Attaching Gear Pump - Nordson VersaBlue VBN 50 Manual

Attaching Gear Pump

1
1
2
3
1 2 1
Fig. 7-3
E 2008 Nordson Corporation
NOTE: The gear pump may only be screwed on when the melter is cold.
NOTE: The sealing surfaces on the plate and the pump must be clean.
Always replace any O-rings.
Required tool: Torque wrench
1. Apply high temperature grease (Refer to section Maintenance,
Processing Materials) to the new pump.
CAUTION: Pump types SF and DF seal metallically. Do not apply
high-temperature grease.
2. Apply high temperature grease (Refer to section Maintenance,
Processing Materials) to the pump fixing screws and attach only when
the tank is cold. Tighten screws crosswise using a torque wrench.
Torque: 25 Nm / 220 lb in for pump types SN and DN.
Torque: 50 Nm / 440 lb in for pump types SF and DF.
3. Refer to Important Regarding Coupling
The axial offset, meaning the sum of the four gaps (4, Fig. 7-3), must
result in at least 2 mm (0.08 in) of air to accommodate the heat
expansion during operation.
Permitted radial offset: 1 mm (0.04 in)
4 4 4 4
Permitted angular offset: 1°
4. Slide coupling half onto the shaft of the new pump.
5. Center the coupling disks (1) to one another and allow the coupling links
(2) to hang vertically (Refer to Fig. 7-3). Turn the coupling half on the
motor shaft to its position by hand.
6. Tighten coupling screws (3).
7. Heat melter to operating temperature and open tank isolation valve
again.
VBN w/o Control System
7-3
Repair
P/N 7146386A