Liquid Controls V-7 Valves - Manual (Page 5)

5
V-7 Valves - Installation
When ordered with a new metering system, the V-7
Series Valve is supplied mounted to the outlet side of the
meter as shown to the right. A liquid line must be
connected to the flange on the outlet side of the valve or
to the accompanying air check valve. The flange
connection on the V-7 valve is 1½” or 2” BSPT or NPT or
weld type.
New Installations
Retrofit Installations
Depending on the existing configuration, adding a V-7
Valve may require modification of the outlet piping.
After the internal pressure is relieved from the system,
the outlet line can be disconnected from the meter. The
new valve assembly can then be connected to the outlet
side of the positive displacement meter.
Installing the Valve
V-7 valves can be mounted in four possible positions
(Figures 8a-8d) depending on the required direction of
the valve output. The output can be front or back, top or
bottom. Standard valve position is configured with a top
outlet connection for flow from left to right and a horizontal
handle with an offset linkage assembly.
Positioning the Seal Ring
Each V-7 Valve is supplied with a seal ring. The inner
seal lip faces the valve housing and not the meter. Place
the seal on the valve and mount the valve to the meter
using the four bolts provided. Thread the four bolts into
the meter housing but do not tighten.
! ! ! ! ! WARNING
Relieve Internal Pressure
All internal pressure must be relieved to zero pressure before
disassembly or inspection of the meter or any of the meter accessories.
Serious injury or death from fire or explosion could result from
maintenance of an improperly depressurized and evacuated system.
Figure 8a:
Standard Top
Facing Outlet
Figure 8b: Rear
Facing Outlet
Figure 8c:
Bottom Facing
Outlet
Figure 8d: Front
Facing Outlet
Figure 7: V-7 Valve installed