Cleanliness Verification Testing

A critical step in the Precision Cleaning process is Cleanliness Verification Testing, which ensures that cleaned parts and components meet the determined cleanliness level as noted in the specification. Our proprietary process, equipment and facility allows us to attain cleanliness levels in the range of IEST 1246 D Level 50A to IEST 1246 Levels A/10 and A/20.

To ensure cleanliness, we verify levels using optical particle counters and gravimetric NVR equipment, photoionization detectors for solvent detection and dryness verification and digital dew-point meters for water dryness verification. Additionally, we use fume hoods, laminar flow hoods, and a complete wet chemistry laboratory for research and development complement the cleaning and testing services.

Whether cleaning and confirming particulate levels, non-volatile residue levels, or other contamination limits, Astro Pak is expertly equipped to meet your precision cleaning and verification needs.

Astro Pak Performs the following Cleaning Measurements:

Particle Count: measures the numbers and sizes of particles remaining on the surface.

Non-Volatile Residue (NVR): The measurement of residues, which are mostly oils and greases, which remain on the cleaned surface.

Total Filterable Solids (TFS): This is similar to a Particle Count, except that in this verification, we collectively weight to determine their total mass using the same precision analytical microbalance used in the NVR measurement.

Solvent Removal: This is the assurance that no solvent remains behind after the cleaning and contaminant extraction processes are completed.

Dewpoint: This measurement is capable of detecting trace amounts of moisture and quantifying them, allowing us to determine the exact state of dryness of the hardware, assuring that no excess moisture remains.

Component & System Experience

  • Components &¬†Hardware
  • Valves (Relief, Ball, Butterfly, Needle, Gate, etc)
  • Gauges (Pressure, Flow meter, Hydraulic, Cryogenic)
  • Fittings, Fasteners
  • Filters & Filter Housings
  • Transducers & Sensors
  • Equipment or sub-systems
  • Oxygen & Critical Gas / LOX Tubing and Componentry
  • Laser & Optics Componentry
  • Hydraulic componentry
  • Medical devices
  • Aircraft, Space and Military Componentry
  • Heat Exchangers
  • Pipe, Tubing and Hoses
  • Spools, Flanges, Gaskets
  • Tanks, vessels
  • Manifolds
  • Miscellaneous Assemblies


  • ASTM F-311, F-312, F-331
  • IEST CC 1246 D
  • ASTM A967-13 Practices D, E, and F
Request info