tubular sight glasses

Tubular sight glasses Type 620 with Flange connections Use: Sight glass – Tubular type with flanges on both sides, to use in either horizontal or vertical pipe lines for optical control of liquids and gases. Flanges matching DIN 2632 / DIN 2633 (PN 10/16) up to DN 150, DIN 2632 (PN 10) above.