Our flow measurement equipment has earned a considerable reputation as reliable and accurate performers, especially in terms of easy-to-read units of measurement, alarms, transmission and control of fluid through rates.

Wallace & Tiernan provide an integrated line of flowmeters and accessories that are extremely durable even in the toughest of applications.

Designed to meet almost every customer need.


Glass-Tube Meters

Stainless Steel Glass-Tube Purge Meter
These glass-tube meters have a rugged stainless steel frame, available in 1 1/2-inch and 3-inch scale lengths using a high-stability float for accurate, repeatable performance. Meters can be supplied with flow controllers and plastic bezels for flush mounting (not available with 1 1/2-inch scale purgemeter.)



Glass-Tube Meters

Aluminium-Frame Purge Meter
These glass-tube meters have a rugged, single-piece, rectangular, aluminium frame available in 3-inch(75mm) scale lengths. This design provides strength, rigidity, resistance to pipe strain, and excellent adaptation to panel mounting. End fittings feature 1/8-inch horizontal inlet and outlet connection and are available in Kynar ® , 316 stainless or aluminium. Meters with aluminium and stainless end fittings can be ordered with flow controllers.


Glass-Tube Meters

Stainless Steel Glass-Tube Purge Meter
These glass-tube meters have a rugged stainless steel frame, available in 1 1/2-inch and 3-inch scale lengths using a high-stability float for accurate, repeatable performance. Meters can be supplied with flow controllers and plastic bezels for flush mounting (not available with 1 1/2-inch scale purgemeter.)



Glass-Tube Meters

Glass-Tube Varea-Meter®
These rotameters have a wide range of capacities and tube sizes. Metering accuracy is 2% of full scale (1% with custom calibration) over a 10:1 range. Beaded-guide tubes are available with 5- or 10-inch scales. End fittings for vertical and horizontal connections come in both threaded and flanged types. Choice of such wetted parts materials as brass, carbon steel, 316 stainless, PVC, TFE, Kynar ® , Buna-N, Viton ® , and EPR give a good balance between cost and maximum corrosion resistance.


Glass-Tube Meters

Direct-View Flow Meter
This is an inexpensive, 5% accuracy flowmeter for liquids or gases. It gives accurate and repeatable indication; an optional flow switch gives reliable high and/or low flow rate switching. Meter sizes are 1/2, 1, 1-1/2, and 2 inches with capacities to 130 gpm water and 150 scfm air @ STP. Operating range is 10:1. Scales are 2 to 4 inches long and calibrated in gpm and percent for liquids, percent for gases, or special calibrations. Scales are fused on the tubes or detached and engraved on aluminium. The cast aluminium frame offers 316 stainless or brass end fittings. Front and rear tube shields of strong, clear polycarbonate are standard. All other wetted parts are: borosilicate glass; Buna-N, Viton® or EPR O-rings; stainless steel, brass, beryllium copper or polypropylene float materials.



Glass-Tube Meters

Glass-Tube Bypass Varea-Meter
For indication, a 1/2-inch Glass Tube Varea-Meter is available with 5 or 10-inch scales, threaded or flanged horizontal connections, and in a variety of materials. For indication and an alarm extension, a 3/4 inch meter is available with 5-inch scale, a 1-inch threaded-flange inlet and a 3/4-inch threaded outlet..


Armoured-Tube Meters

Armoured Purge Meter
This armoured purge meter operates over a 10:1 range. Scales are 1 1/4 inches long. The 1/2-inch meter has a gph or scfh scale; the 3/4-inch meter, a gpm or scfm scale. Each has a percent scale also. Construction with such materials as nickel-plated carbon or 316 stainless steel with Buna-N, TFE, and 321 stainless trim give maximum corrosion resistance.



Armoured-Tube Meters

Arma-View® Purge Meter
The ARMA-VIEW ® Low Flow Purge Meter's design provides easy visual readout on a 170-degree-arc dial with broadly-spaced, clearly-defined graduations. Dial calibrated in percent or gph for water, percent for air. Special calibrations are available. Operating range is 10:1. Meter body and all wetted parts (except O-rings) are 316 stainless steel. O-rings choices are Viton ® Buna-N or EPR.


Armoured-Tube Meters

Armoured Flow Meter
This inexpensive, 5% accuracy flowmeter gives reliable flow indication of aggressive fluids at high temperatures and pressures. Available options include a 4 - 20 mA output flow signal and high/low alarm switch. Meter sizes (pipe connections) are 1/2, 1, 1-1/2, and 2 inches with capacities to 130 gpm water and 150 scfm air at STP. Operating range is 10:1. Mounting is vertical in the line with NPT female connections. The magnetically coupled indicating unit has a 6-inch scale calibrated 0 to 100%. A reversible scale with gpm water on one side and percent of maximum flow on the other is standard. Special scale calibrations are optional. All wetted parts are stainless steel (except polypropylene float in gas service); Buna-N, Viton or EPR O-rings. The float has an encapsulated alnico magnet.e.



