A leading fluid control valve company that supports living and active corporate activities in various places and forms

Please see the video of the pressure adjustment method from the answer details.

It doesn't flow. It will flow normally only after adjusting the pressure.

The allowable leakage amount is stated in the specifications of each product.

The secondary pressure is not adjusted properly.

The cause of the increase in pressure on the secondary side may be foreign matter entanglement, poor sliding, etc., and disassembly and maintenance is required.

We perform regular maintenance once a year as a guide. Please refer to the instruction manual for details.

The standard life of the product is about 8 years, but it actually depends on the presence or absence of maintenance.

The set pressure cannot be maintained, and the pressure loss drops as much as the flow rate flows.

CAC is a bronze casting that is often used for valve bodies and key components. SUS (stainless steel) has better corrosion resistance than CAC, but the price is high.

Please see the video of the pressure adjustment method from the answer details.

The useful life of the main unit is about 8 years, but it depends on the usage conditions and environment.

When no water is flowing (flow rate 0), the valve is closed and the secondary side holds the set pressure.

If the conditions are outside the specified range, control will be lost and operation will become unstable.

The straight pipes before and after the pressure reducing valve are provided for the purpose of reducing the turbulent flow of fluid that has passed through the valve, etc., but if it cannot be installed due to the dimensions of the buried pit, etc., pressure control by the pressure reducing valve is possible without installing it.

The mounting posture can be horizontal or vertical. If the size is large, please take a large maintenance space.

If there is a risk of freezing, keep warm and drain water.

Dust that has passed through the strainer gets caught in the contact surface of the valve body and valve seat. After removing the dust in the pipe with a substitute pipe, install the pressure reducing valve.

Basically, in the case of pressure reducing valve assembly, it is 1.2 times the set pressure on the secondary side. (From SHASE S106)

It is okay to apply 1.75MPa from the primary side, but if pressure is applied from the secondary side, the disc may be pressed against the valve seat or the diaphragm may break.

If the pressure reducing valve is used for many years, problems such as dust biting and damage may occur.

Since regulated substances and materials are used for parts such as the main body, it is not currently supported. For correspondence, please estimate the model, nominal diameter, number of units, etc.

The service life of pressure reducing valves for door-to-door water supply is 8 years after regular inspections, maintenance, and replacement of consumable parts, but this may vary depending on usage conditions.

Noise tends to be higher due to disc damage (bite) and benza damage over time.

Not all units have it. It is not necessary to install it if the water pressure is not high on the upper floors.

Since the mounting posture is horizontal and vertical (except for the strainer cap facing upward), it can also be installed in vertical piping.

The pressure gauge fitting has a check valve-like structure, and normally, water does not leak to the outside even when the pressure gauge is not attached.

It can be installed (available as an option).

As a guideline for maintenance, we recommend annual inspection, overhaul inspection every 3 to 4 years, and replacement of consumable parts (rubber parts such as diaphragms, discs, O-rings).

Please check the details page.

For the purpose of flowing a constant flow rate for cooling water of equipment and applications such as weighing, and for housing equipment, distribute the water supply and hot water supply to each house in an appropriate amount (restrict that it is not overused by one house).

It can be used for overflow limiting applications.

It is a pipeline with a reduced area. It is the throttle of the flow path when its length is relatively short compared to the cross-sectional dimension.

The flow rate remains constant even if the pressure fluctuates.

For some constant flow valves, the set flow rate can be changed by replacing the constant flow cartridge.

Please check the details.

Air and nitrogen adjusted to a predetermined pressure are sealed on the opposite side of the rubber diaphragm, hose, metal bellows, and piston to the wetted part to absorb water hammer.

Basically, install it in the immediate vicinity of the device that generates water hammer.

There is a difference in the amount of blowout between the lift type and the total amount type. Either one can be used as long as the required amount of blowout is satisfied.

This is to check if the safety valve can be operated and if there is any abnormality (sticking). (Operate when the pressure on the inlet side is 75% or more of the set pressure.)

As a general rule, select no lever (sealed type) for fluids that adversely affect the surroundings when the safety valve operates, such as flammable / toxic and liquid. If it is necessary to check the operation of the safety valve by operating the lever, select the one with a lever.

In principle, it is an upright installation with the entrance facing down.

Due to the structure, it can be adjusted within the spring range, but this should be done by a skilled professional. Additionally, if the pressure is changed by the user, our company does not cover it.

Since it is a product that does not normally operate frequently, it is necessary to check for sticking by regular inspection. Please contact us if you have any problems using it.

You can submit it, so please contact the agent where you purchased the product, the store, or our nearest sales office.

It is used to prevent overheating due to shutoff operation of the pump and to keep the pump discharge pressure constant.

Refers to the primary pressure control valve. A regulating valve that discharges fluid in response to changes in the force on the primary side in order to maintain the fluid pressure on the primary side at a certain constant pressure.

Please check the details.

Please check the details.

Please check the details.

When using a solenoid valve, the water level is detected by the liquid level switch, and the main valve is opened and closed by the operation of the pilot solenoid valve to control the water level.

