/ Products / Ultra-Low & Bi-Directional Disks / Two-Way

Two-WayGraphite Rupture Disk

The TWO-WAY Type Graphite Disk is dual rated to protect against two different pressures in opposite directions.

Get a Quote Explore Z-SIZE

Try Z-SIZE, our user-friendly online tool that calculates the accurate rupture disk size in just minutes

PED (CE) compliance available

Features
Specifications
Installation
Datasheets & Brochures

Dual rated to protect against two different pressures in opposite directions
Applications include protection of storage tanks against both excess vacuum and overpressure when single vessel entry is required
Available in nominal sizes 1-1/2” (40 mm) thru 24” (600 mm) diameters
Designed to fit industry standard flanges ASME B16.5, ISO and JIS
Burst ratings 0.25 psig (0.02 barg) to 1000 psig (68.95 barg) or higher
0% manufacturing range
Operating pressures to 90% of the disk’s marked burst pressure. Contact ZOOK for operating ratio for burst pressures below 40 psig (2.76 barg)
Temperature ratings –290°F to +430°F (–179°C to +221°C). Contact ZOOK for higher temperature ratings. The specified temperature shall be at the disk location at the time when the disk
is expected to rupture
Carbon steel armor standard, 316SS optional
Furnished complete with PTFE gaskets attached. Other gasket materials are available
Generally a minimum differential of 10 psi is required between burst ratings. Contact ZOOK for other burst rating combinations

Two-Way Type Installation Guide
Two-Way Type Installation Guide (Spanish)

Graphite Brochure
Two-Way Datasheet
Large Disk Packaging

Need help to choose the rupture disk size for your specific application?

Try Z-SIZE, our user-friendly online tool that calculates the accurate disk size in just minutes!