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4.1 Precaution for operation
1. Do not disassemble the product unless it is necessary.
* Unnecessary disassembly prevents the product from functioning properly.
2. Before installing the product in the piping, be sure to remove foreign substances and scale from
the piping.
* Ingress of foreign substances, scale or seal agent into the product leads to valve leakage or
malfunction of the product.
3. Be sure to install a strainer at the inlet side of the product of nominal size 65A to 100A.
* Ingress of foreign substances or scale into the product leads to malfunction of the product. It is
recommended to use a strainer of 40 mesh or more.
4. Install a safety relief valve for equipment protection at the outlet side of the product.
* Failure to follow this notice may result in damage of the equipment.
5. Be sure to install pressure gauges at the inlet and outlet sides of the product.
* Failure to follow this notice hampers correct pressure adjustment.
6. If a quick operating valve such as a solenoid valve is installed, place it at a distance of at least 3
meters from the product.
* Failure to follow this notice may result in malfunction or a drastically shortened service life of the
product.
7. For two-stage pressure reduction, keep a distance of at least 3 meters between each product.
* Failure to follow this notice may prevent the product from functioning properly due to malfunction.
8. Install the product properly by checking the inlet, outlet and proper posture.
* Installing the product in wrong directions prevents the product from functioning properly.
9. Install pipes so that excessive load, torque or vibration is not applied to the product.
* Failure to make durability lower or cause malfunction.
(1) The product can be installed either horizontally or vertically.
(2) A space more than the value shown as H
inspection. A space more than the value shown as H
inspection of the built-in strainer (nominal size 15A to 50A).
Nominal size
H
H
4. Maintenance and inspection
15A
20A
240
250
2
80
90
3
Caution
in the table below is required for disassembly and
2
in the table below is required for the
3
25A
32A
40A
250
300
300
90
120
120
7
(mm)
50A
65A
80A
320
450
450
150
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100A
550
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■ EP D T-088■
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