ENGINEERING STANDARDS
Rosedale Products Inc.
3730 west liberty Road
Ann Arbor, MI 48103
IOM
7_4
38 Model OT8/OT82
50.DOC
N:\IOM\
Issue Date: 22MAR12
Revision:
Revision Date:
Specification No.
7.4.38
Page 3 of 8
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Rosedale Engineering Standards are the property of Rosedale Products, Inc. A Rosedale Standard or copy thereof shall no be distributed (except with express approval of
Rosedale Products, Inc.) to any individual or firm beyond the intended recipient firm or individual. Firms of individuals acting contrary to the above may be subject to
suit, ineligibility for continued or future employment, or removal from Rosedale’s “Approved Manufacturers and Specialty Contractors List”.
rated pressure. Many variables affect the torque required to operate the filter vessel without leaks.
These variables include the diameter of the bolt, type and number of threads, material type and grade,
condition of the nut bearing surface and lubrication of bolt threads and nut bearing surfaces. Other
factors such as the condition of the o-rings, o-ring material, viscosity of the fluid being filtered,
operating pressures, temperature, and the closure assembly tightening procedure must also be
considered.
Your Rosedale MODEL OT8/OT82 is now ready for operation!
II. Operation
Filter System Start-Up Procedure:
Prior to turning on the flow to the inlet service, please make the following checks:
1. Check inside filter unit to be sure basket and filter bag (if applicable) are
in housing and do not require cleaning or replacement. If necessary install a clean
filter basket and bag (if applicable).
2. Check that filter unit cover is securely fastened to housing. You are now
ready to open the flow to the inlet service line. Slowly open the inlet service line
approximately 25% of normal operational flow (open slowly as not to displace
filter bag inside the housing). After filter unit is pressurized and vented, slowly
open outlet service line unit valve until completely open. Complete opening of
inlet service line until desired flow rate is reached.
Once the desired service flow has been established, the filter will operate efficiently until dirty.
However, under no circumstances should more than 15 PSI Differential Pressure through the filter be
obtained. Operating the filter unit with a high differential may cause filter bags to rupture and/or cause
damage to filter system and downstream equipment.
To prevent excessive drop through the filter unit, regular inspection of the filter media is required.
Monitoring of differential pressure through the housing can be utilized as a means of determining
whether or not the filter media needs cleaning or replacement.
When it becomes necessary to clean or replace filter media, follow the procedure outlined below:
1. First close the flow from the inlet service line.
2. Close the flow to the outlet service line. (In some applications closing
flow to outlet is not required.)
3. Relieve the pressure from the filter unit.
