Pressure Relief Valve (3 Bar); Air Vent (Automatic); Pressure Relief Valve (10 Bar) - Mitsubishi Electric EHST17D-VM2D Service Manual

From the previous page.
DISASSEMBLY PROCEDURE
12. How to remove the pressure relief valve/manometer/air
vent (automatic)
<Pressure relief valve (3 bar)>
(3) Remove the field piping from the pressure relief valve (3
bar). (Photo 12-4)
(4) Remove the pressure relief valve (3 bar) with the flare
joint using 2 spanners: one to hold the flare joint and the
other to turn the flare nut. (Photo 12-4)
(5) Remove the pressure relief valve (3 bar) using 2
spanners: one to hold the flare joint and the other to turn
the pressure relief valve (3 bar). (Photo 12-5)
(6) Eliminate loctite on the thread surfaces using remover.
(Photo 12-5)
• Before reinstallation, apply loctite over the thread
surface on the pressure relief valve.
• For more details about the loctite and the remover,
refer to Page 85.
<Air vent (automatic)>
(3) Remove the air vent (automatic) using 2 spanners: one
to hold the flare joint and the other to turn the flare nut.
(Photos 12-4)
<Pressure relief valve (10 bar) (Except for EHPT20X-
MHEDW model)>
(3) Remove the field piping from the pressure relief valve
(10 bar). (Photo 12-6)
(4) Remove the pressure relief valve (10 bar) with the flare
joint using 2 spanners: one to hold the flare joint and the
other to turn the flare nut. (Photo 12-7)
(5) Remove the pressure relief valve (10 bar) using 2
spanners: one to hold the flare joint and the other to turn
the pressure relief valve (10 bar). (Photo 12-8)
(6) Eliminate loctite on the thread surfaces using remover.
(Photo 12-8)
• Before reinstallation, apply loctite over the thread
surface on the pressure relief valve.
• For more details about the loctite and the remover,
refer to Page 85.
Photo 12-8
OCH714A
Pressure relief
valve (10 bar) Flare joint
Threads for application of loctite
PHOTOS/ FIGURES
Photo 12-4
Air vent
(automatic)
Air vent joint
Photo 12-5
Pressure relief
valve (3 bar)
Photo 12-6 (Except for EHPT20X-MHEDW model)
Pressure relief
Air vent
valve (3 bar)
(automatic)
Photo 12-7
76
Pressure relief
valve (3 bar)
Flare joint
Flare nut
Flare joint
Threads for application of loctite
Pressure relief
valve (10 bar)
Pressure relief
valve (10 bar)
Flare joint
Flare nut