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1. Do not install any closing device such as a stop valve at inlet or outlet sides of the product.
* Failure to follow this notice may result in damage to the pressure vessel because such closing device
may hamper the blowout of the safety relief valve.
2. Install an exhaust pipe on outlet side of the product, and lead it to a place where there is no risk of physical
damage even if fluid blows out.
* Failure to follow this notice may result in injury and scalds in case of fluid blow out.
3. Do not disassemble the product.
* Failure to follow this notice may prevent the product from functioning properly and lead to danger.
4. When installing, tighten the hexagonal part of the valve seat [2] with a spanner.
Do not adjust its direction by rotating the outlet piping.
* Failure to follow this notice may result in scalds or injury due to blow-off caused by screw crack on the
spring case [1] or loosing of the spring case [1] and the valve seat [2].
5. Do not apply viscous fluid that may make fixation of the valve and valve seat.
* Failure to follow this notice may prevent the product from functioning properly.
1. Before installing the product, remove foreign substances and scale from the piping.
* Failure to follow this notice may prevent the product from functioning properly.
Note that the customer will be required to pay repair charge for any defect that occurs due to foreign
substances.
2. When installing the product, match the direction of fluid flow with the inlet and outlet of the product
respectively.
* Failure to follow this notice may prevent the product from functioning properly.
3. Install the product vertically with the cap [13] facing upward.
* Failure to follow this notice may prevent the product from functioning properly.
4. Securely support and fasten the pipes.
Refer to the following "Pipe mount" and "Exhaust pipe".
* If an excessive stress is applied to the piping, the product may be deformed and not open/close.
5. Lead exhaust pipe to outside of buildings if there is a risk that fluid blowout causes alarm activation
or contamination of the peripheral equipment.
* Improper placement may cause contamination of the peripheral equipment.
6. Connect the product to the pipes securely.
* Improper connecting may cause fluid leakage from the piping joint when vibration is applied, or may
cause scalds in case that fluid is hot.
7. If there is a risk that condensate or rain water accumulates in exhaust pipe, attach drain pipe with the
product and/or the exhaust pipe in a position where they can be drained.
* Failure to follow this notice may cause rust and result in malfunction.
8. Inner diameters of pipe mount and of exhaust pipe shall be more than those of each inlet and outlet
of the product.
* Failure to follow this notice may result in malfunction or insufficient amount of blowout.
9. Secure enough space required for maintenance or inspections.
* Failure to follow this notice prevents maintenance and inspections being implemented.
10. Avoid rapid pressure change. Impact by a rapid pressure change, such as water hammer, may
damage the product/parts.
11. Do not apply excessive load, torque or vibration to the product.
12. Select a proper model according to usage conditions including operation frequency and durability
required.
7. Installation
Warning
Caution
5
E PDT-193d
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