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Zook ZVac-ZPos Bursting Disc – Ultra Low-Pressure

Tank Venting Zook
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The Zook ZVac-ZPos Bursting Disc Series offers bi-directional rupture disc and holder assemblies designed to manage ultra-low pressures. These discs protect processing, fermentation, storage tanks, and low-strength vessels from both vacuum implosion and over-pressure failures. The Z-VAC and Z-POS models are engineered for ultra-low pressure relief, with settings starting at 1 inch (25 mm) of water column. They feature replaceable knife blades for the Z-VAC model and a dual-acting design for the Z-POS model. Both models ensure non-fragmenting openings and can be customized to meet a broad range of non-standard specifications and applications.

  • Specifications
  • Technical Data
  • Advantages
  • Industries
  • Applications
  • Documents
  • Contact

Specifications

  • Highly Accurate Burst Pressures: Starting at 1 inch (25 mm) water column
  • Sizes: 2” to 12” / 50 mm to 300 mm
  • Burst Ratings: From 1 inch (25 mm) water column to 150 psig (10.34 barg)
  • Temperature Ratings: Up to 500˚F (260˚C)
  • Materials of Construction: Standard 316SS or carbon steel; other materials available upon request
  • Holder Design: Preassembled using safety-designed clips; user-replaceable knife blades
  • Additional Features: Permanently attached 3D stainless steel tags; optional integral burst indication

Technical Data

  • Z-VAC Operation: Utilizes a laser-cut collapsible girdle and replaceable knife blades to relieve ultra-low vacuum pressure. The vacuum side incorporates a Teflon seal that collapses and is cut by knife blades as the vacuum pressure reaches the relief setting. Positive pressure relief is managed by a laser-cut metal top control cap.
  • Z-POS Operation: Uses a girdle to manage positive pressure relief. As system pressure approaches the burst setting, the Teflon seal presses against the girdle, which is cut by knife blades. Vacuum relief is managed by a metal top section with tension loading.

Advantages

  • Highly Accurate: Ultra-low burst pressures starting at 1 inch (25 mm) water column
  • Replaceable Knife Blades: Allows for maintenance and reduces downtime
  • Non-Fragmenting Design: Ensures safe operation with minimal risk of debris
  • Dual-Acting Design: Provides reliable relief in both vacuum and positive pressure directions
  • Easy Maintenance: Tool-free replacement of knife blades and direct access for servicing

Industries

  • Food Processing
  • Chemical Processing
  • Pharmaceutical Manufacturing
  • Biotechnology
  • Cosmetics

Applications

  • Vacuum and Overpressure Protection: For processing, fermentation, and storage tanks
  • Ultra-Low Pressure Relief: For environments requiring precise control of both vacuum and positive pressures

Contact Us

Do you have questions or comments about receiving a quote, our products, solutions and services, and support? Contact us by filling out the form.

  • Brendan Merrigan (External) – Mob: 087 2598124
  • Conor Foley - Tel: 021 461 7206
  • Office Tel: 021 461 7200

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