• High Pressure Gear Pumps


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  • FileName: KP2_KP3_GB_02-07.pdf [read-online]
    • Abstract: High Pressure Gear PumpsKP 2 / KP 3 High Pressure Gear Pumps KP 2 / KP 3Construction1 5 6 2 9 8 4 7 31 Housing2 Gear3 Drive shaft end4 Flange mounting cover5 Gasket for the pressure fields

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High Pressure Gear Pumps
KP 2 / KP 3
High Pressure Gear Pumps KP 2 / KP 3
Construction
1 5 6 2 9 8 4 7 3
1 Housing
2 Gear
3 Drive shaft end
4 Flange mounting cover
5 Gasket for the pressure fields
for axial and play compensation
6 Sliding plates
7 Single rotary shaft lip
8 Plain bearings
9 Sealing of the housing
Description
Thanks to their construction (design principle) and the hydraulics and the optimum rating of the expansion grooves
materials used KRACHT series KP 2 / KP 3 external gear pumps in the quench oil area. This leads to much lower noise levels
are suitable for use under the most stringent operating for the pumps, or for complete systems and machines.
conditions. The housing and the flange mounting cover The function of the axial play compensation that is essential
(see the sectional drawing) – both made of gray cast iron – for high pressure pumps is carried out by the sliding plates
have high dynamic load capabilities and are therefore insensi- located at the side of the gear. These have hydraulic pressure
tive to peak pressures and permanent oscillations. Large-scale fields that guarantee compensation of the axial play on all
PTFE-Pb coated plain bronze bearings on steel backs in the operating pressures.
housing and the flange mounting cover carry the extremely
finely ground bearing pins of the gear, which consists of the The sliding plates are designed so that play is compensated
driving shaft pinion. inde-pendently of the viscosity. This ensures a high degree of
volumetric and mechanical efficiency at every working point.
The tooth profiles of the gear, which is made of case hardened
steel, are ground to achieve the best running characteristics. Depending on the temperature or the media, NBR or FKM
A considerable reduction in the volume flow fluctuation and sealing gaskets can be used to meet a wide range of application
thus of the pressure pulsation is achieved through the high requirements. Multiple pump combinations of the same or
number of teeth (z = 14) and in combination with a tooth different sizes are possible.
from shaped in accordance with the special requirements of
Technical Informaiton
1. External loads 2. Direction of rotation
Because of the sturdy construction external axial loads can be The following applies for the direction of rotation
absorbed depending on the size and direction of application. (seen form the drive shaft end):
Axial loads are not permissible. Shaft rotates clockwise: direction of flow left to right.
Shaft rotates anticlockwise: direction of flow right to left.
2 KRACHT GmbH · Gewerbestr. 20 · 58791 Werdohl, Germany · fon +49 (0) 23 92 / 935-0 · fax +49 (0) 23 92 / 935 209 · web www.kracht.eu · mail [email protected]
High Pressure Gear Pumps KP 2 / KP 3
General Characteristics Operating Characteristics
Fixing type flange type Operating pressure
Inlet port pe min = -- 0.4 bar (partial vacuum)
Pipe connection flange
pe max = 2.0 bar
Direction of rotation clockwise or anticlockwise
Short-time pe max = 5.0 bar
Weight see dimension sheets
Outlet port p max = 300 bar
Mounting position optional
Fluid temperature range ϑm max = 90 °C for NBR
Ambient temperature ϑu min = -- 20 °C single rotary shaft lip
ϑu max = + 60 °C 150 °C for FKM
single rotary shaft lip
Materials Viscosity range νmin = 10 mm2/s
νmax = 600 mm2/s
Housing grey cast iron
Recommended filtration Filter with filtration quotient
Bearings composite plain bearing bushes β 25 ≥ 75 for … 300 bar
Shafts and gear wheels Surface-hardened and ground β 40 ≥ 75 for … 100 bar
Recommended
case hardened steel in accordance
viscosity range ν = 30 … 45 mm2/s
with DIN 17210
Discharge flow see table page 5 and 6
Sealing gaskets 1 NBR single rotary shaft lip
ϑ 90 °C Power consumption see table page 5 and 6
2 FKM single rotary shaft lip Hydraulic fluids Mineral oil in accordance with
ϑ 150 °C DIN 51524/25
Motor oil in accordance with
DIN 51511
ATEX (KP 2 only)
Flame-retardant hydraulic fluids
on request
Products and media on request.
