Phased Out - Limited Availability
Wallace & Tiernan® low flow variable area flow meters extend the useful range of the rotameter to the measurement of very low flows. They feature a rigid steel frame, positive tube seating and a variety of materials of construction and optional accessories. They combine compactness and accuracy for low flow applications in research and industry.

For higher capacities, see the Glass Tube Varea-Meter® Units. For high temperature, high pressure, or hazardous fluid metering, see the Metal-tube Varea-Meter® Units or  the TFE-lined and PVC-tube Varea-Meter® Units.

 Features:

Structurally Strong Frame
The side frames are heavy, channel-form stainless steel sections welded to stainless end fittings turned from bar stock. This produces a rigid unit which resists pipe strains and protects tube alignment.

Choice of Corrosion-Resistant Materials
The frame is made of 302 stainless steel; the end fittings, 316 stainless. The metering-tube retainer is Kynar® vinylidene fluoride resin with 316 stainless optional. O-rings come in a choice of Buna N or Viton® with EPR (ethylene propylene rubber) and Kalrez® optional. Valve trim (seat and stem) is 316 stainless.

Positive Tube Lock and A Tube Shield
A knurled tube-locking nut, external to the flow, positions the tube retainer and locks the tube firmly in place. Tube removal is quick and easy. O-rings seal the tube at both ends. A clear plastic shield covers the tube. It has tabs which snap into slots in the frame.

Versatile Flow Controller
 A Wallace & Tiernan® Flow Controller keeps flow constant regardless of pressure variations. It comes in brass or 316 stainless steel, in inlet or outlet configurations and high or low capacities. Replaceable seat adapters make for easy capacity changes. Straight through design means the controller can be threaded directly into the meter body, eliminating pipe nipples Low Flow Meter Flow Measurement and static piping.