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AB-Series Documentation
AB General Description (pdf)
 
Material Codes (pdf)
 
Mag Coupling Torque Ratings (pdf)
 
TTZ Shell Properties (pdf)
 
Gas Panel (pdf)
 
Gas Panel Options (pdf)
 
Motor Pressure Switch (pdf)
 

 

 

 

 

Liquiflo's ENDURA® AB-Series is our Patented Air-Barrier Centrifugal Pump. This innovative revolutionary design was the recipient of the 1995 Vaaler Award. The ENDURA® AB can run dry indefinitely and handles solids - something no other pump in the industry can do.

The AB (air-barrier) combines the best features of a standard sealed pump with that of a mag-drive pump, while eliminating the drawbacks commonly associated with these designs. This patented design makes the ENDURA® AB unlike any other pump in the industry.

How It Works
A gas seal isolates the process fluid from the bearings within a mag-drive pump. The benefit of this design is that the ENDURA® AB does not rely on the pumpage for lubrication. This allows the use of standard, greased-for-life ball bearings, instead of the common sleeve bearings found in all other magnetically driven pumps.

Great Features of the Endura Air-Barrier® Pump:

  • Can run dry indefinitely
  • Lowest L3/D4 ratio of any pump - 9.3
  • Solids handling up to 40%
  • Close-coupled or Power Frame
  • ANSI dimensional for easy change-out
  • Greased-for-life antifriction ball bearings
  • Gas seal prevents process fluid from contacting bearings
  • Inherent secondary containment
  • Magnetically driven - NdFeB or SmCo high-strength magnetic couplings
  • Transformation Toughened Zirconia (TTZ) ceramic containment can eliminates eddy current losses

 

Endura Air-Barrier:  Winner of the 1995 Vaaler Award

 

 
Endura AB-Series Specifications Click any Model # below to access page for that
individual model:
 
  AB-Series Model/Size (in.) *    
  ANSI Group  
I
I
I
II
 
 
Max Flow Rate
GPM
175
360
180
375
 
  Max Total Head
ft

185

170
325
300
 
 
Max Discharge Pressure
PSIG
275
275
275
275
 
  Max Speed
RPM
3550
3550
3550
3550
 
 
NPSHR @ Max Speed & BEP
ft
7
11
13
22
 
  Max Temperature
°F
350
350
350
350
 
 
Min Temperature
°F
-60
-60
-60
-60
 
  Weight (without motor)
 Mag-Drive, Close-coupled
lbs
84
92
100
260
 
   
* Suction Port Size x Discharge Port Size x Impeller Diameter
BEP = Best Efficiency Point
   
 
 
 
Available Materials Of Construction  
 
 
 
Available Sealing Configurations  
Thumbnail image 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 Endura centrifugal pumps are available with magnetic drive.
 
 
 
Available Options & Accessories  
 
Replacement Module
The Endura Module is a complete wet-end mag-drive pump assembly less the volute. A module replacement is recommended when a quick turn-around is essential for plant operation.
Base Plate Mounting
Liquiflo Endura pumps are available with base-mounts to simplify installation. Liquiflo also offers base-mounts with or without the motor pre-installed.
Power Frame
The Endura pumps can be long-coupled to the motor using the Power Frame option.
Gas Regulating Panel
The Liquiflo Gas Panel is used to provide a metered and regulated flow of inert gas from the supply source to the gas seal of the AB pump. The main components of the panel are a low-pressure regulator and filter unit (left), a flow meter (center) and optional pressure-activated motor switch (right).
Accessories & Spare Parts
Mechanical couplings, coupling guards, risers, base plates, adapters, brackets, impellers and all other individual pump components can be purchased separately.

 

 
 

 

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