Grundfos DMH 251 Installation And Operating Instructions Manual page 18

8.2.2 DMH 254, 255, 257
Z1
9mm
k
DMH 254, 255, 257
Fig. 9
Pos. Description
Z1 For double pump, motor turned by 180 °
fx, mx For double pumps
l For electrical stroke-length adjustment
l' For pneumatic stroke-length adjustment
Pump type a
DMH 254 436
DMH 255 510
DMH 257 589
Measurements in mm.
18
h
a
f
fx
m
mx
b c d e
492 156 252 207
492 156 254 228
553 170 274 280
k
f fx g h
185 260 126 718
185 260 126 869
241 333 129 980
d
j
l / l'
c
n
j k l l'
10 185 235 413
10 253 235 413
25 262 245 420
n m mx
180 225 300
180 225 300
195 290 382