Welcome to the Didion Separator Company

Didion Separator Company's Type DSL, DSU, and DST Separators are capable of removing 99% of all entrainment 10 microns and larger from gas, steam, air and vapor pipe lines without causing any significant pressure drop. We can custom design your steam separator / moisture separator / liquid separator for better efficiencies upon request.

Most steam separators / liquid separators are available from stock for immediate delivery, all others guaranteed 4 to 6 weeks. Special Order units may take a longer lead time due to material.

All standard 150# units are designed for 150 psig @ 500° F., and all standard 300# units are designed for 500 psig @ 650° F. All moisture separators have a built-in corrosion allowance for years of uninterrupted service. In addition, internal elements are constructed of stainless steel to enhance the life of the system.

All of Didion's Steam Separators / Liquid Separators, Exhaust Heads, Flash Recovery Vessels, Blow Down Separators, Fabricated Strainers and Skid Packages are also available in a variety of other materials as a special order. Standard steam separator / moisture separator / liquid separator designs can be customized to suit your unique design requirements. All moisture separators are painted with high temperature safety blue paint.

The Didion Separator Company is a division of Didion's Mechancial. A strong established company, Didion's Mechancial has been fabricating pressure vessels, piping, heat exchangers and other customized process equipment and machinery since 1977. We contract with Hartford Steam Boiler (HSB Global Standards), as a thrid party Authorized Inspection agency and hold the following ASME and National Board stamps:
Steam Separators

U - For the manufacturing of Pressure Vessels to ASME Sect. VIII, Div. 1

U2 - For the manufacturing of Pressure Vessels to ASME Sect. VIII, Div 2

S - For the manufacturing of Power Boliers to ASME Sect. 1

PP - For the Manufacturing of Pressure Piping to ASME Sect. 1 & B31.1

R - The National Board stamp for Repairs and Alterations to Code Stamped equipment

CE -  Used on pressure equipment certified in accordance with the European Pressure Equipment Directive (PED).

Over the years, Didion's Mechanical has produced over 2,700 A.S.M.E. stamped pressure vessels, boilers and heat exchangers that are registered with the National Board. Uncompromising quality fabrication standards are accomplished with state-of-the art equipment including in-house radiography, heat treating and machining capabilities for our moisture separator / liquid separator fabrication.

A complete staff of engineering and design professionals, certified welders and N.D.E. technicians await the opportunity to serve your needs from initial design of your steam separators / liquid separators and other equipment to complete fabrication

liquid separators

The image above is a 108” I.D. Steam Separator with Inconel 625 centrifugal element; 750,000 lb/hr. @ 210 psig of steam;
Customer = CalEnergy, geothermal power plant.

Moisture Separators

    If you would like to provide your own pressure vessel,
     we will be happy to provide the internal separation
     element only,  in order to complete your moisture separators.