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4.1 Precaution for installation
1.
When installing the product to the piping, make sure that the tip of the thread does not interfere with the
bulkhead of the valve or apply excessive torque which will damage the valve.
2.
Impact by rapid pressure change, such as water hammer, breaks the product or parts.
3.
When the product is in a sealed piping state, the fluid temperature rising and expansion leads to
malfunction of the product
4.
Keeping fluid in the product for a long term fixes sliding parts and leads to malfunction of the product.
5.
Fluid with viscosity fixes the parts and leads to malfunction of the product.
6.
Secure enough space needed for maintenance, inspection and repair of the product.
7.
Do not apply excessive load, torque or vibration to the product.
8.
Before installing the product, be sure to remove foreign substances and scale from the piping, and
prevent seal materials to be used for piping connection, such as seal tape or liquid seal agent, from
flowing into the inside of piping. Commingling of foreign substances such as scale or seal material leads
to malfunction of the product.
9.
Do not make dissimilar metal piping which causes difference of electrical potential. If doing so, the
product and parts are corroded.
10. Consider usage condition (usage frequency or durability) when selection.
11. When installation, check the direction of the product so that the fluid flowing and the arrow marked on
the product are in the same direction.
* Wrong direction prevents fluid from flowing.
12. The majority of product failures are happened due to scales such as sands and dust in the pipeline.
Please pay attention to the dust inside the pipeline.
5.1 Precaution for operation
1. Before flowing the fluid, make sure that there is no danger when the fluid flows to the end of piping.
Also make sure that the connection is securely connected and there is no slack in the piping
connection.
* If tightening is not secured, the fluid may blow out. If the fluid in high temperature, it can result in
burns.
2. Keep the product warm and drainage the water to prevent from freezing.
3. In case of high temperature fluid, please do not touch the product directly with hands.
* There is a risk of burn.
4. Perform daily inspections and periodical inspections to maintain the product functions.
* If there is any abnormalities, ask specialized dealer for the treatment.
5. After a long term of out of service, perform operation check before re-operate the product.
* If there is any abnormalities, ask specialized dealer for the treatment.
4. Installation
Caution
5. Operating procedure
Caution
‐5‐
■ EPDT-309a ■
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