FLOWMETERS - Differential pressure

TORBAR Averaging Pitot Tube

The ABB TORBAR is a multiport self-averaging flow meter with a design based on the classical pitot tube concept of fluid flow measurement. Since its design and launch in 1985, thousands of TORBAR flowmeters have been installed into a wide variety of industries world wide.

TORBAR is suitable for gases, liquids and steam. Some of the many typical applications include water, natural gas, flue gas, nitrogen, combustion gases, ventilation air, sea water, cooling water, crude oil, saturated and superheated steam. Possible pipe sizes range from 15 mm (½ in.) up to 8 metres.

Wyatt Lo-Loss® Flow Tubes - PMT

The cast iron Wyatt Lo-Loss® meter is a differential-producing flow tube that maintains its accuracy over a wide range of flow rates. The hydraulic shape of the PMT Lo-Loss® meter incurs a lower permanent pressure loss than any other differential producing flow device. The PMT can be provided with either 125 or 250 PSIG flanges.

Application
The cast iron PMT series of Lo-Loss® meters is designed to accurately and reliably measure the flow rates of water, wastewater, sludge, slurries, clean fluids, and gases in full pipe conditions. The PMT series of meters is ideally suited to applications where permanent pressure loss must be kept to a minimum, such as in gravity-fed systems, or where a savings due to lower pumping costs can be realized. The Model PMT-C is designed for rate-of-flow control applications, while the PMT-S incorporates a rugged design for cleaning the pressure taps for solid-bearing fluids.

Wyatt Lo-Loss® Flow Tubes - PMT-IF

The Wyatt Lo-Loss® PMT-IF is a fabricated insert venturi flow element that offers repeatability and accuracy over a wide range of flow rates and has lower permanent pressure loss than orifice plates, flow nozzles, and any other venturi or flow tube on the market. The PMT-IF can be manufactured from virtually any material. It is designed for insertion within the interior of a pipeline and is secured by the adjacent pipe flanges. This unique design is characterized by longevity of service and flexibility in install-ation and application.

Application
The fabricated insert PMT-IF is designed to measure the flow of gases and liquids with low solids content. It can operate over extreme temperature and/or pressure ranges, and with highly corrosive fluids or gases. The Lo-Loss® fabricated insert has the distinct advantages of minimal weight, cost, and laying length. Typical applications include potable water, cooling water, process fluids, steam, air flow for aeration, and gas flow for combustion applications.

Wyatt Lo-Loss® Flow Tubes - PMT-IP

The Wyatt Lo-Loss® insert series of differential producers is designed for installation within a pipe, and is secured in place by the adjacent pipe flanges. Lo-Loss® insert venturi meters are available in two configurations: PMT-IP and PMT-IL. The standard PMT-IP is made entirely of engineered materials such as FRP, PVC, and other thermo-plastic compounds. The PMT-IL em-ploys similar construction, but offers a metallic throat section and mounting flange. Their permanent pressure loss, expressed as a percent of differ-ential pressure, is lower than any other venturi or flow tube on the market.

Application
The PMT-IP and PMT-IL Lo-Loss® Meters can accommodate a wide range of flow rates, line fluids, and process conditions. They are designed to measure full-pipe, clean fluids and gases in virtually any pipe size. In applications where solids contaminate the line fluid, an auxiliary high pressure tap can be provided for installation in the upstream pipe. The Lo-Loss® insert meters have the advantages of minimal weight, low cost, and a short laying length.

Wyatt Lo-Loss® Flow Tubes - PMT-U

Wyatt fabricated PMT Lo-Loss® meters are differential producers that maintain their accuracy over a wide range of flow rates, and incur lower permanent pressure loss than any other differential producing flow device. These units can be made from virtually any material to address the different requirements of your applications. Lo-Loss® flow tubes are characterized by longevity of service and flexibility in design.

Application
The fabricated series of Lo-Loss® meters are often used in industrial applications where the flow stream demands intelligent decisions regarding materials of construction. This is due to extremes of pressure, temperature, or the aggressive nature of the fluid being metered.

Wyatt Flow Nozzel - FNP

Flow nozzles are often used in flow measurement due to their reliable performance and tolerance to extremes in process and environmental conditions. They offer advantages over orifice plates in that they require less upstream piping and incur lower permanent pressure loss. Accuracy can be sustained indefinitely since there are no sharp edges to wear.Wyatt Engineering flow nozzles are used in various industries, particularly for steam flow in the power sector. Due to their long documented history, flow nozzle designs and installation requirements are known and recognized by national and international standards organizations.

Application
Wyatt Engineering flow nozzles and metering runs are used in a variety of applications where extremes of pressure, temperature, or the aggressive nature of the fluid being metered render other metering technologies unfeasible. Because of their long-term reliability and ease of installation, Wyatt nozzle products are commonly used as the differential pressure device for the measurement of the flow of fluids, especially for water, steam, air, and gases.

Common installations include:

Power Plants
Refineries
Petrochemical Plants
Chemical Processing Facilities
Steam and Condensate Flows