BSG Sight Gauge

Rubber Fab's Bolted Sight Gauge provides fast, continuous inspection from all angles. It is available with either borosilicate or acrylic inserts and includes a buna gasket.

TEMPERATURE: Temperature rating for the borosilicate insert is dependent on temperature rating of gasket used in fitting connection. RFBSG comes standard with buna gasket and a temperature rating of 250˚.
Borosilicate Insert: 250˚F
Acrylic Insert: 180˚F





Part
Number




ID Inch




OAL Inch




No. of Bolts
Max. Working Pressure @ 70˚F Pyrex psiMax. Working Pressure @ 70˚F 
Acrylic psi
08RFBSG0.503.0043781400
12RFBSG0.753.004325450
16RFBSG1.003.634215439
24RFBSG1.503.634150306
32RFBSG  2.003.634130234
40RFBSG2.503.636100160
48RFBSG3.003.63695234
64RFBSG4.003.63860n/a
96RFBSG6.004.63833n/a
RFBSG comes standard with a borosilicate insert and buna gasket. 
This product is factory fabricated.

  • Provides fast, continuous inspection from all angles
  • Available with borosilicate or acrylic inserts
  • Includes buna gasket. Also available with FKM fluoroelastomer and silicone
  • Bevel Seat, Butt Weld, I-Line or Q-Line end configurations available
  • 3-A Sanitary Standards 62-02
    3-A Logo