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Butterfly Valves

Resilient Seated Butterfly Valve - 900/922 Series

DynaQuip 900/922 Series butterfly valves are designed to provide years of rugged durability at a competitive value. Built for HVAC, utility, commercial and general industrial applications and media, these valves offer many more years of performance over lightweight throwaway valves. This valve can be automated – see our DynaFly 90F/92F series. Please select ‘Search by Specification’ to narrow product results for a specific application.

Series Options:

  • Wafer Style (900) or Lug Style (922) Bodies
  • Available Body Material: ASTM A536 Ductile Iron
  • Available Disc Material: Ni-Coated ductile iron, 316 Stainless Steel, Aluminium Bronze
  • Available Seat Material: Buna-N, EPDM, PTFE/EPDM, Viton®
  • 200 PSI CWP 2-12”
  • Temperature range: -40°F to 392°F (Dependent on seat material)
  • Available with: Bare Stem, Locking Handle, Gear Operator, Electric or Pneumatic Actuator (DynaFly)

Key Benefits

  • ISO 5211 mounting patterns and square stems for ease of actuation.
  • Cartridge style elastomer seat provides a positive seal without the use of flanges.
  • 200psi rating for valve size 1.5” to 12”.
  • Secondary O-Ring provides further prevention of stem leakage.
  • Stem retainer plate ensures blowout protection.
  • Precision profile disc provides bubble-tight shut-off and assures minimum torque and longer seat life.
  • Smooth finished disc flats that prevent leakage into shaft areas.
  • Extended neck
  • No taper pins on the disc to ensure trouble-free service and better flow.
  • Graphite-reinforced PTFE stem bushings provide low torque and long cycle life.
  • Lug style valves shall be suitable for dead end service to full rated pressure in in preferred flow direction: 200psi unidirectional; 100psi bi-directional
  • Vacuum service capable 1.5” – 12” to below 10 microns

Valve Details:
Body - Lug style has drilled and tapped lugs meeting ANSI 125/150 flange standards. Wafer body has locating holes at top and bottom.

Disc – Smooth finished Disc Flats align with Seat Flats to give a highly efficient seal which helps to prevent leakage into shaft areas. Precision machined and hand polished for positive seal with contoured edges for lower operating torque plus increased seat life. Comes in ductile iron, 316 stainless steel.

Seat – The Phenolic backed seat is non-collapsible, stretch resistant, and blowout proof to provide the following advantages:

  • The movement of the elastomer against the body assures a completely dry back.
  • Wide flange=face sealing area provides a tight flange-to-valve seal without the use of gaskets
  • The controlled-torque Seat allows tight shut-off with minimum movement of the seat material to reach the closed position in the center of the seat for ease of actuation.
  • The wide sealing area around the shaft provides a positive self isolating the shaft form the media.

Top Plate Standard ISO 5211 - Accommodates all types of actuators; handles, gear operators, electric and pneumatic actuators.

Stem - Machined from 416 stainless steel to eliminate twisting of stem. Gives direct disc control of full or partial product flow. Square stem connection gives positive attachment for automating.

Stem Bushing - Composed of Acetal, stem bushings absorb operator side thrust and help prevent side-load.

Shaft Weather Seal - Prevents environmental intrusion of elements, helps to combat side load torque.

O-Ring Seal – Provides further prevention of stem leakage. Matches seat material of EPDM or Buna-N.

Flange Seal/Seat Face - Resilient seat which provides an absolute seal to all flanges within specifications. No other gaskets required.

Product Details