Emerson TESCOM - Page 13

13
Installation Manual
Content
December 2020
Installation Manual
TR000238ENUS-01_12-20
4. The valve parts can now be removed from the regulator body by turning the seat
retainer and/or back cap counterclockwise until it is free of the regulator body.
CAUTION
Some TESCOM models have valve parts that are held in place by the use of left-handed
threads.
When removing valve parts from a regulator that has a back cap, care must be taken
to insure the main valve stem remains vertical. If the main valve stem is not removed
correctly, parts may remain in the regulator.
5. To disassemble main valve assembly and/or valve, clamp valve in smoothed jaw vise.
Clampingshouldbedoneonats.
CAUTION
Care must be used to not damage valve. Special service tools may be available to aid in
the disassembly of the main valve assembly in certain models. Please contact your local
TESCOM representative to learn more.
NOTE: Several TESCOM regulators are supplied with internal filters. They will be located
either in the inlet port or in the main valve area of the regulator. In each case, they should
be removed and replaced before reassembly.
Reassembly
The regulator is reassembled in the reverse order of disassembly, observing the following
precautions. Please reference the Bill of Material and Assembly Drawing for the correct
locationofreplacementpartsandcorrecttorquespecications:
1. Inspect all parts and replace those worn or damaged with TESCOM replacement parts.
2. All parts should be cleaned to the cleanliness level required for safe operation with
themediaandsystemtheywillbeusedin.Allpartsintheowstreammustbefreeof
particles which could prevent proper seating of the main valve.
3. Applyathinuniformcoatingofuorocarbongreasetoanyorallofthefollowing
parts: indentation of spring button, threaded portion of adjusting screw, entire
threaded area of the bonnet, all O-rings, all threaded parts internal to regulator.
NOTE: Do NOT apply any type of grease to the inlet or outlet connections.
5. Valve seats must be installed with the chamfered side towards the main valve.
6. Standard Regulator with Control Knobs - The body and bonnet are best joined by
holding the bonnet assembly open end up and dropping all required items into place
one at a time. The last item to be placed in the body of most all of TESCOM regulators
is the piston sensor. Place all O-rings and back-up rings that are external to the piston
sensor in the body before placing the sensor in place. O-rings should always be
installed before back-up rings. The bonnet and body may now be attached. This is
best done by holding the body in one hand and the bonnet in the other. Tilt the body
ata45°angleandthenattachthebonnetbyscrewingitintothebodyrmly,hand
tight.
Regulator should then be placed in vise and bonnet re-torqued to correct
specications.SeeAssemblyDrawing.
3.2.5