Description
DN150 Stainless Steel Electric Ball Valves can be tightly closed with only a 90 degree rotation and a small turning torque. The completely equal valve body cavity provides a small resistance and straight flow path for the medium. The main characteristic of ball valves is their compact structure, easy operation and maintenance. Stainless steel ball valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metals, and radioactive media. The valve body of a ball valve can be integral or modular. This type of valve should generally be installed horizontally in pipelines. Classification of stainless steel ball valves: stainless steel pneumatic ball valves, stainless steel electric ball valves, and stainless steel manual ball valves. The material of stainless steel ball valves is divided into 304 316 stainless steel ball valves.
Application Of E Lectric Ball Valve
Electric ball valves do not require manual operation, but are intelligently operated. In the production process, the environment and site determine all factors. The electric ball valves used in high-pressure, high-temperature, low-pressure, and low-temperature environments are different. The following points should be noted:
For low temperature and low pressure, the material does not require significant adjustments.
Under high pressure and high temperature conditions, electric ball valves should be made of high-temperature and high-pressure resistant materials, such as stainless steel and alloy, which can withstand high pressure and high temperature.
The internal components of the electric ball valve need to be replaced to reduce damage to the valve core, while also facilitating the flow of media and avoiding coking and blockage of the electric ball valve.
When the electric ball valve is opened, some machinery that avoids vibration can be installed to prevent damage to the internal structure of the electric ball valve core during opening.
Characteristics
1. In terms of material Electric metal sealed ball valves use metal valve seats, mostly made of stainless steel and hard alloy, with high processing accuracy and process technology requirements. They have a wide range of applications and can be used in normal temperature, low temperature, and high temperature and high pressure working conditions.
2. From the perspective of structural mechanism Electric metal sealed ball valves are resistant to high temperatures, wear and tear, and have good mechanical properties. The disadvantage is that the sealing performance of this type of seal is poor. (For media that generally contain solid particles or have wear, as well as media with temperatures above 250 degrees, it is recommended to use metal sealed ball valves.)
3. In terms of valve leakage level Metal sealed valves: generally V-class, up to VI class.
Installation And Maintenance Of Electric Ball Valves
1. When the electric ball valve is closed, there is still pressurized fluid inside the valve body;
2. Before maintenance, release the pipeline pressure and keep the valve in the open position; disconnect the power or air source; disengage the actuator from the bracket;
3. It is necessary to confirm that the pressure in the upstream and downstream pipelines of the electric ball valve has been relieved before disassembly and disassembly can be carried out;
4. When disassembling and reassembling, care must be taken to prevent damage to the sealing surfaces of parts, especially non-metallic parts. Special tools should be used when removing the O-ring;
5. During assembly, the bolts on the flange must be tightened symmetrically, gradually and evenly;
6. The cleaning agent should be compatible with the rubber parts, plastic parts, metal parts and working media (such as gas) in the ball valve. When the working medium is gas, gasoline (GB484-89) can be used to clean metal parts. Clean non-metal parts with pure water or alcohol;
7. The decomposed individual parts can be cleaned by dipping. Metal parts that still have undecomposed non-metallic parts can be scrubbed with a clean, fine silk cloth soaked in cleaning agent (to prevent fibers from falling off and adhering to the parts). During cleaning, all grease, dirt, glue, dust, etc. adhering to the wall surface must be removed;
8. Non-metal parts should be taken out of the cleaning agent immediately after cleaning and should not be soaked for a long time;
9. After cleaning, it is necessary to wait for the cleaning agent on the wall to be washed to evaporate (it can be wiped with a silk cloth not soaked in cleaning agent) before assembly, but it must not be left aside for a long time, otherwise it will rust and be contaminated by dust;
10. New parts also need to be cleaned before assembly;
11. Use grease for lubrication. Grease should be compatible with ball valve metal materials, rubber parts, plastic parts and working media. When the working medium is gas, special 221 grease can be used. Apply a thin layer of grease on the surface of the seal installation groove, apply a thin layer of grease on the rubber seal, and apply a thin layer of grease on the sealing surface and friction surface of the valve stem;
12. During assembly, metal chips, fibers, grease (except those specified for use), dust and other impurities, foreign matter, etc. should not be allowed to contaminate, adhere to, or stay on the surface of the part or enter the inner cavity.
Working Principle Of Ball Valves
The opening and closing part of a ball valve is a sphere with a circular channel, which rotates around the axis perpendicular to the channel. The sphere rotates with the valve stem to achieve the purpose of opening and closing the channel. Ball valves can be tightly closed with only a 90 degree rotation and a small turning torque. According to the working conditions, different driving devices can be assembled to form various ball valves with different control methods, such as electric ball valves, pneumatic ball valves, hydraulic ball valves, and so on When the ball valve rotates 90 degrees, both the inlet and outlet should be spherical, thus closing the valve and cutting off the flow of the medium. The opening and closing part (ball) is a valve driven by the valve stem and rotates around the axis of the ball valve. It can also be used for fluid regulation and control, among which the hard sealed V-shaped ball valve has a strong shear force between its V-shaped core and the metal valve seat welded with hard alloy, especially suitable for media containing fibers, small solid particles, etc. The multi way ball valve can not only flexibly control the convergence, diversion, and flow direction switching of the medium on the pipeline, but also close any channel and connect the other two channels. This type of valve should generally be installed horizontally in pipelines. Ball valves are divided into pneumatic ball valves, electric ball valves, and manual ball valves according to their driving methods.
