WATSON MARLOW
Abrasive slurries in brewing
A leading brewer had been using diaphragm pumps
to meter highly abrasive diatomaceous earth slurry
but was experiencing high downtime due to abrasive
wear. The brewer replaced these pumps with Bredel
hose pumps, dramatically reducing maintenance and
all but eliminated downtime. Based on this success,
the brewer installed 6 hose pumps to transfer abrasive
slurry of spent yeast. The pumps replaced rotary lobe
pumps which required excessive maintenance to
replace mechanical seals and lobes.
Dimensions
Note: measurements in inches
How to use the curves
1. Flow required indicates pump speed
2. Calculated discharge pressure
3. Net motor power required
4. Product temperature
5. Calculated discharge pressure
6. Maximum recommended pump speed
Note: The area of continuous operation
diminishes with increased product
temperatures. For product temperatures
>104F, the area of continuous operation
reduces to the corresponding red
temperature line.
Type
A
B
C
D
E
F
G
H
H1
H2
max
J
K
L
max
L1
L2
max
M
N
O
P
Q
Bredel 25
20.51
11.97
0.10
10.39
3.86
10.98
12.4
18.11
8.74
16.69
2.6
3.82
23.31
2.28
18.27
11.97
4.72
0.59
Ø0.47
Ø0.55
Bredel 32
24.84
14.76
0.10
13.0
4.13
12.76
14.17
21.18
10.24
18.39
2.83
3.66
26.93
6.7
21.42
14.57
4.72
0.79
Ø0.47
Ø0.71
7