Grovhac.com

Selecting Equipment

Selecting the proper equipment for your application is essential for achieving optimal results. Please refer to the following recommendations when selecting equipment; keep in mind that the responsibility for determining suitability lies with the user.

Mixers & Agitators

When choosing a Grovhac mixer, first decide on the mounting style that best suits your application:

  1. Laboratory Mount / Hand Held
  2. Floor Stanchion Mount
  3. C-Clamp Mount
  4. Bridge Mount w/ C-Clamps (Horizontal, cross-the-tank)
  5. Tote Mount (Bridge Mount w/ Tote Clamps)
  6. Saddle Plate Mount
  7. Flange Mount
  8. Drive Unit for Drums w/ Built In Agitators
  9. 2” NPT Bung Mount
  10. Cover Mount

Next, determine the amount of horsepower needed to mix your material. The major considerations in horsepower selection are batch turnover time, viscosity of the liquid to be mixed, and the size of the batch. The table below may be used for basic selection in 90% of all mixing applications. Selections from this chart will provide liquid turnover times of approximately 1 to 2 minutes. For rapid agitation, use the next larger size mixer.


Some typical viscosities (at 70º F) are listed below for reference:

Water1 cps
SAE 10 Oil110 cps
SAE 40 Oil260 cps
Spar Varnish340 cps
SAE 60 Oil740 cps
SAE 70 Oil1060 cps
Tomato Catsup3000 cps

Finally, specify shaft length and number of mixing blades desired. The following illustrations show recommendations for mounting mixers and number of propellers required. For proper mixing action in tanks without baffles, mixer shafts should be mounted 10º to 20º off vertical and 10º to 20º off the tank center line, as shown in Illustrations A & B.


If the depth of the liquid (y) is approximately equal to the diameter of the tank (x), a single propeller may be used, as shown in Illustration C. Dual propellers are usually specified when the liquid depth (y) is 1.5 times (or greater) the diameter of the tank (x), as shown in Illustration D. The bottom propeller should be placed 1 to 2 propeller diameters from the bottom of the tank.


The above chart and information are to be used only as a guide; if you have any questions or concerns about mixer selection, please contact our customer service department.

Drum Pumps

The major considerations when choosing a drum pump are your chemical’s characteristics, pump material of construction, length of pump tube, and motor type desired.

First, gather any information you can regarding the your material’s chemical characteristics; this includes material viscosity, specific gravity, reactivity, and the chemical’s ability to ignite or combust. Your chemical’s viscosity and specific gravity characteristics will determine the pump series needed (ex. EP and PF series for low viscosities, TT and BT for medium viscosities, and HVDP for high viscosities).

Next, use the reactivity data to determine a suitable pump material of construction by accessing our /files/downloads/Drum Pump Chemical Resistance Chart.pdf. If a suitable material of construction is available, continue by determining the length of pump tube needed (27” for carboys, 40” for 55-gallon drums, 48” for totes, etc.).

Finally, determine the motor type desired. Grovhac drum pumps are offered with air, electric, or explosion-proof electric motors. Your motor choice will be dictated not only by performance desired (in terms of flow and discharge head), but also by your material’s flammability rating; use only air or explosion-proof electric motors for pumping flammables or combustables.

Centrifugal Pumps

To choose a Grovhac centrifugal pump for your application, start by gathering information regarding your material’s chemical characteristics; this includes material viscosity, specific gravity, reactivity, and the chemical’s ability to ignite or combust.

Next, use the reactivity data to determine a suitable pump material of construction by accessing our /files/downloads/Centrifugal Pump Chemical Resistance Chart.pdf. The pump material of construction will determine the pump series needed (ex. KC or GP for polypropylene or PVDF construction, AC for 316SS construction, and UC for ETFE lined ductile iron construction).

If a suitable material of construction is available, continue by determining your performance needs (in terms of flow and discharge head).

Again, the above information and related chemical resistance charts are to be used only as a guide for equipment selection; if at any point you have questions or concerns regarding equipment selection, please contact our customer service department.

Grovhac Model Number Key:

Example: 400-1000DE1D

Series - Horsepower Drive Unit Motor Options Phase Quantity of Props
400 - 250 - 1/4 HP D - Direct Drive E - Standard Electric 0 - Air Drive S - Single Prop
  333 - 1/3 HP G - Gear Drive A - Air 1 - Single Phase D - Dual Prop
  500 - 1/2 HP   X - X-Proof Electric 3 - Three Phase  
  750 - 3/4 HP   V - Variable Speed Electric    
  1000 - 1 HP        
  1500 - 1 1/2 HP        
  2000 - 2 HP        
  3000 - 3 HP