User manual Pomac PLP Lobe pump
CE/PLP (1406) EN-12 11
8. Position connections and shaft
P0 = connections horizontal, shaft top = standard,
P1 = connections horizontal, shaft bottom
P2 = connections vertical, shaft right hand from shaft end
P3 = connections vertical, shaft left hand from shaft end
9. Self-draining execution
S1 = 45°
S2 = plane
S3 = 2x 45°
10. Additional radial / axial clearance between lobe and pump casing,
C = Radial clearance at the lobe circumference and axial clearance at the rear and front side
C1 = + 0,05
C2 = + 0,1
C3 = + 0,15
C4 = +0,2
C–1 = – 0,05
11. Internal surface treatment
O1 = mechanical polish to 0,8 micron
O2 = electro polish to 0,5 micron
12. Hardened pump parts
G1 = pump casing, lobes, cover, Hardened acc. FDA
G2 = pump casing, cover, Hardened acc. FDA
G3 = lobes, Hardened acc. FDA
G4 = pump casing, lobes, cover, Plasma nitrided (non-FDA)
G5 = pump casing, cover, Plasma nitrided (non-FDA)
G6 = lobes, Plasma nitrided (non-FDA)
13. Heating jacket
H1 = heating jacket on front cover
H2 = heating jacket on rotor case
H3 = H1 + H2
H4 = Electrical pump cover heating
14. Safety relief valve
V1 = safety relief valve, spring-loaded
V2 = safety relief valve, pneumatically controlled
15. Lobes / timing mechanism
R1 = Bi-Wing lobe with timing mechanism
R2 = Quattro lobe with timing mechanism
16. Material options.
W1 = pump casing, lobes, pump cover: 1.4435
W2 = lobes non-galling
W3 = pump casing, lobes, pump cover: Hastelloy CX2MW N26022
W4 = pump casing, lobes, pump cover: 1.4571, 316 Ti
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