Low Flow Rotameters & Purge Meters
Designed for low flow rates, the Model P flow meter is a precision instrument embodying the inherent simplicity, versatility and economy of the classical rotameter. It is particularly suitable for metering carrier gases in chromatography, indicating and controlling gases in manufacturing processes, liquid and gas measurement in laboratories, pilot plants, flow and level indicating, etc.
Shipped completely assembled, flow meters include standard mounting fittings in a choice of materials, side plates, thick protective magnifying front shield and back plate, optional built-in control valve, and flow tubes selected from the Flow Capacities tables Panel mounting style is convertible to bench mounting through the use of the optional acrylic tripod The tripod has a built-in spirit leveler and leveling screws.
design features
- Rib-guided or fluted metering tubes facilitate stable, accurate readings.
- Magnifier lens in front shield to enhance reading resolution.
- Interchangeability of flow tubes and floats.
- Ease of installation and exchange of flow tubes.
- "Non-rotating" adapter feature - glass flow tubes are prevented from turning during the tightening phase of the assembly procedure.
- OPTIGRAD scales minimize parallax and eye fatigue.
- Chemical compatibility.
- Simple means of panel mounting.
Built-in Valves
Meters are available with built-in needle valves (CVTM), high precision metering valves (MFVTM) with "non-rising stems", or with no valves. The higher cost of MFVTM valves is justified whenever high sensitivity control and resolution are desirable particularly in conjunction with metering tubes of very low flow rates. Generally, for gas metering it is recommended that valves are positioned at inlets (bottom) for liquids valves may be positioned either at inlets or outlets (top). For vacuum services, valves must be mounted at outlets. If unspecified at the time of ordering, meters will be shipped with valves mounted at the inlets.
