Control valve & on off valve ,solenoid-valve manufacturer

Close this search box.

Professional On-Off Valves Manufacturer

BCST on off  valve include on off ball valve , on off butterfly valve , on off gate valve  and globe valve . They can be equipped with pneumatic or electric actuator . 

  • Low-pressure drop.
  • Bubble tight shut-off.
  • Fast Response time
  • Highshut off pressure.

Get in Touch with Us

    A Reliable On-off Valve Supplier In China

    BCST on-off valves are used for shut-off for corrosive fluids, slurries, normal liquid, and gases. It is also suitable for flow and pressure control. BCST on-off valves are often used in general-purpose service operations, such as emptying and filling tanks, backwash and blow-back of filters, loading and uploading, and sequencing of equipment and products in batch applications.

    BCST - A Top Rated On-off Valve Suppliers In China

    BCST on-off valves are a much less precise instrument than the control valve. It allows a flow not immersed or completely off the flow. There are a couple of different styles of on-off valves, including ball, plug, butterfly, and globe valves.

    Automated diaphragm-on off-valve

    Pneumatic Diaphragm Onoff Valve

    Pneumatic Piston Globe Onoff Valve

    Pneumatic Onoff Gate Valve

    Pneumatic Piston onoff ball valve

    Pneumatic Onoff Ball Valve


    Pneumatic Butterfly Onoff Valve

    Solenoid on off valve

    Solenoid On off Valve

    Electric Onoff Gate Valve

    Electric Onoff Butterfly Valve


    Electric Onoff Ball Valve

    BCST your Expert On-Off Valves Supplier in China

    As an expert on-off valves manufacturer in China, BCST supply a full package solution to live various mediums. Whether you’re an end-user or an engineering company, BCST will provide you with on-off valves technical support and repair.

    BCST on-off valves are widely employed within the method industry. BCST has 2 factories covering 30000 m3, 5 set CNC machine centers with 10 set process machines workshops, BCST is your one-stop on-off valve solution from China.

    BCST is one amongst the leading reliable and stable on-off valves manufacturers in China. If you’re searching for an experienced manufacturer for your next project, with strong technical background, professional team, and budget-friendly products, BCST is your most suitable choice.

    BCST group

    BCST On-Off Valves Quality Control

    • Technical software caculation
    • Technical team meeting
    • CAD drawing confirmation
    • Installation
    • Calibration
    • Chemical Analysis
    • Mechanical Propery
    • dimension Checks
    • Visual Checks
    • Non-destruction Examination
    • Shell test
    • Sealing test
    • Leakage test
    • Air test
    • Function test
    • CNC machining
    • Visual checks
    • Dimensional checks
    • Liquid penetration test
    • Surface Polish
    • Painting
    • Visual inspection
    • Thickness checks
    • Visual checks
    • Liquid penetration
    • Test
    • Hardness test
    • Lapping
    • Dimensional checks
    • Marking
    • Exported wooden box

    Get the Latest Catalogue Now!

    Why Purchase On-off Valve From BCST

    On-off Valve -FAQ

    What is the role of pneumatic on/off valves in industrial systems?

    Several industries are using pneumatic on/off valves. Conclusion: There help control the flow of the gases and liquids and at the high-level pressure. Or according to the industries dealing with compression of the atmospheric pressure. A manual or electrical system is available to operate these on/off valves. The pneumatic on/off valves are now an essential asset of all the industries, and they are using it widely in making paper, pharmaceutical productions, and colouring applications. The usage of pneumatic on/off valves is extremely useful in hazardous areas or even if there is any occurrence of leakages. You need to use the pneumatic on/off valves during the manufacturing processes because of their safety protocols at high-level. Install the pneumatic on/off valves for protection purposes and proper working methodologies.

    Why and which industries prefer the pneumatic on/off valves?

    Many industrial applications use pneumatic on/off valves along with the rubber seat in soft texture. These on/off valves are useful at high-extend because of facilitating in terms of support, functionalities, and reliability in all the controlling methods.

