How to maintain the valve in the operation of Wuzhong instrument

Gate valves have the following advantages: Low fluid resistance: the medium channel inside the valve body is straight, and the medium does not change its direction of activity when it flows through the gate valve. The torque required for opening and closing is small; It can be used on a ring network pipeline where the medium moves in both directions, that is, the flow direction of the medium is not ...

A safety valve is an automatic valve that uses the medium's own force to expel an additional amount of fluid without any external force to avoid the pressure exceeding the additional safety value. When the pressure has recovered to normal, the valve closes again and prevents the continuous flow of the medium. (TSG ZF001-2006)

The basic structure of the centrifugal pump is composed of six parts, namely the impeller, the pump body, the pump shaft, the bearing, the sealing ring, and the stuffing box. 1. The impeller is the core part of the centrifugal pump, its speed is high and the output is large, and the blades on the impeller play a role in the ...

The self-operated conditioning valve, also known as the self-operated control valve, relies on the pressure and temperature of the medium flowing through the valve as the 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 drives the valve disc to change the opening of the valve and reach the conditioning pressure.

Product features of pneumatic conditioning stainless steel butterfly valves: 1. Simple, small size, light weight, small flow resistance, large flow coefficient and good sealing performance. Large conditioning range. It is the fulfillment unit of the instrument in the automatic control system. 2、 ...

Pneumatic cylinders and hydraulic cylinders are two common components in the mechanical field, both of which have the functions of transmitting energy and converting energy. Although the two seem to be similar, there are still great differences in the operating principle, application field, operation method, and application effect. ...

1. Remove the nut and identification plate at the upper end of the valve stem, and look at the lock nut raw material inside, the raw material is brass, otherwise it is a counterfeit product. 2. Look at the steel seal, the valve steel seal is pressed on it before the valve has passed the heat treatment, and the professional steel seal skills are used.

The mechanical deflection angle of the movable part of the surface can be measured and converted, and the size to be measured is directly indicated by the indicator, so it is also called the direct-reading appearance. According to the working principle, the indication appearance can be divided into magnetoelectric ...

1. Before the equipment, you should carefully read the operation manual of the product, check whether the product can fully meet the application needs, understand the key to the equipment, and prepare for the operation. 2. Check whether the parameters marked on the nameplate can be the parameters of the selected product and whether they can be consistent with the instructions. 3. Acceptance ...

The commonly used medium for valve pressure testing is water, oil, air, steam, nitrogen, etc., and the pressure testing methods of various valves are as follows. (1) Globe valve and throttle valve For the strength test of globe valve and throttle valve, the assembled valve is usually placed in the pressure test frame, the valve disc is opened, and the medium is injected into the ...

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...

1. The human element Because of the errors caused by human elements, including misreading, miscalculation and parallax. Misreading often occurs in measuring tools such as vernier rulers and centimeter cards. The vernier scale is likely to misread a small reading, such as 10.02 mm or 9.98 mm at 10.00 mm. Divide...

Valve is a kind of commonly used hardware products, the valve in the assembly and installation process also has a certain skill requirements, otherwise the assembled valve may not show its own excellent performance, what are the skill requirements of the valve in the assembly process? ...

Pneumatic control valve is one of the instruments widely used in petrochemical enterprises. It is of great significance to ensure the normal operation and safe production of the process equipment by operating accurately and normally. Therefore, it is necessary to strengthen the maintenance of pneumatic control valves. First, the key points to check the location during maintenance ...

1. Units and scales (scales) The scale (scale) unit of the temperature instrument is uniformly selected as Celsius (°C). 2. Detect (measure) the insertion length of the component The selection of the insertion length should be based on the detection (measurement) of the component insertion.

The shut-off valve is a kind of actuator in the automation system, which is composed of a multi-tension spring pneumatic membrane actuator or a floating piston actuator and a regulating valve, which receives the signal of the regulating instrument and controls the blocking, switching or switching of the fluid in the process pipeline. It has a simple structure, sensitive response, and ...

(1) The sealing pair is spherical, disc bias reversal planning The valve sealing pair is spherical and has a good sealing effect. Together with the disc rotation center is planned to have a bias with the center of the valve seat, so the valve disc and the valve seat constitute a sealing effect of the bias cam wedge when closed, and the valve ...

First, there is a leak in the safety valve. The industry said that when there is a small leakage in the safety valve, it is generally not easy to find, but even a small leakage point will expand in the erosion. The test method is to test ...

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 ...

The mechanical deflection angle of the movable part of the surface can be measured and converted, and the size to be measured is directly indicated by the indicator, so it is also called the direct-reading appearance. According to the working principle, the indication surface can be divided into magnetoelectric system appearance, electromagnetic system appearance, electric system appearance and ...