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Rotary-Lobe-Pump Type PK
Basic Features:
The PK pump is designed as a modular construction system. It consists of a synchronous gear-head driving the rotary lobes contained in a pump body having suction and pressure ports and connestions.
The robust bearings are located in the gear head where they are protected from the pumped media by a mechanical sealing.Conversely,special seals containthe lubricating oil within the gear head.
Throughputs
Pump type | Pump capacity | Pressure p in bar (Rot. speed n=200 min-1.) |
Pressure p in bar (Rot. speed n=400 min-1.) |
Pressure p in bar (Rot. speed n=600 min-1.) |
Dopravní výkon cm³/ot. | ||||||||||||
Power rating | 2 | 4 | 6 | 8 | 10 | 2 | 4 | 6 | 8 | 10 | 2 | 4 | 6 | 8 | 10 | ||
PK 45/15 | l/min. NkW kW |
2 0,12 0,25 |
1,5 0,15 0,25 |
1,0 0,18 0,25 |
4 0,13 0,25 |
3 0,16 0,25 |
2 0,19 0,25 |
6 0,14 0,25 |
5 0,17 0,25 |
4 0,20 0,37 |
12 | ||||||
PK 58/25 | l/min. NkW kW |
8 0,14 0,25 |
7 0,17 0,25 |
6 0,20 0,37 |
5 0,23 0,37 |
16 0,21 0,37 |
14 0,26 0,37 |
12 0,32 0,55 |
10 0,37 0,55 |
24 0,26 0,37 |
22 0,36 0,55 |
20 0,44 0,55 |
18 0,53 0,75 |
50 | |||
PK 84/25 | l/min. NkW kW |
25 0,26 0,37 |
24 0,34 0,55 |
23 0,42 0,55 |
22 0,49 0,75 |
20 0,58 0,75 |
50 0,7 1,1 |
49 0,8 1,1 |
48 1,1 1,5 |
47 1,3 2,2 |
45 1,5 2,2 |
75 0,9 1,1 |
74 1,1 1,5 |
73 1,4 2,2 |
72 1,6 2,2 |
70 1,9 3 |
130 |
PK 84/50 | l/min. NkW kW |
50 0,7 1,1 |
48 0,8 1,1 |
46 1,1 1,5 |
44 1,3 2,2 |
100 1,3 2,2 |
98 1,6 2,2 |
96 1,9 3 |
94 2,3 3 |
150 1,5 2,2 |
148 2,0 3 |
146 2,5 3 |
144 3,0 4 |
260 | |||
PK 115/50 | l/min. NkW kW |
95 1,2 1,5 |
92 1,5 2,2 |
89 1,8 2,2 |
86 2,2 3 |
83 2,5 3 |
190 2,0 3 |
187 2,7 4 |
184 3,4 4 |
181 4,2 5,5 |
178 4,8 7,5 |
285 2,7 4 |
282 3,8 5,5 |
279 4,9 7,5 |
276 6,0 7,5 |
273 7,2 11 |
500 |
PK 115/100 | l/min. NkW kW |
190 2,0 3 |
184 2,8 4 |
178 3,5 5,5 |
172 4,4 5,5 |
380 3,8 5,5 |
374 5,2 7,5 |
368 6,5 11 |
362 7,9 11 |
570 5,8 7,5 |
564 8,1 11 |
558 10,4 15 |
552 12,8 15 |
1000 | |||
PK 175/60 | l/min. NkW kW |
315 3,4 5,5 |
305 4,7 7,5 |
295 6,0 7,5 |
285 7,4 11 |
630 6,7 11 |
620 9,3 15 |
610 12,0 15 |
600 14,7 18,5 |
945 8,8 11 |
935 12,5 15 |
925 16,2 22 |
915 19,8 30 |
1620 | |||
PK 175/100 | l/min. NkW kW |
525 5,3 7,5 |
510 7,5 11 |
495 9,7 15 |
1050 10,9 15 |
1035 15,4 18,5 |
1020 20,0 30 |
1575 15,8 18,5 |
1560 22,4 30 |
1545 29,1 37 |
2700 |
Selection Criteria for the correct pump type:
The design of rotary lobe pump necessitates a clearence gap between the rotary lobes and the internal case profile, which produces the necessary slippage. However this only becomes significant when low viscous media is pumped under pressure. In this case ,the lower rotational speed range can’t be used.
This slippage is negligible in the case of product with viscosities of more than approx. 300cP. With these products, the volumetric efficiency is practically 100%.
Displacement:
The displacement of the PK pump is absolutely dependent on the viscosity and rotational speed. The displacement of the filled pump is able to cope with at least 8m water column or a vacuum of approx. mbar.
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