It is not a constant flow valve. The purpose is to regulate the maximum flow rate to prevent the water pressure drop in the water pipes during the daytime when tap water is in high demand.

The valve structure makes it difficult for water hammer to occur. There is also a constant water level valve with an adjustment mechanism that can adjust the flow rate and valve opening / closing time. In addition, some water companies require the installation of water hammer preventers.

We do not handle control panels.

The vacuum breaker sucks air when the upstream side becomes negative pressure and prevents the backflow from the downstream side due to the reverse siphon action.

There is no exhaust function.

The vacuum breaker draws in air, so avoid installing it in the ground where it may be submerged.

The check valve is used to prevent backflow due to back pressure, which is higher on the outlet side than on the inlet side.

A normal check valve has one valve to prevent backflow, but it is equipped with two valves to improve safety.

Refers to the release pressure of the valve body. It is listed as a performance item of the Japan Water Works Association standard "JWWA B129 check valve for water supply".

All of our check valves can be used for vertical piping. (Applies to the flow direction from bottom to top)

It is a check valve equipped with two check valves and relief valves, and two and four test cocks for function check.

The decompression type backflow preventer is a backflow preventer that has a mechanism that utilizes the pressure difference between the two check valves inside the main body, so it is not intended for pressure adjustment. Use a pressure reducing valve to adjust the pressure.

Even if it is normal, it may be drained due to fluctuations in water supply pressure.

Water will flow out from the drain when the differential pressure relief valve is activated, so install a hopper below the drain or install an optional air gap (indirect drain fitting).

From the viewpoint of maintenance and inspection and pollution prevention, install it on the ground where there is no risk of submersion.

To change the temperature range, it is necessary to replace the set of temperature sensitive parts (including lead tube, bellows, bellows case) including the heat sensitive cylinder.

The temperature setting error varies depending on the length of the lead wire. Please contact us for more information.

When the set temperature is approached, the valve starts to close, and finally the valve closes. However, there is a permissible amount of leakage.

It works to close, but it cannot be completely closed, resulting in hot or cold water leaks on the secondary side.

Horizontal, vertical and horizontal mounting is free. (When installing vertically with a check valve, install it so that the check valve flows in the flow direction from bottom to top.)

Please see the video for the adjustment method in the answer details.

A silencer is used when steam is blown into water to make hot water, and noise and vibration due to steam inflow are reduced. If the silencer is not used, extreme noise and vibration will occur.

The sound limit temperature is the maximum temperature of hot water that can maintain the function of the silencer.

When steam is blown directly into water, the steam condenses and creates a cavity, and when the surrounding hot water flows toward the cavity and collides, a large impact and noise are generated. The silencer emits steam from a small nozzle and smoothes the mixing with water to reduce noise.

In steam-related terms, it refers to steam condensed water (a state in which steam has cooled and returned to water).

When the steam cools, it returns to water (drain). If drainage accumulates in the piping and equipment, it may reduce the efficiency of the equipment and cause water hammer, so it is used for the purpose of automatically discharging the generated drainage.

The bypass function is used at the initial stage of ventilation of equipment, etc., and it is used for the purpose of discharging a large amount of air and drain to accelerate the start-up time.

The interval between steam traps in the straight pipe of the steam transport pipe is set to 25 to 50 m for the purpose of quickly draining the drain in the pipe and preventing water hammer.

It is okay to keep the float type warm (it may vary depending on the conditions). Avoid keeping warm as the thermostical type affects the operation.

There is no effect from the mounting posture.

If the primary side becomes negative pressure, drainage such as drainage will be sucked in, causing troubles in traps and equipment, so do not submerge it.

A state in which the drain on the primary side of the trap cannot flow in due to the steam existing in the trap.

This is a phenomenon that tends to occur in heat exchangers with load fluctuations.

Make the trap primary pressure higher than the secondary pressure. Vacuum recovery is used on the secondary side of the trap. There are various methods such as using a pumping trap (AFP-1H type) with a trap function. Please contact your nearest sales office for details.

Please watch the video of the answer details.

At the time of shipment, the internal bucket is sunk. By injecting water, the bucket gains buoyancy and the valve can be closed.

It can be completely closed.

It does not affect the operation even if it is turned upside down.

Keep the knob and thumbscrew open during normal operation (fixed at the time of shipment). In the event of water leakage, the knob closes the plug. (After that, disassemble and repair immediately.)

It will be in an exhaust impossible state.

Use the AF-9 type when the suction side of the pump or other functions that only discharge air but do not suck air are required.

When negative pressure is generated, the intake air is activated, but the amount of intake air is very small, so use the intake / exhaust valve if intake is also the purpose.

Although it can be used, it may be required to install an intake / exhaust valve depending on the business entity, so please check with the business entity in your jurisdiction.

Our air vent valve does not correspond to the old JIS product.

Since air is also carried to the return pipe by the flow of hot water supply, install one each at the top of the outbound pipe and the return pipe.

If you install one at the top of the return pipe, it will cause air damage at the return pipe, so if you install it at the top of the return pipe, there will be less air damage.

