Technical requirements for valve assembly - Wuzhong instrument

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 ...

1. Elastic ball valve (i.e. orbital ball valve) The elastic ball valve is the orbital ball valve, and its ball is elastic. The ball and the seat seal ring are made of metal materials, and the specific pressure of the seal is very large, and the pressure of the medium itself can not meet the requirements of the seal, so it is necessary to apply external force. This...

Stainless steel globe valve is a kind of globe valve, the specific stainless steel raw materials are CF8, CF3, CF8M, CF3M, different raw materials are selected, can be separated from water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea and other media. Stainless steel globe valves are divided into manual stainless steel shut-offs.

　　A solution to poor sealing function 1) Use unbalanced force to add seal specific pressure method The sealing pressure of the actuator on the valve core is certain, and when the unbalanced force has a tendency to open the valve core, the sealing force of the valve core is two forces.

On December 2, 2019, the China-Russia East Route Natural Gas Pipeline Project was officially put into operation. The large-diameter pressure regulator jointly developed and manufactured by Wu Zhong and China Petroleum Pipeline Branch was put into use at Changling Natural Gas Transmission Station in Jilin Province and successfully ventilated. ...

1. Confirm the selection criteria (1) Process fluid conditions: fluid name, flow rate, inlet and outlet pressure, pressure difference during normal operation, pressure difference when valve is closed, fluid temperature, specific gravity, viscosity, whether there are suspended solids, fibrous, muddy, etc. Sometimes it is possible to part with the most ...

(1) The direction of the thermal relay device shall be the same as the specified direction, and the general inclination shall not exceed 5°. If it is installed with other electrical appliances, it should be installed under other electrical appliances as much as possible to avoid the influence of heat generation from other electrical appliances. (2) When wiring the device, check whether the wiring is correct, ...

From the perspective of product application, hard seal ball valve defects can be roughly divided into the following two categories: non-technical faults and skill defects. The following text mainly introduces the analysis and solution of non-technical problems of hard seal ball valves; ...

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

It is composed of a pneumatic O-type shut-off ball valve and a pneumatic double-acting actuator. It has the advantages of simple structure, small size, light weight, convenient operation, etc., and can be widely used in automatic conditioning and long-distance control of industrial production processes such as petroleum, chemical industry, hydropower, and textile. ...

The hydraulic maintenance module uses the hydraulic locking method to control the inlet and outlet oil circuits and load oil circuits of the electro-hydraulic servo valve, and the module has the following three functions: 1. Locking function When the system is in normal condition, the hydraulic lock is in the guide ...

The flow rate and velocity of the valve mainly depend on the diameter of the valve, and are also related to the resistance of the structure of the valve to the medium, and at the same time have an intrinsic relationship with the pressure, temperature and concentration of the medium of the valve. Two...

Digital Factory Outline The use of CAD and PDM systems, ERP and other related information systems have been appropriately popularized in many production factories at present, and Wu Zhong has completed the "digital factory" skills and systems after the key link of "how to make → process planning".

Insist on the cleanliness of valves and actuators as much as possible. The valve is drained after the flow test. During storage and installation, it is important to avoid the ingress of contaminants. Assuming that there is a problem, check it according to the instructions. Do not use a crowbar or an excessively large ...

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. ...

1. System overview The valve automatic control system controls the solenoid valve equipment placed in the field by announcing the instructions of the control service center in a wireless way, and then realizes the opening and closing of the solenoid valve, and the opening and closing status of the valve, the operation status, whether the equipment is online, historical data inquiry, etc.

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.

1. The valve position of the electric actuator is lost: 1) Battery power is lost When the incremental encoder is selected to measure the stroke, it is necessary for the fulfillment mechanism to have a battery as an auxiliary power supply, the AC power supply disappears, and the change of the valve position of the electric actuator can still be detected by the incremental encoder.

1. According to the processing requirements, some parts need to be polished, and there can be no processing burrs on the appearance; 2. All parts are degreased; 3. After the degreasing is completed, pickling and passivation will be carried out, and the cleaning agent does not contain phosphorus; 4. Rinse with pure water after pickling and passivation.

There are a total of eight functions of the conditioning valve, and the eight functions of the full-function ultra-light conditioning valve are excellent, so it is called "full-function valve". 1. The conditioning function is one of the main functions of the conditioning valve, which is manifested as (1) flow characteristics; (2) Adjustable ratio R; ...