Van Air Systems Mist Eliminator - Manual (Page 4)

PAGE 4 © 1998 VAN AIR SYSTEMS INC. 2950 MECHANIC STREET, LAKE CITY, PA 16423 PRINTED IN THE U.S.A.
SECTION 4 INSTALLATION
4.1 ELEMENT INSTALLATION (VME-5000 and larger)
Models VME-5000 and larger were shipped WITHOUT the
element installed. The element must be installed in the vessel
before operation. All other models were shipped with the element
installed inside the vessel.
IMPORTANT
THE ELEMENT MUST BE INSTALLED IN THE VESSEL BEFORE
OPERATION.
CAUTION
USE CAUTION WHEN REMOVING THE TOP OF THE VESSEL.
THE TOP FLANGE/HEAD IS VERY HEAVY.
PRECAUTIONS MUST BE TAKEN TO PREVENT THE VESSEL
FROM TIPPING OVER WHEN IT IS IN THE UPRIGHT POSITION.
FAILURE TO HEED THESE CAUTIONS COULD RESULT IN
SERIOUS PERSONAL INJURY AND DAMAGE TO THE UNIT.
To make element installation easier, the vessel can be laid down in
the horizontal position. If attempting to install the element while the
vessel is in the upright position, provisions must be taken to prevent
the vessel from falling over.
The top flange/head and the inlet connection of the vessel must be
removed to install the element. Use caution when removing the top
of the vessel. The head and flange assembly is very heavy. Do NOT
discard the fasteners or gasket.
IMPORTANT
WHEN HANDLING THE ELEMENT, EXTREME CARE MUST BE
TAKEN TO PREVENT DAMAGE TO THE ELEMENT MEDIA.
DAMAGE TO THE ELEMENT WILL CAUSE EXCESSIVE
CARRYOVER.
Locate and uncrate the element, fasteners and gasket. Use care
when handling the element. Damage to the element must be
prevented to ensure proper operation. Damage to the element
media will cause excessive carryover.
Attach the element to the internal flange on the flange/head
assembly. Use the fasteners and gasket provided.
Carefully place the element and flange/head into the vessel.
Reattach the flange to the vessel using the original fasteners and
gasket. If the gasket was damaged during removal it must be
replaced.
4.2 LOCATION
This vessel can be installed indoors or outdoors.
The vessel should be located on a level surface capable of with-
standing the weight of the unit. The weights of the units are listed in
SECTION 3.1. The weights listed are for the vessel only. Add the
weight of the element for the total weight of the unit.
The location should allow for the removal of the element. The
clearance listed in Section 3.2 should be allowed above unit for
element removal. However, for the larger models, this distance
might not be possible in some installations. If the distance is not
available, allow enough space around the vessel so that it is possible
to remove it from the piping and lay it down.
4.3 MOUNTING THE VESSEL
It is recommended that the vessel be attached to the mounting
surface to prevent it from falling over. This is particularly important
for models VME-1250 and larger. Mounting pads are provided on the
footring or legs of the vessel. Reference SECTION 3.2 for dimen-
sions and location.
4.4 PIPING AND ANCILLARY EQUIPMENT
Once the desired location has been determined and the vessel
mounted in place, the inlet and outlet piping can be connected to the
unit.
Make sure that all piping to the dryer is free of dirt and pipe scale.
Excessive amounts of dirt or scale will be captured by the element,
causing it to become plugged.
IMPORTANT
MAKE SURE THAT THE PROCESS PIPING IS PROPERLY
CONNECTED TO THE UNIT. THE INLET CONNECTION IS THE
TOP FLANGE ON THE VESSEL.
The inlet connection is the top flange. Make sure that the piping to
the vessel is constructed to allow for the removal of the vessel top
flange/head for element replacement. For models VME-1250 and
larger, it may be necessary to construct the inlet piping so that the
vessel can be removed from the process line.
An isolation valve should be installed at the inlet of the vessel. Make
sure that the valve is located before any connections in the process
piping that will require disconnection for the removal of the vessel
top/head.
If desired a bypass loop with a bypass valve can be installed around
the vessel. This will allow maintenance to be performed on the
vessel without disrupting the process flow. NOTE: When the process
is directed around the vessel, the process gas is NOT treated.
An isolation valve should be installed at the outlet of the vessel. For
models VME-1250 and larger, it may be necessary to construct the
outlet piping so that the vessel can be removed from the process
line.
Use pipe supports on all piping runs as necessary.
4.5 PRESSURE DIFFERENTIAL GAUGE
To monitor the condition of the element in the vessel, a pressure
differential gauge should be installed. An 1/8" NPT connection is
provided on both the inlet and outlet connections of the vessel.
A pressure differential gauge, model PD-7 is available for installation
on the vessel. The use of the PD-7 or a U-Tube manometer is
recommended. The normal operating pressure differential across
the vessel will vary between 0.5 to 1.0 PSID. To ensure a proper
reading, the differential pressure indicating device must be very
accurate. The use of two pressure gauges and subtracting the
difference between the readings is NOT recommended. The element
will require replacement at 3 PSID. If the device used to measure
the differential is not accurate, the element might be replaced
prematurely or beyond the point of efficiency.
Install the PD-7 or pressure differential measurement device on the
vessel. Follow all instructions provided with the device. An angle
clip was provided on the front of the vessel for attaching the PD-7.
If a PD-7 was not purchased with the unit, one can be ordered by
contacting your local VAN AIR representative or the factory.
PD-7 P/N 84-0841