Check valve selection points - Wuzhong instrument

The correct use of thermocouples can not only accurately obtain the temperature value and ensure that the product is qualified, but also save the data consumption of thermocouples, which can not only save money but also ensure product quality. Incorrect installations, errors such as thermal conductivity and time lag are the first errors in the use of thermocouples.

The stem axis of the globe valve is perpendicular to the seat sealing face. The relatively short open or closed stroke of the valve stem and the very reliable blocking action make this valve very suitable for the blocking or adjustment of the medium and the economical application. ...

The structure of the adjustable pressure reducing valve is composed of a main valve, a pressure feedback system, and a control pipeline. The main valve is composed of main parts such as valve body, diaphragm seat, valve cover, diaphragm, valve stem, valve plate, etc. The adjustable pressure reducing valve is installed on the one-way water supply pipeline in the city, which can reduce the upstream (inlet) pressure of the higher valve.

The control valve, also known as the control valve, is a device in the field of industrial automation process control that uses power operation to change the process parameters such as the flow, pressure, temperature, and liquid level of the pipeline medium.

1. The signal valve pushed by the control box does not move. Under the condition that the positioner is installed, the pneumatically adjustable butterfly valve is equipped with a solenoid valve. The weak current of the solenoid valve affects the information output of the control box, and the valve cannot withstand the data signal and cannot work normally. ...

Classified by role and use (1) Shut-off valve: The shut-off valve, also known as the closed-circuit valve, has the effect of turning on or cutting off the medium in the pipeline. Shut-off valves include gate valves, globe valves, plug valves, ball valves, butterfly valves and diaphragms. (2) Check valve: Check valve is also known as check valve or check valve.

(1) Selection process (1) Clarify the purpose of the valve in the equipment or equipment, and confirm the operating conditions of the valve: applicable medium, operating pressure, operating temperature, etc. (2) Confirm the nominal diameter and connection method of the pipeline connected to the valve: flange, thread, welding, etc. ...

1. Impurities are stuck on the sealing surface of the valve The valve is sometimes closed suddenly, it may be that there are impurities stuck between the sealing surface of the valve, at this time should not be forced to close, the valve should be opened slightly larger, and then try to close, try repeatedly, it can generally be eliminated, otherwise it should be checked again...

The angular displacement of the valve position detected by the valve limit switch box changes the transmission shaft through the coaxial adjacency or the reaction rod, so that the cam touches the miniature switch, so that the contact of the switch assembly is closed or disconnected, and the switching signal is transmitted to the outside through the terminal, and the passer is displayed on the spot. ...

The valve is a control component in the fluid transportation system, which has the functions of shut-off, conditioning, diversion, preventing backflow, stabilizing pressure, diverting or overflowing pressure relief. Valves for fluid control systems, from the simplest shut-off valves to the most chaotic valves used in automated control systems, range from ...

1. Accounting for traffic Accounting for flow can also be determined by referring to the capabilities of fluid transfer machinery such as pumps and compressors. Sometimes, a combination of methods is used to determine. 2. Determination of the differential pressure (1) The two equipment with close distance between the front and back of the conditioning valve and the stable pressure are ...

The self-operated control valve, also known as the self-operated control valve, is based on the pressure and temperature of the medium flowing through the valve itself as an energy source, and uses the reaction signal (pressure, pressure difference, temperature) at the output end of the valve to be transmitted to the actuator through the signal tube, and then drives the valve disc and then changes the opening of the valve to achieve the adjustment pressure.

Now the valve market is mixed, and illegal traders pretend to be innovative valves to be shoddy in order to make huge profits, which brings great safety hazards to the device project. Therefore, it is necessary to introduce to us the inspection of innovative valves. Now the valve market dealers mainly exist in the valve counterfeiting ...

In the field of industrial automation process control, the conditioning valve, also known as the control valve, is the final control element that changes the process parameters such as medium flow, pressure, temperature, and wave level by means of dynamic operation by bearing the control signal output by the conditioning control unit. It is generally composed of a drive actuator and a valve ...

Two-position five-way solenoid valve is a pneumatic component commonly used in gas-electric automatic control system, its main use is to control the double-acting cylinder to complete the automatic switching of the air circuit, widely used in the pneumatic equipment of various industrial parts, to complete the automatic control and long-distance operation in the production process, it has the ability to ...

A low-power electromagnetic microdisplacement controller consisting of a coil backbone, a coil wound around a coil skeleton with a control circuit and a terminal block, and a coil core, characterized by: The coil core is associated with two magnetic columns at both ends ...

1. What is a chemical centrifugal pump? Answer: It is a machine that adds liquid energy by increasing the effect of centrifugal force through the impeller to increase the mechanical energy of the liquid, so as to transport the liquid. 2. What are the characteristics of chemical centrifugal pumps? Answer...

The process of shell experiments and seal experiments done by turbine fixed ball valves in some artificial environments is as follows. Double blocking and discharge function of turbine fixed ball valve: the turbine ball valve is fixed by using tension spring preload float valve seat, when the valve is in two different states, full open and fully closed, the fluid is ...

Valve is a device used by Gongliang to control the direction, pressure and flow of fluid in the fluid system. A valve is a device that allows the flow or suspension of the medium (liquid, gas, powder) in the piping and equipment, and can control its flow. The valve is a controlling part in the pipeline fluid delivery system, ...

When the gate valve is closed, the sealing surface can only rely on the medium pressure to seal, that is, only rely on the medium pressure to press the sealing surface of the ram to the valve seat on the other side to ensure the sealing of the sealing surface, which is self-sealing. Most gate valves are forcibly sealed, that is, when the valve is closed, it is necessary to rely on external force to forcibly ...