Choices & Options

Styles

Indicator styles are designed to accommodate the various flow directions common to processing systems.

• Plain Style: For any flow direction
• Flapper Style: For horizontal or upward verticle flow
• Rotary Style: For any flow direction
• Drip Style: For downward verticle flow
• Flutter Style: for low volume flow
• Tube Style: For low pressure vertical or horizontal flow

Also, specific indicator styles are preferred relative to solution transparency, thickness or other system characteristics.

Pressures

Jacoby-Tarbox Sight Flow Indicators are manufactured for low, medium and high pressure applications. Standard models with maximum pressure ratings ranging from full vacuum to 3000 PSIG are available. Depending on the style and model, indicators carry either a "Full ASME Rated" or a "Nominal Pressure Rated" designation. Models are categorized as follows:

• Low Pressure: Threaded, Nominal Pressure Rated
• Low Pressure: Flanged, Nominal Pressure Rated
• Medium Pressure: Threaded, Nominal Pressure Rated
• Medium Pressure: Threaded, Full ASME Rated
• Medium Pressure: Flanged, Nominal Pressure Rated
• Medium Pressure: Flanged, Full ASME Rated
• High Pressure: Threaded, Nominal Pressure Rated
• High Pressure: Flanged, Nominal Pressure Rated
• High Pressure: Flanged, Full ASME Rated

Body Materials

To meet specific performance requirements, indicators can be manufactured from 316 and 304 Stainless Steel, Alloy 20, Hastelloy, Inconel, Monel, Carbon Steel, Bronze, Cast Iron and PVC. Not all styles and models are available in all materials.

Linings

Selected indicators models, all with flanged connections, are available with a choice of corrosion-resistant linings including TFE (Teflon), PFA and rubber. In certain applications, these linings provide cost savings over indicators manufactured from high performance body materials.

Windows

All Jacoby-Tarbox Sight Flow Indicators are fitted with windows of borosilicate glass as standard. However, the far superior performance of UniGlas® is available on all models and is highly recommended. UniGlas windows are considered to be the safest, strongest sight windows presently in use.

UniGlas is glass fused t metal, resulting in extraordinary resistance to impact, scratching or pitting. When intentionally cracked at rated pressure, only slight weepage resulted with no window blowout or window failure.

UniGlas, capable of handling most high pressure system temperatures from -435°F to 600°F, employs no glass bonding agents and requires no shims, packings, or adjusting screws for installation.

UniGlas Sight Windows are two-piece, ASME rated units, each with a UniGlas disc insert plus a separate retaining flange.

Dual Glass Windows - For maximized safety, many Jacoby-Tarbox Sight Flow Indicators can be specified with a Factory Mutual approved Dual Window option. As the name implies, each side of the indicator employs two windows of either borosilicate of UniGlas construction.

The Dual Window is recommended for systems carrying highly hazardous fluids or wherever extra precaution is advisable, such as in heavy traffic areas.

Gasketing

Jacoby-Tarbox Sight Flow Indicators employ neoprene as the standard gasket material. Other gasketing is available for compatibility with special fluids or operating/system characteristics. Choices include TFE (Teflon) with Neoprene or Garlock 5500 Insert, Garlock, 5500, Butyl, Buna-N, Siilcone, Viton, Graphite, and Gylon brank gaskets.

Shields

Alkalis, phosphoric & hydrofluoric, steam, and other components are corrosive to borosilicate and silica quartz windows. To protect and extend th life of the window from corrosive attack, several different styles of window shields are available, depending on the media, pressure, and temperature requirements. Kel-F, Mica, and PFA shields are the most common methods to protect the integrity of the window under harsh conditions.

UniShield - For protection for maximum durability under thermal cycling and vacuum applications that cause premature failure of loose shields is now available from Jacoby-Tarbox. Consisting of a clear fused Teflon PFA fluoro-polymer impervious to most media, UniShield is a new technology available for sight flow indicators and windows.

Accessories

LED Tank Light Shines - Jacoby-Tarbox introduces the next-generation of Tank Illuminators. The Phaeton Series Tank Lights use the newest LED lighting technology to produce a bright, clean light for easy and safe viewing into any process vessel or storage tank. The Phaeton Series Lights require less than one amp of power consumption and are rated for over 8 years of continuous operation - which can be extended indefinitely with the timer.