Armoured-Tube Meters

Metal-Tube Varea-Meter
Available in a variety of tube sizes (1/2, 3/4, 1, 1-1/2 and 2 inches) and flange facings and ratings, these metal-tube rotameters give reliable flow measurement over a 10:1 range for aggressive fluids at high temperatures and pressures. (See page 2 for pressure and temperature limits.) Metering accuracy is 2% of full scale (1% with custom calibration). Available options include a 4-20 mA output flow signal and high/low alarm switch. Flanges available have ANSI 150-, 300-, and 600- lb. ratings. Flanges are raised, flat, large female, tongue-and groove, or ring-joint face. The standard tube-and-float material is 316 stainless steel. A Hastelloy C float is also available. The magnetic indicator has a 6-inch scale. Percent of maximum flow is the standard calibration; gpm water, scfm air, or special graduations are optional.


Armoured-Tube Meters

Armoured Flow Meter
This inexpensive, 5% accuracy flowmeter gives reliable flow indication of aggressive fluids at high temperatures and pressures. Available options include a 4 - 20 mA output flow signal and high/low alarm switch. Meter sizes (pipe connections) are 1/2, 1, 1-1/2, and 2 inches with capacities to 130 gpm water and 150 scfm air at STP. Operating range is 10:1. Mounting is vertical in the line with NPT female connections. The magnetically coupled indicating unit has a 6-inch scale calibrated 0 to 100%. A reversible scale with gpm water on one side and percent of maximum flow on the other is standard. Special scale calibrations are optional. All wetted parts are stainless steel (except polypropylene float in gas service); Buna-N, Viton or EPR O-rings. The float has an encapsulated alnico magnet.



Special Flowmeter Applications

Kynar-Frame Glass-Tube Purge Meter
These glass-tube purgemeters have a one-piece molded Kynar ® frame and end fittings for long life in highly corrosive atmospheres. An optional Kynar flow control valve is available. Scales are 3 inches long.


Special Flowmeter Applications

TFE Varea-Meter
This flow meter is designed to give long service with such chemicals as nitric or sulfuric acid, boiling caustic, or wet chlorine gas at high temperatures and/or pressures. Mounting is vertical with 150-lb. flanges and TFE flange gaskets Flow rate indicator, transmitter, and flow switch are the same as for the PVC-tube Meter.



Special Flowmeter Applications

PVC Varea-Meter
For moderate temperature and pres-sure applications - the PVC-tube Varea-Meter provides excellent service at a low initial cost. It mounts vertically in the line and mates with 150-lb ANSI flat-face flanges. The flow rate indicator has a 6-inch percent scale; its mechanism is protected by a gasketed aluminium housing (NEMA 4); gpm, scfm, and other calibrations optional.


Flowmeter Accessories

4-20 mA Electronic Transmitter
This electronic transmitter is a low energy, high-output-load device that gives local analog flow read out on a six-inch scale as well as a linear 4-20 mA signal proportional to the flow rate. For stand-by operation, the transmitter can easily be connected to operate from a battery option. The transmitter is housed in a NEMA 4 enclosure with a plastic window; a glass window is also available as an accessory. In NEMA 4 general purpose enclosure the transmitter is Factory Mutual approved as intrinsically safe for Class I, Division I, Group A, B, C, and D hazardous locations and dust-ignition proof for Class II, Division I and II, Group E, F and G areas. There is also an FM approved explosion-proof arrangement available for Class I locations and dust ignition proof for Class II areas.



Flowmeter Accessories

5700 and 5800 Flow Controllers
These controllers are designed to maintain a constant set flow within a system, regardless of variations in the line pressure. The 5800 series is used with Wallace & Tiernan purge meters. The 4700 series is used with meters with up to 3/4-inch pipe size.


Flowmeter Accessories

Integral Flow Alarm
For use with any meter with a Wallace & Tiernan indicator. This low-cost alarm allows remote monitoring of either high or low setpoints. Both NEMA 4 and FM-approved versions are available for intrinsically safe applications.


Flowmeter Accessories

5600 and 5500 Flow Switches
These compact switches offers reliable high- and/or low-flow switching. Even under sudden flow surges, switching remains reliable. Available in hazardous (5500 series) and general purpose (5600 series) versions.