Plunger Valve/Needle Valve
Needle (Plunger) Valves
IO Valve’s Plunger (Needle) Valves are specially designed for water supply and distribution systems, providing precise and stable flow control in pumping stations, transmission lines, and hydro projects. Their hydraulic design ensures smooth regulation, low head loss, and effective cavitation control, making them ideal for reliable operation in critical water infrastructure applications.
Size Range: DN 65 – 1400 Pressure Rating: PN 10|16|25|40|63
Material of Construction
Body : Ductile Iron
Cylinder : SS 304/SS 316
Disc : SS 304/SS 316
Hinge : SS 304/SS 316
Body & Disc Sealing : SS 304/SS 316
Stem : SS 304/SS 316
Stem Nut : Bronze
Sealing Gasket : EPDM (Food Grade)
Cylinder O Ring : EPDM (Food Grade)
O Ring’s : NBR
Coating : Epoxy Powder Coating with Min.250µ
Flange Drilling : EN1092-2
Medium : Water
Operating Temperature : -10°C to +80°C
Features
Ø Pump discharge and pump bypass lines
Ø Pressure reducing and pressure sustaining stations
Ø Flow control in water transmission and distribution pipelines
Ø Reservoir inlet and outlet control
Ø Hydroelectric power plants (turbine bypass and regulation)
Ø Raw water intake and treatment plants
Ø Irrigation and canal systems
Ø Surge control and cavitation-prone locations
Ø Cooling water and auxiliary water systems
Ø High-head water conveyance pipelines
Typical Applications
Needle (Plunger) Valves use axial disc movement driven by a gearbox-operated crank mechanism to provide accurate flow control over a wide range.
The streamlined flow path ensures low head loss and high flow capacity in the fully open position.
Optimized internal geometry and optional cavitation control trims minimize cavitation, noise, and vibration, ensuring long service life in high-pressure water applications.
Guide rings welded to the body ensure smooth, stable disc movement with minimal friction.
Gearbox rotation precisely adjusts the disc position to control the flow area.
A special sealing system ensures bubble-tight shut-off when closed.
Pressure-independent disc design keeps operating torque low, even in large sizes.