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８．２ Precautions during disassembly and inspection
Warning
Completely discharge internal pressure from the valves, lines, and equipment,
and cool the valve down to a level where you can touch it with bare hands before
disassembly and inspection.
※Failure to do so may result in injury or burns due to residual pressure or
spillage around the valve.
Caution
( １ ) Perform periodical inspection to maintain product functions and
performance.
※ General users shall request countermeasures to installers or
maintenance companies.
(２) The pressure reducing valve shall be disassembled and inspected by
qualified persons.
(３) Rubber parts and components shown below are consumables. Note that the
life expectancy depends on the conditions under which they are used.
Serviceable life
3 years
5 years
※For circled numbers, refer to ３．Dimension & Weight.
８．３ Disassembly
(１) Releave the internal pressure completely, and make sure of zero pressure.
(２) Slightly loosen the lock nut⑭ and turn the adjusting screw⑬ counter
clockwise to relieve the adjusting spring⑫ (Unload the spring).
(３) Remove the hexagon bolt⑰ from the spring chamber②,then remove the spring
chamber②, and take out the adjusting spring⑫ and the spring plate⑩ .
(４) To remove the diaphragm⑨ , fix the spindle⑤ and remove the U nut⑱.
(５) To remove the retainer⑥, loosen and remove the retainer guide clamping bolt
⑯ and pull the retainer guide⑧.
Remove it by the bellow method（Fig.13,Fig.14） when it is difficult to remove
the retainer guide⑧.
(６) To remove the valve seat③, pull the spindle⑤.
(７) Fix two planar sections at spindle⑤ and loosen U nut for spindle to remove
it, then the valve can be dismounted.
Table 8
Parts name/number
○
○
Valve
4 、O ring
7 、Diaphragm
○
○
O ring
19
-13-
○
9
○
○
20
21
22
■EPDT-096b■
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