Professional Onoff Valve Manufacturer in China

BCST on/off valve is a device that allows for flowing the fluid without any break or stops the whole flow. You can use these valves for proceeding to several locations. It can even start or stop the processes in batches. The functionalities are also available in the on/off valve. It can safely get off the channel. The whole path is available for the flowing of the liquid—these characteristics you can avail from the types of on/off valves present in the market. The position of the on/off valve shows the workings happening internally.

What is the working principle of the on/off valve?


The functions of the on/off valve are to manage the flowing of the fluid or gas. When there is no pressure of air, then the valve opens automatically. In the body of the valve, you will see the rubber tube. The tube shrinks when you apply the pressure to close the valve. You can complete the larger valves with one or more pistons. The on/off valve also opens through the force applied. The piston in the rubber tube is pulled and helps the fluid to flow easily. When the pressure gets revert, it comes back to its Cloe normal state.

What is the difference between the on/off valve and control valve?


Whenever you are setting fluid controlling system, and there are various kinds of valves available. It depends on your own choice. The control valve helps in controlling the flow of the liquid that exists in the system. You can maintain the variables like pressure, temperature, rate of flow, and liquid level at some particular points. Whereas, on/off valve is the less accurate Instrument as compared to the control valve. The on/off valve will also help flow the fluids without any hurdle or shut. Mainly, it makes the route of the fluid to process.

What is the symbol of the on/off valve?


The International Standard ISO 1219-1 has created the pneumatic symbols. It also comprises the symbols, which are also the graphical representation. They are the symbols of the systems where the fluid is flowing along with its components. But, the marking of the valves are the references from the CETOP RP 68 P. It is the community of fluid power that exists in Europe.  The representation of the functionalities of the on/off valve is in numerals. It is in pairs and separated by strokes; for example, 3/2, the first number shows the ports present. The second number indicates the state’s number that the valve will achieve.

symbol-onoff valve

What are the parts of the on/off valve?

The following are the parts of the on/off valve:

  • A-jet on/off valve repairing kit
  • Oil-free actuator
  • Dual on/off valve rebuilding kit integrated
  • Dual on/off valve rebuilding kit not integrated
  • Dump valve jewel integrated on/off valve
  • Dump valve jewel not integrated on/off valve
  • Retained screw on/off valve
  • Inlet body on/off valve
  • Repairing Taj and pulling to open
  • Screw for retaining on/off valve
  • Actuator free from oil
  • Fixing kit of on/off valve
  • Body of on/off valve (integrated)
  • Body of on/off valve (non-integrated)
  • Tilting the jet and on/off the valve body
  • Set of the screw
  • Sealing the on/off valve

For details regarding the price, you can contact our team of BCST.

What are the types of on/off valves?


Butterfly valves: Those on/off valves that turn quarterly make the fluids flow in and out. Most power plants, processing plants, and wastewater plants use a butterfly on/off valve to regulate and process the flow. It handles the pipelines whose diameter is large. Most butterfly valves are smaller in size. But it is cheaper as compared to the ball valve. Sometimes, it is difficult to handle the butterfly valves wherever the pressure is high. But, still, it is among the preferred choices due to its simple design.

The main components butterfly on/off valve is the valve’s body, disk, seat, and steam.

Structure & Features of Butterfly Valve:

International Compatibility:

  • ISO 5211 mounting flange
  • Enables direct mounting of various actuators

Anti-Blow Out:

  • Retaining ring preventing the blow out of stem on pressure

Precision Splined Shaft:

  • Pinless connection with a disc to avoid leakage from the disc and convenient replacement of valve parts

Manually Polished Disc Edge:

  • Disc machined by CNC and polished manually ensures long life and low torque and bubble tightness.

Rubber Seat Design:

  • Replaceable rubber seats designed with rib and groove, preventing movement against valve body ensure the strong sealing and stability.

Wafer or Lug Connection:

  • The body could be wafer or lug type suitable for various flange standard

    Who are the manufacturers of on/off valves?


    There are manufacturers of on/off valves around the world. Most of them belong to China, Japan

    , France and UK. BCST is among the manufacturers who are based in China.  For 30 years, we are manufacturing and delivering high-quality products to different parts of the world. Our specialties are in the research area and dealing with several instruments. It also includes an on/off valve. While manufacturing on/off valves, the material we use is stainless steel, cast iron, and steel. It also deals with specific requirements. A range of valves are available on/off valves, instrumentation valves, and control valves included.


    What is the on/off valve actuator?

