Ultraflo 400-422 Series

Ultraflo proudly offers the 400/422 Series general service butterfly valve. This economical, resilient seat valve is available in a wide variety of materials and provides a bi-directional pressure rating of 150 psi. Undercut discs, rated for 50 psi and requiring less operating torque, are also available. Precision machined to close tolerances and constructed of high quality materials, the 400/422 Series delivers long service life, ease of operation and maintenance, and reduced cost. Valve sizes are from 2 – 24” .

Ultraflo’s resilient Seat is the heart of all 400/422 Series valves. This seat offers lower torque and provides complete isolation of the line media from the valve body. The seat incorporates a dovetail retention system ensuring positive alignment and ease of assembly. All 400 Series seats include a flange seal molded into the seat face providing a positive seal with all popular flanges. Valves installed in dead end service (downstream flange removed) are derated to 75 psi for 2”–12” valves, 50 psi for 14”– 24” valves.


The primary seal is formed by an interference fit between the disc hub and the seat flat. The secondary seal is an interference fit between the stem and seat stem hole. These seals prevent line media from coming into contact with other valve components. Ultraflo’s Disc edge is CNC machined and hand polished to produce bubble tight shut off, minimum torque and longer seat life. Discs are available in a variety of materials and custom coatings. The Stem is constructed of 17-4 ph Stainless Steel for high strength and includes industry standard connections for actuator mounting. The Upper Stem Bushing absorbs operator side thrusts, provides precision alignment to ensure less wear and lowers operating torque. The Lower Stem Bushing eliminates gaulding and frozen stems. Both upper and lower bushings are heavy duty non-corrosive thermoplastic polymer. A Stem Packing prevents external contaminants from entering the stem bore. The one-piece Body is offered in wafer or lug style. All 400/422 Series valve bodies are designed to fit between ASME/ANSI 125 or 150 lb. flanges. Body Recesses accommodate lightweight flanges. All sizes of Cast Iron, Nodular Iron and Aluminum bodies have a CNC machined Top Plate with standardized drilling for total actuator and operator interchangeability. A handle notch plate is supplied with the manual handle kit.


  • Size Range: 2″-24″ (50mm-600mm)
  • Body Style: Wafer, Lug
  • Temperature Range: -40°F to 400°F (-40°C to 204°C)
  • Pressure Ratings: Bidirectional: 150 psi – 50 psi
  • Body Materials: Cast Iron, Aluminum, Nodular Iron
  • Disc Materials: Investment Cast 316 Stainless Steel, Nodular Iron, Nylon Coated Nodular Iron, ENP/Nodular Iron and Aluminum Bronze. Custom disc coatings are also available.
  • Seat Materials: EPDM, Nitrile, Buna, FKM. Nitrile seats are available in FDA approved food grade white.
  • Applications: General Service
  • Stem Materials: 17-4ph Stainless Steel
  • 2 – 12” 400 Series wafer bodies are available in Cast Iron and Aluminum. 14 – 24” 400 Series valves are available in Nodular Iron only. All sizes 422 Series lug bodies are constructed of Nodular Iron.