5
PRIMING AND STARTING
Before starting the pump, the pump body must be full of
liquid. Manual priming may be required if the system does not
automatically fill the pump body with liquid. Vent plugs are
provided on the pump body to vent the air. While venting the
air from the pump body, the pump shaft should be rotated a
few times by hand.
The pump should be started with the discharge valve closed
and the suction valve fully open. After the pump is up to oper-
ating speed the discharge valve should be opened slowly.
IMPORTANT: The pump should never be operated with the
suction valve closed or throttled. This could result in cavita-
tion. Cavitation will cause the pump performance to fall-off
and also, overtime, can cause impeller and/or casing damage.
NOTE: On 6x6x9
1
/
2
and 6x6x11 there will be volute and stuff
box wear rings.
CAUTION: Seal Damage Hazard
Do not run pump dry, seal damage may occur. Failure
to follow these instructions could result in property damage
and/or moderate personal injury.
Shaft
Slinger
Packing Gland
Cover Plate
Cap Screw
Impeller
Washer
Volute Cap
Screw
Flush Line
Impeller Key
Bracket
Gland Bolt
Packing Rings
Lantern Ring
Drip Drain
Cover Plate
Volute Gasket
Impeller
Lock Washer
Impeller
Impeller Cap Screw
Volute
Shaft Sleeve
FIGURE 5
CROSS SECTION OF SERIES 1580 INLINE MOUNTED CENTRIFUGAL FIRE PUMP
