CAL-VAC® RUPTURE DISC - CDC
Relieve ultra-low vacuum or positive pressure conditions with the highly accurate, bidirectional CAL-VAC rupture disc.
Our double-acting design allows the CAL-VAC to do the work of two rupture discs with just one installation point. It relieves low vacuum pressure (as low as 1 inwc) on one side, while slightly higher pressure is relieved from the other.
The CAL-VAC’s easy-to-clean flat seat design reduces product buildup, making it easier to meet FDA requirements.
Looking for the POS-A-SET rupture disc? Nearly identical to the CAL-VAC rupture disc, the POS-A-SET relieves ultra-low pressure in the positive direction – the inverse of the CAL-VAC’s ultra-low relief in the negative direction. Contact us if you aren’t sure which you need.
CAL-VAC® Rupture Disc Features:
Two sides to the CAL-VAC rupture disc
As system vacuum approaches the burst pressure setting on the ultra-low vacuum side, a girdle is loaded until it deflects back past a knife blade assembly in the holder. As the girdle passes the knife blade, the seal is divided in a triangular pattern to relieve the vacuum.
On the higher-pressure side, the perforated metal top section, under tension loading, relieves pressure in the direction opposite the girdle. It incorporates CDC’s seven-hole pattern at the apex of the rupture disc dome. Together, the seven-hole pattern and six pre-cut sections create a non-fragmenting design.
Additionally, the top section’s pre-punched holes provide optimum flow through the disc when relieving ultra-low vacuum through the girdle.
CAL-VAC rupture discs vs. POS-A-SET rupture discs
The difference between the CAL-VAC and the POS-A-SET is the orientation of pressure relief components. The CAL-VAC relieves ultra low-pressure in the vacuum (negative) pressure direction, while the POS-A-SET Rupture Disc relieves ultra low-pressure in the positive pressure direction.
Both designs:
- Relieve pressure as low as 1 inwc differential
- Are dual-acting, providing both both positive and negative pressure protection
- Can be made to meet 3A sanitary standards when used with a sanitary fitting holder assembly
- Provide lower maintenance costs and greater reliability compared to a valve, increasing your system productivity
- Do not include moving parts, eliminating the possibility of mechanical malfunction
Brochure / Specs
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CAL-VAC (FS)
CAL-VAC (FS)
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CAL-VAC (S.F.)
CAL-VAC (S.F.)
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CAL-VAC/POS-A-SET Rupture Disc Assemblies Datasheet
CAL-VAC/POS-A-SET Rupture Disc Assemblies Datasheet
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Total Sanitary Solutions
Total Sanitary Solutions