FG Boiler Gauges

Clear Flat Glass
Boiler Water Gauge Inserts

Steam* Pressure up to 900 PSI @ 534°F

With Mica Shield
Heat-tretaed flat glass with mica protection makes this EFI Gauge Insert an efficient, boiler water level indicator.  Finest quality borosilicate glass of special composition to resist temperature shock is carefully tested for surface trueness and assembled with best quality sheet mica in heavy forged steel housing.  The mica resists corrosive effects of steam and water.  Clamping of the 900 PSI design features individual “fingers” which assemble easily and promote uniform bolt pressure to assure gasket tightness.  The assembly is easily dismantled for cleaning and other maintenance.  Window slot 1/2″ wide provides a highly visible gauge reading which can be accentuated by using an EFI illumination assembly.  Made in single and multiple-window style to handle a wide range of visibility requirements.

 

FG GAUGE 2 FG GAUGE

 

Cross sectional view

MODEL VISIBILITY MINIMUM
GAUGE
APPROX.
WEIGHT
SINGLE WINDOWN INSERTS
EFI FG904 6-5/8″ 17 22
EFI FG905 7-3/4″ 18 25
EFI FG906 9″ 20 28
EFI FG907 10-1/8″ 21 31
EFI FG908 11-3/4″ 22 34
EFI FG909 12-1/2″ 23 37
DOUBLE WINDOW INSERTS
EFI FG966 15″ 26 62
EFI FG977 17-1/2″ 29 67
EFI FG988 20″ 31 72
EFI FG999 21-1/2″ 33 78
Minimum centers shown apply to use with EFI SG854 or EFI SG860

WARNING: For use with POWER BOILER SATURATED STEAM APPLICATIONS ONLY.
MODEL EFI FG BOILER WATER GAUGE INSERTS ARE NOT TO BE USED WITH SUPERHEATED STEAM.