There are many different types of sanitary pumps used in the pharmaceutical and food industries.  Some of these types include centrifugal, Rotary Lobe, Double Diaphragm, Peristaltic and Piston type pumps.

Holland Applied Technologies sells each of the different types of pumps above for a myriad of applications.   We sell many sanitary pumps into industrial applications as well because most industrial pumps are not easily cleaned after use.  For instance, one customer processes different colors of paint pigment.  They use a sanitary pump to allow them to clean between each color.  It allows them to clean without having to remove the pump from the line and disassembling it.

Below are the main types of sanitary pumps that Holland Applied Technologies sells.
Centrifugal Pumps :

Waukesha S200 Santary Centrifugal Pump

• Good for low viscosity liquids.  Run usually between 1750RPM and 3500RPM in speed.  Do not require a pressure relief device.
• Flow rate up to 750GPM
• Capable of pressures up to approx 150 psi.  Lower initial cost and lower maintenance costs than a positive displacement pump.

Rotary Lobe Pumps:

Waukesha Universal 2 Positive Rotary Pump

• Good for low to high viscosity products.
• Run usually between 25-500RPM in speed.  Capable of approx 10 psi to 350psi discharge pressure.
•  May require a pressure relief device.
• Liquid is displaced at a given amount per revolution based upon the size of the pump.
• Medium to higher initial cost and maintenance costs because of tight tolerances in the pump.

Double Diaphragm Pumps:  

• Good for low to high viscosity products.
• Air driven (No electric motor required), positive displacement pump.
•  Does not usually require a pressure relief device since it will “stall” against the incoming air pressure.
• Capable of  approx 10 psi to 90 psi discharge pressure
•  Consist of two large diaphragms driven by air pressure that work in unison with a ball check system  to create suction and discharge pressure.

Peristaltic Pumps:

• Good for low to medium viscosity products.
• Good for lower volumes.
• Run usually at 0-600 RPM in speed.   Can be air or electric driven.
• Capable of approx 2psi to 60 psi discharge pressure.
• Consists of a pump with rollers turning and squeezing against a flexible tube located internally through the pump.  The pump has no wetted parts only the tubing is in contact with the product.

Piston Pumps :

• Good for low to high viscosity products.
• Good for lower volumes.
• Air driven (no electric motor required)  Positive displacement pump.
• Capable of 5 psi to 300psi discharge pressure.
• May require a pressure relief valve.
• Consists of a piston that works in unison with a ball check system to create suction and discharge pressure.

Look for future HAT blogs to learn more in detail about each type of sanitary pump above.