Improve the screw pump displacement range of methods to purchase valve skills
This method to improve the displacement range of screw pump is a direct method, but this method also has some drawbacks, it will increase the load of the rod column, increase the force of the rod column, in addition, will make the stator, rotor and rod wear on the tubing intensified, thus can be said, this method is limited to a certain extent. At the same time, the rod string is reduced, but when the fatigue temperature rise and wear resistance of the front stator rubber, the increase of the speed will be limited to a certain extent.
Method 1: Expand the speed of Fan Wei
This method to improve the displacement range of screw pump is a direct method, but this method also has some drawbacks, it will increase the load of the rod column, increase the force of the rod column, in addition, will make the stator, rotor and rod wear on the tubing intensified, thus can be said, this method is limited to a certain extent.
Method two, improve the structural parameters (such as increasing the rotor eccentricity, stator lead, etc.)
This method to improve the displacement range of the screw pump is to increase the eccentricity of the rotor according to the calculation formula of the displacement of the screw pump, so as to achieve the purpose of improving the displacement range of the screw pump, but similarly, it also has disadvantages, increasing the eccentricity will lead to the increase of the rotor section diameter, but also increase the need for pump diameter, in addition, due to the limited space in the well, This also determines the finiteness of increasing the pump displacement amplitude by increasing the eccentricity.
Method three, increase the number of pumps
This method is a relatively effective method of high screw pump displacement range, but also there are some limitations.
Method four, use electric submersible screw pump
Although the use of electric submersion screw pump can greatly increase the speed to increase the displacement, and also reduce the rod string, but when the fatigue temperature rise and wear resistance of the front stator rubber, the increase of speed will be limited to a certain extent.
Generally speaking, the market price of the valve in our country is relatively stable, although there is a slight rise and fall every year, but the range is small. The main problems in the valve market are as follows: first, some operators buy valves without factory name and address, print the star and certificate of the first manufacturer, causing serious harm to the reputation of qualified valve enterprises. In general, the market price of the valve of our country is relatively stable, although slightly rises and falls every year, but the range is small. The main problems in the valve market are:
First, some operators buy valves without factory name and address, print the manufacturer’s star and certificate, causing serious harm to the reputation of qualified valve enterprises.
2. Refurbished valves. Some operators sell the old valves for the second time after repainting them, which brings serious safety risks to the quality of the project.
Therefore, care should be taken in choosing the right valve for your purpose. To avoid ambiguity, each valve should be specified precisely. At the time of inquiry or order, the required valves should be properly described.
Selection of valve size must determine the nominal size of the pipe to which the valve is connected. Valve Material The following factors should be considered in determining the correct valve material:
· Fluid medium to be controlled by valve
· Temperature range of fluid medium
· Pressure range to be subjected to the valve
· Climatic conditions that may affect valve operation
· Possible abnormal pressure or stress to which the valve will be subjected
· Control function of valves to be met by safety standards or piping procedures. Each valve structure is designed to perform a function. Do not expect one valve to perform all the functions of the entire piping system.
Pressure-temperature rating. To meet practical needs, pay special attention to the pressure – temperature rating of the desired valve. Special attention should be paid to sealing and gasketing materials, which largely determine the pressure-temperature rating of the valve. Specify sealing and settling materials as required to meet or better than actual requirements. Valves and connections. The integrity of the piping system, future routine maintenance, corrosion protection factors, on-site assembly, weight and safety are all factors that should be considered in determining how valves are connected to piping.
Operation Mode or Operation method Select an appropriate operation mode or operation method based on the valve type, size, pressure, temperature, and installation environment. Order of valves
When ordering valves, please provide the following data to avoid unnecessary repetition and delay to ensure that the valves purchased are truly the valves you need.
1. Valve diameter
2. Pressure interface materials: materials for castings and components.
3. Valve types: gate valve, globe valve, check valve, butterfly valve, ball valve, etc.
4. Terminal connection mode. If the connection mode is welding mode, the wall thickness of the connecting pipe should be provided; If the connection is flange, flange surface or finish shall be provided.
5. Any material that is different from the standard configuration: sealing material, settling material, bolt material, etc.
6. Any accessories: acid protection, locking device, chain operation, etc.
7. Manual or power actuators: Please include the required technical details.
8. For the convenience of ordering, please confirm the specifications and models.
Post time: Feb-03-2023
