MIL-S-53120
side, and LP (40 to 350 psig) outlets on the right side. The control panel
shall consist of primary and secondary HP shutoff valves, a manual adjust
regulator, two LP inlet stop check valves, HP and LP gauges with isolation . `
valves, LP outlet valve, and bleed off valve. The CRS shall receive HP air
from the DASS and shall receive LP air from two 88.5 cfm compressors.
Primary HP control circuit shall consist of a shutoff valve and a manual
adjust regulator to control a dome (loader) regulator's discharge (40 to 350
lbs) and shall be capable of pressuring a 201 cubic-foot recompression
chamber (inner lock) to 165 FSW (73.4 psi) in under 3 minutes. Secondary HP
control circuit shall consist of a shutoff valve and a manual adjust
regulator and continues recompression which allows at least 71 SCFM for 60
minutes at 5 atmosphere (ATMs) at a reduced flow rate. The LP control
circuit shall consist of two valves to control air from one or two air
compressors and shall be capable of pressuring the inner lock of a 201 cubic-
foot recompression chamber in under 3 minutes. All air supplies shall feed a
manifold and shall be controlled by an LP outlet valve to bulkhead fittings.
The CRS shall be connected to the recompression chamber by two 10-feet long,
LP hoses.
e. eck and interconnecting hoses. HP deck hoses shall be used to connect the
HP compressor to the DASS, the DASS to the DACC or CRS. HP hoses shall also
be used to interconnect flask racks. LP deck hoses shall be used to connect
the LP compressors to the DACC or CRS and the DACC to the VTA. LP deck hoses
shall also be used to connect the CRS to the recompression chamber.
3.1.1 Drawings
The drawings forming a part of this specification are end
product drawings." No deviations from the prescribed dimensions or tolerances is
permissible without prior approval of the contracting officer. Because of the
life support nature of the SDASS, no deviations from the cleaning instructions
found in the drawing package is permissible without the prior written approval of
the contracting officer. Where tolerances could cumulatively result in incorrect
fits, the contractor shall provide tolerances within those prescribed on the
drawings to ensure correct fit, assembly, and operation of the equipment. Any
data (e.g., shop drawings, layouts, flow sheets, processing procedures, etc.)
prepared by the contractor or obtained from a vendor to support fabrication and
manufacture of the production item shall be made available, upon request, for
inspection by the contracting officer or the designated representative.
3.2 First article. Unless otherwise specified (see 6.2), a sample shall be
subjected to first article inspection (see 6.3) and in accordance with 4.3.
3.3 Material. Material shall be as specified herein and in the drawing
package. Materials not specified shall be selected by the contractor and shall be
subject to all provisions of this specification and drawing(s) package.
3.3.1 Material deterioration Prevention and cent rol. The SDASS shall be
fabricated from compatible materials, inherently corrosion resistant or treated to
provide protection against the various forms of corrosion and deterioration that
may be encountered in any of the applicable operating and storage environments to
which the SDASS may be exposed.
3.3.2 Dissimilar metals. Dissimilar metals shall not be used in intimate
contact with each other unless protected against galvanic corrosion (e.g., when
fabricating the stainless steel LP volume tank. Lower grade steel or ferritic
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