Bio oils in HEES group can be used
up to 70 °C and at approx. 20 %
Calculation Formulas for Hydropumps reduced max. pressure (please enquire)
Characteristic Data, Formula Signs, Units
Discharge / input flow Q l/min
Geom. discharge / input flow Vg cm3/r Pump
Pressure p bar
Speed n 1/min Characteristic data for:
Torque M Nm Vg · n1 · η vol l
Discharge flow Q2 =
Power P kW 10 3 min
Total efficiency η tot –
p · Vg
Volumetric efficiency η vol – Drive torque M1 = Nm
20 · π · η hm
Hydr. / mech. efficiency η hm –
Flow velocity v m/s p · Q2
Input power P1 = kW
Pipe diameter d mm 600 · η tot
General: Recommended value for KRACHT products
Qth = Vg · n, η tot = η vol · η hm in the nominal operating point
η tot η vol
M = 9549 · P v = 21.22 · Q
n d2 KP ≈ 0.90 ≈ 0.95
KRACHT GmbH · Gewerbestr. 20 · 58791 Werdohl, Germany · fon +49 (0) 23 92 / 935-0 · fax +49 (0) 23 92 / 935 209 · web www.kracht.eu · mail [email protected] 3
High Pressure Gear Pumps KP 2 / KP 3
Technical Data KP 2
Displace- Geom. Max. Peak Max. Moment Minimum speed at p = … bar
ment displace- operating pressure speed of 1/min
Nominal ment pressure inertia
size x 10-5
Vg pb pmax nmax J
cm3/r bar bar 1/min kg m2
1) 2) 3) …100 …120 …150 …180 200
20 19.7 250 300 3000 2800 34.3 700 700 800 900 1000
25 24.6 250 300 3000 2800 40.5 600 600 700 800 900
28 27.7 230 280 2800 2500 44.3 600 600 700 800 900
32 31.5 230 280 2600 2500 49.2 500 600 700 800 900
40 39.4 210 250 2800 2200 59.0 500 600 700 800 800
50 49.2 210 250 2600 2000 71.4 500 600 700 800 800
62 61.2 180 200 2200 — 86.5 500 600 700 800 —
1) S1 or S3 mode (50 % operating factor 30 1/min)
Pressure data applies for ν 30 mm2/s and n 1000 1/min
2) For housing with SAE connection Ø 32 / Ø 40
3) For housing with connection Ø 26
Technical Data KP 3
Displace- Geom. Max. Peak Max. Moment Minimum speed at p = … bar
ment displace- operating pressure speed of 1/min
Nominal ment pressure inertia
size x 10-5
Vg pb pmax nmax J
cm3/r bar bar 1/min kg m2 …100 …120 …150 …180 200
71 70.6 230 280 2500 187 700 700 800 900 900
82 81.0 210 250 2600 210 500 600 700 800 800
100 99.5 210 250 2500 252 500 600 700 800 800
112 111.10 200 230 2400 277 500 600 700 800 800
125 123.80 200 230 2300 306 500 600 700 800 800
4 KRACHT GmbH · Gewerbestr. 20 · 58791 Werdohl, Germany · fon +49 (0) 23 92 / 935-0 · fax +49 (0) 23 92 / 935 209 · web www.kracht.eu · mail [email protected]
High Pressure Gear Pumps KP 2 / KP 3
Discharge Flow and Required Input Power KP 2
Discharge flow at n = 1450 1/min
Discharge flow Q in l/min at 34 mm2/s
Nominal Pressure p in bar
size 20 60 100 140 180 200 230 250
20 27.9 27.6 27.4 27.1 26.8 26.6 26.4 26.2
25 34.8 34.5 34.2 33.8 33.4 33.2 33.0 32.8
28 39.2 38.9 38.6 38.2 37.9 37.7 37.4 –
32 44.6 44.3 43.9 43.5 43.1 42.8 42.5 –
40 55.8 55.4 54.9 54.4 53.9 53.6 – –
50 69.7 69.2 68.6 67.9 67.3 67.0 – –
62 86.8 86.4 86.0 85.6 85.2 – – –
Required input power P in kW at n = 1450 1/min
Nominal Pressure p in bar
