Glass-Trac Liquid Level Gauges and Valves
Specialty Gauges
Illuminators (Explosion Proof) 
The Quest-Tec Solutions See-Level™ LED Illuminator for hazardous locations utilizes the latest technology to provide brilliant green back lighting to any process gage. Innovative circuitry allows for the use of an individual light source every ½” along the length of any gage. With a life span of over 100,000 hours each, light source is likely to never need replacing. Even in the event of an individual lamp failure, the design provides lighting overlap ensuring that the fluid level is always illuminated. All of this is accomplished with a meager 5 watts of power usage.
Through the use of new attachment techniques, the See- Level™ Illuminator readily mounts to any brand of existing or new process gages in a matter of minutes without the loosening of any cover bolting. Mounting requires no special tools or modifications to the existing structure. Set it up, attach the power and go! It’s that easy.
The modular design allows for a single illuminator to be manufactured to your specific visible length eliminating the labor involved in mounting and wiring multiple illuminators.
Glass-Trac standard gage glass is made of borosilicate glass. For higher temperature service or requirements, aluminosilicate glass can be supplied.
Mica shields are available for use with Transparent Gages in steam boiler service enabling glass to be used in higher pressures. They are placed between gasket and glass. KEL-F® shields are available for use with Transparent Gages in corrosive service.
NOTE: For cyclic temperature applications, or to aid in torque retention, spring washers are available upon request.
HEATED / COOLED EXTERNALLY
Glass-Trac Externally Heated/Cooled Gages may be either low Pressure or Mid Pressure or Mid Pressure, Reflex or Transparent and have ½” or
¾” NPT Connections. Pressure-temperature ratings and sizes remain the same as standard flat gages.
On externally heated/cooled gages a metal tube is employed to transmit heating or cooling fluid. The tubing starts from an adaptor nut on one valve, passes along a machined groove in the gage body wall and connects to the adaptor nut in the opposite valve. Fluid piped through the tubing serves as the heating or cooling media. Gage bodies (liquid chambers) are made extra long to accommodate the groove and tubing.
Most common heating fluids are steam and hot water. To cool gages, methane, propane, freon and ammonia refrigerants are used.
The adaptor nut on the gage valves can be fitted with either a ½” NPT Female Tank connections or
a ¾” NPT Male Tank connection. Valve Types 1,2
and 4 may be used.
When ordering Glass-Trac Externally Heated/ Cooled Gages, add HC to the gage size number.
FROST PREVENTION EXTENSION
Glass-Trac plastic extensions for flat gage glasses prevent frost from forming in the liquid level view slot in low temperature services. Reflex and Transparent Gages in all pressure ratings can be fitted with plastic extensions.
Projecting from the view slot, the clear plastic extensions keeps the liquid level indication clearly visible. Stocked extensions are 1⅝” and 3⅝” in length. If the gage is thickly insulated, longer extensions are available. The extension is held in place by stainless steel clamps fastened to the gage cover. For extra low temperature services, Glass- Trac gages can be made of special metals.
Recommended length for Frost Preventive Extensions: 1⅝” extension is standard from 80ºF ambient to 0ºF temperature. Add 1” extension length for each 100º F below 0º F.
When ordering, specify length and add FP to gage size number.
| Document Number | Description | File Size | Download |
| Product Bulletins | |||
| 100-00 | Glass-Trac Liquid Level Gages and Valves | 6554kb | Download |
| Technical Documents | |||
| 110-00 | Liquid Level Gage Specifying Guide | 1587kb | Download |
| 120-31 | Heated/Cooled Externally Low Pressure Gage Drawing | 276kb | Download |
| 120-32 | Heated/Cooled Externally Medium Pressure Gage Drawing | 304kb | Download |
| 120-33 | Frost Prevention Low Pressure Gage Drawing | 286kb | Download |
| 120-34 | Frost Prevention Medium Pressure Gage Drawing | 261kb | Download |
| 130-00 | Installation and Operating Instructions | 429kb | Download |
| 130-01 | Maintenance Tip Sheet | 345kb | Download |