Industrial valves control, isolate, or redirect the flow of liquids, gases, steam, and slurries in piping systems. The main types include gate, globe, ball, butterfly, plug, check, diaphragm, and control valves; each is designed for different operating needs. For example, a ball valve typically opens or closes with a 90° turn, while a gate valve moves a closure element linearly. The right choice depends on the fluid, pressure, temperature, flow-control requirements, connection, and maintenance plan—not just pipe size.
In this guide, we explain how the common valve types work, where they are generally used, and what buyers should confirm before requesting a quotation. At Kaiwei (凯维), we recommend sharing the operating conditions and required specifications with your supplier so the proposed valve can be checked against the actual service.
An industrial valve changes or regulates flow within a process or utility system. Depending on its design, it may provide on-off isolation, prevent reverse flow, throttle flow, or direct fluid between paths. A valve is only one part of a piping system, so its selection should be considered alongside the pipe, actuator, control system, and installation conditions.
Valve performance depends on more than the body style. Materials, trim, end connections, seat design, actuation, and pressure-temperature limits all affect suitability. A valve selected for clean water, for example, should not automatically be assumed suitable for abrasive slurry, corrosive chemicals, or high-temperature steam.
A gate valve raises or lowers a gate across the flow path. It is commonly selected for on-off service where the valve is intended to be fully open or fully closed. Because its closure element moves out of the main flow path when open, it can be suitable for applications where a straight-through passage is preferred. Gate valves are generally not the first choice for frequent throttling, since partially open operation can contribute to wear or unstable flow depending on the service.
Globe valves use a moving disc or plug and a stationary seat to control flow. Their design can make them useful for throttling and flow adjustment, although the pressure drop and flow characteristics depend on the specific valve design and operating point. Buyers should confirm the required flow rate, pressure conditions, and control range instead of choosing a globe valve solely by nominal pipe size.
A ball valve uses a rotating ball with a bore through its center. In many common designs, turning the handle or actuator 90° changes the valve between open and closed positions. Ball valves are widely used for shutoff because they can provide a direct flow path when open, but their suitability for throttling depends on the design, materials, and service conditions. Port configuration and seat material should also be checked against the process fluid.
A butterfly valve controls flow with a disc that rotates inside the pipe. Its compact construction can be useful where installation space or valve weight is a consideration, and it is available in a range of body and seat arrangements. Buyers should review the required shutoff performance, fluid compatibility, pressure and temperature limits, and connection style. The disc remains in the flow path, so the effect on flow should be considered in system design.
Plug valves use a cylindrical or tapered plug with a passage that aligns with the flow path when open. They are used for isolation or flow routing in selected services, with design details varying by application. Before specifying one, confirm the fluid, sealing requirements, operating frequency, and maintenance expectations. A plug valve’s suitability cannot be established from its general type alone.
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Check valves are designed to allow flow in one direction and restrict reverse flow. Common designs include swing, lift, and dual-plate configurations, each with different installation and operating considerations. They typically operate in response to flow rather than a handwheel or actuator. Buyers should consider the system’s flow conditions, installation orientation, and potential for water hammer or unwanted valve movement.
Diaphragm valves use a flexible diaphragm to separate or regulate the process flow, making them options for certain corrosive, clean, or solids-containing services when the selected materials and design are appropriate. Control valves are selected as part of an instrumented control loop to adjust flow in response to a signal. For these applications, the valve body is only one consideration: actuator sizing, control characteristics, instrumentation, and process data must also be reviewed.
| Valve type | Typical function | Key selection consideration |
|---|---|---|
| Gate | On-off isolation | Confirm whether the valve will operate fully open or closed |
| Globe | Flow adjustment or throttling | Evaluate pressure drop and required control range |
| Ball | Shutoff and selected flow-routing duties | Check port, seat, fluid, and actuation requirements |
| Butterfly | Isolation or flow regulation in suitable designs | Review disc effects, shutoff needs, and connection style |
| Check | Restricting reverse flow | Confirm direction, orientation, and flow conditions |
| Diaphragm | Isolation or regulation in selected services | Verify diaphragm and body compatibility with the fluid |
Start with the fluid composition, phase, cleanliness, and any solids or contaminants. Record the minimum and maximum operating pressure and temperature, as well as normal flow and any start-up or upset conditions. For instance, a hypothetical request might specify a 50 mm nominal pipe size, 10 bar operating pressure, and 80°C process temperature; these figures describe a buyer’s example, not a universal valve rating.
Decide whether the valve needs to isolate, throttle, prevent backflow, or direct flow. This decision narrows the suitable designs before you compare materials or price. If the valve will be operated frequently or controlled automatically, include the expected operating method and cycle requirements in the specification.
Body, trim, seat, and seal materials should be reviewed for compatibility with the process fluid and operating conditions. Confirm the required pressure-temperature rating from the manufacturer’s technical information; a pressure class should not be interpreted as a single allowable pressure at every temperature. Also specify end connections, face-to-face dimensions where relevant, applicable design requirements, and any documentation needed for the project.
Manual, electric, pneumatic, or hydraulic actuation may be appropriate depending on access, operating frequency, control requirements, and the site’s available utilities. Consider installation orientation, space for an actuator or handwheel, inspection access, and the method for replacing wear parts. These factors can affect lifecycle cost even when the initial valve prices are similar.
The main types of industrial valves differ in how they control flow and in the conditions for which their designs may be suitable. To choose one, first define the process fluid and operating limits, then identify the valve’s function, verify materials and ratings, and confirm connections and operation. There is no single valve type that is best for every application.
For a project inquiry, prepare the valve size, fluid, pressure, temperature, required function, end connection, actuation preference, and any applicable project specifications. Share these details with Kaiwei (凯维) to discuss suitable valve options and clarify the information needed for a product quotation.
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