7
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EPDT-263b
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6. Operation
6.1 Precaution for Operation
Warning
Before letting the fluid into the product, make sure that there is no danger when the
fluid flows at the ends of piping.
* The hot fluid, if spouted out, may scald your skin.
Caution
Use the product under a maximum pressure loss of 0.1 MPa or less. Periodically
clean the screen.
* The screen may be broken.
7. Maintenance
7.1 Troubleshooting
Trouble
Cause
Remedy
Fluid does not flow.
1. The screen [5] is clogged.
1. Disassemble the product and clean the
screen [5].
2. Stop valves before or after the
product are closed.
2. Open the stop valves.
Excessive
pressure loss.
1. The screen [5] is clogged.
1. Disassemble the product and clean the
screen [5].
2. Pressure gauge is out of order.
2. Replace the pressure gauge with a new
one.
3. Nominal size of the product is too
small for the flow rate.
3. Replace the product with a new one
proper for the flow rate (see Fig. 1
“Pressure Loss Chart” on Page 3).
Foreign substances
are not removed.
1. The screen [5] is damaged.
1. Disassemble the product and replace the
screen [5] with a new one.
2. The O-ring [8] is damaged.
2. Replace the O-ring [8] with a new one.
When replacing the
screen [5], the
stopper ring [3] is not
rotated.
1. There is residual pressure in the
product.
1. Completely remove the pressure in the
product.
2. The body [1] and the stopper ring
[3] stick to each other.
2. Detach the stopper ring [3] with
reference to “7.3 How to Detach/Clean
the Screen” on Page 7.
When replacing the
screen [5],
the cover [2] does
not come off.
1. There is negative pressure in the
product.
1. When removing the plug [15], break
negative pressure in the piping and detach
the cover [2].
2. The cover [2] and the body [1]
stick to each other.
2. Detach the cover [2] with reference to “7.3
How to Detach/Clean the Screen” on
Page 7.
Outside leakage.
1. The O-ring [7] is damaged.
1. Replace the O-ring [7] with a new one.
2. The cover [2] is not installed
properly.
2. Install the cover [2] with reference to “7.4
Reassembly” on Page 9.
