Circor IMO E12L Series, Руководство по обслуживанию изделия

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I. 1 PUMP ASSEMBLY
NOTE: Prior to assembly, all parts should be cleaned and inspected for nicks and burrs.
Replace all worn or damaged parts. Imo Pump recommends automatic replacement of
mechanical seal (24), ball bearing (28) and O-rings (7, 10, 13, 14, 19 and 70) when these parts
have been disturbed from their previously installed positions. Prior to assembly, wipe all parts
including fasteners with a lubrication fluid that is compatible with the process liquid.
NOTE: When assembling the pump, refer to Figure 2 – Mechanical Seal, Figures 3, 4 and 5 –
Assembly Drawings and Table 3 – Pump Parts List.
I.2 Assemble and Install Housings into Case
Install back-up ring (6) and O-ring (7) in groove of housing (4). Install vent pins (8) in bores of
housing (4). Install housing (4) in outboard end of case (1) with O-ring (7) and back-up ring (6)
positioned toward inboard end of pump. Install housing (3) in case (1), ensuring that bores of
housing (3) engage vent pins (8) installed in housing (4). Push housings into case (1) and align bore
of housing (4) with stop pin (9) threaded bore in top of case. Use caution not to damage O-ring (7)
during this assembly step. Install stop pin (9) in top of case (1), ensuring that stop pin is properly
engaged in housing (4) slot. Install O-ring (10) on plug (11) and thread plug into bore in top of case (1).
I.3 Assemble and Install Inboard Cover (Discharge Side)
For Rotor sizes 137 to 200 – Install spacer (16) in case 1).
For rotor sizes 137 and 187 – Install spacer (65) in case (1). Install back-up ring (6) and O-
ring (7) in groove of inboard cover (12). Install balance piston bushing (15) and stop (17) on
inboard cover (12).
NOTE: Back-up ring should be installed toward inboard end (discharge side) of pump when
inboard cover (12) is installed.
For rotor size 187 and 200 – Install cap screws (66) in stop (17).
For rotor sizes 118, 137 and 156 – Install Truarc rings (66) in grooves of inboard cover (12).
Install O-rings (19) in flange grooves of case (1). Using cap screws (18) and (washers (60) 118
rotor size only), assemble inboard cover (12) to case (1). Torque cap screws to values
indicated in Table 4.
NOTE: Ensure the port of the inboard cover (21) is properly aligned with the case (1) port.
With the inboard cover (12), housings (3 & 4) and (spacer (16) if applicable) installed in case (1),
push in all internal parts from outboard end (suction side) of pump until all parts are properly seated.
Using a depth gage, measure the distance from the exposed flat surface of housing (3) (for rotor sizes
118, 156 or 200) to flange of case (1) – OR – measure from spacer (65) (for rotor sizes 137 or 187) to
case (1) to flange to determine required spacer (5) thickness. Subtract 0.010 ± .005" (0.25 ± 0.13 mm)
from measurement.
NOTE: The working clearance between the inlet head (21) and spacer (5) is 0.010 ± 0.005"
(0.25 ± 0.13mm).
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