size 20 60 100 140 180 200 230 250
20 1.39 3.57 5.75 7.92 10.10 11.19 12.82 13.91
25 1.65 4.31 6.98 9.64 12.30 13.63 15.63 16.96
28 1.82 4.79 7.75 10.72 13.69 15.17 17.39 –
32 2.02 5.36 8.70 12.04 15.38 17.05 19.55 –
40 2.45 6.58 10.71 14.85 18.98 21.04 – –
50 2.96 8.07 13.19 18.30 23.41 25.97 – –
62 3.54 9.74 15.93 22.13 28.33 – – –
Discharge flow at n = 950 1/min
Discharge flow Q in l/min at 34 mm2/s
Nominal Pressure p in bar
size 20 60 100 140 180 200 230 250
20 18.0 17.8 17.5 17.2 16.9 – – –
25 22.5 22.2 21.9 21.5 21.1 20.9 20.7 20.5
28 25.4 25.1 24.7 24.4 24.0 23.8 23.5 –
32 28.9 28.5 28.1 27.7 27.3 27.1 26.8 –
40 36.1 35.7 35.2 34.7 34.2 33.9 – –
50 45.1 44.6 44.0 43.3 42.7 42.4 – –
62 56.2 55.8 55.4 55.0 54.6 – – –
Required input power P in kW at n = 950 1/min
Nominal Pressure p in bar
size 20 60 100 140 180 200 230 250
20 0.91 2.34 3.76 5.19 6.61 – – –
25 1.08 2.82 4.57 6.31 8.06 8.93 10.24 11.11
28 1.19 3.13 5.08 7.02 8.96 9.94 11.39 –
32 1.32 3.51 5.70 7.89 10.07 11.17 12.81 –
40 1.60 4.31 7.02 9.72 12.43 13.78 – –
50 1.93 5.28 8.63 11.980 15.33 17.01 – –
62 2.31 6.37 10.430 14.490 18.56 – – –
The ratings are based on a viscosity of 34 mm2
The output of the drive motor must be chosen 20 % higher than the table value P
KRACHT GmbH · Gewerbestr. 20 · 58791 Werdohl, Germany · fon +49 (0) 23 92 / 935-0 · fax +49 (0) 23 92 / 935 209 · web www.kracht.eu · mail [email protected] 5
High Pressure Gear Pumps KP 2 / KP 3
Discharge Flow and Required Input Power KP 3
Discharge flow at n = 1450 1/min
Discharge flow Q in l/min at 34 mm2/s
Nominal Pressure p in bar
size 20 60 100 140 180 200 210 250
71 100.1 99.4 98.7 98.0 97.2 96.8 96.6 96.2
82 114.8 114.2 113.6 112.9 112.1 111.8 111.6 –
100 141.2 140.7 140.1 139.6 139.0 138.7 138.5 –
112 157.8 157.5 157.1 156.8 156.4 156.3 – –
125 175.8 175.5 175.1 174.7 174.3 174.1 – –
Required input power P in kW at n = 1450 1/min
Nominal Pressure p in bar
size 20 60 100 140 180 200 210 250
71 4.10 11.63 19.15 26.68 34.20 37.96 39.84 43.61
82 4.67 13.31 21.94 30.57 39.21 43.52 45.68 –
100 5.63 16.13 26.63 37.13 47.63 52.87 55.50 –
112 6.20 17.79 29.39 40.98 52.58 58.38 – –
125 6.81 19.60 32.39 45.17 57.96 64.35 – –
Discharge flow at n = 950 1/min
Discharge flow Q in l/min at 34 mm2/s
Nominal Pressure p in bar
size 20 60 100 140 180 200 210 250
71 64.8 64.1 63.4 62.7 61.9 61.5 61.3 60.9
82 74.3 73.7 73.1 72.4 71.6 71.3 71.1 –
100 91.4 90.9 90.4 89.8 89.2 88.9 88.8 –
112 102.20 101.90 101.60 101.20 100.90 100.70 – –
125 113.90 113.60 113.20 112.80 112.40 112.20 – –
Required input power P in kW at n = 950 1/min
Nominal Pressure p in bar
size 20 60 100 140 180 200 210 250
71 2.68 7.61 12.54 17.47 22.40 24.87 26.10 28.57
82 3.06 8.71 14.37 20.03 25.68 28.51 29.93 –
100 3.69 10.57 17.44 24.32 31.20 34.64 36.36 –
112 4.06 11.65 19.25 26.85 34.44 38.24 – –
125 4.46 12.83 21.21 29.59 37.97 42.16 – –
The ratings are based on a viscosity of 34 mm2/s
The output of the drive motor must be chosen 20 % higher than the table value P
