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Notes for Piping Installation

Most of the troubles of the pressure reducing valve are caused by foreign substances or condensate disturbance inside the piping.
The trouble caused by foreign substances or condensate disturbances (rust generated by condensate retention and troubles by water hammer) is subject to
a charge during the warranty period.
Make sure to read the instruction manual delivered together with the product before piping work.

Notes for Piping Installation

・ Make sure to install a strainer so that foreign substance inside the piping can not enter valves.
・ Install the bypass line for pressure reducing valves, temperature regulating valves, trap, etc.
・ Seize a designated point with a wrench when installing.
・ Install the product so that the fluid flowing and the arrow marked on the product are in the same direction.
・ Support the piping so that excessive load is not applied to the valves.

If you ask for repairing and presence at operation, please contact our local distributors for details.

Please see below for each product.

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Pressure Reducing Valve

There is no strainer on the inlet side.

Make sure to install a strainer (recommendation: 100 mesh) at the inlet side of the pressure reducing valve.
* Failure to follow this notice may prevent the product from functioning properly.

There is no drain separator and no trap on the inlet side.

Make sure to install a drain separator or steam trap at the inlet side of the pressure reducing valve to prevent condensate disturbance.
* Failure to follow this notice may cause condensate disturbance.

There may be a quick-opening valve installed just before or after the pressure reducing valve or
there is two-stage pressure reduction just after the pressure reducing valve.

If a quick operating valve such as a solenoid valve is installed in the line, place it at a distance of at least 3 m from the product.
* Failure to follow this notice may result in malfunction or a drastically shortened service life of the product.
If the product is used for two-stage pressure reduction, take at least 3 m between each product.
* Failure to follow this notice may result in malfunction.

a quick-opening valve

There is a rising pipe on the outlet side, under which there is no trap installed.

If there is a rising pipe on the outlet side, make sure to install a steam trap to prevent condensate disturbance.
* Failure to follow this notice may cause condensate disturbance.

Pressure Reducing Valve

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Safety Valve

Remove the foreign objects from inside the piping before installing the product.

Before connecting the safety valve to piping, clean inside of the piping and remove foreign substances and scales inside the piping.
* If cleaning is not enough, safety valve may be kept from functioning properly due to scales.

There is allowable amount of leakage with safety valves.

Do not apply the product to devices which do not allow any valve seat leakage.
* Safety valve has allowable valve seat leakage and does not close completely (the valve seat leakage cannot be zero).

Install a safety valve at the position from which transmission of vibration is evaded.

Safety valve cannot be used for the devices or equipments which generate an excessive vibration.
* Failure to follow this notice may result in malfunction safety valve due to vibration.

Install the piping at the proper positions.

To install the product, confirm if the direction of fluid flow matches with inlet and outlet sides of the product and install the product correctly.
* Setting the product in wrong directions prevents it from functioning properly.

positions

Lead the pipe on the outlet side of the safety valve in the safer direction.

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.

In case of the safety valve is installed outdoor, ensure that plumbing should be done in order to prevent the rain water from entering the outlet side of the safety valve.

When there is a possibility that condensate, rain water, etc. may collect on blow-off piping, prepare drip pan in the position which can extract them.
* If condensate, rain water, etc. collect on blow-off piping, it will become the cause of malfunction by generating of rust.

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Solenoid Valve

Remove foreign objects from inside the piping before installing the product.

Before connecting the safety valve to piping, clean inside of the piping and remove foreign substances and scale inside the piping.
* Failure to follow this notice may prevent the product from functioning properly due to the ingress of foreign substances and scale into the valve.

Execute wiring work in a proper way and do not turn on power while wiring.

Connect the cables according to the instruction after confirming the rated voltage.
* Erroneous cable connection may cause an electric shock or fire.
Connect the cables only after confirming that no power is supplied.
* Failure to follow this notice may cause an electric shock.

Install a trap before the product at a spot where much drain is collected.

When using for steam, install the steam trap on piping system.
* Failure to follow this notice may cause malfunction of the safety valve due to condensate disturbance.

Install the solenoid valve in such a way that the coil component is placed higher than the horizontal level.

Vertical or horizontal installation is possible including the intermidiate between vertical position and horizontal position, however, the coil has to be installed above horizontal level.
* Failure to follow this notice may result in an abnormal operation.

取付け方向

Make sure to install a strainer just before the product.

Make sure to install a strainer (80-100 mesh) at the inlet side of the pressure reducing valve.
* Failure to follow this notice may prevent the product from functioning properly due to the ingress of foreign substances and scale into the valve.

電磁弁

If applied fluid is steam, and piping at outlet side is led into fluid tank directly, make sure to install a vacuum relief valve.

For solenoid valve for steam use, when closed, if the pressure at outlet side of the solenoid valve becomes negative, make sure to install a vacuum relief valve.
* Failure to follow this notice may cause leakage from valve seat or malfunction due to the ingress of foreign substances.

a vacuum relief valve

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