GE H301 Series, Operating Manual

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H301/302 HSR Compressors | Rev. 2.2 | 81
activates, shutting the compressor down. Remove the blockage before starting up
the compressor.
It is necessary to have a properly sized and working
atmospheric rupture assembly installed in all lubricating
divider block systems. Never remove, modify, or plug an
atmospheric rupture assembly since equipment damage can
result. See the exclusive use of genuine OEM rupture disc
fitting components recommended in “Table 21” .
Complies with ANSI Z535, ISO 3864, OSHA 1910.145 (f) (9)
Atmospheric Rupture Assemblies, Disk Cap Orifice Diameter and Discs
Atmospheric rupture assemblies have a two different sized rupture disk caps:
0.125 inches (3.2 mm) and 0.25 inches (6.4 mm). The aluminum disc ruptures at
a designated pressure, venting lubricating oil to the atmosphere, to relieve the
pressure and shut down the compressor. The pressure at which the disk ruptures
is a function of the aluminum disc’s thickness and corresponding disc cap hole
diameter. There are 8 different thicknesses which are color coded to indicate the
thickness and the rupture pressures. Rupture disc pressure ratings are selected
based upon the gas operating conditions and MAWP of the cylinder (and packing
case) being lubricated.
“Table 21” lists rupture disc assemblies for both 0.125
inches (3.175 mm) and 0.25 inches (6.4 mm) cap orifice diameter, along with the
replacement discs by color that can fit either assembly.
Medium Pressure Assemblies Medium pressure (less than 3500 Psig (241 bar)
rupture assemblies typically use a 0.250 inches (6.4 mm) cap hole.
High Pressure Assemblies High pressure (greater than 3500 Psig (241 bar) rupture
assemblies typically use a 0.125 inches (3.2 mm) cap hole, see "Figure 16" .
FiguRe 16
Rupture assembly