RLPS - Sanitary Disks


The RLPS Series Sanitary Disk is an extension of ZOOK’s Reverse Acting (RA) Metal Rupture Disk (bursting disc) design. Applications include food processing, dairy, breweries, pharmaceutical, distilling, baking, canning, cosmetics, biotechnology, and petrochemical industries.


  • Provides over-pressure protection in sanitary piping system
  • Ideal for high purity and corrosion resistance service
  • Designed for Non-fragmentation
  • Rugged, scoreless design offers higher cycle life when compared to scored reverse acting disks
  • Excels in liquid, gas, or two-phase applications
  • 0% manufacturing range is standard
  • Operating ratios up to 95% of the low end of burst tolerance
  • Self supporting under full vacuum (with included support ring)
  • Resists product buildup. Only the smooth convex side of the disk is exposed to the process medium
  • Installs using industry standard Tri-clamp®/Tri-clover® fittings (NA-Connect mounting also available)
  • Standard gasket materials: Black Buna-N, Black Viton, Black EPDM, White PTFE (see chart on reverse page for alternate materials)
  • Sizes 1” (25mm) through 4” (100mm)
  • Suitable for Clean-in-place (CIP) applications. Note: Disk dome should not be subject to contact or direct jet spray
  • CE, KOSHA and TÜV compliance available
  • 3-A available for applicable materials and options. Contact ZOOK for more information


Sizes: 1″ – 4″ (25 mm – 100 mm)
Burst Pressure Range: 3 psig – 83 psig (0.21 barg – 5.72 barg)
Standard Operating Range: 95%



 RLPS Datasheet