07-27 | 11992

The cavitation damage is characterized by a rough cinder-like shape on the washed surface, which is significantly different from the smooth polished shape caused by flash erosion. The previous section described how cavitation occurs when the pressure at the constricted section is less than PV and P2 is greater than PV. Cavitation can be handled by several methods. The first method is via ...
Huijin Valve News: Selection of flashing condition regulating valve

2014-07-27 | 11991

Flash destruction is characterized by a smooth polished profile on the washed surface. Pneumatic control valve explained again, the flicker occurs because P2 <Pv. P2 is the downstream pressure of the valve and is a function of the downstream process and the pipeline. PV is a function of fluid and operating temperature. Therefore, the variable that defines flash evaporation is not directly controlled by the valve ...
Huijin Valve News: Superior performance of WSVX control valve

2014-07-27 | 11946

The superior performance of WSVX type control valve is shown in the following aspects: Product features: stainless steel bellows and graphite packing sealed structure, the medium in the pipeline is isolated from the outside world; electric actuators are designed with integrated structure, with self-diagnostic function, use and Easy to adjust. 1, WSVX type high temperature heat transfer oil special three-way electric adjustment ...
Huijin Valve News: Development of electromagnetic flowmeter manufacturing technology and application industry expansion

2014-07-27 | 11897

This article introduces the online inspection methods of electromagnetic flowmeters commonly used at home and abroad in recent years. The online inspection specifications need to be approved by the national technical supervision department and various relevant industry associations. The accuracy assurance of electromagnetic flowmeters in the application process has always been a hot spot for users. problem. In the past, the calibration of electromagnetic flowmeters had to be sent ...
Huijin Valve News: Analysis of the characteristics of valve manufacturing process

2014-07-27 | 11924

Analysis of the characteristics of the valve manufacturing process What are the characteristics of the valve manufacturing process? Then compared with the manufacturing processes of other agencies, the valve manufacturing process has the following characteristics: First, the manufacturing process and inspection process of the valve blank are more complicated. The casting blank of the valve is a complex thin-walled shell. The castings require smooth surface, cast ...
Huijin Valve News: Brief introduction to selection and application of power station control valves

2014-07-27 | 11936

Briefly describe the selection and application of power station control valves. What is a power station control valve? What is its working principle and application? How should we choose? The selection of control valves in this process is simple and complex. The simple is that the process medium is simple, there are only two kinds of water and steam, the complicated is that the temperature and pressure of water and steam fluctuate widely, ...
Huijin Valve News: Electric actuators can be divided into rotary, straight stroke and angular stroke according to their operation mode

2014-07-27 | 11911

Valve electric actuator, as the power device of electric valve, directly affects the performance of electric valve. As one of the terminal links of the automatic control of the power station, the electric valve plays a vital role in the power station. Therefore, the selection of the valve electric actuator will directly affect the reliability, safety, economic ...
Huijin Valve News: Briefly describe the adjustment principle and application range of several commonly used control valves

2014-07-27 | 11991

In the more economically developed areas, the advantage of using computers to monitor and manage some large heating networks is that they can dynamically adjust the operating parameters of the heating network according to the actual operating conditions, so that the heating network can operate efficiently and reliably. However, due to the high investment, the scope of application is relatively limited . As far as the Lanzhou area is concerned, the actual regulation of the heating system still relies on traditional methods, namely ...
Huijin Valve News: Development Prospects of Power Station Control Valves

2014-07-27 | 11942

Current status of power station control valves Power station control valves are mainly distributed in the three major systems of boilers, turbines and auxiliary machines, followed by many auxiliary systems. For generator sets with medium-temperature and medium-pressure steam parameters, a small number of domestic conventional regulating valves are generally used, while for high-parameter, large-capacity thermal power units, generally more than 100MW ...
Huijin Valve News: A brief comparison of the old and new standards for pneumatic control valves

