Marotta's extensive In-House Capabilities are
available to meet your Precision Assembly
and Demanding Testing Requirements
Assembly and Test Capabilities Overview
Our Assembly & Test Department is responsible for total
assembly and in-process testing of components and systems.
Assembly and Test receives a complete kit for each
component/ system package- all the necessary parts to produce the final
product. The package includes assembly drawings, procedures, inspection
criteria, in-process testing, and final acceptance test procedures.
Special hardware assembled at Marotta occurs in the 1,000 square foot
class 10,000 Clean Room. This Clean Room is monitored and controlled in
accordance with FED-STD 209.
The majority of components/systems produced by Marotta
are "active control products" requiring 100 percent final acceptance
testing. To achieve that requirement, Marotta maintains a complete on-site
high performance test capability including:
Pneumatic up to 15,000 psig, and up to 20,000 SCFM @ 6,000 psig Hydraulic up to 10,000 psig, and up to 250 GPM @ 3,000 psig Hydrostatic up to 40,000 psig Vacuum down to 1 x 10-2 TORR Environmental - vibration, contamination, thermal, shock, explosion, humidity, sub-sea, salt spray, life cycle & more
Our extensive on-site capabilities and efficient methods yield very competitive rates.
For more information about Marotta's Assembly and Testing Services, please review the
items below or contact us for help with your specific requirements.
High Pressure - High Flow
Gaseous nitrogen is supplied from a liquid nitrogen
storage tank through a heat exchanger and compressors. The storage
capacity of 55 cubic feet at a maximum pressure of 6,500 psig. This
facility can produce short duration flow rates of 20,000 SCFM at 6,000
psig.
High Pressure - Intermediate Flow
The high pressure, intermediate flow test area contains
14 individual 250 SCFM high pressure pneumatic test stands, each stand
capable of pressure to 6,000 psig.
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High Pressure - High Flow
The high pressure, high flow facility contains two
units. One unit provides flow rates of 250 GPM at 3,000 psig. The second
unit provides short duration pressures to 10,000 psig of
chlorotrifluoroethylene (CTFE) and MIL-H-6083 or 5606 hydraulic fluid.
High Pressure - Intermediate Flow
The intermediate flow facility has sustained flow
capability of 10 GPM at 3,000 psig.
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Marotta designed and developed its hydrostatic test
facility. This unique facility can test components and systems using
gaseous nitrogen or helium at pressures up to 20,000 psig. This unit is
enclosed, yet permits full operational control and visual assessment
through bullet-proof glass viewing windows.
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Components and systems can be tested in Marotta's
vacuum test facility to 1 x 10-2 TORR.
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High- and low-temperature tests are performed using 10
environmental chambers ranging in size from 1 ft3 to 30 ft3. The normal
operating range of the chambers is -100°F to 400°F. These chambers are
used for in-house development, acceptance testing, and qualification
testing to customer specifications and requirements
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1,000 sq. ft. clean room (Class 10,000) in accordance
with FED-STD 209. Six Flow Benches (Class 100) with flow hoods, in
accordance with FED-STD 209.
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The Tenny humidity chamber is used to evaluate
environmental seal characteristics, performance, and corrosion resistance
of the materials specified by our customers. The chamber is capable of
temperature and humidity gradations of 1°F and 5% humidity for +68°F to
+185°F and 20% to 98% respectively.
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Marotta has in-house capability to perform
nondestructive testing in the following categories:
- Penetrant
- Fluoroluminescent (black light)
Should requirements dictate, Marotta subcontracts to
independent laboratories for specialized nondestructive testing such as:
- Magnetic Particle
- Ultrasonic
- Xray
- Infrared Spectrophotometer
- Cryogenic Flows
- High Vacuum and Thermal Vacuum
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Marotta has the capability and facilities to conduct
testing of components and systems that require performance evaluations
outside the realm of standard fluids. Fluids used include:
- Helium
- Nitrogen
- Ammonia
- Nitrogen Tetroxide
- Freon
- Hydrogen
- UNS-Dimethylhydrazine
- Skydrol
- Fluorine
- Oxygen
- Hydrazine
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Soldering is performed in accordance with MIL-STD-2000,
and NHB5300.4(3A-1). All personnel performing soldering operations are
qualified and certified to the above soldering standards.
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Standard welding, as well as sophisticated techniques
such as Laser, Electron Beam, and Gas Tungsten Arc Welding (GTAW) beam,
are subcontracted to qualified laboratories that meet Marotta quality
assurance standards. Most GTAW is performed out of house. Marotta has the
capability to silver solder various subassemblies when required.
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Marotta products are utilized in programs and on
systems that require the most stringent standards in contamination
control. Marotta's contamination control standards and Marotta process
standards meet or exceed the cleanliness requirements of the industries
served (including commercial, military, nuclear and space applications).
Whether the requirement is for gas, liquid, oxygen, or exotic-propellant
fuels, Marotta has a documented cleaning, processing and packaging
procedure to fit the specification. Marotta has over 200 distinct cleaning
procedures on file.
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In-house capabilities to achieve finishes to ± 1µ.
Flatness to ± 0.000001".
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Before assembly, all component metal parts are examined
visually for evidence of corrosion. Suspected indications of corrosion are
identified for the nature of the deposits, and then removed by standard
methods relative to the identified corrosion type.
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Passivation of stainless steel surfaces is accomplished
by immersion in a 25-45 percent nitric acid bath at ambient temperature
for 30 minutes or by immersion in nitric acid chromate solution bath for
30 minutes.
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Nonvolatile residue are determined by two different
types of methods depending on the fluid used for the final rinse. Grade A
isopropyl alcohol, Spec. TT-I-735 is filtered through 0.3 micron membrane
used in conjunction with an analytical balance, readable down to 0.01
milligrams, to determine the amount of nonvolatile residues remaining in
alcohol final rinse fluid. DC-190 High Temperature Total Organic Carbon
Analyzer is used with deionized water, High Purity, Spec TSC-SPEC-C-20
Grade A filtered through a 0.2 micron membrane filter, to determine the
amount of nonvolatile residue in parts per million.
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As requested, parts are examined using ultraviolet
light. Oil deposits are detected by the refraction of the florescent light
from the contaminated areas
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Final cleaning procedures are performed using either a
liquid or gas flush. The resultant liquid or gas content is
microscopically examined for quantity, size, and distribution of any
particulates.
The millipore filtration membrane method is used with
particulate counts determined by using magnification intensities up to
100X.
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Marotta uses its own test capability to prove concepts
and establish performance criteria. For some programs, environmental test
laboratories are used when systems have size, weight, and test
requirements that exceed Marotta's in-house capabilities. They are also
used if Marotta is seeking an independent appraisal.
Laboratories selected by Marotta are inspected, audited
and qualified to meet Marotta's strict standards of performance. Complete
test procedures, including test conduct,
instrumentation, records and report requirements are generated by Marotta.
All critical environmental test sequences are witnessed by Marotta
assurance personnel.
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