GRS-18000-E-01
4
811SP SERIES
Figure 1 – 811SP Series
Case Part Features
INSTALLATION
For installation instructions, including baseplate
installation, grouting and shaft alignment
procedures, see the Griswold 811 ANSI Series
IOM: https://www.psgdover.com/docs/default-
source/griswold-docs/ioms/811_iom.pdf, pages
6-15.
OPERATION
For pump operation instructions, including
setting the impeller clearance, proper lubrication,
starting the pump and troubleshooting, see the
Griswold 811 ANSI Series IOM, pages 16-19.
When setting the impeller clearance of an
811SP Series pump, Table B in the Appendix of
this document is to be used to determine the
target assembled impeller clearance. With this
value, the Impeller Clearance Adjustment
procedure found in the Appendix of the Griswold
811 ANSI Series IOM should be used.
The following section on priming the pump is
unique to the 811SP Series and replaces the
“Priming” section of the Griswold 811 ANSI
Series IOM.
Priming the Pump
The Griswold 811SP Series pumps are self-
priming and do not require a foot valve or a
manual priming procedure prior to startup, aside
from the initial charge of liquid for the case
priming chamber. During the priming stage, the
self-priming pump transfers air from the suction
side to the discharge side of the pump, drawing
a vacuum on the suction side and lifting the
liquid up the suction pipe. An accumulation of air
in the discharge piping hinders this process and
can stall priming progress. Therefore, in some
installations an air vent or permanent bypass
line from the discharge piping is required to vent
the accumulating air pressure.
See Figure 2 – 811SP Series Priming with By-
Pass Line.
Figure 2 – 811SP Series
Priming with By-Pass Line
Steps to Prime the 811SP Series Pump:
1. Re-check motor to ensure that the
connections are correct. Check that thermal
overload relays are properly sized and set
for operation
2. Verify that the coupling guard and all other
safety-related devices and instrumentation
are in place and in working order
3. Initially fill the pump with enough liquid to fill
the priming chamber (see Table A)
4. Check that any suction isolation valves are
completely open. Never use the suction
Top
Centerline
Discharge
Integral
Priming
Chamber
Self-Venting
Design
Elevated
Suction
Centerline for
Self-priming
By-pass Line
