General Information; Pump Description; General Instructions - Liquiflo CENTRY 620 Series Installation, Operation & Maintenance Manual

Liquiflo Installation, Operation & Maintenance Manual
Section 1: General Information
This manual covers the Centry
was formerly called Model 62.) The long-coupled mounting option using the Liquiflo Power Frame is also
covered in this manual.
1.1

Pump Description

Model 620 is an end-suction sealed centrifugal pump with the following features:

New design has closed-bracket with integral seal housing configurable with Type 21
or Type 9T single mechanical seal

Legacy design configurable with Type 9A single mechanical seal, Type 9T double
mechanical seal, or lantern ring/packing

Close-coupled or long-coupled mounting options

Choice of threaded or flanged ports

Back pullout design to simplify maintenance

Driver-supported shaft that simplifies pump design

Standard reduced impeller sizes to simplify pump selection
The pump Model Number and Serial Number are stamped on the Stainless Steel Tag that is attached to the
pump's housing. The Serial Number is also permanently stamped on the pump's volute.
The Model Number completely describes the pump's construction and is required when ordering either a new
pump or replacement parts for an existing pump. The Model Number for the sealed pump is based on a 7-
position Model Coding system that is described in Section 1.4 (see page 5).
1.2

General Instructions

The materials of construction of the pump are selected based upon the chemical compatibility of the fluid being
pumped. The user must verify that the materials are suitable for the surrounding atmosphere.
If the fluid is non-conductive, methods are available to mechanically ground the isolated shaft. This is only
necessary if the surrounding atmosphere is extremely explosive or stray static charges are present.
Upon receipt of your Liquiflo pump:
1) Inspect pump and verify that it was not damaged during transit.
2) Inspect tag and verify that the Model Number of the pump matches the Model Number of the
pump that was ordered.
3) Record the following information for future reference:
Model Number:
Serial Number:
Date Received:
Pump Location:
Pump Service:
®
Series Sealed, Close-Coupled Centrifugal Pump, Model 620. (Note: Model 620
3
®
Centry Series Centrifugal Pumps
Model 620 – Sealed