3
n
3
Specifications
Notes:
1. Rated performance (head/capacity) represents the maximum discharge head/capacity measured with
water at 70° F (21° C).
2. Liquid temperature range:
32 - 176° F (0 - 80° C)
Ambient temperature range: 32 - 104° F (0 - 40° C)
3. Slurry: Standard pumps are not suitable for slurry applications. Only MDH-F(AV) models are capable of
handling applications with a slurry hardness 80Hs or below, grain size maximum 2 mil, maximum density
5% wt. Contact Iwaki Walchem or your distributor for details.
4. Specific gravity capability at maximum flow with maximum impeller when fluid viscosity is 1cp. Specific
gravity fluids up to 2.0 can be handled with appropriate trimming of impeller. Consult Iwaki Walchem or
your distributor for recommended model and impeller trim.
5. The MDH-401-7, when coupled to a 1½ HP motor should use a flywheel drive magnet assembly, part
number MFL1361.
Note that the MDH-(F)401 with a 1 HP motor does NOT require the flywheel drive magnet.
Maximum
Impeller
Specific
*4
Flow
Maximum
Motor
Connections
Model
Code
Gravity
Capacity
Head/TDH
Output
Suction & Discharge
Series
(Size)
Capability
(GPM)
(FT)
(HP)
(NPTM)
MDH-400
6
72
37
½
7
66
42
¾
1½ x 1½
MDH-401
6
1.10
85
66
1.0
7
92
70
1½
*5
MDH-422
6
95
79
2.0
2 x 1½
MDH-423
6
120
78
3.0
MDH-425
6
1.20
158
100
5.0
MDH-F400
G
1.10
66
42
¾
1½ x 1½
MDH-F401
G
92
70
1½
MDH-F422
X
1.20
95
80
2.0
2 x 1½
MDH-F423
X
120
77
3.0
MDH-F425
G
158
100
5.0
