Union type sight glass
The sight glass is used for checking the liquid inside the system,its 360 degree views.
Specification: DN10-DN150, 1/2"-6", larger size can be customized
Standard: DIN, SMS, 3A, ISO, IDF, RJT, AS, BS, BPE
Connection: Welded, threaded, clamped, flanged, union-type available
Shape: Straight, cross, union type
It's made by CNC machine.