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Latest News

  • AF-36C & AF-51C Cryogenic Ball Valves passed BS 6364 Cryogenic Test

  • This testing requires immersion in liquid nitrogen @-321F for one hour, then (20) cycles at full rated pressure (2000 psig) with helium as a test gas, then valve is tested for both external & across-valve leakage with helium...
    AF-60 Sanitary & High Purity Ball Valves for gas or processing cooling water in Semiconductor, pharmaceutical or food Industry.
    Spring Return Handle Ball Valves Spring Return Closes  valves when not held open providing safety for applications that requires positive closure. Locking device lock the valve in preferred position.
    AF-51F 150 ~ 300#  Flanged Direct Mount Ball Valves Firesafe certified to API 607 7th Edition.
    AF-35 2000 PSI  3-pc Direct Mount Ball Valves Firesafe  certified to API 607 7th Edition.
    AF-291 6,000 PSI High Pressure Ball Valve Seal Welded, ISO 5211 mounting, Delrin Seat. Locking Handle or Bare Stem for Actuation. Option: Firesafe to API 607 5th Edition.
Contact Anson for details.



Anson Flow Corp.
7F-2, No. 408, Nantun Rd., Sec.2, Taichung City 408 438, Taiwan

Phone: +886 4 2472 0998
Fax:     +886 4 2473 4240
E-Mail: sales@ansonflow.com

Quality Investment Castings
for a wide variety of OEM markets

Investment casting has, with no doubt, earned it's place in manufacturing. The lost-wax process has proven to be a cost effective way to produce metal components. Parts can be reduced in weight, tolerances of 0.010" or 0.13mm per inch held, The average micro finish is 125 rms, with the range for the process being between 60 and 120, depending upon the limitations of the metal, and expenses and time involving machining and finishing reduced or eliminated. 

Our commitment is to produce high quality castings. It takes a well planned facility, the right equipment, and well trained people dedicated to quality to achieve consistent results.  It can be always told in our final product. The lost-wax process provides unique opportunities for engineers and designers. Intricate structures can be created with minimum or no secondary machining operations. 



      50 pcs to 10,000 pcs


  • Prototype delivery as little as 3 weeks


Poured: iron, nickel and cobalt base alloys:


  • Carbon & Low Alloy Steels
  • 400 Series Stainless Steel
  • 300 Series Stainless Steel
  • Precipitation hardening Stainless Steel
  • Tool Steels
  • Cobalt Base Alloys
  • Nickel Base Alloys Alloy Cast Iron


    Up to 45 kgs. depending upon part configuration


Up to 18" x 18" x 18", to 24" length in some cases.


Lost-Wax process, shell method


We employ the latest production and testing technology to assure high quality at a competitive price. Customers can find every necessary special service: pattern-making, heat treating, machining, CAD/CAM, rapid prototyping, physical and chemical analysis, magnetic particle penetrant inspection, x-ray, dye checking, microstructure evaluation, mechanical and non-destructive testing, alloy control, lab services, microscopic analysis testing, design and layout services.

  • Compressors
  • Valves
  • Pumps & Impellers
  • Propellers
  • Automotive
  • Food Processing
  • Hand Tools
  • Machine Parts
  • Hardware
  • Golf Clubs
  • Marine Hardware
  • Marine  Parts
  • Medical
  • Packaging
  • Pneumatic Tools

Investment Casting Process

Wax which conforms to complex cavities and intricate exteriors is injected into precisely tooled dies which, while accounting for both wax expansion and metal contraction, yield finished tolerances of ?.0057.

The resulting wax patterns are assembled on a tree, or sprue, which provides the gates through which the molten metal will be poured.


The tree is dipped repeatedly into ceramic investment, strong enough to handle molten metal but pourous enough to allow air to escape, thus preventing voids.

After the wax is burned out of the ceramic mold, hence the term "lost wax," molten metal is poured into the resulting pattern at up to 3,000F.


The heat of the casting alters the ceramic chemistry so the mold crumbles away after cooling. Gates are then cut off and the part is cleaned.

Finished parts are checked for allowable tolerances. Non-destructive testing, X-ray, magnetic particle and penetrating dye inspections are available.



Final Quality Inspection: Specialized technician examines dimensions, hardness and microstructure by hardness test, tensile test, & impact test to ensure quality conformance to specification. Material Certificate & Inspection Report is issued accordingly.