These observation ports are for low-pressure applications only. The Blast Gate Observation Ports use the Tate-Jones standard line of blast gates as the primary components and incorporates a mating flange, gaskets, and the glass lens which is secured by a metal retaining ring. The stainless steel slide arrangement in the blast gate gives added protection and life to the lens during operations, and allows maintenance to be performed with added safety during vessel down-time. Additional cooling can be obtained by adding a purge connection on the glass or vessel side of the blast gate housing. Three choices of glass are available for varying temperature exposures and viewing requirements. American Standard 125 flange pattern observation ports are available in 4" to 12 " sizes. Fabrication in alternative materials is available upon request. A special half-flanged, half-threaded unit is available in 3" and 4" sizes only.

Options and Specifications

FLANGED BLAST GATE OBSERVATION PORTS (in Inches)   (In Pounds) Pipe Size View Area (Dia.) A B C D E F G Bolt Size Bolt Circle Unpacked Weight 4 3-9/16 15-1/4 4-1/4 4-9/16 5-5/16 5-3/4 9 4-1/4 5/8 8 holes on a 7-1/2" bolt circle 28 6 5-9/16 23 4-3/4 5-1/16 5-13/16 9 11 6-1/4 3/4 8 holes on a 9-1/2" bolt circle 59 8 7-9/16 28-1/2 5-1/8 5-7/16 6-3/16 11 13-1/2 8-1/4 3/4 8 holes on a 11-3/4" bolt circle 87 10 9-1/2 31-3/4 5-3/8 5-11/16 6-7/16 13-1/2 16 10-3/8 7/8 12 holes on a 14-1/4" bolt circle 136 12 11-1/2 37-1/4 6-3/8 6-11/16 7-7/16 16 19 12-5/8 7/8 12 holes on a 17" circle 190 GLASS OPTIONS Code Numbers Thickness Maximum Intermittment Temperature Maximum Continuous Temperature Pyrex (Borosilicate) Glass P 1/4" 554° F 446° F Cobalt Blue Glass CB 3/16" 554° F 446° F Quartz Glass Q 1/4" 2048°F 1600° F Temperature ratings apply only for the operating conditions of the glass. Ratings for housings vary on type of steel