How to choose the right needle valve
Where to use needle / plunger valves?
Needle and plunger valves can be used in many different applications with a need for flow or pressure regulation. In water treatment and distribution, dams, reservoirs, power plants and industry needle valves are e.g. used for:
• Flow control
• Pressure regulation
• Pump start
• Turbine by-pass
• Discharge
• Reservoir inlets
• Air regulation
When to use needle / plunger valves?
Compared to diaphragm control valves, needle and plunger valves can be used with higher differential pressure, and our standard needle valve range covers a pressure range up to PN40, and on request up to PN100. Our standard size range covers DN80 to DN1600, and on request up to DN2000. Needle valves can be manually actuated or can be controlled by electrical, hydraulic or pneumatic actuation.
Needle valve variants and configurations
We offer a wide range of high quality needle valves (plunger valves) in different configurations and with optional extras for actuation and cavitation prevention.
Each valve is specified according to relevant selection criteria for its specific application. Upon order or request it is therefore mandatory to provide information about hydraulic data (flow rate and pressure), installation design and requested actuation. This ensures that the valve has an optimal performance for the given installation. By using our dedicated software for sizing calculations, we provide a fluid and cavitation report under the hydraulic conditions. The report will guarantee a cavitation free valve.
Needle valve configurations
We offer a selection of optional extras for actuation and cavitation prevention. Each valve is fitted to the actual operating data and works without cavitation even at major pressure differences.
Upon request we can provide needle valve solutions with custom designed actuation configurations:
• Worm gear box and handwheel
• Electric actuator
• Hydraulic
• Hydraulic brake and lift unit
• Double acting hydraulic piston
• Simple acting hydraulic piston
• Double or single acting pneumatic actuator
Needle valves with cavitation trim
• Intrusive • Dissipating cylinder • Non intrusive
• Dissipating plate
• Venting device