Zook Rupture Disc URA
Zook Rupture Disc URA
Zook Rupture Disc URA
URA Series
Universal Reverse-Acting Rupture Disks
1952
Features
Single disk design covers 95% of plant requirements Scoreless design offers higher cycle life when compared to scored reverse-acting disks Low and high burst pressures available in a single design Excels in liquid or gas applications 0% manufacturing range is standard Operates to 90% of the disks rated burst pressure Non-fragmenting design Withstands full vacuum without vacuum support Excellent for isolating safety relief valves Damage ratio of 1.0 or less Resists product buildup. Only the smooth convex side of the disk is exposed to the process medium Additional TFE corrosion protection available (specify URA-L) 3dimensional stainless steel tag is standard ASME UD marking available
HOLDER
PRESSURE The process pressure is applied to the convex side of the URA Disk placing the dome of the disk into compression. As the pressure rises past 90%, the dome becomes unstable eventually collapsing onto a shear ring that efficiently cuts the disk wide open upon reversal. The state-of-the-art shear ring allows the disk to function on both low pressure and liquid applications.
URA Disk Minimum and Maximum Pressures Ratings psig (bar) @72F (22C) Temperature Specifications
Minimum URA-L Disk Size with TFE Liner 1 25 mm 1-1/2 40 mm 2 50 mm 3 80 mm 34 2.34 20 1.38 18. 1.24 16. 1.10 Nickel min. max. 22. 1000 1.52 68.97 20 900 1.38 62.07 18 850 1.24 58.62 16 750 1.10 51.72 14 650 0.97 44.83 12 400 0.83 27.59 12 250 0.83 17.24 750F (399C) Disk Material Burst Pressure Range Inconel Monel 316SS min. max. min. max. min. max. 22 1000 22 1000 24 1000 1.52 68.97 1.52 68.97 1.66 68.97 20 1000 20 900 22 1000 1.38 68.97 1.38 62.07 1.52 68.97 18 900 18 850 20 900 1.24 62.07 1.24 58.62 1.38 62.07 16 900 16 750 18 900 1.10 62.07 1.10 51.72 1.24 62.07 14 800 0.97 55.17 12 450 0.83 31.03 12 300 0.83 20.69 900F (482C) 14 650 0.97 44.83 12 400 0.83 27.59 12 250 0.83 17.24 800F (427C) 16 800 1.10 55.17 14 450 0.97 31.03 12 300 0.83 20.69 900F (482C) Hastelloy min. max. 24 1000 1.66 68.97 22 1000 1.52 68.97 20 1000 1.38 68.97 18 1000 1.24 68.97 16 900 1.10 62.07 14 500 0.97 34.48 12 350 0.83 24.14 900F (482C)
Notes:
4 14. 100 mm 0.97 6 12 150 mm 0.83 8 12 200 mm 0.83 Max. Temp. 500F(260C)
General Notes:
exclusively to be used with the URA Series Rupture Disk Non-torque sensitive flat seat design The URA-I Holder and Rupture Disk are assembled using safety designed side clips Standard materials of construction: 316SS and carbon steel. Other materials available upon request Permanently attached stainless steel nameplates are standard. Nameplates indicate flow direction and provide visual verification that holder assembly is properly oriented in the piping system Available options include: gauge tap; nipple and tee; excess flow valve; pressure gauge; J-hook; special facings and coatings
Servicing Rupture Disk needs worldwide from manufacturing facilities located in 3 countries on 2 continents
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