Val-Matic 1/2-3 Well Service Air Valve With Dual Port Throttling Device - Manual (Page 3)

INSTALLATION
The installation of the valve is important for its
proper operation. The valves must be installed
in the vertical position with the inlet down on the
discharge pipe between the pump and check
valve, see Figure 2. During closure, some fluid
discharge will occur so vent lines should extend
to a safe location or open drain for in-plant
installations. A shutoff valve should be installed
below the valve in the event servicing is
required.
THROTTLING DEVICE: The throttling device
should be screwed into the outlet of the air
valve. The outlet connection of the device
should be piped to a safe location or open drain.
Install the device with the adjustable screw in
the mid position.
If there is a sudden pressure spike in the pump
discharge line during pump startup, then throttle
the device closed until the pressure surge is
reduced. NOTE: Even when fully throttled,
there is still 5% flow area through the throttling
device.
If air is driven through the main check valve
during pump startup, then open the throttling
device further to allows a faster rate of air
discharge. A lock nut is provided to lock the
final setting.
CAUTION: Remove packing from
outlet and install valve
with “INLET” port down or
leakage will occur.
Figure 2. Pump Installation
2