Plunger Valve

Plunger Valve

African Valve is a recognized Plunger Valve Manufacturer in South Africa, delivering high-performance flow control valves specifically designed for regulating pressure and flow in large-diameter pipelines. These valves are ideal for high-pressure applications where smooth, vibration-free modulation is required without damaging the pipeline or actuator.

Function & Working

Plunger valves operate by moving a cylindrical plunger axially within a sleeve to vary the flow passage. The streamlined design ensures linear flow control, even at high differential pressures. They are often used in conjunction with control systems for precise regulation of water flow and pressure in utility networks and hydropower systems.

Advantages

• Linear flow control across the full stroke

• Suitable for high-pressure, large-diameter lines

• Minimal cavitation and vibration

• Long service life under dynamic conditions

• Low torque operation and maintenance-friendly design

Industries Served

• Hydropower Plants

• Municipal Water Supply

• Irrigation Networks

• Pumping Stations

• Dams and Reservoirs

• Industrial Water Treatment

Key Components

• Body – Heavy-duty cast steel or ductile iron for structural strength

• Plunger – Stainless steel or coated alloy, precision-guided for accurate modulation

• Sleeve – Flow contour-optimized for smooth control

• Guide Rails and Bearings – Minimize friction and ensure stability

• Sealing System – O-rings and metal seats for leak-proof performance

• Actuation System – Manual, electric, or hydraulic actuators for smooth operation

Technical Specifications

• Design Standards: EN 1074, DIN 3356, AWWA C507

• Body Materials: Ductile Iron (GJS-500), Carbon Steel (WCB), Stainless Steel (CF8M), Bronze-lined

• Plunger Materials: SS304, SS316, Stellite-coated, Rubber-lined

• Pressure Ratings: PN10 to PN40 / Class 150 to Class 300

• Size Range: DN100 to DN2000

• End Connections:

  • Flanged (ANSI B16.5 / DIN)

  • Butt Weld (BW – for high-pressure installations)

• Actuation Options: Manual gear, electric actuator, hydraulic control

• Special Features:

  • Anti-cavitation internal design

  • Flow-guided cone sleeve

  • Designed for long-stroke, low-friction operation

  • Engineered with precision by a trusted Plunger Valve Manufacturer in South Africa