Circular sight glass fitting DIN 28120:

  • Block flange to be welded directly to tank.
  • DN 25 – DN 200.
  • Operating pressure of 10 bar and 16 (6 and 25 bar on request).
  • Temperature of 150° C and 280° C.
  • Mica suitable for aggressive mediums and temperature of 300° C.
  • Also available in a light version of 2.5 or 6 bar according to DIN 28120.
  • Special versions available according to customers’ requirements.
  • Optional certificate 2.2 or 3.1 B to EN 10204.

Materials:

Block Flange:RST 37-2, H II, C 22.8, WN 1.4541, 1.4571 or alternative.
Deck flange:RST 37-2, H II, C 22.8, WN 1.4541, 1.4571 or alternative.
Glass:Borosilicate glass DIN 7080 and soda lime glass DIN 8902.
Gaskets:Klingersil or according to customers’ requirements.
Bolts:5,6 galvanized, A2-70, A4-70.

Options:

Available with (Ex) lights, camera, wipers, washer, O-ring seal (vacuum seal), double glass with heating element, mica, glass protection and metal fused sight glass.

Alternative round sight glass fittings:

Screw sight glass similar DIN 11851:

  • DN 50-125.
  • Operating pressure 6 bar.
  • Temperature 220° C.
  • Welding flange WN 1.4404 or WN 1.4301.
  • Tightening nut WN 1.4301.
  • Optional certificate 2.2 or 3.1 B to EN 10204.