Fisher Fisher-Valve Seal Face Material Considerations

1. Medium (medium state, medium density, medium viscosity)? 2. Pressure range (design pressure?) Pre-valve pressure? After-valve pressure? Large differential pressure? Critical pressure? Saturated vapor pressure? ） 3. Flow rate (*** small?) Normal? Big? ） 4. Temperature? 5. Actuator ...

FISHER Valve Positioner From mechanical to intelligent, FISHER Intelligent Valve Positioner can effectively reduce the labor intensity of maintenance personnel in the first line. Intelligent communication mode: The obvious feature of intelligent valve positioner is intelligent communication. For our process industry ...

The vibration of the control valve is generally divided into two states, one is the overall vibration of the control valve, that is, the entire control valve frequently vibrates on the pipeline or base. The other is the vibration of the spool of the regulating valve, which can be seen from the frequent movement of the valve stem up and down, and the following are the causes of these two vibrations and their treatment Measure...

Valves should be prepared to go to the world , to have a sense of innovation. With a sense of innovation, it will motivate enterprises to work hard and seize opportunities. Wenzhou Yongjia market Longwan market and other areas of the valve industry has a lot of enterprises still use the family workshop model, urgently need to establish a modern ...

Types of ball valves and their advantages Ball valve and plug valve are the same type of valves, only its closing part is a ball, and the ball rotates around the center line of the valve body to achieve opening and closing. Ball valves are mainly used in pipelines to cut off, distribute and change the flow of the medium.

The pneumatic control valve is to use compressed air as the power source, the cylinder as the actuator, and with the help of electrical valve positioners, converters, solenoid valves, position retention valves and other accessories to drive the valve, realize the switching or proportional adjustment, and receive the control signal of the industrial automation control system to complete the adjustment.

1. Pre-treatment of pickling passivation If there is surface dirt before pickling and passivating the stainless steel workpiece, it should be cleaned mechanically, and then degreased and degreased. If the pickling solution and passivation solution can not remove the grease, the presence of grease on the surface will affect the quality of pickling passivation.

Performance characteristics of electric control valves The electric control valve is composed of a combination of electric actuator and control valve, and its main features are: 1. Light weight and beautiful appearance. 2. Functionally, it can replace many products with incomplete functions, simplify the modeling, and solve the complex factory management, complex selection, ...

When the pressure gauge is connected to the pipeline, a bend should be added between the pressure gauge and the pipe connection. Why is that? What does this do? Let's take a look! This thing that connects the pressure gauge and the pipe is the pressure gauge bend (also referred to as the gauge bend), which is officially called the buffer pipe. ...

What should I pay attention to when the automatic initialization of the valve positioner is unsuccessful? DVC6200 smart valve positioners need to be initialized before they are put into use, and due to incorrect installation and use, they often run into trouble during the initialization process. place There are several aspects that need to be noted: 1 ...

Solenoid valves are selected for different media 1. Corrosive medium: it is advisable to choose plastic king solenoid valve, all stainless steel solenoid valve; For the strong corrosive medium must be selected isolation diaphragm type, such as: neutral medium, it is also advisable to choose copper alloy as the solenoid valve housing material, otherwise, there are often rust chips falling off in the valve housing.

The system hardware design of the valve positioner needs to reduce the interference between the analog ground and the digital ground, and at the same time make full use of the internal space of the positioner housing to divide the hardware system into two parts: the main control board and the interface board. Among them, the main control board of the valve positioner includes a single-chip microcomputer Z small system and a human-computer interaction model.

Fisher valve positioner commissioning steps Step 1: Connect the Rosemount 475 communicator 1. Enter the interface and select HART; Enter after selecting online; If there is an alarm signal, select YES and enter; 2. Select configure from the online drop-down menu and press the ente ...

When choosing a valve stem packing, it should be determined according to the specific conditions. The method we generally choose is: between pressure and temperature, only one *** value can be satisfied; When choosing a high-temperature valve packing, the temperature should be considered first; For corrosive media with low temperature and pressure, the ...

At present, 19 domestic enterprises have obtained the civil nuclear pressure equipment planning and production qualification license issued by the National Nuclear Safety Administration, which can plan and produce nuclear-grade valves. The types of planning and production valves include gate valves, globe valves, check valves, ball valves, butterfly valves, tension spring safety valves, and regulators.

In order to successfully automate a process, it is important to ensure that the valve itself meets the special requirements of the process and the medium in the pipeline. Usually the production process and process medium determine the type of valve, the type of spool, and the structure and material of the trim and valve. Valve selection is good ...

1. Interfacial leakage of mechanical seals: a kind of leakage between the surface of the sealing ring (oil seal, sealing ring, gasket, packing) and the surface of the contact parts. Such as leakage between the flange and the gasket, between the packing material and the shaft or the packing box. 2. Penetration and leakage of mechanical seals: medium ...

United States Fisher Pneumatic Valve Positioner is the primary accessory to the Pneumatic Control Valve, which is a single-output valve positioner. It describes the main features and common faults of the valve positioner, as well as the treatment methods and protection methods. 1. The main features of the locator (1) Large-diameter pilot ...

In recent years, with the development of mechatronics, electric valves, an important mechanical product, have ushered in the world's leading market. Compared with traditional valves (manual valves, pneumatic valves), electric valves are more resource-saving, safe and reliable in operation. In today's increasingly loud call for environmental protection and safety, electric ...

The Fisher FIELDVUEDVC6200p digital valve controller is a PROFIBUSPA communication instrument with a non-link, non-contact stroke feedback. In addition to the traditional conversion function of digital signals to pneumatic output pressure, the DVC6200p digital valve controller provides easy access to information critical ...