Habonim Catalog Interactive 2021 V04 070621 - Flipbook - Page 40
An integral rib is machined at one of the stem flats to match a groove in the ball that faces
the relief hole. A "T" mark on the stem tip shows the relief hole direction. These two features
ensure a one-way assembly for safe operation and maintenance.
Each cryogenic valve is equipped with a mechanism that prevents pressure buildup in the
valve cavity, eliminating the risk that liquefied-gas evaporation will over - pressure the valve
body by releasing over-pressured media from the cavity area back to the line.
Habonim uses a variety of such mechanisms:
• Relief hole on the upstream sphere of the ball to prevent pressure buildup in the cavity
• Spring loaded seat construction with piston effect for cavity pressure relief
• Single seat active seal construction - no closed cavity
"T" mark on stem showing
the relief hole direction