Assistance et service

The coil part should not be insulated.

Refer to the catalog of each model.

The coil itself is in degree of protection IP64 (JIS C 0920).
For the terminal box, Model TN-1and TN-2: IP03, Model TN-1C and TN-2C: IP54.

When the power is cut off, motor valve stops at intermediate opening.

When the power is cut off, normally closed type (NC type) closes and normally open type (NO type) becomes opens.

No problem. When the product is used with AC voltage, it may produce a buzzing noise depending on the conditions of use.

Although the service life (number of operation cycles) depends on operating condition, model, etc., 100,000 - 500,000 times operation is a standard.
However, DP-100 has recorded 750,000 times operation in in-company tests.

Do not use throttle valve and pipes smaller than nominal size of the solenoid valve.

Our solenoid valve is a single phase 2-wire system.
For a three phase power supply, use two lines, and make sure to insulate the one remaining line.

DP-34 with explosion-proof structure can be used.

Yes. The coil rises to about 70 degrees C by being energized.

It is possible. Place protective covers or guards above the product in order to avoid exposure to water.

No freezing. Use the valve with environmental temperature below 50 degrees C. Do not insulate the coil.

Fluid with less than viscosity 20 cSt can be used.

General differences are as follows;
Pilot type: large flow rate, large product size
Direct acting type: small flow rate, small product size

There is no problem.
Since galvanic corrosion influences the surface area ratio of wetted parts greatly, most influences of galvanic corrosion can be disregarded for real piping with larger surface area of steel pipe than stainless steel.
Although we supply the product with stainless steel made connection parts other than DP-100 series, there is no case where galvanic corrosion become a problem until now. In addition, the corrosion potentials of bronze and stainless steel is almost the same. Since there are no difference in condition of galvanic corrosion and no problem with bronze, it can be said that there is also no problem for stainless steel.

No. In case of a possible frozen pipe, keep the valve casing warm or take some other measures to prevent freezing.
However, do not keep the coil warm. If kept warm, the suction power of the coil may be reduced or the coil may be burned.

Basically, the valve can be installed horizontally or vertically as you desire. However, the vertical installation is limited to the condition that the differential pressure between the inlet and outlet sides is 0.1MPa or more. Besides, we recommend the horizontal installation where possible because the vertical piping tends to cause malfunction in the sliding part due to the scales after a long period of stoppage. In the case of the horizontal piping, the valve must be installed with its coil upward or at least at the horizontal position. Do not install the valve with the coil downward.

The valve does not close and backflow occurs. Install a check valve at the outlet side of the valve, or any other measures should be taken in such a way that the outlet pressure is kept not to exceed the inlet pressure.

According to Construction standard specifications (for the construction of machinery and equipment) issued by Public Buildings Association, Japan [the 2004 edition], 80mesh or more. We recommend 80 - 100 mesh.

When installing a solenoid valve, etc. that opens/closes very quickly, it should be placed before the pressure reducing valve if possible, keeping a proper distance (3m and more is recommended).

180 degrees C (insulation class H).

No, it cannot.

Yes, please refer to the link.

No, it can cause malfunction or breakdown. Please replace with the one with proper voltage.

Please use a circuit protector (breaker) and a fuse. Medium-speed type is recommended because high-speed type and instantaneous type may be actuated by the starting current. Select a circuit protector with rated current around 1.5 to 2 times of the rated current of the solenoid valve. The rated current of the fuse should be 1 to 1.5 times of the starting current of the solenoid valve. Please consult manufacturer of the safety devices.

Yes, though the service life of the lamp will be shorter.

No model is available.

0.75mm2 (cable core).

They cannot be used because they will be corroded.

Yes, work procedures document is available.

Not compatible. The valve has to be replaced.

There is allowable leakage.

No, they cannot.

Yes, the coil can be rotated by loosening hexagonal nut on its top. Please tighten the nut after that.

There are no plus and minus sides on the wires of both AC and DC coils. Please wire according to the manual.

Some models do. Please refer to the drawings and manuals.

No, they cannot. It is recommended to install a bypass valve.

Yes, they can. Make sure that the power is off before operating manually.

Yes, but DC coil type is recommended.