PVC & CPVC Flowmeters for Corrosives & High Purity Flow Applications of 0.54 thru 500 GPM liquids, 3.20 thru 5000 SCFM gases

SPECIFICATIONS
ACCURACY: ±2% of 100% flow rating standard

REPEATABILITY: ±1/2% of indicated flow rate.

RANGEABILITY: 25 to 1 average.

MATERIALS: Brass or T-316 stainless steel for body and internals, except for Alnico magnet (electroless nickel plating or encapsulation of the magnet available as an option). Stainless internals, which tend to be more abrasion resistant, can be supplied in brass bodies for liquids that contain abrasive particles.

SCALES: Standard direct reading (GPM or LPM Liquid, Sp. Gr. = 1.00, or SCFM Dry Air @ 100 psig, 70°F.) or percent of flow. Scales are photo-etched, anodized aluminum. Special scales for other flow units or media conditions, or in other materials for corrosive environments, are available at extra cost.

PRESSURE RATING: Up to 300 psig, depending on meter type, temperature, and service conditions.

TEMPERATURE RATING: Up to 140°F. for PVC units and 210°F. for CPVC models depending on pressure and service conditions.

OPTIONS: Flanged, threaded, or socket weld connections in standard or special sizes, Flo-Sentry Alarms, Flow or Mass Courier Systems, panel mount kits, special or multiple scaling, & safety devices available. Custom options such as viscosity calibrations are by quotation only.

SPECIAL RECOMMENDATIONS FOR MEMFlo PVC & CPVC FLOWMETERS & PLASTIC PIPING SYSTEMS

• Do not install threaded metal pipe into plastic flowmeters, as it is likely to cause the body to leak or crack over time.
• If solvent cementing is being done in the vicinity of a MEMFlo flowmeter with a Polysulfone sight tube, the sight tube should be removed from the meter and stored away from the cement fumes.
• Plastic flowmeters should not be exposed to direct sunlight. Heat buildup can cause PVC units to weaken and even distort, and ultraviolet radiation may also have an adverse effect. Plastic meters installed outdoors should be shaded.
• PVC and CPVC are not recommended for compressed air lines or gas service at high pressures. If the pressure is 15 psig or less, either plastic is considered acceptable for air service.

SIGHT TUBE OPTIONS
PVC: Transparent, molded PVC sight tube with same chemical resistance as standard Type 1, Grade 1 PVC.

Resistant to many acids, alkalis, salt solutions, and other corrosives. Attacked by nonpolar solvents including some chlorinated hydrocarbons, and aromatics. Maximum temperature 140°F.

CPVC (uses magnetic indication): These molded tubes are CPVC Type 4, Grade 1, and have physical properties similar to PVC at room temperature. The chemical resistance of CPVC is generally superior to PVC. CPVC has a maximum service temperature of 210°F., making it an excellent material for fluids at temperatures beyond the capability of PVC.

POLYSULFONE: Only offered on CPVC flowmeters for compatible fluids that are transparent or translucent. Highly resistant to many aqueous mineral acids, alkali, and salt solutions; good resistance to detergents and hydrocarbon oils. Temperatures to 300°F. (well above the limit of CPVC). Attacked by nonpolar organic solvents such as ketones, halogenated hydrocarbons, and aromatic hydrocarbons.

BOROSILICATE GLASS: Satisfactory for most acids, hot solutions (to 240°F.) below pH-12, and strong alkalis (to 20%) up to 100°F. Not recommended for water above 200°F., steam, fluorine, or hydrofluoric acid. Temperatures to 400°F. acceptable with non-attacking fluids. Glass sight tubes are permanently bonded in a PVC or CPVC (to match meter material) sleeve for mounting to the meter body. An optional Safety Guard Tube that attaches to the sleeve is strongly recommended.

DIRTY FLUIDS

Unlike tapered tube rotameters, MEMFlo PVC and CPVC Flowmeters have a sharp-edged float indicator disk that is always within a few thousandths of an inch of the cylindrical sight tube wall. Because of this near proximity, the edge of the disk remains visible regardless of flow rate even in many dirty fluids.

As a rule, the indicator disk should be visible in most thinner oils and light colored liquids. Visibility in black, viscous liquids is unlikely, and the magnetic indication option should be ordered for these cases.