Welch Vacuum 2585B-50 WOB-L Pinston Pump User Manual
Page 13
13
Section 7: APPLICATION INFORMATION
7.10 Vacuum System for Cell Harvesting:
-
2585B-01
-
2585Z-50
- 2585B-50
- 2585B-55
7.11 System
Components
7.12 Vacuum System for Cell Harvesting:
The vacuum system provides high throughput fl ow which allows up to 96+ sample systems to be
handled. The attached inlet trap is provided to inhibit the accidental ingestion of liquid into the pump.
Vacuum level is preset at 26”Hg with the inlet plugged. The vacuum gauge provided allows you to
check the vacuum level that is pressure below atmospheric. The reference point for the vacuum gauge
is atmospheric pressure. Be aware that atmospheric pressure will vary from day to day. As a result of
this variation, the dial vacuum gauge will indicate slightly different maximum vacuum readings from day
to day.
The preset vacuum level may be adjusted by opening or closing the orifi ce. A small leak through the
orifi ce is provided to allow easy restart of the pump if you are turning off then immediately turning on
the pump as is found with some cell harvesting applications.
By turning the screw located on top of the orifi ce clockwise, the vacuum level can be dropped to as
low as 27.6”. The deeper vacuum is particularly useful for removing sticky or viscous substance. If you
close off the orifi ce, please keep in mind this will lead to restart problems if you are turning off then
immediately turning on the pump. If you encounter a restart problem after closing the orifi ce, you will
need to incorporate into your procedure bringing the cell harvester up to atmospheric prior to restarting
the pump.
2585B-01 2585Z-50 2585B-50 2585B-55
Qty.
Part No. Description
*
*
1
1
Cap Assembly, Machined
*
*
1
2
Needle Valve
*
*
1
3
Knob
*
*
*
*
1
4
Hose Barb Fitting
*
*
1
5
Hose Barb Connector
*
*
1
6
Vacuum
Gauge
*
1
6
Vacuum Gauge
1
2, 3
4,5
6