Conventional valves are distinguished by their operating mechanisms, influencing fluid control within various systems. Specific valves are tailored for specific fields or unique operational needs, often serving as subcategories of broader classifications.

• Ball Valve – Designed for rapid shut-off with minimal pressure loss. A simple 90-degree turn enables full closure, making it highly efficient.
• Butterfly Valve – Ideal for managing flow in large pipelines, utilizing a rotating disc for quick adjustment.
• Gate Valve – Primarily functions as an on-off valve, offering low resistance to flow when fully open.
• Globe Valve – Well-suited for precise flow regulation, using a movable element over a seat.
• Plug Valve – Offers streamlined on-off control, though it introduces slight pressure resistance.
• Non Return Valve (Check Valve) – Allows fluid to flow in a single direction, preventing back-flow.
• Knife Valve – A compact variation of the gate valve, designed for managing slurries and powders.
• Needle Valve – Provides meticulous control over fluid flow, using a slender, tapered stem.
• Pinch Valve – Specifically designed for controlling slurry flows via a pinching mechanism.
• Piston Valve – Facilitates the regulation of fluids containing suspended solid particles.
• Choke Valve – Consists of a solid cylinder shifting within another, controlling flow by varying the exposure of openings. Commonly used in high-pressure oil and gas applications.
• Diaphragm Valve – Employs a flexible diaphragm to regulate fluid movement, widely used in pharmaceutical processes.
• Solenoid Valve – Operates electromagnetically, controlling hydraulic or pneumatic fluid movement.
• Spool Valve – Functions similarly to a choke valve, directing hydraulic fluid flow effectively.
• Flow Control Valve – Maintains and adjusts fluid flow to achieve a desired rate.
• Pressure Balanced Valve – Designed to stabilize fluid pressure within a system.
• Pressure Reducing Valve – Modulates pressure to maintain optimal levels within pipelines.
• Relief Valve – Activates automatically to release excess pressure and prevent hazardous conditions.
• Sampling Valve – Facilitates fluid extraction for testing and analysis.
• Automatic Valve – A valve that operates automatically through the inherent properties of the medium.
• Actuated Valve – Valves operated manually, electrically, hydraulically, or pneumatically.
• Rotary Valve – A valve in which the closing element rotates relatively along the axis of the sealing surface of the seat.
• Flat Gate Valve – This type of gate valve can be divided into those with and without guide holes. The plate gate valve with guide holes can be used for pipe cleaning, while the plate gate valve without guide holes can only be used as a closing device on the pipeline.
• Center Line Butterfly Valve - Butterfly valve in which the rotary center of the butterfly plate (i.e., the center of the valve shaft) is located on the center line of the valve body and the sealing section of the butterfly plate.
• Double eccentric Center Butterfly Valve - The rotary center of the butterfly plate (i.e., the valve shaft center) forms a dimensional bias with the sealing section of the butterfly plate and another dimensional bias with the center line of the valve body.
• Three eccentric Center Butterfly Valve - The rotary center of the butterfly plate (i.e., the valve shaft center) forms a dimensional bias with the sealing surface of the butterfly plate and another dimensional bias with the center line of the valve body; the center line of the sealing surface of the valve body forms an angular bias with the center line of the valve seat (i.e., the center line of the valve body).
• Blast Valve – Protects structures from sudden pressure surges.
• Ceramic Valve – Incorporates highly durable ceramic discs for enhanced longevity, particularly with abrasive fluids.
• Duckbill Valve – A flexible, self-actuating one-way valve.
• Foot Valve (Bottom Valve) – A check valve placed at suction line ends to maintain proper flow direction.
• Hydrodynamic Vortex Valve – Uses fluid dynamics for passive flow regulation.
• Pilot Valve – Controls pressure or flow within secondary valve systems.
• Pinch Valve (Beach Ball Valve) – A single-part soft plastic check valve molded onto inflatable equipment.
• Pulse Valve – Enables rapid pulsing movements for precision fluid control.
• Stopcock – Isolates or restricts fluid flow within pipes.
• Thermal Expansion Valve – Modifies refrigerant flow in response to temperature changes.
• Vacuum Breaker Valve – Prevents contaminated water backflow into potable water supplies.
• Fixed Ball Valve (Trunnion Ball Valve) - A ball valve with a fixed shaft.
• Flexible Ball Valve （Floating Ball Valve) - A ball valve with elastic grooves on the sphere.
• Clamp Plug Valve - A plug valve in which the plug body does not carry packing and the seal between the plug body and the sealing surface of the plug is achieved by tightening the nut below the plug.
• Gland Packing Plug Valve - A plug valve with packing seal.
• Self sealing Plug Valve - The seal between the plug and the body of the plug is mainly achieved by the pressure of the medium itself.
• Lubricated Plug Valve - A plug valve with grease seal.
• Baffler Valve - A valve in which the closing element (baffle) moves relatively between the sealing surface of the seat and outside the sealing surface of the seat but does not pass through the sealing surface of the seat.
• Outside Screw Stem Stop Valve - A stop valve with a valve stem thread on the outside of the housing.
• Inside Screw Stem Stop Valve - A stop valve with a threaded valve stem inside the housing.
• Angle Pattern Globe Valve - The inlet and outlet channels of the medium are 90-degree stop valves.
• Three Way Valve - A valve with three passages.
• Oblique Type Globe Valve - A stop valve with the valve stem and passage at a certain Angle.
• Plunger Type Globe Valve - Plunger type stop valve is a deformation of conventional stop valve. Its valve disc and valve seat are designed according to the principle of plunger; the valve disc is designed as a plunger and the valve seat is designed as a ring to achieve sealing by the cooperation of plunger and ring.
• Needle Globe Valve - A stop valve with a seat hole dimension smaller than the nominal bore.
• Throttle Valve - A pressure valve that changes the flow rate by changing the cross-sectional area of the passage with the opening and closing element (valve disc).
• Multi-disc Swing Check Valve - A rotary check valve with more than two valve discs.
• Lift Check Valve - A check valve in which the valve flap moves vertically up and down perpendicular to the axis of the seat hole.
• Butterfly Swing Check Valve - A check valve with a valve flap similar to a butterfly flap that rotates around a fixed axis (without rocker).
• Diaphragm Valve - The valve is a new structure of check valve although its use is limited by temperature and pressure but its prevention of water hammer pressure is much less than the traditional rotary check valve.
• Ball Check Valve - The rubber ball (single ball and multi-ball) moves back and forth in a short stroke along the center line of the valve body in the ball cover under the action of the medium to realize its opening and closing action.
• Safety Valve - An automatic valve that does not rely on any external force but uses the force of the medium itself to discharge a rated amount of fluid to prevent the pressure in the system from exceeding a predetermined safety value and then closes the valve and prevents the medium from continuing to flow out when the pressure returns to normal.
• Pressure Reducing Valve - A valve that reduces the pressure of the medium through the throttling of the closing element and uses the energy of the medium itself to automatically meet the predetermined requirements of the pressure behind the valve.
• Steam Trap - A valve that automatically drains condensate and prevents steam leakage.
• Steam Jacketed Valve - A steam jacketed valve is a type of valve designed with a surrounding jacket that uses steam to maintain the temperature of the fluid passing through it.