VAPRO
&POSIPRO
Pressure/Vacuum Disks

The Oseco VAPRO and POSIPRO are economical alternatives for applications requiring both positive and vacuum pressure protection. The VAPRO (vacuum relief) and the POSIPRO (positive pressure relief) operate over a range of 6" W.C. The VAPRO rupture disks are used in applications requiring extremely low vacuum relief; as low as 1" W.C. (vacuum relief) and up to 150 psig (positive pressure relief).

The POSIPRO rupture disks are used in applications requiring extremely low positive pressure relief; as low as 1" W.C.

Both the VAPRO and POSIPRO will rupture at or above the minimum specified pressure and will achieve maximum flow area at or below the maximum specified pressure. (Note: Specified pressure plus 6" W.C. equals maximum specified pressure ) .

These disks may be supplied with perforated composite style controlling membranes,

Fluoropolymer seal and a Fluoropolymer or 316 Stainless Steel girdle .

Fluoropolymer girdles are for applications with temperature limits of 150° F and 316 Stainless Steel girdles are for applications with a temperature limit of 400° F.

Each assembly is used with either an insert assembly or sanitary style holder. The holders typically consist of a stainless steel or carbon steel inlet, a 300 series stainless steel or 17.7 pH knifeblades and an outlet flange to complete the assembly.

• Interchangeable into competitive holders
• VAPRO will operate up to 90% of the minimum negative rating and 80% of the positive rating with excellent service life
• VAPRO available with vacuum relief pressures starting as low as 1" W. C .
• POSIPRO available with positive relief pressures starting as low as 1" W. C .
• Sizes range from 3" through 10"
• For use in both insert and sanitary style holders

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