6 KRACHT GmbH · Gewerbestr. 20 · 58791 Werdohl, Germany · fon +49 (0) 23 92 / 935-0 · fax +49 (0) 23 92 / 935 209 · web www.kracht.eu · mail [email protected]
High Pressure Gear Pumps KP 2 / KP 3
Type Key
KP 2 / G G G 0 G G G G 4 DL / G G
Size 2, 3 Code for special
designs
Displacement - nominal size Sealing gaskets
KP 2: 20/25/28/32/40/50/62 1 NBR rotary shaft seal
KP 3: 71/82/100/112/125 ϑ 90 °C
2 FPM rotary shaft seal
ϑ 150 °C
Flange mounting cover design
Gear design
G Square 4-hole flange
LA = 102/145; Ø z = 105 L Shaft and pin wheel made of case-
S SAE B 2-hole flange hardened steel, ground tooth flanks
LA = 146; Ø z = 101,6
M 2-hole flange LA 78/90 Material code
Ø z = 63
Housing and bearing design
F as M, but fastener drill
holes laterally reversed D Grey cast iron with
T SAE C 2-hole flange composite plain bearings
LA = 181; Ø z = 127
V SAE C 4-hole flange Design code
LA = I 114,55; Ø z = 127
4 KP 2 (internal use)
LA = Hole spacing
Ø z = Centring diameter 6 KP 3 (internal use)
Transition piece
Direction of rotation G Transition piece for multi-stage design
KP2 with KP1
1 Clockwise
H Transition piece for multi-stage design
2 Anticlockwise KP2 with KP 2
O Standard design (1-stage pump)
J KP 3 with KP 1
Housing connection L KP 3 with KP 2 and KP 3 with KP 3
A Suction and pressure connection Ø 26 with LK 55 to Vg 50
F Suction side 1 1 ⁄ 4 " SAE connection (Ø 32) to Vg size 32 2. Shaft end
Pressure side 1" SAE connection (Ø 25) to Vg size 32
O None
G Suction side 1 1 ⁄ 2 " SAE connection (Ø 40) W External spline B 28 x 25 DIN 5482; z = 15; m = 1.75
from Vg size 40 to Vg 71
Pressure side 1 1 ⁄ 4 " SAE connection (Ø 32)
from Vg size 40 to Vg 71 Shaft ends / shaft load capacity
J Suction side 2" SAE connection (Ø 50) from Vg size 82 B External spline W 35 x 2 DIN 5480 from Vg 82 800 Nm
from Vg size 40 to Vg 71
K Cone 1: 5 500 Nm
V as A housing; for multi-stage pump version U External spline SAE B; z = 13; DP 16/32; α = 30° 180 Nm
Y as F housing; for multi-stage pump version Y Cylindrical shaft Ø 24 230 Nm KP 2; Ø 32 550 Nm KP 3
Z as G housing; for multi-stage pump version W External spline B 28 x 25; DIN 5482; z = 15; m = 1,75 450 Nm
X as J housing; for multi-stage pump version Q External spline SAE C; z = 14; DP 12/24; α = 30° 500 Nm
KRACHT GmbH · Gewerbestr. 20 · 58791 Werdohl, Germany · fon +49 (0) 23 92 / 935-0 · fax +49 (0) 23 92 / 935 209 · web www.kracht.eu · mail [email protected] 7
High Pressure Gear Pumps KP 2 / KP 3
Flange Types
Square 4-hole flange G SAE B 2-hole flange S
KP 2 only
2-hole flange F 2-hole flange M
KP 2 only KP 2 only
SAE C 2-hole flange T SAE C 4-hole flange V
KP 3 only KP 3 only
8 KRACHT GmbH · Gewerbestr. 20 · 58791 Werdohl, Germany · fon +49 (0) 23 92 / 935-0 · fax +49 (0) 23 92 / 935 209 · web www.kracht.eu · mail [email protected]
High Pressure Gear Pumps KP 2 / KP 3
Connections
Housing connection A Housing connection F
Displacement nominal size Displacement nominal size
