RelaDyne LubriMist DXT User manual

77740212 REV 2August 2020
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LubriMist®Model DXT
Oil Mist Generating System
Installation and Operating Manual
Revision History:
Rev 1
1. Added Vacuum assists as standard.
2. Updated drawings and BOM; 235-273 is not in M2M replaced by 77500843
fast ball pump 1:1 ratio.
3. Added LubriMist®

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LubriMist®Model DXT
Oil Mist Generating System
Installation and Operating Manual
Manufacturer
5615 W Fuqua St. B-201
Houston, Texas 77085
USA
Ph 713.464.6266
Fax [phone]
©2006 Lubrication Systems Company.
All Rights Reserved.
Reproduction and transmission by any means without express written permission is prohibited, except as allow under the
copyright laws.
The information contained in this document is subject to change without notice. The manufacturer makes no warranty of any
kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a
particular purpose. The manufacturer shall be not liable for errors contained herein or for incidental or consequential damages
concerning the furnishing, performance, or use of this material.
Printed in the United States of America.

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Installation and Operation Manual
Introduction:
A LubriMist®Oil Mist System is a centralized lubrication system that generates,
conveys and automatically delivers lubricant to bearings, gearboxes, chains and
sliding surfaces in various industrial machinery and equipment. The LubriMist®
Model DXT demisting tank is designed to separate suspended oil droplets from the
vented mist stream after the oil mist has been passed through the mechanical
bearing element being serviced. See the specific manual for the Oil Mist Generator
used to produce the mist for description and features of oil the mist generator being
used.
Description:
The “DXT” Demisting Tank is designed for use in systems serviced by LubriMist®Oil
Mist Generators of all sizes, and is available in models suitable for installation in
hazardous and non-hazardous locations.
The reservoir is fabricated from heavy gage-304 Stainless Steel plate and provides
the platform for mounting all other mechanical demisting components. The oil
reservoir provides the bulk oil supply necessary to maintain the proper working oil
level in the oil mist generator. It is equipped with an oil level gauge for monitoring
the reservoir oil level in the demisting tank reservoir. An air driven oil pump, with air
pressure control valve and air filter are provided for delivering make-up oil to the oil
mist generator. Oil fill cap and reservoir inspection cleanout plates are standard
features of the DXT reservoir.
Once returned to the DXT reservoir, an air blower is used to circulate the mist
through a high efficient coalescing filter element. This removes the remaining oil
particles from the air stream before being vented to atmosphere. As oil is coalesced
it falls into the oil reservoir for reuse in the oil mist generator or proper disposal.
The DXT is equipped with vacuum assist evacuation valves, which have the ability
of exerting a negative pressure on equipment bearing housings and return mist
header systems. Care must be taken to ensure that contaminates are not drawn
into the bearing or other mechanical element, causing premature failure. Reclaimed
oil in systems using a vacuum assist should be properly discarded, or carefully
monitored and inspected prior to reuse in the oil mist generator.

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Installation:
The DXT should be mounted below the lowest machinery element being serviced by
the Oil Mist Generator. If located indoors, the room should have cross ventilation
from a fresh air supply.
The return / drain header from the machinery being serviced by the Oil Mist
Generator should be installed to continually drain toward the DXT reservoir.
Connect the return header to the 2” NPT return mist connection located on top of the
DXT reservoir.
If the Oil Mist Generator (sold separately) has been mounted on the DXT reservoir,
insure that access for monitoring, operation and maintenance is maintained. The
DXT reservoir should be securely fastened to the floor or supporting structure.
An inlet air supply connection is required for oil pump operation. Connect the air
supply to the air pressure regulator / filter at the pump air inlet (1/4” NPT). If the Oil
Mist Generator has been pre-mounted to the DXT, a common inlet air supply may
be provided. Inspect the unit and locate the inlet air supply connection.
The pump oil discharge connection is 3/4” NPT. If the reclaimed oil is to be reused
in the Oil Mist Generator, provide a valved oil line from the oil discharge pump to the
oil mist generator. An in-line oil filter should be installed between the DXT and the
Oil Mist Generator. Oil filters are purchased separately. See the Operating Manual
for the Oil Mist Generator in use for specific instructions regarding pressurized oil
supplies. If the oil is not to be reused in the Oil Mist Generator, the pump oil outlet
connection should be piped to a location as determined and specified by the
purchaser for proper disposition.
The air blower requires an electrical service for its electric motor driver. Electric
motors are typically 3 HP and available in single and three phase. Others provide
motor starters and motor controls. See the motor nameplate or consult the
manufacturer for electrical requirements.

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Start-Up
To start-up and commission the Model DXT Demisting Tank, follow these steps:
1) Check and insure that all utilities are properly and securely connected.
2) Ensure that the coalescing filter element is installed and the filter housing cover
properly installed and secured with the spring-loaded latches. Ensure that the
blower discharge pressure bleed valve is in the full closed position.
3) If the DXT is to provide make-up oil to the Oil Mist Generator, fill the reservoir with
quality oil suitable for oil mist lubrication.
WARNING
Maximum DXT reservoir charge volume is 55 US gallons.
Do NOT Overfill.
4) Ensure that the vacuum vent gate valve is in the full open position.
5) Start-up and commission the Oil Mist Generator. See the O&M manual for the Oil
Mist Generator used for start-up instructions.
6) Turn on electrical power, and start the electric blower. Make note of the blower
discharge pressure and temperature. Normally the initial discharge pressure will be
zero, and the discharge temperature will be near ambient. However, as the
coalescing filter element becomes saturated with oil, pressure and temperature will
increase.

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CAUTION
Maximum discharge temperature is 160° F. If temperature rises to 155°
F open the air pressure bleed valve and reduce the air blower discharge
pressure.
7) When return header vacuum assist is used, close the vacuum vent gate valve to
achieve the desired return header setting. Monitor the user provided instrument
while making adjustments to the desired setting.
WARNING
If return header vacuum assist is utilized, mist venting may become
restricted if the blower operation ceases. Manual bypass and venting
configurations should be devised by the user for emergency use if mist
venting becomes inadequate when blower operation stops.
8) If the reclaimed oil is to be re-supplied to the Oil Mist Generator having an
automatic bulk fill feature, turn on the air supply to the oil pump and adjust the air
pressure regulator to read 40 - 55 PSIG. If the reclaimed oil is to be disposed,
manually turn on and adjust the air supply each time the reservoir is to be emptied.
9) Once the Unit is in operation and stable, no further adjustments are necessary.
Operation:
Once commissioned, the daily operation of the DXT requires no additional
adjustment. Except for systems operating with vacuum assist, the DXT reservoir is
designed to provide unrestricted venting should the blower cease operation.
See the Oil Mist Generator O&M manual for system operation.
Trouble Shooting
1.Normal operation is indicated with the air blower discharge temperature at less
than 160° F and no visible mist escaping from the air vent located through the oil
filter end cap.
2. If discharge temperature increases above 155 - 160° F, readjust the discharge
pressure bypass valve to lower the discharge pressure. Decrease discharge
pressure incrementally and allow the temperature to decrease and stabilize. If
temperature cannot be lowered without creating a visible mist emission, the filter
element has become loaded with particulate and must be changed. Filter elements
in units using vacuum assist may become loaded with particulate at intervals sooner
that the recommended filter replacement interval.
3. If over a period of use, small amounts of oil mist become visible in the air exhaust,
close the discharge pressure bypass valve. Monitor the discharge pressure to
insure that the discharge temperature does not exceed 155 to 160° F.

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Model DXT Parts List

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Model DXT Dimensions