Liquiflo
Centrifugal
pumps
Liquiflo's Centry Series are Sealed and Magnetically-Coupled (MC) Centrifugal pumps engineered and manufactured for the user with increased needs for equipment reliability. These pumps are specifically designed to handle the lower flow applications that create maintenance problems for standard ANSI pumps operating at less than BEP. The Centry Series pumps can handle flows up to 160 GPM and heads up to 100 ft. They are available in 316 Stainless Steel or Alloy-C constructions, and with threaded or flanged port configurations.
Model 620 Sealed
Close-Coupled
Model 620 Mag-Drive
Close-Coupled
Models 621 & 622 Sealed
Close-Coupled
Models 621 & 622 Mag-Drive
Close-Coupled
Centry-Series Specifications
| CENTRY-SERIES MODEL | 620 | 621 | 622 |
|---|---|---|---|
|
Suction Port Size *in |
1 |
1.25 |
2 |
|
Discharge Port Size *in |
0.75 |
1 |
1.5 |
|
Impeller Diameter in |
3.74 |
5 |
5 |
|
Max Flow Rate GPM |
45 |
90 |
160 |
|
Max Total Head ft |
65 |
100 |
95 |
|
Max Discharge Pressure PSIG |
300 |
300 |
300 |
|
Max Temperature F |
500 |
500 |
500 |
|
Min Temperature F |
-40 |
-40 |
-40 |
|
Max Speed RPM |
3500 |
3500 |
3500 |
|
NPSHR @ Max Speed & BEP ft |
7.5 |
15 |
13 |
*Available port configurations: Threaded (NPT) or Flanged
(ANSI 150# RF).
BEP = Best Efficiency
Available Sealing Configurations
Magnetically Coupled (sealless)
The magnetically coupled or mag-drive pump is the best method for handling toxic, noxious, crystallizing, or most other hazardous liquids since it completely contains the pumpage by isolating the drive shaft inside the pump housing. With no dynamic seal to leak or replace, the maintenance issues associated with seal leakage are eliminated. All Centry centrifugal pumps are available with magnetic drive.
Mechanical Seal
Mechanical seals are offered in single and double configurations and are used for chemical applications where leakage needs to be minimized or eliminated. The single internal mechanical seal is the most common seal type and is ideal for pumping clean liquids up to 5,000 cP viscosity. The double mechanical seal requires a flushing system and is typically used when pumping liquids that are viscous, abrasive, crystalize on contact with air or are very hazardous. (Double mechanical seal available for Model 620 only.) Carbon vs. Ceramic or SiC seal faces are the primary choice for most applications up to 500 F. Teflon vs. Ceramic or SiC seal faces have extreme chemical resistance and can be applied up to 180 F and 50 PSI differential pressure.
Packing Seal
Packing is the simplest and most economical solution for pumping non-hazardous liquids where minor leakage is acceptable. Braided Teflon packing is the primary choice for applications up to 350 F. Graphoil packing is available for high temperature applications up to 500 F. (Available for Model 620 only.)
Available Options & Accessories
Replacement Cartridge
A Centry pump cartridge is a complete mag-drive pump less the outer magnet, pedestal and volute. A cartridge replacement is a convenient way to quickly replace a mag-drive pump that requires maintenance, ensuring maximum uptime.
Base Plate Mounting
Liquiflo Centry pumps are available with base-mounts to simplify installation. Liquiflo also offers base-mounts with or without the motor pre-installed.
S-Adapter
The S-Adapter is available for long-coupling mag-drive pumps; it isolates the pump from the motor and can be used when long-coupling pumps to motors or drives that do not have a C-face mounting. Maximum temperature rating is 250F (120C).
Power Frame
The Liquiflo power frame is used for long-coupling mag-drive pumps that are used for high temperature applications, up to the pump's maximum temperature rating. Its integral cooling jacket keeps the bearing system of the pedestal cool even when it is coupled to a pump operating at extremely high temperature.
Accessories & Spare Parts
Mechanical couplings, coupling guards, risers, base plates, adapters, brackets, pedestals and individual pump components can all be purchased separately.
