Huckepack vane pumps operate on the "once through" principle. A small amount of sealant from an external reservoir is continuously metered into the pump cavity for vacuum sealing and lubrication. The sealant washes the internal surfaces, preventing contaminate buildup. It is then discharged with the process vapour into the exhaust system, where it is separated and removed.
1. Sealant Reservoir
2. Inlet
3. Vane
4. Rotor
5. Water Jacket
6. Exhaust
7. Sealant-Behind-the-Vanes
8. Gas Ballast Port
9. Muffler
10. Interstage Support Plate
11.
Exhaust Check Valve
12. Bottom Stage Rollers
13.
Flushing Reservoir (optional)
14. Sleeve
(optional)
15. Bypass Valve
(interstage)
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