Gasket(s)
Seal Ring
Valve Stem
Bimetal Element
Over-expansion and Return Springs
Screen
Valve Seat
Body, Cover
Disassembly/Reassembly (to reassemble, follow procedures in reverse)
Part & No.
Cap Nut 16
Cap Nut Gasket 21
Locknut 15
Cover 2
Cover Gasket 17
Adjusting Screw 4
Seal Ring 13
Snap Ring 11
Washer 6
Return Spring 10
Thrust Plate 20
Washer (5 sets) 6
Bimetal Element
(5 sets of 2 discs) 5
Spring Pin 12
Screen 14
Spring Guide 19
Overexpansion Spring 9
Valve Seat 7
Valve Seat Gasket 8
Parts Inspection Procedure
Check for warping and damage
Check for scratches and wear
Check for scratches and wear
Check for wear and deformation
Check for wear
Check for clogging, corrosion or damage
Check for rust, scale, oil film wear or damage
Check inside for rust and scale
Disassembly
Remove with a spanner or socket
wrench
Remove and clean sealing
surfaces
Remove with a spanner or socket
wrench
Remove with a spanner or socket
wrench
Remove and clean sealing
surfaces
Screw in by using a flat-head
screwdriver
Remove
Remove from the valve stem
Lift up and off from the valve stem Slide onto the valve stem
Remove from the valve stem
Remove from the valve stem by
lifting up and off
Lift up and off from the valve stem Slide onto the valve stem
Remove the bimetal element from
the valve stem by lifting up and off
Remove from the valve stem only
if damaged
Remove without bending
Remove from the trap body
Remove from the trap body
Remove with a socket wrench,
being careful not to scratch the
sealing surfaces
Remove and clean sealing
surfaces
̶ 12 ̶
Reassembly
Consult the table of tightening torques
and tighten to the proper torque
Replace with a new gasket if warped or
damaged
Reattach and tighten
Line up spring pin in valve stem with
grooves cut into the adjusting screw as
cover is placed onto the body; consult
the table of tightening torques and
tighten to the proper torque
Replace with a new gasket; coat
surfaces with anti-seize
Be careful not to damage the seal ring
during reassembly
Replace with a new seal ring if damaged;
coat with heat resistant silicon grease
Reattach to the valve stem
Place on the valve stem
Slide onto the valve stem
Reassemble the bimetal elements,
paying special attention to the proper
orientation (the TLV marks on the
outside, see Exploded View, p. 6)
Replace with new if damaged
Reinsert without bending
Reinsert in the proper orientation
Reinsert
Consult the table of tightening torques
and tighten to the proper torque; be
careful not to scratch seating surfaces
Replace with a new gasket; coat
surfaces with anti-seize