Doc. P/N 8.8128.00.3
Rev. 3 / July, 2020
PAGE / 3
Read these instructions carefully and completely before attempting to unpack, install or service the
bursting disc and holder.
Do not vent a bursting disc assembly to an area where it would endanger personnel.
Install the bursting disc assembly in such a way that equipment in the area will not prevent bursting disc
from opening or be damaged by system discharge.
A baffle plate on the outlet end of vent piping does NOT necessarily prevent potentially dangerous
discharge.
Piping should be braced to absorb shock when the bursting disc ruptures.
Install the enclosed DANGER sign in a conspicuous location near the zone of potential danger.
RD520 Axius and RD320 are not suitable for liquid systems in a 1” size (DN25) at burst pressures less than
20 psig (1.38 barg) and an inlet piping length greater than 10 inches (25 cm).
RD520 Axius and RD320 are not suitable for liquid systems in a ¾” size (DN20) at burst pressures less than
30 psig (2.07 barg) and an inlet piping greater than 8 inches (20 cm).
RD500 Atlas and RD 300 are not suitable for liquid systems in sizes 14” (DN350) and larger.
Spiral wound gaskets may not be suitable for size 1” (DN25). Spiral wound gaskets may not be suitable for
all flange ratings for sizes 2” (DN50) to 4” (DN100). Consult factory.
If the bursting disc features a fluoropolymer liner, do not remove this component.
NOTE: Bursting disc specifications and year of manufacture can be found on the bursting disc tag.
Table 1 - Disc/Holder model compatibility
Disc Model
Holder Model
SRX
SRL / SRLO
XL / XLO
ATLAS / ATLAS-LO
SRX
SRL
1
RD520 Axius
2
RD320
2
RD500 ATLAS
RD300
AGT
(1)
1.5” SRL disc not compatible with 1.5” XL/XLO holder
(2)
1.5” RD520 Axius and RD320 disc not compatible with 1.5” SRL/SRLO holder
