Needle valves and ring needle valves have been popular for many years for the following reasons:
- Pressure balanced piston makes for easy actuation and inherent low forces on components. This leads to a longer lifespan, and hence the good reputation.
- They have the excellent ability to open slowly and withstand the high velocities experienced.
- In applications where the pump control valve has to fill an empty line on a regular basis, this valve can be fitted with a custom made trim; whereby the initial opening stage provides a high pressure drop. This means that when the valve is fully open, pressure drop is much lower.
Although perceived as better that gate or butterfly valves, pressure drop is a lot higher than other designs available. For a full consultation on your specific valve needs, get in touch through our contact page.