Roller Pump Selection Considerations
1. All Delavan Roller Pump Series
are available in Cast Iron and Stainless Steel Diamond Series.
Choose the pump body material to meet your application’s chemical
compatibility and durability requirements.
2. Determine application requirements
• Flow (GPM)
• Pressure (PSIG)
• Drive method (PTO, gas engine or electric motor)
• Package dimensions and plumbing
3. Refer to the individual product
specification pages to select the pump best suited to the application
and for complete performance and technical data.
How to Determine Pump Capacity for
Pump Capacity (GPM): Boom Requirement
(GPM) + Agitation Requirement (GPM)
Boom Requirement (GPM): Number
of nozzles x flow rate per nozzle (GPM at desired PSIG)
Agitation Requirement (GPM): 5% of
total tank volume if using liquids; 10% if using wettable powders
Example: A boom with extended
range 80-04 tips (0.40 GPM at 40 PSIG) and a 200 gallon tank with
Pump Capacity = (17 x 0.40) + (5% of 200)
Pump Capacity = 6.8 + 10.0
Pump Capacity = 16.8 GPM
- See individual product specification pages for
complete performance information.
- Please contact your Delavan Sales Agent or the
factory if you need assistance in sizing a roller pump to your
application. For high volume orders, customized units are available
– consult factory.
- Use the pump flow charts to select the appropriate
size roller pump based on your speed and pressure.
How a Roller Pump Works
- The pump shaft
is driven by a PTO, gas engine or electric motor
- A constant supply of fluid enters the inlet side of the pump
(Note: roller pumps cannot be operated dry!)
- As the shaft and rotor assembly turns, rollers push the fluid
through the pump housing to the outlet side of the pump
- The volume of flow is determined by several factors including:
PTO speed, operating pressure, size of the pump and the size and
number of rollers.