Pumps and Pump Kits
We carry a full line of General Pumps, Comet Pumps, CAT Pumps and Replacement kits. Contact Us with any of your pump questions.
Click to Expand and shrink
Correct Pump Installation is essential for optimum performance.
It is recommended that the pump flow capacity be oversized for the actual flow required. For optimum running of the system the
water circulated through the regulating valve should not exceed 10 - 15% of the pump flow. Recirculating too much water can generate
heat in the supply tank increasing the cavitation risk.
Frequently Asked Questions
Question: How much should you reduce the pump RPM to achieve a lower flow capacity?
Answer:
| | Max R.P. M. allowed |
| Required R.P. M. = Expected capacity x | | 
Max allowed capacity
|
Question: What diameter of pulley must I use to achieve the correct pump RPM?
Answer:
| | | | R.P. M. pump |
| External diameter of the engine / motor pulley | = External diameter of the pump pulley | x | |
R.P.M. motor/engine
|
Question: What if I cannot change the engine / motor pulley?
Answer:
| | | | | R.P. M. motor |
| External diameter of the pump pulley | = | External diameter engine / motor pulley | x | |
Pump R.P.M
|
Question: If the engine / motor is running at a lower RPM than the maximum pump RPM allowed, what will
be the pump flow capacity?
Answer:
| | | | | Max. capacity indicated on the label |
| Attainable maximum capacity | = | Engine / Motor R.P.M. | x | |
Max R.P.M. indicated on the label
|
Question: What is the approximate power required to achieve the max. performances allowed?
Answer:
Required electric motor HP
| PSI x GPM | | | | | |
1460 | = | Electric Motor HP | | | |
Required gas engine
| PSI x GPM | | | | | |
1460 | x | 1.30 | | = | Gas Engine HP |
Conditions to prevent pump cavitation: Minimum difference in height HZ (pos/neg) between pump and water level.
The minimum inlet pressure value of the pump is limited by the cavitation phenomenon. Cavitation is the forming of vapor bubbles
when the local pressure is below the vapor pressure of the liquid. Bubbles flow together with the liquid and when they reach a higher
pressure area, they collide, generating abnormal stresses that are extremely dangerous to the pump components.
To avoid the risk of cavitation, it is necessary that the pump installation is correct.
You may also want to check out our Most Popular Pumps page for a short list of our most common pumps
