Clearly the Preferred Choice

APG’s line of flat industrial glass is designed for use in almost all operating conditions, including high-pressure and reflex.  This glass is commonly used for viewing liquid levels in industrial applications.  APG’s flat glass is manufactured from borosilicate which is knowns for having a very low coefficient of thermal expansion and thus is more resistant to thermal shock than other glasses. All flat industrial glass is designed to be used in armored-type liquid level gauges and can be cut to your exact specifications.

APG offers industrial flat glass in 3 types:

• Type A Plain – designed for moderate-pressure seam boilers and for liquid level indicators.
• Type A High Pressure – designed for high pressure applications and harsh service environments. This glass is rated for non-steam applications up to 5,000 PSI.
• Type B Reflex – is made for extra ease in locating liquid levels. Type B reflux glass has vertical prisms extending the full viewing length of the glass.  The prism side is designed to face the liquid and during service conditions, the prisms not covered with liquid reflect light spectacularly. This glass is optimal for long sight distance liquid level indicating.

APG’s tubular gage glass, manufactured by Duran® a division of SCHOTT AG and Pyrex® a Corning Brand, is offered in red line, standard, heavy wall, high pressure and heavy wall red line configurations.  APG can custom fabricate any length and end finish including cut, ground, or fire polished depending on your application.  Pressure ratings range from 90 PSI to 600 PSI depending on the end finish, diameter and length required.  APG’s tubular gage glass has outstanding resistance in chemical applications.

• Standard Gauge Glass- economical, low pressure applications, long service life.
• Applications: Low pressure boilers, restaurant equipment, closed tanks, liquid level gauges, sight flow, film rolls hydraulic equipment.
• Heavy Wall Gauge Glass- reliable, long service life, optimal for low pressure water or gas flow
• Applications: Crude oil, water and gas flow meters, boilers, food processing, brewing and distilling
• Heavy Wall Tubing- The most popular type of glass in the world for scientific laboratory applications.  APG’s heavy wall tubing meets all US pharmacopoeia specifications for Type 1A glass.
• Applications: pharmaceutical processing, laboratory equipment, food processing.
• High Pressure Gauge Glass- Visual indication of liquid flow, contamination or discoloration of liquid, visual flow metering
• Applications: High pressure fluid monitoring and metering.  Food, beverage and pharmaceutical processing
• Standard Red Line Gauge Glass- Our standard gauge glass with the added benefit of a red line that enable easier, quicker, more accurate liquid level readings.
• Applications: Low pressure boilers, restaurant equipment, closed tanks, liquid level gauges, sight flow, film rolls hydraulic equipment.
• Heavy Wall Red Line Gauge Glass- Our heavy wall gauge glass with the added benefit of a red line that enable easier, quicker, more accurate liquid level readings.
• Applications: Crude oil, water and gas flow meters, boilers, food processing, brewing and distilling

APG offers 3/4” annular edge mold finished glass for low pressure service. Annular edge glass has a ½” wide gasket surface and provides optical clarity and increased thermal shock resistance for operators.  Common applications for APG’s sight glass are utilities and power equipment, pharmaceuticals, food and beverage, biofuel production, wastewater treatment and management as-well-as chemical and petrochemical production and transmission.  Annular edge glass is offered in two different types:

Annealed – for normal and alkaline use

Tempered – for pressure and extreme temperature applications

APG offers a large selection of industrial glass accessories including:

• Flat glass gaskets
• Klingersil ®
• Grafoil
• Teflon
• Additional materials upon request
• Mica shields
• Marvel gauge glass gaskets
• Rigid plastic tubing
• Brass guard rods
• Glass cutters
• Conbraco water gauges