Definition
DynaTorque AWWA grade
actuators are constructed to the rigorous requirements of AWWA specification
C504. Actuators in this category are totally enclosed, weatherproof, and
permanently lubricated. These units are suitable for use in above
ground, buried, and submerged service applications with handwheel, chainwheel,
or operating nuts
Construction
Unit housings and covers are
cast iron, worms are heat-treated carbon steel, worm wheels are cast manganese
bronze, input shafts are carbon steel with yellow zinc plating, shaft and worm
seals are Buna-N rubber, housing-to-cover seals are Buna-N,
bushings are oil impregnated copper nickel steel alloy.
Notes:
1. Handwheels listed are
recommended sizes to produce full rated torque with the rim effort listed. The
formulas listed below will assist you in determining alternate handwheels
sizes and rim pull requirements based on your application.
To Find: Handwheel
diameter for given output torque at a given rim effort
Divide
the output torque by the mechanical advantage and multiply by 2
The
divide this result by the handwheel rim effort.
To Find: Rim Effort
for a given output torque with a given handwheel diameter.
Divide the
output torque by the mechanical advantage and multiply by 2
Then divide
this result by the handwheel diameter.
2. Handwheels are not included
as part of the operator part number or price.
