Bursting Discs, Burst Indication, Static Mixers, Heat Exchanger.

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Forward acting metal bursting disks

Series SZ
Types SZ-X / SZ-M / SZ-MV

Forward acting metal bursting disks are installed in a standard holder SHZ or in a pre-torqued holder SHZ Pro between flanges. They are especially suitable for securing medium to high working pressures.

Design examples
metal bursting disks

SZ-X in DN25

bursting disk in holder

SZ-X in the holder SH-Z, opened disk

SZ-X STRIKO – forward acting, x-form scored
SZ-M STRIKO – forward acting, Multi-part (layer) design
SZ-MV STRIKO – forward acting, Multi-part, Vacuum resistant


Advantages in the application
  • fragment-free opening behaviour
  • ideal as single pressure relief unit or used in combination with safety valve
  • high working ratio: up to 90%
  • “Fail-Safe” design – incorrect installation leads to bursting of the SZ-X at or underneath the actual burst pressure
  • also obtainable with a PTFE-liner
  • equipped with a 3D name-plate for safe detection of correct direction of installation as a standard
  • suitable for gasses, vapours and liquids


Materials Stainless steels, nickel, special materials such as hastelloy, tantal
Nominal widths DN 15 – DN 250
Burst pressures from 0.02 bar (g) to 200 bar (g)
Working ratio up to 90 %
Burst tolerance min +/- 5 %
Utilisation temperature range -200 ℃ to +480 ℃
Bursting disk holder SHZ and SHZ Pro
Vacuum support optional
Burst / Leakage indication optionally installed on discharge side
Installation before safety valve? yes, since fragment-free opening


Individual designs

There are a number of design options for the forward acting metal bursting disks. Whether vacuum resistant, with PTFE-liner or manufactured from special materials – just talk to our specialists. We are happy to advise you competently and comprehensively, in order to find the right solution for your application.


Accessories – Burst / Leakage Indication
Series Description
SVT 02 Burst Indicatior for breakage of bursting disk / opening of safety valve
SVT 05 Leakage sensor (activates already for the smallest leaks)
SVT AM Full metal alarm for bursting disk monitoring (for high temperatures up to +600 ℃
and at aggressive media)
SVT AM-L Alarm for bursting disks/breakage monitoring (use for lowest burst pressures,
from 10 mbar (g))

PDF Application Data Sheet Bursting Disk