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5
Specifications
Flow capacity: 940 SCFM
Set pressure: 15 psig
Reseals “bubble tight” within 3 psi of set
pressure
Refrigerant compatibility: R-11
R-113 & R-123
Weight: 17 pounds
Dimensions (approximate): Length 13
inches; height 13 inches; width 6 inches
Inlet - 2-inch male NPT pipe threads
Outlet - 2-inch female NPT pipe threads
Integral support Boss - 3/4-inch pipe
O-Ring seat - seals bubble tight
VALVE CONSTRUCTED OF STAINLESS
STEEL
Tell-tale pressure gauge
30”Hg -0- 30 psig
Double check pressure equalizing valve
(included)
Every valve 100% tested for pressure
setting and leakage
O-Rings serviceable without disturbing
pressure relief calibration
Carbon fragment collection trap with
specially formulated non-toxic, non-
corrosive tack compound
Direct spring acting
Pivoted spring action corrects mis-
alignment and compensates for spring
side thrust
Calibration is factory sealed to prevent
inadvertent tampering or dis-assembly
High capacity full nozzle design
Instantaneous “pop open” action
BACK PRESSURE COMPENSATED
General Overview
The
RuptureSeal
™ rupture disk backup relief valve, with its exclusive carbon fragment collection trap,
is designed specifically for installation in series with existing carbon type fragmenting rupture disks
used on low pressure (15 psi or below) centrifugal chillers.
The primary function of the
RuptureSeal
™ is to minimize refrigerant loss to the atmosphere in the
event of a burst rupture disk. The
RuptureSeal
™ accomplishes this vital function by automatically
closing off the vent path, thus re-sealing the chiller once pressure returns to normal. In the event of a
burst rupture disk, the
RuptureSeal
™ also serves as the interim primary relief.
NOTE:
The
RuptureSeal™
model number designates the size of carbon fragmenting rupture disk it is
designed to be used with (i.e., the “RS-2” is designed to be used with a two (2”) inch carbon
fragmenting rupture disk designed for centrifugal chillers)..
The RS-2 has a flow capacity of 940
SCFM, however (per ASHRAE guidelines), this capacity must be de-rated 10% when installed in
series with a rupture disk. When fitting the RS-2 to a chiller, the installer must determine if the
de-rated flow capacity is adequate for that chiller.
INCLUDED FOR YOUR CONVENIENCE AS
Appendix “A” IS A TABLE OF VARIOUS VESSEL DIMENSIONS COVERED BY THE MODEL RS-2
RuptureSeal
™
AFTER 10% DE-RATING
based on computations using the formula provided by the
Guideline BSR/ASHRAE 15-1992R.
Appendix “B” of this manual contains the excerpt from the
Guideline BSR/ASHRAE
15-1992R which
can be used to determine the minimum flow capacity
requirement for a pressure-relief device as applied to a low pressure centrifugal chiller.