    Reasons for replacing other control methods and preference of pneumatic on/off valves:

    Below are the reasons for preferring pneumatic on/off valves nowadays in the industries:

    • The cost is pneumatic on/off valves is relatively low
    • Even the pneumatic on/off valves are smaller in size
    • The availability of pneumatic on/off valves are in lightweight
    • The pneumatic on/off valves are highly accurate and precise
    • There are no damages and blockages inside the pneumatic on/off valves

    Industrial sectors using the pneumatic on/off valves:

    Following industries that are using pneumatic on/off valves in their pneumatic systems:

    • Cement or silo
    • Controlling units of compressed air and vacuum
    • Handling of granulate and pigments
    • Vacuum toiletries systems
    • Coating with the powder
    • Plastics/glass/ceramics industries
    • Systems of weighing and metering
    • In the making of wine
    • Treatment of water waste
    • Foodstuff
    • Pharmaceutical industries

    Why is it better to use the tight on/off valves and the squeeze-closing sleeve?


    Designs and functionality of tight on/off valves:

    The rubber hose and the tight on/off valves that squeeze close are designed to tightly close or open completely to make sure that there are no leakages. The design of these on/off valves is relatively simpler in terms of working and design compared to the ball valve. For instance, to bring repeatability and reliability in the operation of tight on/off valves. The usage of these on/off valves is essential where there is an immediately cutting of the flowing medium is the priority.

    Features of tight on/off valves:

    • High-level actuating force
    • Exact geometry for the sealing
    • Longer lifespan of the material for the seating purposes
    • Always bring assurance regarding the repetition in terms of performance of tight on/off valves along with elevation in integration

    Reasons for the selection of the tight on/off valves and consideration as the best choice:

    You must know that squeezing tight on/off valves continuously offers the flowing medium continuous on/off operation. It is among the reasons for the preference of tight on/off valves on the other kinds of valves. A rubber sleeve is also available in the housing to provide 100% assurance for the tight closing. The tight on/off valves reaction is fast and quick enough, not more than a second. These are the reasons that point towards selecting tight on/off valves.

    Advantages of using tight on/off valves:

    • There are no blockages in the tight on/off valves without considering the kind of flowing medium
    • Completely shut off without any leakages
    • There are no requirements for the maintenance of tight on/off valves

    Why can’t you use the on/off valves as the control valves?


    Conceptual study of on/off valves:

    Despite tuning the positioner and diagnostics, there is no possibility of using the on/off valves as the control valves because the friction present on the sealing surfaces and pin connections can be the reason for the backlash and windup the shaft. Therefore, there is a usage of positioners and piston actuators.

    Detail description of on/off valves:

    The use of on/off valves is to meet the specifications for leakage purposes. Some industries use the control valves to control the processes, not the piping. You need to mention some percentage for the dead band and stick-slip according to the particular range of the throttle. On the tight on/off leakage class, there needs to be the specification of the on/off valves. According to its features, you can even use the ball valves and butterfly valves for the flowing medium. Also, check the table in the catalogue for the coefficients of the flow at high and low levels to select the particular valve according to it. You need to test the control valve regarding the flow element at an internal level. Its position is moving according to the readback of the positioner for the changes of small signals. The repetition of the tests is very important whenever the valve is servicing and the flowing measurement of the low noise sensitivity.


    To control the width of the pulse and to avoid the plugging issues, on/off valves are the right choice than the control valves because of the design of the fast and large size strokes.


     For throttling, never use on/off valves as the control valves. In isolation circumstances, you can’t use the control valves as the on/off valves.

    What are the function of on/off valves and the insertion of a rubber tube?


    Functionality and working of the on/off valves:

    There are two kinds of air operating on/off valves. It usually opens on/off valves whenever there is no air pressure and no opening of the on/off valves. There is a rubber tube present in the body of the on/off valves that you can name the bladder, sleeve, or membrane. These start squeezing the altogether single time when they’re the pressure starts applying on the on/off valves. According to the dependency on the rubber tube of the on/off valves that are fit in the on/off valves, there is a requirement of the air pressure for closing the on/off valves. The usage of a typical rubber tube needs 2.5 bar of pressure for closing the on/off valves. The other membranes of the rubber tube are of silicon need 3 bar of pressure for closing the on/off valves. After applying the air pressure in the on/off valves, the rubber hose is 100% closing. Therefore, it is the closing of the flowing medium inside the pipeline. The functionality of on/off valves and the second kind of actuation is usually a version of closing. These on/off valves are in the closing position with the help of single or multiple pistons for the large size on/off valves. One more time, whenever the pressure applies, the rubber bladder inside the on/off valves starts opening with the help of pistons whose attachment is with the rubber hose. The rubber hose permits the medium to flow freely. When the air pressure starts taking off the functions of on/off valves, it starts opening again to its 100% normally closing condition.

