NAVAC · HD8
NAVAC HD8 HelixDrive, 4.7 CFM Oil-Free Dry Screw Vacuum Pump, 115V 1-phase
- Flow
- 4.7 CFM
- Technology
- Oil-free dry screw
- Electrical
- 115V 1-phase
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Rotary Screw Vacuum Pumps
Rotary screw vacuum pumps from 4.7 to 3,505 CFM: Kaishan KRSV variable-speed central vacuum packages from 10 to 125 HP, and NAVAC HelixDrive oil-free dry screw pumps for clean, oil-sensitive processes.
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About rotary screw vacuum pumps
A rotary screw vacuum pump traps gas between two intermeshing helical rotors and carries it continuously from inlet to discharge. With few wearing parts and smooth, pulse-free flow, screw pumps are a natural fit for continuous duty and high-volume central vacuum systems.
We offer two kinds: Kaishan KRSV variable-speed packages from 10 to 125 HP for central plant vacuum, and NAVAC HelixDrive dry screw pumps that keep oil out of the pumping chamber for semiconductor, coating and laboratory work.
Questions? Call a guru at 866-203-9939.
Frequently asked questions
What is a rotary screw vacuum pump?
Two interlocking screw-shaped rotors turn in opposite directions, trapping pockets of gas and moving them from the inlet to the discharge. The design delivers steady, high flow for continuous operation.
Why choose a variable speed drive (VSD) vacuum pump?
A VSD slows the motor when demand drops and speeds it up when it rises, holding your set vacuum level while using only the energy the process needs. For central systems with changing demand, that usually means a large energy saving over a fixed-speed pump.
What is a dry screw vacuum pump?
A dry, or oil-free, screw pump has no oil in the pumping chamber, so nothing can back-stream into your process or contaminate the exhaust. It suits semiconductor, coating, laboratory and other oil-sensitive applications.
Can one screw pump replace several smaller pumps?
Often, yes. A single central rotary screw package can replace a bank of point-of-use pumps, reducing maintenance points and energy. A guru can size a central system from your current pumps and demand.