Not sure what type of pump you need?
Don't be afraid.
There are many factors when choosing a pump - pressure, flow, liquid properties, accuracy, shear and power requirements to name a few. Imo pump recently introduced one of the most complete pump specification sheets on the market. If you're not sure which pump type you need, start here and we'll work with you to choose the best product for your application.
Sean McCandless Industrial Market Manager Colfax Fluid Handling
When should I use a One, Two or Three Screw Pump?
I had previously posted a link to a white paper written by Rob Jordan in which he talks about some of the unique benefits and operating characteristics of 'screw pumps'. Hopefully you've had a chance to read this article and learn a little bit more about the products that we offer.
Today, I'd like to provide with readers a quick reference guide on when to use the products that Colfax Fluid Handling offers. This summary is referenced from the 2008 American National Standard for Rotary Pump types and Nomenclature, Hydraulic Institute. Note, a timed multiple screw pump is also known as a two screw pump and an untimed multiple screw pump is also known as a three screw pump.
| Progressing Cavity | Timed Multiple Screw Pump |
Untimed Multiple Screw Pump |
units | |
| Flow | 3750 | 12000 | 5300 | gpm |
| Pressure | 1500 | 1500 | 4500 | psi |
| Viscosity | 2.0 | 4.5 | 1.0 | Million SSU |
| Solids | 3.5 | 1/32 | Clear | in |
| Temp | 400 | 700 | 500 | °F |
| Self Prime Dry | Y | N | N | |
| Self Prime Wet | Y | Y | Y | |
| Dry Running | N | Y | N | |
| Reversible | Y | Y | Y (special) | |
| Abrasive Handling | Excellent | Good | Good | |
| Shear Sensitive | Excellent | Good | Good | |
| Pulseless | Excellent | Excellent | Excellent | |
| Horsepower Range | 0.1-200 | 5-2000 | 1-1000 | BHP |
As always, a thorough discussion with an application engineer is recommended if your application falls outside of these parameters.
There's a lot more to it then this and we're encouraging readers to contact us and discuss a lunch and learn session. What's better than a free lunch and a little education?
Sean McCandless Industrial Market Manager Colfax Fluid Handling