March 28, 2005
Two patents added to mass flowmeter

Two patents added to mass flowmeter

Two additional patents have been received for the core technology of the Foxboro CFT50 digital Coriolis mass flowmeter.

The new patent numbers apply to the flowmeter and its ability to correct for two-phase flow. These techniques relate to the CFT50’s ability accurately to measure traditionally difficult-to-handle materials and gas-liquid (two-phase) flow.

The new patents relate to new signal processing techniques used to provide measurements of mass flow and density and the operational aspects of keeping the Coriolis meter running stably in single-phase or two-phase flow conditions (and dynamic transitions between these flow conditions).

One patent includes an advanced control and measurement system with high-speed digital signal processing that responds to changing flow conditions faster than standard Coriolis flowmeters, the firm says. The other patent relates to detecting and compensating for two-phase flow conditions and generating a validated mass flow measurement.
Invensys Systems Inc., 33 Commercial St., Foxboro, MA 02035.

Free progressing cavity pump bulletin

A new Moyno downhole pump bulletin, yours free for the asking, features progressing cavity units designed for crude oil extraction and gas well dewatering.

The 8-page, full color brochure includes pump features, specifications, performance characteristics and applications as well as detailed product and application photographs.
Source: R&M Energy Systems, 10586 US Highway 75 North, Willis, TX 77378.

New control valve handles urea production

A newly launched control valve is custom built specifically to tolerate high pressure drops and crystallization associated with the letdown process in urea production.

Typical urea production conditions include an inlet pressure of 3,500 psig, an outlet pressure of 300 psig, an operating temperature of 350° F., and a flow rate of 8 million scfh. A valve typically used in this process would be a 4 in. ANSI Class 2500.

To combat the challenge of high pressure drops during letdown, the new valve features a design with double top-stem guiding, single-point throttling, a single-piece plug, and a clean and streamlined exit. The company says this design minimizes vibration, noise, sticking, and plugging common to valves not specifically designed to work in urea letdown.

Constructed of urea grade 316 stainless steels, the valve features a specially shaped venturi seat ring, sweep angle design, advanced velocity control, straight-shot exit, and a large, oversized gallery.
Source: Flowserve Corp., 5215 N. O’Conor Blvd., Suite 2300, Irving, TX 75039.