Keep Your Low-Pressure Tanks and Systems Safe with Ultra-Low-Pressure Relief Rupture Disks

For industries that require precise pressure management, such as food and beverage, pharmaceutical, and biotechnology, ensuring the safety of processing, fermentation, and storage tanks is critical. Protecting these tanks from both vacuum implosion and over-pressurization is essential to prevent injury, costly downtime, equipment damage, and contamination risks.

ZOOK Z-VAC and Z-POS Series rupture disk and holder assemblies offer a reliable solution for protecting tanks in both vacuum and over-pressurization scenarios. These bi-directional rupture disks provide ultra-low-pressure relief in the millibar range in a compact device, ensuring safety, compliance, and operational efficiency in demanding applications.

Ultra-Low-pressure relief is controlled by a laser cut collapsible girdle.

For Ultra-Low vacuum protection (Z-VAC) vacuum pressure pulls the Teflon seal against the girdle deflecting it towards the razor-sharp knife-blades built into the holder which open the seal. For Ultra-Low over pressure protection (Z-POS) the operating principle is the same with the disk and holder configured in the opposite flow direction.

Laser cut holes in the mid pressure burst cap or non-opening support provide optimum flow when the rupture disk relieves in the Ultra-Low-pressure direction.

What sets the Z-VAC and Z-POS Series apart is their replaceable knife blade design, which ensures optimal safe performance and cost savings over time:

• Enhanced Safety – Worn-out blades can lead to improper rupture disk operation, increasing the risk of tank failure. The replaceable knife blades eliminate this concern.
• Quick Changeovers – On-site spare blades allow for fast replacement, reducing maintenance time and minimizing downtime.
• Lower Operational Costs – No need to replace the entire rupture disk holder—just swap out the knife blades to extend the life of the holder.
• Optimized Performance – The blades ensure a clean and precise cut at ultra-low pressure relief settings, enhancing reliability and safety.

For industries requiring sanitary connections, ZOOK offers ProVAC-S and ProPOS-S sanitary rupture disks. These disks connect with industry-standard Tri-Clamp® / Tri-Clover® sanitary fittings, allowing for easy installation in sanitary processing systems. By providing precise overpressure and vacuum protection, they help maintain system integrity.

The Z-VAC Series provides ultra-low-pressure relief in the vacuum direction, while the Z-POS Series is designed for ultra-low positive pressure relief. Both solutions start at just 1” (25 mm) of water column differential (2.5 mbarg), making them ideal for applications requiring highly accurate, low-pressure protection.

Whether you’re in the food, pharmaceutical, chemical, or biotech industry, ZOOK’s Z-VAC and Z-POS Series—along with our sanitary ProVAC-S and ProPOS-S solutions—offer the best-in-class protection for your tanks, all in one innovative device.

For more details or to request a quote, please get in touch with us.