Ultraflo 410-412 Series

Ultraflo is proud to offer the 410/412 Series large diameter, resilient seated butterfly valve. The 410 model, a wafer style body, is available in sizes 24”–36”. The 412 model, a double flanged style body, is available in sizes 24”– 48”. Both models have a bi-directional, bubble tight shut-off pressure rating of 150 psi. 410/412 Series valves feature high Cv ratings, full isolation of body parts from line media, heavy duty construction, reliability and long service life.

Valve Bodies are offered in Cast and Ductile Iron, Cast Steel and Stainless Steel and comply with ASME/ANSI 125/ 150 flange drilling standards. 412 models may be bolted to allow downstream flange removal or cross-bolted for high resistance to line media stress.

V-type packing design is self-adjusting with bi-directional sealing to prevent external substances from entering the stem bore. 412 models feature externally adjustable packing which is ideal for vacuum applications.

412 model valves have a bronze packing gland that allows for field adjustment of stem packing without the need to remove manual operators or actuators. This feature, combined with the self-adjusting stem packing, greatly extends the service life of the valve.


Ultraflo’s resilient Seat is the heart of all 410/412 Series valves. The seat design offers lower torque and complete isolation of the line media from the valve body. A tongue and groove seat retention system ensures 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. 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. Taper Pins with O-ring seals are mechanically locked for maximum torsional capacity and vibration resistance. The one-piece heavy duty, high strength Stem includes industry standard connections for actuator mounting. The heavy wall bronze Stem Bushing (410 models only) absorbs operator side thrusts. Upper and Lower Stem Bearings (412 models only) provide precision alignment to ensure less wear and lower operating torque. The Thrust Bearing eliminates disc displacement due to stem and disc weight. All size bodies have a CNC machined Top Plate with standardized drilling for total actuator and operator interchangeability.


  • Size Range: 24″-48″ (600mm-1200mm)
  • Body Style: Wafer, Double Flanged
  • Temperature Range: -40°F to 400°F (-40°C to 204°C)
  • Pressure Ratings: Bidirectional Bubble-tight Shut-Off: of 150 psi
  • Body Materials: Cast Iron, Ductile Iron, Cast Steel, and Stainless Steel
  • Disc Materials: Ductile Iron, Nylon 11 Coated Ductile Iron, ENP Ductile Iron, Aluminum Bronze, 316 Stainless Steel, Monel and Hastelloy C
  • Seat Materials: EPDM, Buna, and FKM
  • Stem Materials: Coated Carbon Steel, 304 Stainless Steel, Monel and Hastelloy C