News Archive

Issue 1 January 2008
Slow your pump down to reduce maintenance costs? Yes, please!
The majority of Progressing Cavity pumps bought today are still designed with a conventional 1:2 ratio element profile. Change this to a 2:3 ratio, as Robbins & Myers Moyno Limited have done for their L-Frame, 1,000 and 2000 pump lines, and you could instantly slow down your pump by 1/3, whilst maintaining the current flow, extending service intervals and saving money!

Additional options available by choosing Ultra-Pro 23 elements from new or retrofitting are:-

	Obtain a flow rate equal to 150 – 175% greater, without changing the pump’s envelope dimensions.
	Increase pressure per stage by 15%, achievable by the steeper pitch angle and longer seal line throughout the pumps length. Between you and I, it’s not so much the extra pressure that customers benefit from, but the certainty that backflow or slip within the pump is eliminated.
	A second, or additional, pump stage is not required: benefits being smaller pump footprint and purchase price savings. This really does depend on the duty point!
	The pump is more efficient and the cost per gallon of fluid pumped is lowered

All sounds good to me so far, so what’s the catch? The 2:3 rotor profile requires a larger diameter stock material, combine this with greater machining and you find there is a premium for Ultra-Pro 23 elements. Worth paying? Yes - and No!

Yes, for all applications over and above light duties! But not for light duties. By light duties I mean pumps running only occasionally, whose operating pressures are below 2 Bar. For these, stick with what you have, or ask about our economy 800 line with the standard 1:2 ratio.

The Non-Intrusive Pressure Sensor.
Fit this product to any make of progressing cavity or positive displacement pump and eliminate pump damage.

Traditionally, and still today, temperature probes mounted in your PC pump’s casing are used to shut the pump down in, say, a dry run scenario. Sadly, the high temperatures involved normally meant at least some damage was already done!
I see the pressure sensor option as cure rather than mend; and, yes, please fit it to any make of pump - it’s not for exclusive use with Robbins & Myers Moyno Limited pumps only.

This is what the product info says:-

	An early warning device, to protect your pump against the harmful effects of dry-running and high pressure
	Non-intrusive, allows complete fluid flow without obstruction
	Easy retrofit. Fits between two standard flanges, providing complete fluid control
	Package includes sensor, pressure switch and control box

New team member
We would also like to welcome to the UK team, Mohammad Saquib, who joins us from Southampton University as an Honours Aerospace Engineer. Saquib’s focus was fluid technology and design of specialist fuel pumps. He brings a wealth of technical knowledge that will enhance our understanding of system characteristics and future product development.

If you would like more information, please do not hesitate to contact our team
T 023 8076000 or email rmsales@robn.com.

Very best regards,

David Johnson
Business Development Manager