10
TESCOM™ Safety, Installation, Operations & Service Manual
Content
December 2020
Installation Manual
TR000238ENUS-01_12-20
NOTE:
Two-stage regulators have portions on both ends of the regulator body that
must be removed. It is TESCOM’s recommendation that two-stage regulators be
returned to the factory for repair.
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
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 or
hold with pliers. Clamping should be done on flats.
CAUTION
Care must be used to not damage valve.
WARNING
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 specifications:
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 flow stream must be free of
particles which could prevent proper seating of the main valve.
3.
Apply a thin uniform coating of fluorocarbon 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.
WARNING
Do not apply any type of grease to threaded internal parts of regulators that come
standard with metal to metal diaphragm seals. Regulators with metal to metal diaphragm
seals have Metal listed as the diaphragm material on their installation drawing.
NOTE:
Do
NOT
apply any type of grease to the inlet or outlet connections.
4. Valve seat must be installed with the chamfered side towards the main valve.
5. Standard Regulator with Control Knob - 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 bonnet will be the diaphragm. It can be
centered on the seating surface of the bonnet before the body assembly is inverted
and screwed into the bonnet firmly – hand tight. Regulator should then be placed in
vise and bonnet re-torqued to correct specifications. See Assembly Drawing.
3.1.5
