Valves are mechanical devices used in piping systems to start, stop, regulate, or direct the flow of fluids (liquid, gas, or slurry).
Function: Used for on/off control (fully open or fully closed).
Has a sliding gate (wedge) that blocks or allows flow.
Not suitable for throttling.
Common in water supply, oil, and gas pipelines.
Function: Used for throttling (flow regulation) and shutoff.
Has a disk that moves up and down against the flow.
Higher pressure drop compared to gate valves.
Common in cooling water, fuel, and chemical systems.
Function: Quick shutoff, quarter-turn operation (90°).
Uses a spherical ball with a hole through it.
Provides tight sealing, easy operation.
Common in gas lines, water systems, and compressed air.
Function: Used for on/off and throttling.
Has a disc that rotates (quarter-turn) inside the pipe.
Lightweight, compact, and cost-effective.
Common in water supply, HVAC, and fire protection.
Function: Allows flow in one direction only (prevents backflow).
Operates automatically (no hand operation).
Common in pumps, water systems, and compressors.
Function: Similar to ball valve, quarter-turn operation.
Uses a cylindrical or conical plug with a hole.
Good for quick operation but less efficient for throttling.
Function: Uses a flexible diaphragm to control flow.
Suitable for corrosive and slurry fluids.
Common in chemical and pharmaceutical industries.
Function: Automatically releases pressure when it exceeds a set limit.
Essential for boilers, compressors, and pressure vessels.
Function: Uses a pinching mechanism on a flexible tube to stop/allow flow.
Excellent for slurries, corrosive, and abrasive fluids.
Function: Used for precise flow control (fine adjustments).
Small size, common in instrumentation and fuel systems.
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