Hale Master Intake Valve - Manual (Page 6)

4
M
ASTER
I
NTAKE
V
ALVE
The valve is available configured for
manual operation using a panel mounted
handwheel (MIV-M) or for electric
operation using a panel mounted switch
(MIV-E) for remote control operation.
Whether the manual or electric operated
valve is installed, lights on the panel placard
will illuminate to indicate if the valve is
open, closed or traversing from one position
to the other.
Also provided with the electric valve is a
manual override handwheel that permits
valve operation from outside the operator
panel. No special tools or parts removal is
required.
The valve gear actuator, manual or electric,
is designed to move the valve disc from the
fully closed to full open position using 10
turns of the handwheel. The electric
operated valve will cycle from the fully
closed to full open position in no less than 3
seconds therefore meeting NFPA
requirements. The matched gear set is
designed to permit operation with minimal
torque even at high flows and pressures.
The design of the gear actuator also
permits the valve to be placed into a
partially open position if it is necessary to
gate the intake flow.
Master Intake Valves are provided with a ¾
inch NPT suction hose priming port. This port
is located near the relief valve mounting
flange on the valve body. During pump
operations when an MIV is installed on the
main pump suction it may be desirable to
pre-prime the suction hose so fire fighting
capabilities are not lost when switching from
tank to draft operations.
Since the valve mounts behind the operator
panel, between the suction tube extension
and the suction tube, or in-line for front and
rear suction piping, there is less panel
clutter, obstruction of valve handles or
chance for damage to the valve body due
to overhang beyond the apparatus running
board.
Figure 2. Component Part Identification (Manual Valve)
TO +12 VDC
POWER SUPPLY
AIR BLEEDER
CONNECTION
GEARBOX
GEARBOX SHAFT
EXTENSION
(76 AND 81 INCH
PANELS)
RELIEF
VALVE
SUCTION
EXTENSION ON
MIDSHIP PUMP
PANEL
PLACARD
OUTBOARD
PRIMING TAP
WATER DRAIN
CONNECTION
SUCTION
TUBE
HANDWHEEL
VALVE
DISC
VALVE
BODY