KP 2: 20 – 50 KP 2: 20, 25, 28, 32
Inlet and outlet ports same dimensions Inlet port Outlet port
SAE 1 1⁄4 SAE 1
M 12 - 22 deep
M 8 - 17 deep M 10 - 21 deep
Housing connection G Housing connection J
Displacement nominal size Displacement nominal size
KP2: 40, 50, 62 KP3: 82, 100, 112, 125
KP3: 71
Inlet port Outlet port Inlet port Outlet port
SAE 1 1⁄2 SAE 1 1⁄4 SAE 2 SAE 1 1⁄4
M 12 - 27 deep M 12 - 25 deep
M 12 - 22 deep M 12 - 22 deep
KRACHT GmbH · Gewerbestr. 20 · 58791 Werdohl, Germany · fon +49 (0) 23 92 / 935-0 · fax +49 (0) 23 92 / 935 209 · web www.kracht.eu · mail [email protected] 9
High Pressure Gear Pumps KP 2 / KP 3
Shaft Ends KP 2 Shaft Ends KP 3
Shaft end K Shaft end B
Cone 1 : 5 External spline W 35 x 2
DIN 5480 from Vg 82
Shaft end U Shaft end Q
External spline SAE-B External spline SAE-C
z = 13 DP 16 / 32, α = 30° z = 14 DP 12 / 24, α = 30°
Shaft end W Shaft end W
External spline B 28 x 25 External spline B 28 x 25
DIN 5482 DIN 5482
z = 15, m = 1.75 z = 15, m = 1.75
Shaft end Y Shaft end Y
Cylindrical shaft Cylindrical shaft
10 KRACHT GmbH · Gewerbestr. 20 · 58791 Werdohl, Germany · fon +49 (0) 23 92 / 935-0 · fax +49 (0) 23 92 / 935 209 · web www.kracht.eu · mail [email protected]
High Pressure Gear Pumps KP 2 / KP 3
Dimensions, Weight KP 2
Displacement Weight
Nominal size Design Design Design
L M G flange S flange F/M flange
20 11, 10, 9,0
25 11.5 10.5 9.5
129 75
28 12, 11, 10,0
32 12.5 11.5 10.5
40 13, 12.5 11.5
50 142 85 13.5 13, 12,0
62 15, 14, 13,0
Dimensions, Weight KP 3
Displacement Weight
Nominal size Design Design Design
L M S flange T flange V flange
71 162 102 23, 23.5 24 ,
82 24.5 25 , 25.5
174 114
1000 26, 26.5 27 ,
1120 27, 27.5 28 ,
185 125
1250 29, 29.5 30 ,
KRACHT GmbH · Gewerbestr. 20 · 58791 Werdohl, Germany · fon +49 (0) 23 92 / 935-0 · fax +49 (0) 23 92 / 935 209 · web www.kracht.eu · mail [email protected] 11
High Pressure Gear Pumps KP 2 / KP 3
Tandem Version SAE-C Flange, Cylindrical Shaft
The pump stages shown here can work Direction of rotation: clockwise
in hydraulically separated circuits or With anticlockwise rotation the
with different media inlet and outlet ports are opposite
The drive should be by means of a compensating coupling !
Important: Unbalanced states and/or axial loads must not occur.
Ordering example
KP 3 / 100 T10X YWL 6DL1 + KP 2 / 32 S10F W00 4DL1
Displacement Displacement Nominal size
Nominal size 1st stage
2nd stage 63.71 82.100 112.125
Q L M Q L M Q L M
20
25
191 347 191 359 191 370
28
32 102 114 125
40
201 360 201 372 201 383
50
62 201 370 201 382 201 393
Along with the versions shown here, the following are available on request:
– other pump combinations (KP 3, KP 2, KP 1)
– other flange mounting cover and shaft version for the 1st stage
– three-stage pumps
12 KRACHT GmbH · Gewerbestr. 20 · 58791 Werdohl, Germany · fon +49 (0) 23 92 / 935-0 · fax +49 (0) 23 92 / 935 209 · web


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