HIGH PRESSURE INTERNAL GEAR PUMPS QPH
Internal gear pump Type QPH 2
with constant displacement volume
Characteristics
• Internal gear pump with axial and radial gap com pensation
• Radial compensation with segments
• Suction and pressure port radial
• Field of application: Industrial hydraulic
• Low noise
• Long time life
• Low pulsation (pressure pulsation ~ 2%)
• Multi flow combinations
Technical Data:
Rated Size NG |
004 |
005 |
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006 |
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008 |
011 |
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013 |
016 |
019 |
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022 |
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025 |
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Spec. volume Vth [cm3/rev.]*** |
3.8 |
5.4 |
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6.4 |
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7.9 |
10.9 |
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13.3 |
15.8 |
19.3 |
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22.2 |
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25.2 |
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Continuous operating pressure [bar]** |
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330 |
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300 |
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250 |
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250 |
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Peak operating pressure[bar]max.10sec.15%dutycycle** |
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350 |
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300 |
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280 |
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Cut-in pressure peak [bar]** |
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400 |
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325 |
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300 |
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Max. speed [rpm] |
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4,200 |
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4,000 |
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3,600 |
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Nominal speed [rpm] |
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400 – 4,000 |
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400 – 3,600 |
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400 – 3,000 |
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Operating viscosity [mm2/s] |
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10 – 300 |
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Starting viscosity [mm2/s] |
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2,000 |
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Operating medium |
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HL – HLP DIN 51 524 part 1/2 |
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Max. medium temperature [°C] |
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80 |
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Min. medium temperature [°C] |
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-20 |
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Max. ambient temperature [°C] |
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80 |
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Min. ambient temperature [°C] |
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-20 |
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Max. admission pressure (intake side) [bar] |
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2 bar absolute |
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Min. admission pressure (intake side) [bar] |
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0.8 bar absolute (Start 0.6) |
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Weight appr. [kg] |
4.9 |
4.9 |
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5.0 |
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5.2 |
5.4 |
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5.5 |
5.7 |
6.1 |
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6.3 |
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6.5 |
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Degree of filtration |
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Class 20/18/15 due to ISO 4406 |
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Efficiency ηvol |
90 |
91 |
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92 |
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93 |
93 |
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94 |
95 |
95 |
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95 |
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95 |
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Efficiency ηhm |
88 |
90 |
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90 |
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91 |
92 |
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92 |
93 |
93 |
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93 |
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93 |
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Pump noise* (measured in sound |
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chamber) dB[A] |
53 |
54 |
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55 |
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57 |
58 |
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59 |
60 |
61 |
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62 |
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63 |
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n = 1.450 |
∆p = 250 bar |
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T = 50 °C |
Medium: HLP 46 |
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*Measured in anechoic room ; Axial microphone distance 1.0 m
**For acceptable pressure at 400-1.800 rpm. Further rpm on request.
***Due to manufacturing tolerances the displacement volume could vary.
Internal gear pump Type QPH 3
with constant displacement volume
Characteristics
The new series QPH were developed particularly for the high requirements of industrial hydraulics. Their favourable noise characteristic, extremely low delivery and pressure pulsation, outstanding efficiency within broad revolution and viscosity ranges, have firmly established gapcompensated high pressure internal gear pumps among high pressure pumps. Simple combinability to multiple pumps with separate or common inlet is given.
The QPH... is a consistent advancement that already for over 40 years in the industry used gap-compensated internal gear pump technology.
Technical Data:
Rated Size NG |
014 |
|
016 |
|
020 |
|
025 |
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032 |
040 |
050 |
|
064 |
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Spec. volume Vth [cm3/rev.]*** |
14.6 |
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16.0 |
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20.0 |
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24.8 |
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32.1 |
40.1 |
50.3 |
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64.6 |
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Continuous operating pressure [bar]** |
|
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|
330 |
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|
250 |
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|||
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|
Peak operating pressure[bar]max.10sec.15%dutycycle** |
|
|
|
350 |
|
|
|
|
300 |
280 |
|
|||
Cut-in pressure peak [bar]** |
|
|
|
400 |
|
|
|
|
325 |
300 |
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|||
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Max. speed [rpm] |
|
4,000 |
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3,000 |
2,500 |
1,800 |
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Nominal speed [rpm] |
|
400 – 3,600 |
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400 – 2,800 |
400 – 2,200 |
400–1,800 |
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Operating viscosity [mm2/s] |
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10 – 300 |
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||
Starting viscosity [mm2/s] |
|
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|
|
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2,000 |
|
|
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|
Operating medium |
|
|
|
|
|
HL – HLP DIN 51 524 part 1/2 |
|
|
|
|
||||
Max. medium temperature [°C] |
|
|
|
|
|
|
|
|
80 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Min. medium temperature [°C] |
|
|
|
|
|
|
|
|
-20 |
|
|
|
|
|
Max. ambient temperature [°C] |
|
|
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|
80 |
|
|
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|
Min. ambient temperature [°C] |
|
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|
|
|
|
|
-20 |
|
|
|
|
|
Max. admission pressure (intake side) [bar] |
|
|
|
|
|
|
|
2 bar absolute |
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
||
Min. admission pressure (intake side) [bar] |
|
|
|
|
|
0.8 bar absolute (Start 0.6) |
|
|
|
|
||||
Weight appr. [kg] |
13.1 |
|
13.2 |
|
13.4 |
|
13.5 |
|
13.7 |
16.4 |
17.5 |
|
19.5 |
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|
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|
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|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Degree of filtration |
|
|
|
|
Class 20/18/15 due to ISO 4406 |
|
|
|
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
||
Efficiency ηvol |
91 |
|
92 |
|
93 |
|
93 |
|
94 |
95 |
95 |
|
95 |
|
Efficiency ηhm |
90 |
|
90 |
|
91 |
|
92 |
|
92 |
93 |
93 |
|
93 |
|
Pump noise* (measured in sound |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
chamber) dB[A] |
60 |
|
61 |
|
62 |
|
63 |
|
64 |
65 |
66 |
|
66 |
|
|
n = 1.450 |
∆p = 250 bar |
|
|
T = 50 °C |
Medium: HLP 46 |
|
|||||||
*Measured in anechoic room ; Axial microphone distance 1.0 m
**For acceptable pressure at 400-1.800 rpm. Further rpm on request.
***Due to manufacturing tolerances the displacement volume could vary.
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