Water Treatment
Plant isolation, filtration, and process water headers.
Butterfly Valve · AWWA C504 / C516
AWWA butterfly valves follow waterworks dimensions, stem standards, and torque requirements set out in AWWA C504 and C516 for potable water, transmission, and wastewater service. Worm gear operators for AWWA valves must meet utility torque margins, support buried installation with extension stems, and seal to IP68 for wet wells and vault service.
Application Foundation
An AWWA butterfly valve gear operator meets the torque, stem, and dimensional requirements of AWWA C504 and C516 waterworks valves. These standards define disc, seat, and operator torque criteria for potable water and wastewater, so the operator must deliver the specified break torque with the utility's safety margin and hold the disc on horizontal mains without creep.
Buried AWWA valves often need extension stems, position indicators, and IP68-sealed housings for vault and wet-well service. Size the operator from the AWWA torque table and valve datasheet, then match the ISO 5211 flange — commonly F16 to F25 on large bodies. Matson models M14A–M16 (2,500–4,400 N·m) suit many AWWA duties, with heavier units for the largest transmission valves.
Engineering Data
| ISO 5211 Flange | Typical Valve Size Band* | Common Valve Families | Matson Models Offering This Flange |
|---|---|---|---|
| F05 | Small bore | Ball, plug, small butterfly | M07 |
| F07 | Small–medium bore | Butterfly (wafer), ball, plug | M07, M10 |
| F10 | Medium bore | Butterfly, ball, plug | M07, M10, M12 |
| F12 | Medium bore | Butterfly (lug), ball, gate top-work | M12, M14 |
| F14 | Medium–large bore | Butterfly, trunnion ball, gate | M12, M14, M14A, M15 |
| F16 | Large bore | Butterfly (double flange / AWWA), ball, gate | M14, M14A, M15, M16 |
| F25 | Heavy / large bore | Large AWWA butterfly, high-pressure ball, large gate | M16 |
*Valve size band is indicative only — actual flange depends on the valve manufacturer's top-work, stem, and torque rating. Flange options and Matson single-stage model data are from the Matson worm gearbox catalog (M07–M16, 200–4,400 N·m). Two-stage and electric-actuator series extend up to 160,000 N·m. Confirm the exact flange against your valve datasheet.
| Variant | Actuation | Typical Torque Driver | Mounting Interface |
|---|---|---|---|
| AWWA C504 | Quarter-turn 90° | AWWA torque table + ΔP | ISO 5211 F16–F25 |
| AWWA buried | Quarter-turn (geared) | Buried + extension stem load | ISO 5211 F16–F25, IP68 |
General selection guidance by torque demand and top-flange interface. Match the required break-to-open torque (with safety factor) and the valve top-work flange to a Matson model; exact model and dimensions are confirmed against your valve datasheet — request a datasheet.
Per-model specifications (dimensions, weights, drive bushing details): available on request — request a datasheet. Send your valve tag, bore, pressure class, and required output torque and our engineers return a model recommendation with the matching ISO 5211 interface.
Operation
Use the AWWA C504/C516 torque values and the utility's safety factor for sizing.
Specify extension stem length, bury depth, and IP68 sealing for buried installations.
Confirm the larger ISO 5211 flange (F16–F25) and stem interface against the valve datasheet.
Engineering
By Industry
Plant isolation, filtration, and process water headers.
Buried distribution and transmission mains.
Headworks and process isolation with corrosion protection.
Vault and pump-station isolation valves.
Manufacturing Partner
Operators sized against real valve torque charts and top-work drawings — not generic catalog tables.
Standard and adapter mounting for current and legacy valve patterns without field rework.
Private label, locked BOM, and volume pricing for valve OEM and distributor programs.
STEP models, center-height tables, and export certificates issued with the commercial quote.
Common Questions
An AWWA butterfly valve gear operator is a worm gear unit sized to the torque and stem requirements of AWWA C504 or C516 waterworks butterfly valves. It delivers the specified break torque with a utility safety margin, holds the disc on horizontal mains, and supports buried service with extension stems and sealed housings.
AWWA C504 is the American Water Works Association standard for rubber-seated butterfly valves used in waterworks service. It defines body, disc, seat, shaft, and operator torque requirements. Operators for C504 valves are sized to the standard's torque values so the valve meets waterworks performance and acceptance criteria.
Yes, AWWA butterfly valve operators are regularly supplied for buried service with extension stems, position indicators, and IP68-sealed housings for vaults and wet wells. Specify the bury depth, extension stem length, and stem interface so the operator and stem assembly match the installation.
Yes. ValveWormGear supplies worm gear operators for AWWA C504/C516 butterfly valves in water transmission, distribution, and wastewater, including buried service. Provide the valve standard, bore, pressure class, and bury depth so we assign the correct torque margin, coating, and stem interface.
Match the operator to the AWWA C504/C516 torque table and the ISO 5211 flange (often F16–F25 on large bodies). Matson models M14A–M16 (2,500–4,400 N·m) suit many AWWA duties, with heavier units for the largest valves. Send your valve datasheet for sizing.
Send your AWWA valve standard (C504/C516), bore, pressure class, and bury depth. We size a worm gear operator to the AWWA torque table with the correct stem interface and sealing.