EPDT-255b
9
9.4 Precautions for reassembly
Caution
1. Make sure that there are no flaws on the diaphragm [8], the valve seat [6] and the valve [7].
* Flaws on them may prevent the product from functioning properly.
2. Apply silicon grease to the O-ring [20] after confirming that there are no flaws on it.
* Without silicon grease, the O-ring may be torn.
3. Confirm that the lip of the diaphragm [8] is fitted in the grooves on the body [1], and then attach the
spring chamber [2].
* Failure to follow this notice may prevent the product from functioning properly.
4. There should be a gap between the retainer guide [4] and the body [1] when properly assembled.
Tighten the bolts evenly to avoid over-tightening them.
10. Troubleshooting
Trouble
Cause
Remedy
Excessive leakage
Adjustment is
impossible.
1.
Foreign
substances
stuck
between valve [7] and valve seat
[6]. Or damage on valve [7]
and/or valve seat [6].
1. Disassemble and clean, or replace.
2. Damage
on
diaphragm
[8]
and/or O-ring.
2. Replace diaphragm [8] and/or O-ring
[20].
3. Nominal size is too small for the
specifications.
3. Replace the product to obtain proper
nominal size (see “6.1 Nominal size
selection chart”).
4. Pressure gauge is out of order.
4. Replace.
Abnormal
sound is
observed
1. Air-induced problem occurs.
1. Install exhaust equipment.
2. Nominal size is too large for the
specifications.
2. Replace the product to obtain proper
nominal size (see “6.1 Nominal size
selection chart”).