The major difference between the intake / exhaust valve and the air vent valve is the intake capacity at negative pressure. If the pressure inside the water supply stand pipe drops due to a water outage or an accident, the upper part of the stand pipe becomes negative pressure and there is a risk of backflow (reverse siphon) occurring inside the building.

The major difference between the intake / exhaust valve and the air vent valve is the intake capacity at negative pressure. If the pressure inside the water supply stand pipe drops due to a water outage or an accident, the upper part of the stand pipe becomes negative pressure and there is a risk of backflow (reverse siphon) occurring inside the building.

It operates in the same way as a normal air vent valve, and refers to the function that allows air to be discharged under pressure.

When using for the purpose of relieving the negative pressure of tanks and other frequently operated equipment, use the AF type air vent valve in combination with the VD-5N type vacuum breaker.

When the pressure may drop below 0.01MPa (when the pressure drops to 0.01MPa or less when using water supply), the intake / exhaust valve operates each time, and water due to dust biting or damage to the cucumber disc is activated. Problems such as blowout and noise will occur.

The sleeve type can also absorb the shaft rotation of the pipe. (The bellows type cannot be absorbed and the bellows will be damaged.)

Since the amount of elongation is determined by the temperature difference, it is constant regardless of the nominal diameter of the pipe. However, it depends on the type of pipe (steel, copper, stainless steel).

There is no rule. It doesn't matter which one you choose, as long as you select the number of pipes that matches the amount of expansion and contraction of the pipe.

It is not possible to absorb the lateral vibration of the pipe with the expansion joint. Use a ball joint to absorb lateral vibration.

It can be modified if the main body has a bearing hole for dabit (changed from 2005).

Originally, it is selected according to the fluid, application, etc. If the mesh is fine, clogging will occur frequently, and if it is coarse, foreign matter will pass through and foreign matter will enter the product, causing malfunction or damage to the equipment.

Basically, it can be installed on vertical piping, but please install it so that the flow direction is from top to bottom. (KU and KW types should be used on horizontal piping.)

Parts can be supplied.

Although the mounting posture is not specified, it is recommended that the net outlet be turned downward from the viewpoint that all the accumulated dust can be taken out inside the strainer body.

Please watch the video of the answer details.

The solenoid valve coil has a "continuous rating", so there is no problem even if it is used while it is energized.

There is no problem even if the coil part is hot. Please check the video explaining the answer in detail.

The solenoid valve is closed by the weight of the valve body and the fluid pressure. Therefore, when there is no inlet pressure and a reverse pressure is applied, the valve opens and backflow occurs. In this case, install a check valve on the secondary side of the solenoid valve.

It can be used, but if it does not work (does not move) for a long time, it may stick and not work properly in an emergency. Regular operation check is required.

Please watch the video of the answer details.

The operating acceleration cannot be changed in the field. Please contact us when ordering.

EIM-2,3 Leeds is also manufactured with a limit switch (no voltage) as an option. The EIM-7 series has a limit switch (no voltage) on the closed side as standard.

The mechanical emergency shutoff valve does not require external power such as electrical signals, and does not require a power source because it operates only with the operating force of the seismic sensor due to seismic motion.

When the piping is broken due to a disaster such as an earthquake, it works to secure water by stopping the shutoff valve at the entrance and exit so that the water in the water tank does not flow out.

The mounting posture is only upright mounting on horizontal piping.

We also manufacture two-unit control. Please contact us.

The Ministry of Land, Infrastructure, Transport and Tourism recommends the installation, but there is no legal obligation and it depends on the way of thinking of each local government.

The EIM-7N mechanical emergency isolation valve can be operated without electricity and can be manually restored.

This prevents the motor from burning if the motor exceeds the maximum allowable temperature for some reason.

It is a mechanism that winds the spring at the same time as the valve opens when the power is turned on, and closes the valve by the force of the spring that winds up when there is a power failure. (In the case of valve open type when energized)

We do not manufacture spring return type three-way valves.

Spring return type and capacitor return type are applicable.

BM-7S type electric valve is applicable.

ML type electric valve is applicable.

Other electric valves other than ML type electric valve are applicable.

CP and GP series cannot be installed. Installation of vertical pipes may cause uneven wear of each sliding part and malfunction, so basically install it on horizontal pipes.

Currently, hydraulic drive is not available.

The product warranty period is one year after delivery (after arrival) to the designated delivery location.

The sales staff of each sales office have mastered general product repair techniques.

Please contact the place of purchase of the product or our nearest sales office.

Basically, it is free of charge, but the customer is responsible for the shipping fee from the site.

Please contact your nearest sales office.

We are performing trap diagnosis. Please contact your nearest sales office.

Please contact your nearest sales office.

We do not do plumbing work.

You can purchase from a distributor.

Government offices, petrochemical plants, steel-related, food, paper machinery, pharmaceuticals, shipbuilding, transportation, construction-related, etc.

Please contact us as there are countries and regions where we can provide information on distributors.

Iwate Factory: Mainly manufactures steam-related products and automatic valves such as pressure reducing valves and safety valves Sagamihara Factory: Mainly manufactures other-power solenoid valves and electric valves