High Purity Components Inventory

Over $3M in UHP and Instrumentation Components in Stock.

With its industry sources and buying power, CSI has been providing new ‘surplus’ and high quality used or refurbished components to budget savvy customers for over 12 years.  Our inventory is from the leading manufacturers in the industry: Swagelok, Parker, BAR, Hamlet, APTech, Veriflo, Tescom, George Fisher, Asahi, Valex, Cardinal, Wika, Pall, Mykrolis, Entegris and many others.

Contact us today for pricing and availability on your requirements for any of the following:

Pressure Control:

  • Pressure Regulators
  • Diaphragm Valves
  • Mass Flow Controllers

Pressure Measurement:

  • Pressure Gauges
  • Transducers
  • Flow Meters

Pressure Conditioning:

  • Gas Filtration
  • Gas Purification
  • Liquid Filtration

Pressure Containment:

  • Electropolished Tubing
  • Coax Tubing
  • EVAC Tubing
  • Teflon Tubing


  • Faceseal Fittings
  • Micro Weld Fittings
  • Compression Fittings
  • Weld Fittings
  • KF & NW Fittings

Chemical Products:

  • PVDF Pipe Valves & Fittings
  • PolyPro Pipe Valves & Fittings
  • Teflon Tubing

Clean Room Air Filtration:

  • HEPA Filters
  • Gas Phase Filters
  • High Efficiency 85 – 95% Filters

Since 1998, Critical Systems, Inc. (CSI) has been providing Gas Cabinet, Valve Manifold Boxes & Gas Abatement Systems (Gas Cabinets and Gas Scrubbers, etc.), and Orbital Welding Rental, Lease, Repair and Training Services related to process tool facilitation for Semiconductor, Biotech, Pharmaceutical and related industries. Company headquarters are in Boise, ID USA, with additional locations in Shrewsbury, PA USA – Draper, UT USA – and our new European Sales and Service center in the Netherlands.