ITT GOULDS PUMPS 3180, Инструкция по установке, эксплуатации и обслуживанию

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5.4 Impeller-clearance check
The impeller-clearance check ensures the following:
• The pump turns freely.
• The pump operates at optimal efficiency for long equipment life and low energy consumption.
5.4.1 Impeller axial clearances
Total axial adjustment
The total axial adjustment of the impeller between the suction sideplate or case ring and the stuffing box
cover should be between 0.028 in. and 0.087 in. (0.7 mm and 2.2 mm).
Cold temperature axial clearance for the open and closed impeller
Table 6: Cold Temperature Axial Clearance for the Open Impeller
Temperature Clearance
50°C | 122°F 0.38 mm | 0.015 in.
100°C | 212°F 0.45 mm | 0.018 in.
150°C | 302°F 0.50 mm | 0.020 in.
200°C | 392°F 0.55 mm | 0.022 in.
230°C | 446°F 0.65 mm | 0.026 in.
Table 7: Cold Temperature Axial Clearance for the Closed Impeller
Temperature Clearance (Group A) Clearance (Group B)
50°C | 122°F 0.38 mm | 0.015 in. 0.51 mm | 0.020 in.
100°C | 212°F 0.45 mm | 0.018 in. 0.58 mm | 0.023 in.
150°C | 302°F 0.50 mm | 0.020 in. 0.64 mm | 0.025 in.
200°C | 392°F 0.55 mm | 0.022 in. 0.69 mm | 0.027 in.
230°C | 446°F 0.65 mm | 0.026 in. 0.79 mm | 0.031 in.
Table 8: Group A and B Sizes
Group A 3X6-12, 3X6-14, 4X6-12, 4X6-14, 4X6-16, 6X8-14,
6X8-16, 4X6-19, 4X8-19, 8X8-14, 6X10-16, 6X10-19,
6X10-22, 10X10-14, 8X10-16, 8X10-19
Group B 6X10-25, 8X10-22, 10x12-16, 10X12-19, 10X12-22,
8X12-25, 10X14-25, 12x14-19, 12X14-22, 14x14-16,
16X16-19, 14X16-22
5.4.2 Check the Shearpeller™ axial clearance
The Shearpeller™ requires a large front clearance in order to handle stringy solids. The front clearance
between the Shearpeller™ and the suction sideplate is 0.375 in. (9.50 mm). With this large clearance,
the pump is not as sensitive to small changes in the front clearance. No cold setting is required with the
Shearpeller™ option due to the large clearances.
1. Back the Shearpeller™ up until the back pump-out vanes contact the seal chamber.
2. Move the Shearpeller™ forward 0.062 in. (1.57 mm).
The total axial adjustment of the Shearpeller™ between the suction sideplate and the seal chamber is
0.437 in. (11.00 mm).
5.4 Impeller-clearance check
Models 3180, 3181, 3185, and 3186 Installation, Operation, and Maintenance Manual 51