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Guide to Gear Pumps
An Introduction to Gear Pumps

Gear Pump Basics (pdf)

Metering with Gear Pumps (pdf)


Questions?
Contact us for your application needs

Special Requirements?
Liquiflo can custom engineer pumps to meet the specific requirements of your application

 

 

 

 

 

 

 

 

 
 
Liquiflo's 4-Series pumps are low-flow magnetically-driven gear pumps. The 4-Series housings are manufactured from Bar Stock in 316 Stainless Steel, Alloy-C or Titanium. With several material options for shafts, gears, wear plates and bearings, these pumps can be used in a wide variety of chemical processing applications.
 
 
 
Models 41, 43, 44 & 45 - Mag-Drive, Close-Coupled

 

4-Series Specifications Click any Model # below to access page for that
individual model:
 
  4-SERIES MODEL   41 43 45  
  Port Connections:
  Threaded - NPT
  Threaded - BSPT


in
in
1/4
3/8
1/4
3/8
3/8
3/8
3/8
3/8		  
 
Max Flow Rate
GPM
 0.5 1.4 2.4 3.4  
  Max Differential Pressure
PSI
 100 100 100 100  
 
Max Discharge Pressure
PSIG
 300 300 300 300  
  Max Temperature
°F
 500 500 500 500  
 
Min Temperature
°F
 -40 -40 -40 -40  
  Max Speed
RPM
 1750 1750 1750 1750  
 
NPSHR @ Max Speed
ft (a)
 4.5 3 3 2  
  Weight (without motor)
  Mag, Close-Coupled

lbs
11


11
13
13		  

  NPSHR = Net Positive Suction Head Required
 
 
 
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 Liquiflo gear pumps are available with magnetic drive.
 
 
 
Available Options & Accessories  
 
Repair Kits
Repair Kits simplify inventory and speed repair. All parts can also be purchased separately.		 Relief Valves
Positive displacement pumps should be installed with a relief valve in the discharge line to protect the pump and piping against any type of line blockage including the inadvertent closing of an isolation valve. Liquiflo manufactures two sizes of relief valves in both 316 SS and Alloy-C.
Base Plate Mounting
4-Series pumps can be base-mounted when close-coupled to a motor. 		Hard-Coated Shafts
Hard-coated shafts are used to extend pump life in difficult applications requiring higher levels of wear resistance. Ceramic Chrome Oxide (CO), Tungsten Carbide (TC) and Titanium Oxide (TO) coatings are available.
 

 

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