Control Valve
Control Valve
African Valve is a specialized Control Valve Manufacturer in South Africa, supplying precision-engineered valves that automatically regulate fluid flow, pressure, or temperature in piping systems. Built for accuracy and repeatability, our control valves are integral to maintaining process efficiency across critical industries such as oil & gas, power, and chemical processing. Whether in modulating or on-off control, our valves are designed to perform reliably under varying flow conditions, high pressure, and corrosive environments.
Function & Working
Control valves regulate the rate of flow by varying the size of the valve opening. They respond to a control signal to adjust the valve trim position, ensuring the process variable—such as flow rate, pressure, or temperature—stays within the desired range. This makes them suitable for continuous regulation as well as emergency shutoff where required.
Advantages
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High-precision flow and pressure control
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Reduced manual operation and energy waste
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Enhanced operational safety in automated systems
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Ideal for modulating as well as shut-off applications
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Built to perform under fluctuating process conditions
Types Offered
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Electric Control Valve
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Pneumatic Control Valve
Industries Served
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Oil and Gas
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Power Generation
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Water and Wastewater
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Petrochemical
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Marine and Offshore
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Paper and Pulp
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HVAC and District Cooling
Key Components
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Valve Body: Houses all internal parts and withstands operating pressure.
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Bonnet: Covers the valve body and provides sealing around the stem.
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Trim (Plug & Seat): Controls the flow rate by adjusting the opening.
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Actuator: Powers the movement of the valve, using electric or pneumatic energy.
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Positioner: Receives control signals and adjusts actuator movement for precise modulation.
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Stem: Connects actuator to the trim, transmitting motion.
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Packing & Gland: Prevent leakage around the stem while allowing movement.
Technical Specifications
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Design Standards: ASME B16.34, API 623, IEC 60534
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Body Materials: WCB (Cast Carbon Steel), CF8M (Stainless Steel 316), WC6, Duplex, Inconel
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Trim Options: SS304, SS316, Stellite, 17-4 PH
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Pressure Ratings: Class 150 to 2500 / PN10 to PN250
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Size Range: DN15 to DN600
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End Connections:
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Flanged (Raised Face or Ring Type Joint)
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Butt Weld (BW) – welded permanently for high-pressure lines
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Socket Weld (SW) – compact welded ends for smaller sizes
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Threaded (NPT – National Pipe Thread)
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Actuation Options:
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Pneumatic (spring return or double acting)
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Electric (24V, 110V, or 230V)
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Smart positioner-driven modulation
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Special Features:
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Fire-safe construction and emission-tested sealing
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Anti-cavitation and low-noise trim options
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SIL-certified designs for safety-critical use
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Custom solutions from a certified Control Valve Manufacturer in South Africa
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