Keep in mind that the Humat 4-way Hydrant Valve is the simplest to use
and maintain appliance available today. The text of this sheet of
operating hints and maintenance procedures are for those persons
misconstrued as making our valve complicated. We offer these words to
help those of you who must write your departments technical directives.
The valve is attached to the hydrant by holding the carrying handle with the
right or left hand, centering the valve on the male hydrant thread and
turning the valve's steamer swivel in a clockwise direction with the other
hand. Before tightening the valve on the hydrant, determine what position
would be best for the most effective fire fighting. For Example: If you are
laying in to a fire which is to you left as you face the hydrant, you should
rotate the valve so that the small chamber is up instead of down. This will
avoid a reverse twist in the pre-connected line. The valve steamer
connection should be tightened and the hydrant charged as directed.
On the fire ground with the valve connected to the hydrant, you have more
leverage and the valve can be operated easily when the butterfly is
properly adjusted. To open the butterfly valve, pull the operating handle
towards the closed position with one hand while pressing on the latching
pin with the other hand. The latching pin will easily disengage from its
locked closed position. Then, while guarding the operating handle with
one hand, bump the handle with the heel of the other hand toward the
open position. Because of the design of the resilient seal used with the
butterfly, friction will then hold the valve closed. Once the seal is broken,
the handle can be moved easily throughout the 75 degrees of movement
from fully closed to fully open position. To close the valve, move the
operating handle toward the closed position slowly to prevent water
hammer (as with any quarter turn valve). As you approach the fully closed
position, more pressure is required to close the valve (you are
compressing the resilient seal against the interior wall of the valve).
Finally, when the latching pin is almost in the closed-locked position, give
a brisk tug toward the closed position and the latching pin will engage in
the closed-locked position on the latching plate.
When the butterfly is properly adjusted, it may seem to be difficult to open
and close the valve when it is not mounted on the hydrant. Even though
properly adjusted, you may wish to reduce the latching pressure
temporarily for purposes of demonstrating the valve functions in a
classroom situation. This is easily accomplished by loosening the
latching plate clamp and repositioning the plate to suit your needs. Upon
completing the training session be sure to readjust the latching pressure
as per instructions.
Top of Page