True Blue® Series GYW flow indicators are designed to indicate the presence or clarity of high purity or corrosive liquid in a piping system. For use with ultrapure liquids or chemicals compatible with acrylic. O-ring seals are used on Series GYW indicators allowing them to seal at extremely low pressures as well as high pressures. GYW flow indicators are full ported, eliminating any possible flow resistance. Pipe sizes are 1-1/2" through 8" NPT (40 mm through 200 mm). An optional fluttering device is available.
Ends on Series "GYW" indicators are Geon® PVC, Corzan® CPVC, PTFE, Kynar® PVDF and Natural Polypropylene. Standard O-ring seals are Viton®. Standard fasteners are stainless steel. The transparent outer cylinder wall is high impact strength acrylic. The inner wall (wetted) is Pyrex (CAUTION: cannot be used with hydrofluoric acid or sodium hydroxide which will etch the glass). Optional fluttering devices are corrosion resistant thermoplastic.
| Pipe Size/Inches | Pipe Size/Millimeters | Part # w/Polypropylene Ends |
|
1-1/2" 2" 3" 4" 6" 8" |
40 50 80 100 150 200 |
GYW150V-PP GYW200V-PP GYW300V-PP GYWX400V-PP GYWX600V-PP GYWX800V-PP |
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When properly installed, Plast-O-Matic flow indicators are automatic in operation and require little or no attention.
These flow indicators will easily show the flow of turbulent liquids without assistance from fluttering devices. With clear or opaque liquids that are not turbulent and do not contain entrained air bubbles, the flow may be difficult to see. In this case a Plast-O-Matic fluttering device within the cylinder will indicate movement of the liquid.
All Plast-O-Matic flow indicators are easily installed in a piping system. The flow indicators may be installed either vertically or horizontally; however, the level indicators can only be installed vertically.
The Series "GYW" (wafer design) flow indicators simply slip between two smooth faced companion flanges that may be either metal or plastic. Flange gaskets are not required as these flow indicators are supplied with two O-rings for just that purpose. Care should be taken so there is no misalignment of the flanges. Flange bolts should be tightened gradually alternating between opposite bolts to insure that the assembly pulls together evenly. The final 1/16" of tightening should be done with a torque wrench set between 10 and 15 foot pounds. This will seal the O-rings without placing uneven or excessive stresses on the assembly.
Although these flow indicators have no specific inlet or outlet, care should be exercised when installing such units that have streamers for fluttering devices. They must be installed in such a manner that the fluid flow will force the streamers into the indicator's viewing area.
Clearly, any flow or level indicator is only as good as the quality of its cylinder wall(s) since this is where the viewing takes place. The transparent cylinder walls used in PLAST-O-MATIC flow and level indicators are chosen for characteristics such as high corrosion resistance, high impact strength, and high light transmission.
The inner transparent cylinder walls used in the Series "GYW" are Pyrex, a borosilicate glass of very low alkali content that resists attack from most bases and acids with the exception of hydrofluoric acid and sodium hydroxide. This is the same material used in manufacturing glass pipe that is extensively used in the chemical, food, beverage and pharmaceutical industries.
The outer transparent cylinder walls are manufactured of a high impact strength acrylic. This material possesses uniform optical quality and has an extremely high light transmission factor, which is of great importance when the color or clarity of your liquid is a prime consideration. Acrylic cylinder walls are ultra-violet resistant.
All PLAST-O-MATIC flow indicators can be used to indicate the presence of liquid flow when the liquid lends itself to turbulence or has entrained air bubbles that make viewing effortless. When the liquid is either clear or opaque a mechanical device is required to identify liquid movement. In such applications the use of PLAST-O-MATIC optional fluttering devices is a necessity. Optional devices that flutter in the presence of flow are available for Series GYW flow indicators.
Please click here for web page specific to Series GX Single cylinder wall flow indicators
Please click here for web page specific to Series GY Double-Wall Sight Glasses
Please note that the above web pages are slightly more up-to-date than the .pdf files below, and the charts may print more clearly in the web pages. We suggest you try the above .html format, unless you need the convenience of "forwarding" .pdf files, etc. Thank you.
Please click here for PDF file specific to Series GX Single cylinder wall flow indicators
Please click here for PDF file specific to Series GY Double cylinder wall flow indicators
Please click here for PDF file specific to Series GYW Double-Wall, Wafer Style Sight Glasses
Geon® is a registered trademark of the Geon Co., Inc. Kynar® is a registered trademark of Elf-Atochem. Corzan® is a registered trademark of Noveon. Viton® is a registered trademark of DuPont Dow Elastomers. Pyrex® is a registered trademark of Corning Glass. True Blue and Plast-O-Matic are registered trademarks of Plast-O-Matic Valves, Inc.
The fine print: Plast-O-Matic founder Bruce L. DeLorenzo developed the first successful thermoplastic sight flow indicator in 1969. Each sight glass and level indicator is individually inspected and tested prior to shipment. As a result, not a single Plast-O-Matic sight glass has ever been returned to the factory due to a defect in workmanship.
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