3A Unions

3A union is composed of 3A-13H HEXAGONAL NUT, 3A-14PRF WELD LINER, 3A-15TRF WELD MALE.

The materials are offered for Food, Dairy, Beverage, Meat Processing, Vacuum Processing, Pharmaceutical, Chemical, and many other industries.

Our products have earned the 3A symbol, which requires an annual assessment to make certain each product conforms in all respects to the published standard

  • Material grade:
    • SS304, SS316, SS316L
  • Size range:
    • 3A Unions and Adapters: 1/2″, 3/4″, 1″, 1.5″, 2″, 2.5″, 3″and 4″.
    • 3A Ferrules: From 1/2″ up to 12″.
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SMS Unions

SMS union is composed of SMS-13R ROUND NUT, SMS-14 WELD LINER, SMS-15 WELD MALE and L TYPE SEAL. There are many different parts for SMS UNION such as LONG TYPE (SMS CL TYPE), SHORT TYPE (SMS BE TYPE) and SMS EXPANDING TYPE.

The materials are offered for Food, Dairy, Beverage, Meat Processing, Pharmaceutical, Chemical, and many other industries.

Our SMS Unions are normally made by casting, and forged material is to be requested.

  • Materials:
    • SS304, SS316 and SS316L
  • Size range:
    • DN25, DN38, DN51, DN63.5, DN76, DN104
  • SEAL:
    • EPDM, Silicon, Viton
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DIN Unions

DIN union is composed of DIN-13 ROUND NUT, DIN-14 WELD LINER, DIN-15 WELD MALE and SEAL.

DIN UNION includes DIN UNION IMPERIAL, ISO TYPE and DIN EXPANDING,
Standard – DIN 11850, DIN 11851, DIN11852

The materials are offered for Food, Dairy, Beverage, Meat Processing, Vacuum Processing, Pharmaceutical, Chemical, and many other industries.

  • Material:
    • SS304, SS316, SS316L
    • DIN unions that CSE offers are made by casting, but forged material can to be requested.
  • Size range:
    • DIN Unions: DN10, DN15, DN20, DN28, DN34, DN40, DN52, DN70, DN80, DN100, DN125 and DN150.
    • DIN Ferrules: DN10, DN15, DN20, DN28, DN34, DN40, DN52, DN70, DN80, DN100, DN125, DN150, DN200
  • Seal:
    • EPDM, Silicon, Viton
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IDF/RJT/Wine Valve UNIONS

These Unions are composed of 13 HEXAGONAL NUT, 14 WELD LINER, 15 WELD MALE and SEAL.

The Nuts include Round Nut, Hexagonal Nut and Blank Nut. Besides, we have WELD type and Expanding type, which can be requested.


The materials are offered for Food, Dairy, Beverage, Meat Processing, Vacuum Processing, Pharmaceutical, Chemical, and many other industries.

  • Material grade:
    • SS304, SS316, SS316L
  • Size range:
    • IDF Unions: 1″, 1.5″, 2″, 2.5″, 3″, 4″, 6″
    • RJT Unions: 1″, 1.5″, 2″, 2.5″, 3″, 4″, 6″
    • Wine Unions: DN40/43, DN50/53, DN60/63, DN70/73, DN80/83, DN100/103
  • Seal:
    • EPDM, Silicon, Viton
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