Slurry Pump Installation Requirements
(1) Pre-installation Inspection
The pump has been inspected and tested before leaving the factory. To ensure optimal performance, it must be installed correctly. Prior to installation, verify the following according to the packing list:
Correct model and parameters
Completeness and integrity of all components
Availability of all technical documentation and quality certificates
After confirmation, thoroughly review the relevant technical materials, especially the <>. Fully understand the technical requirements and operational procedures before proceeding with installation. Avoid arbitrary operations.
(2) Pump Installation and Alignment
Horizontal pump units should be installed using the secondary grouting method. After installation:
The unit centerline must align with the foundation centerline.
The center height deviation should not exceed ±2 mm.
The level tolerance of the unit is 0.1 mm per 1000 mm.
For directly coupled units (using couplings):
Unit coaxiality is ensured through coupling alignment. Two alignment methods are available:
Straight edge and feeler gauge method:
Align coupling outer diameters using a straight edge. The maximum misalignment (δ) at any point should not exceed 0.10 mm [Fig. 3(a)].
Measure the gap between coupling faces using a feeler gauge. The maximum deviation (Δ = δ1 - δ2) should not exceed 0.10 mm [Fig. 3(b)].
Dial indicator and feeler gauge method:
Mount a magnetic-base dial indicator on one coupling hub. Rotate the shaft ("barring"). The dial indicator reading (measuring runout on the opposing coupling hub) should not exceed 0.15 mm [Fig. 3(c)].
Measure the coupling gap with a feeler gauge. The maximum deviation should not exceed 0.10 mm [Fig. 3(b)].
For belt-driven units:
Ensure parallelism between the pump shaft and motor shaft, typically by aligning the pulleys.
For small center distances: Use a straight edge against the pulley faces.
For large center distances: Use a taut wire aligned with the pulley faces, as shown in Fig. 4.
(3) Pump Inlet and Outlet Piping Configuration and Requirements
① Suction Piping
Pipe Diameter: Should match the pump inlet diameter or be slightly larger. The principle is to avoid pump cavitation while preventing slurry settling in the line.
Suction Gate Valve: Install a gate valve (same size as suction pipe) for pump maintenance.
Expansion Joint: Install an expansion joint between the pump suction flange and suction piping to facilitate pump disassembly/assembly.
② Discharge Piping
Pipe Diameter: Related to slurry properties and settling velocity. Generally equal to or slightly larger than the pump outlet diameter.
Discharge Gate Valve: Install a gate valve matching the discharge pipe diameter.
Pressure Gauge: Install on a straight section of pipe between the pump outlet and the first valve.
③ Piping Configuration Notes
Refer to piping layout Fig. 5.
Flow control valves must be installed on the discharge side only. Never use valves on the suction line for flow control, as this can cause cavitation.
(4) Seal Water and Cooling Water Piping Configuration and Requirements
Configure seal water and cooling water piping as shown in schematic Fig. 7.
Pumps with mechanical seals have two exposed pipe connections on the seal chamber:
The connection on the pressure gauge side is the inlet.
The opposite connection is the outlet.
Bearing housings lubricated by grease do not require cooling water.
Packing glands lubricated by grease do not require seal water.
