Aurora Pump - 420 Series

Aurora Pump

420 Series
Multi-Stage
Split Case
Pumps

· Capacities to 1800 GPM
· Heads to 600 Feet
· Temperatures to 275 F

Introduction
Standard
Options
Misc.

Model 421

INTRODUCTION: The horizontal split case pump has long and properly been used for the handling of liquids where the utmost in reliability and accessibility are paramount. Billions of gallons of liquid have been pumped by split case double suction pumps and billions more will be pumped considering the rapid industrial, agricultural and commercial expansion. The Aurora 420 Series pumps make a significant contribution to the customer requirements for pumps on this type of service. The 420 Series is a modern design based on Aurora Pump's 50 years experience with the design, sales and manufacture of horizontal split case pumps. Look through this bulletin and see what real accomplishments can be made when an imaginative approach is taken to the customer's problem of moving liquids within a piping system. See Aurora now!; MODELS 421 are horizontally baseplate-mounted with a driver flexibly coupled to the pump. This design is recommended where floor space is readily available and where flooding of the installation is not possible.; MODELS 422 are vertically mounted and utilize flexible shafting between the driver and the pump. This model is frequently used on difficult applications where flooding installation is a Possibility.; MODELS 423 are vertically mounted with an elevated driver coupled directly to the pump through a flexible coupling. Model 423 is very popular for installations where available floor space is limited and where possible flooding is marginal.



STANDARD: · Bronze fitted pump construction; · Bronze shaft sleeves; · Dynamically balanced impellers; · Bronze case wearing rings; · Multi-volute on 2" and larger pumps; · Stainless steel impeller key; · Regreaseable ball bearing; · Single row ball bearing (in board); · Double row ball bearing (outboard); · Mechanical seals ... single unbalanced (Model 422 and 423); · Interwoven, graphite/Teflon lubricated acrylic yarn packing rings (Model 421); · Internal bypass between casing and stuffing box (First Stage); · 125# suction., 250# discharge. ASA flanges; · 250 psi case working pressure; · Carbon steel shaft; · Stuffing box bushings; · Lifting lugs; · Hydrostatic test; · Cast integral bearing arms; · Water stingers and grease seals; · Coupling guard (Model 421)



OPTIONAL: · All iron, all bronze or special alloy pump construction; · Hardened 440C Stainless steel shaft sleeves (packing only); · 316 stainless steel shaft sleeves (mechanical seal); · Impeller wearing rings; · Oil lubricated ball bearings (model 421 horizontal pump); · Mechanical seals ... single unbalanced (Model 421); · Stainless steel or monel shaft; · External bypass between casing and stuffing box; · Steel drip rim, formed steel or fabricated steel bases; · Double extended shaft(Model 421); · Right or left hand rotation; · Certified performance test; · Packing with lantern ring (Model 421); · 250# ASA suction & discharge flanges; · Water cooled bearings

GO VERTICAL AND PUT 2 PUMPS WHERE ONLY ONE HORIZONTAL WOULD FIT.: Aurora's space saving vertical split case pumps have long been recognized for their reliability. This reputation in the field of vertical installations has been re-emphasized since the introduction of the Model 423 as pumps of unmatched quality.

VERTICAL PUMPS PROVIDE DISTINCT ADVANTAGES OVER HORIZONTAL PUMP CONSTRUCTION:: Less floor space required. Inline piping arrangement allows piping in any direction. Elevated motor protects against potential flooding if the pump station is in a low area. Additional features described for the horizontal pumps are also found in the vertical pumps. In addition, there are several features unique only to verticals.

Last Updated: August 26, 1997