    As the industries are progressing, they need new equipment for receiving efficient outcomes. It is also the solution to the problems that technicians, designers, and engineers have faced. The actuator is one of them. The actuator is a black box in which input, output, and circuit make the valve work. In the control mode, there are two kinds of valve actuators found. One is modulating valve actuator, and the other one is the on/off valve actuator. The on/off valve actuator is also called an open-loop actuator. In this kind of actuator, two essential functions are performed, and operations of the valve are dependent on it.  Its primary purpose is to entirely open or close the valve.

    What are the specifications of the on/off valve?

    For listing the specifications of the on/off valve, the data-sheet is provided to the customer. In this sheet, the following things are included and collected to complete the requirements.

    • Place of the installation
    • Type of the connection in need
    • The total diameter of the pipe
    • How much will be the maximum temperature and pressure
    • The type of actuator to use
    • The kind of applications require
    • Any additional requirements
    • The type of on/off valve to use
    • Which size of the valve is necessary?
    • What should be the temperature of the surroundings
    • How many ports and connections do you need


    What are the applications of on/off valves?


    The applications of industries commonly use on/off valves. Like:

    • Cement industry
    • In the handling of granulate and pigments
    • In the sectors of ceramics, glass, and plastic
    • For treating the wastewater
    • By pharmaceutical companies and in foodstuffs
    • In the making of wine
    • In weighing and metering systems
    • For coating with the powder
    • In the methods of toiletry and vacuum
    • Controlling the units of compressed air


    The industrial valves are with a rubber hose. It controls the flow and has become popular in different sectors. No employees need training while using it.

    Is there any example of an on/off valve?


    The most common example of an on/off valve is a water on/off valve.

    These valves are available in your own house. The main valve is the most important one as you can shut off your home’s water supply through it. The location of this valve is either in the basement, or the box is placed underground out of your house. In addition, different fixtures like sinks, heaters, and toilets have an on/off valve put nearby.

    During repairs, you can shut off the on/off valve without any hindrance. Mostly, it is available in two types: opened one and closed one. Both of them are used individually according to the need.


    What is the purpose of using an on/off valve?


    Mainly the on/off valve act as the part in the units of gas preparation. It saves money and time. It is the best approach for consideration. The equipment present in the on/off valve is easy to maintain without impacting the remaining system. It avoids the air reaching the point where the application is working. The operations of the on/off valve are simple so that it can handle the risks. Even, there is some maintenance going on or any equipment fails. While closing, some of them on/off valves are locked. For this reason, you can use it in many industries.

    What are the uses of an on/off valve?


    On/off valves work precisely as the name shows that is it gets turned on and off. You can use the on/off valve in emergencies. It also helps in aligning the channel of the whole system. So that’s it doesn’t get shut. You can also open or close the channel without facing any difficulty. There are different types of on/off valves that facilitate differently and behave according to the situation. But it would help if you controlled some factors.

    What is the difference between gate on/off valve and ball on/off valve?


    Although both gate and ball on/off valve functions are the same, their structure and working are different. There is a ball and stem which turn in the horizontal direction. Therefore, it is best suitable for the applications on and off control, and no pressure drop is required.

    Gate valves can be open by lifting the rectangular gate. All the gate on/off valve characteristics is the same as the shut on/off valve. However, the rate of failure is less in ball valves as compared to gate valves. You can use the gate valves wherever the flow of the fluid is in a straight-line direction.

    Is an on/off valve same as a control valve?


    A control valve is a device used for regulating and manipulating the flow of fluids. The fluids can be steam, oil, gas, or water. It is among the commonly used elements for controlling that are used in the industries. The response to the signals is given and sent from the controllers.  It is designed so that the essential variables can process like flow, level, and temperature. The on/off valves and control valves are similar, but their controlling way is different. Control valves are very accurate, and on/off valves do turn on and off.

    How to shut water on/off valve?


    The water that comes to your house from the fixture. It has a valve that you can control. The on/off valve is the main valve that might shut the whole water supply of your house. First, you need to look at and recognize the meter box.  Make sure it is covered with plastic or cement. It must be near your place or in the walking area of the street. After looking for it, do digging. You will see the pipe, and this is the location of the pipe. Turn it off in the correct position. It is a little bit tricky. A proper tool is required to shut off the water on/off valve. 

Final thoughts:

BCST is skilled in manufacturing different kinds of valves and uses high-quality materials in the valves. You can mention your requirements if a customized solution is required. Directly call us on your number for any query related to the on/off valve. Or you also send an email to our team members:

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