4
INSTALLATION
The installation of the valve is important for its proper
operation. The valve is capable of flow in either
direction but the maximum operating pressure can vary
with the location of the seat end. The words “SEAT
END” are marked on the valve flange. Actuators are
available for pressures up to the full rating in both
direct and reverse pressure orientations. Actuator
ratings will be indicated on the nameplate. Higher
operating pressures may require adjustment of the
closed position stop or a larger actuator; consult the
factory.
SUSPENDED SOLIDS SERVICE: For fluids
containing suspended solids, special orientations are
needed to prevent debris from collecting in the valve.
For horizontal installations (Figure 4), the valve should
be installed with the flow entering the seat end of the
valve and the shaft in a horizontal position with the
plug up when open. For vertical installations (Figure
5), the valve must be installed with the seat end up
regardless of flow direction.
CLEAN SERVICE: For both horizontal and vertical
installations, install in the direct pressure orientation
(pressure opposite the seat end).
AIR AND GAS SERVICE: Install valve in the direct
pressure orientation (pressure opposite the seat end).
Lubricate plug face with FDA approved silicone grease
such as Dow Corning #7 before installation. Gear
actuators are required for gas service applications.
PUMP DISCHARGE SERVICE: On all horizontal
pump discharge applications (Figure 6), the seat end
should be towards the pump.
BURIED SERVICE: Gear actuators are recommended
for buried valves to hold the valve in position and
provide multi-turn closure to prevent water hammer.
The valve should be installed with the shaft horizontal
and the actuator nut directed upwards. The valve box
or extension pipe should be installed so that the
actuator nut and extension stem turn freely.
FIGURE 4. HORIZONTAL PIPE WITH SOLIDS
FIGURE 5. VERTICAL PIPE WITH SOLIDS
FIGURE 6. PUMP DISCHARGE SERVICE
NOTE: Adjust and test valve prior to backfill.
(4 Seiten)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Kommentare zu diesen Handbüchern