    The function of manual on/off valves:

    You can operate the manual on/off valves manually or along with the handwheel for opening and closing of the valves. These are unique on/off valves with a rubber bladder whose connection is direct with the piston controlled by the handwheel. If you turn the wheel clockwise, it will manually close the on/off valves or vice versa.

    Benefits and functions of on/off valves

    • The function of on/off valves ensures to stop the flowing medium whenever the on/off valves are in an entirely close position.
    • The on/off valves surrounding any product always ensure sealing of 100% level.
    • There is a completely 100% bore offering by the on/off valves whenever the on/off valves are in the opening position
    • It is straightforward to maintain the on/off valves, and the only wearable component in the on/off valves is a rubber hose.

    How can you maintain the on/off valves?

    Usually, the on/off valves keep undergoing multiple tasks on a daily basis. The materials of the on/off valves from which the medium starts flowing can cause damage to the safety of the on/off valves. It is due to most of the materials being corrosive. To increase the life of on/off valves, you need to maintain the on/off valves properly. The maintenance of the on/off valves is dependent on the kind, brand, and material because the manufacturing of the on/off valves is different from one another.

    Steps for maintaining the on/off valves:

    • The best option for maintaining the on/off valves is to follow the manufacturers’ instructions. These instructions are available with the manual while purchasing the on/off valves. All the steps are present inside the manual.
    • While checking the on/off valves regularly, there are some points that you need to follow. Firstly, make sure that the on/off valves are working correctly even there is no flowing of the media. You need to be careful while increasing the pressure that it can cause damage to the pipelines. Regular checking of the on/off valves means inspection of the on/off valves is every 6 months. Also, check the on/off valves in particular situations like there can be excess water from the heavy rainfall or flooding. The extra water inside the on/off valves can also damage the pipes.


    • The cleaning of the on/off valves is part of maintaining the on/off valves. Any kind of dirt particle inside the on/off valves can affect the working of the on/off valves. Also, checking the wearing of the parts of on/off valves like the ball can stop the flow of the medium present in the on/off valves. There can be defects in the material, so the best option is to contact the manufacturers to replace the parts. You can even call professional assistance to replace on/off valves.

    How to select the on/off valves?

    The on/off valves are the kind of safety valves whose purpose is to stop the flowing of the materials such as water, air, or gas. Sometimes, it is very important to avoid the flow of some specific materials to prevent any mishaps. Mainly when there is an involvement of flowing of the flammable gases. There are two main kinds of on/off valves that are automatic and manual.

    Manual on/off valves:

    The manual on/off valves shut down automatically, while the automatic on/off valves shut down with the help of electronic systems. It is your own choice which one you want to choose. The installation of manual on/off valves are at home, and there is a lever available for the shutdown of the flowing fluid inside the pipeline. The working of the compression types is through the turning of the knob that starts moving the shaft in an upward and downward direction. Their installation is most probably in the toiletries and water pipelines of the houses. When selecting safety on/off valves, the best choice is to choose the on/off valves according to the compatibility with the construction material. So, no issue rises during the flow of the medium in the on/off valves.  

    Automatic on/off valves:

    The automatic on/off valves are particularly for industrial applications. In the industrial processes, there can be the involvement of hazardous liquids like gasoline and others. These on/off valves are not suitable for the home because they are expensive and available along with the complex systems.

    After going through the types of on/off valves, you need to check the actual reasons for using the on/off valves. If you want the on/off valves for the kitchen sink, then select the on/off valves of stainless steel. The selection of this material is to provide assurance and avoid rusting whenever the water starts flowing from the pipes. The correct method to select the on/off valves is according to the pipelines’ usage and kind of material. After knowing about the particular type, you must all go through the reviews regarding the on/off valves. This helps save your money and time when selecting the right and safe on/off valves for your place. There are different types of on/off valves available to select accordingly to make your system start working efficiently.

    Final thoughts:

    The on/off valves are a device that is useful in terms of routing the process for the flowing fluid to various areas, starting and proceeding towards the methods in batches. There is also an availability of automatically and safely shutting down facilities. There are different on/off valves, so this range is available for you and your applications. BCST is the most reliable manufacturer and supplier of on/off valves available in China and delivering across the globe. Contact the team of BCST today if you are looking for economical on/off valves and highly skilled technicians.

    Get in Touch with Us