Goulds Pumps 3420 - IOM - Manual (Page 16)

a machined hook lock. The impeller rings are held in place
using axial set screws.
Shaft - The shaft is a heavy duty design that minimizes
deflection and vibration. The shaft deflection is a maximum
of .002 in (.051 mm) at the stuffing box face under the worst
operating conditions. The shaft is completely dry with O-ring
seals between the impeller and shaft sleeves and the shaft
sleeves and the sleeve nuts. The standard shaft is AISI 4340
steel with an option for 316 stainless steel.
Shaft Sleeves - Shaft sleeves are standard on all pumps. They
are keyed to the shaft at the impeller and held in place using
sleeve nuts. The sleeve nuts tighten against rotation and are
secured in place with set screws.
Stuffing Box - Non-asbestos packing is standard. The
stuffing box contains a Teflon™ split lantern ring and
renewable stuffing box throat bushings. Tapped openings are
provided for water sealing from either the pump casing or an
outside source. Bypass piping is optional. Two-piece
machined split glands are standard on all packed pumps.
Mechanical Seals - Mechanical seals can be supplied as a
non-standard option. Most seal designs fit in the standard
stuffing box. Goulds does not have its own design gland, so
the gland must be supplied by the seal manufacturer.
Bearings - There are many different bearing configurations
that are offered on the 3420. Specific configurations are
dependent on pump size and group and purchased setup.
Grease lubricated ball, grease lubricated roller, flood oil
lubricated ball, ring oil lubricated ball, and ring oil lubricated
roller bearings are used on various sizes. Oil lubrication is
standard with grease optional. The bearing housings are
sealed with machined labyrinth seals or lip seals.
Baseplates - Fabricated steel bases are standard with a drip
collection chamber and a tapped drain connection. The base
is designed to be grouted and has grout and vent holes.
Soleplates for the pump only or motor only are offered as an
option.
8
3420 IOM 8/09