Bell & Gossett P2001409A Series e-1532 - Manual (Page 26)

Balancing
It is recommended that impellers trimmed more than 5% in diameter be rebalanced per
ISO 1940 grade G6.3.
Angle cut guidelines
Model e-1532-4AD pump impellers must be angle cut at reduced diameters according to
the following information.
ØA ØB
C
Figure 4: 4AD impeller trim — 0.125 in. (3.17 mm) increments
A B C
Hydraulic diameter, nominal, as
shown on selection curves
Diameter at impeller inlet side
shroud
Trim angle
From maximum diameter 7 in.
(177.8 mm) to 6.125 in. (155.6 mm)
Use diameter from selection curves 0 degrees, no angle
6, 5.875, 5.75, 5.625 in. (162.4 to
142.9 mm)
B = A plus 0.250 in. (6.35 mm) 8 degrees
5.5, 5.375, 5.25, 5.125, minimum 5
in. (139.7 to 127.0 mm)
B = A plus 0.375 in. (9.53 mm) 8 degrees
Pre-assembly inspections
Guidelines
Before you assemble the pump parts, make sure you follow these guidelines:
• Inspect the pump parts according to the information in these pre-assembly topics
before you reassemble your pump. Replace any part that does not meet the required
criteria.
• Make sure that the parts are clean. Clean the pump parts in solvent in order to remove
oil, grease, and dirt.
NOTICE:
Protect machined surfaces while you clean the parts. Failure to do so may result in
equipment damage.
Areas to inspect
Inspect the pump regularly for leaking seals, worn gaskets, and loose or damaged
components. Replace or repair these parts as required.
Shaft and sleeve inspection
Inspection criteria
Inspect the shaft and sleeve according to this criteria:
Maintenance
24 Series e-1532 INSTRUCTION MANUAL