2014-07-27 | 11958

The new national standard GB4213-84 "General Specifications for Pneumatic Control Valves" for regulating valves was issued on March 21, 1984 and implemented on January 1, 1985. This standard was revised in 1992. The revised standard code is GB / T4213-92, which was implemented in October 1993. The standard is mainly based on IEC international standards ...
Huijin Valve News: Interpretation of Valve Installation Guide to Prevent Corrosion

2014-07-25 | 12049

The valve is a control component in the pipeline fluid conveying system. It is used to change the cross-section of the passage and the direction of medium flow. It has the functions of diversion, cut-off, adjustment, throttling, check, shunting, or pressure relief. An analysis of the environment used will determine which valve is most suitable for installation. After installing the correct valve ...
Huijin Valve News: Brush plating repair process of hydraulic control valve

2014-07-25 | 12082

First of all, dismantling and degreasing. Hydraulic valves are precision parts. They must not be damaged or lost during disassembly and inspection. Carefully analyze the working principle, determine the disassembly and assembly sequence, and mark the parts assembling. The parts must be placed in a special box and properly stored. Degreasing can be cleaned first with a cleaning agent, and then repeatedly degreased by chemical methods. Methods of repair include ...
Huijin Valve News: Briefly describe the principle and application of piston flow regulating valve

2014-07-25 | 11921

Briefly describe the principle and application of piston flow regulating valve What is a piston flow regulating valve? What are the characteristics? How does it work? What are the applications? Then the following Jingyi valve to tell us. First introduce the characteristics and working principle of piston type flow regulating valve: RKV, RKV ...
Huijin Valve News: Analysis of the connection between the valve and the pipeline

2014-07-25 | 4724

Analyze the connection between the valve and the pipeline. The connection between the valve and the pipeline will directly affect the probability of running, dripping, dripping, and leaking of the pipeline valve. Therefore, common valve connection methods include: flange connection, Wafer connection, butt welding connection, threaded connection, ferrule connection, clamp connection, self ...
Huijin valve ⎝⎛韦德足球⎞⎠: matters needing attention when purchasing hydraulic valve

2014-07-25 | 812

The model of the valve should indicate the national standard number requirements. If it is an enterprise standard, the relevant description of the model should be indicated. The working pressure of the valve is required to be ≥ the working pressure of the pipeline. Without affecting the price, the working pressure that the valve can withstand should be greater than the actual working pressure of the pipeline; on either side of the valve when it is closed, it can bear ...
Huijin Valve News: Introduction of Electric Temperature Control Valve

2014-07-25 | 838

The regulating valve is used to regulate the flow, pressure and level of the medium. According to the signal of the adjusting part, the opening degree of the valve is automatically controlled, so as to achieve the adjustment of the medium flow, pressure and liquid level. The regulating valve is divided into electric regulating valve, pneumatic regulating valve and hydraulic regulating valve. This manual mainly introduces two kinds of electric regulating valve and pneumatic regulating valve. Tune ...
Huijin Valve News: Maintenance methods during valve operation

2014-07-25 | 840

The purpose of maintenance during valve operation is to ensure that the valve is in a state of cleanliness, good lubrication, complete valve parts and normal operation. First, the cleaning of the valve, the trapezoidal thread on the valve surface, the stem and the stem nut, the sliding part of the stem nut and the bracket, as well as gears, worms and other components, are easy to accumulate a lot of dust ...
Huijin Valve News: Research on a new high-pressure differential labyrinth steam flow regulating valve

2014-07-25 | 871

When the valve opening is changed, the flow rate changes gently and stably. When the opening percentage is from 0% to 100% (the stroke is constantly changing), the flow percentage increases from 0% to 100%. On the contrary, it is lowered, and the entire stroke is nearly 100mm, which can be easily adjusted. It can be seen from the curve in Figure 5 that the percentage of valve opening and the flow rate check ratio are approximately linear, so ...
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