Features of Our Proprietary Flow Relay

Longevity and Durability - For Cost Efficiency

Thanks to our frictionless plate spring method, part replacement cycles are greatly extended.

Aroma Nikki's flow relay detects flow solely through the deflection of the plate spring. As there are no friction sliding parts in the flow detection section, there are no gaps for dirt or debris to get into and cause blockage. Furthermore, the plate spring is made of a special material with high corrosion resistance and durability, experiencing little degradation over time. This means that there's no need to replace the flow detection section itself for a long period, and by regularly replacing inexpensive seal parts (like O-rings and packings), you can use it without any decrease in performance over the long term.

Image of flow rate detector of Aroma Nikki flow relay

The flow detection section of the Aroma Nikki-made flow relay. There are no friction sliding parts.

 Image diagram of friction sliding part

Friction sliding parts refer to sections that slide against each other while rubbing relatively, like shafts and bearing parts.

We select materials for our components that are suitable for the liquid quality and temperature, enhancing durability.

Image of flow relay SP-R type with stainless steel body and window frame

Flow Relay SP-R type, with a body and window frame made of stainless steel components

In environments where rust is likely to occur, we use stainless steel components and propose specifications suitable for the installation environment, such as changing the paint specifications of the body.

We use tempered glass for the sight glass.

tempered glass images

The tempered glass, which has sufficient strength, is designed to withstand high pressures. It has been heat-treated to create a strong compressive stress layer on the glass surface, enhancing its breaking strength. Mechanically, it has about three times the strength of regular glass.

High-Precision Flow Detection

Flow detection is solely performed through the deflection of a unique plate spring.

Image diagram of the flow rate detection part

Our proprietary flow detection method utilizes a plate spring that excels in strength, elasticity, corrosion resistance, and heat resistance. There are no gaps in the flow detection part where water scale or debris could accumulate, preventing parts from becoming stuck even with long-term usage and ensuring accurate flow detection.

leaf spring images

The plate spring maintains its strength and does not deform or break throughout its use period due to its repeated deflections.

Other Features

image of flow test

We conduct flow tests on all products before shipment

image of test report

A test result sheet is attached to each product, allowing you to quickly understand the operating flow rate.

SP-R model, etc. Image of adjustment screw adjusted with a flathead screwdriver

SP-R Models
Adjusted with a minus screwdriver.

SP-RX model, etc. Image of adjustment screw adjusted with a dial

SP-RX Models
Adjusted with a dial.

Flow rate adjustments can be made during operation. By turning the adjustment screw, you can easily modify the operating flow rate.

The flow relay can be customized according to the direction of the pipeline, supporting not only horizontal directions, but also upward and downward flow types.

Image of pipe direction

We can manufacture the flow relay according to the direction of the pipeline. It's not limited to the horizontal direction; we can also create models for upward and downward flow types.

Image inside the product

Our flow relay uses a proximity switch system that combines a reed switch and a permanent magnet. This system provides sharp operation and an appropriate hysteresis characteristic to prevent chattering.

Our device detects flow rate regardless of the pressure in the pipeline.

The area around the intake part has a sufficient area for the fluid to pass, resulting in minimal pressure loss. Moreover, the design ensures that the presence of some solid particles does not cause operational problems.

fluoroscopy images

Each unit is equipped with a sufficiently large sight glass for flow observation, providing excellent light collection and making it easy to inspect the inside.

Guideline for Hysteresis (Cut-off Difference)

SP-R, SP-RN, SP-RX, SP-RXC, SP-REX, SP-REXC Models

In the case of a reduction operation setting Return flow rate (increase operation flow rate) = Reduction operation flow rate ÷ (0.65~0.80) For example, if the setting flow rate for the reduction operation is 100l/min, the return flow rate (increase operation flow rate) will be manufactured to fall within the range of 125~154 l/min.
In the case of an increase operation setting Return flow rate (reduction operation flow rate) = Increase operation flow rate × (0.65~0.80) For example, if the setting flow rate for the increase operation is 100l/min, the return flow rate (reduction operation flow rate) will be manufactured to fall within the range of 65~80 l/min.

NP-R, NP-RT Models

In the case of a reduction operation setting
If the reduction operation setting flow rate is 2.0 l/min or more Return flow rate (increase operation flow rate) = Reduction operation flow rate ÷ (0.625~0.725)
If the reduction operation setting flow rate is 0.3~1.9 l/min Return flow rate (increase operation flow rate) = Reduction operation flow rate × 2 or less
If the reduction operation setting flow rate is 0.2 l/min Return flow rate (increase operation flow rate) = 0.5 l/min or less
If the reduction operation setting flow rate is 0.1 l/min Return flow rate (increase operation flow rate) = 0.3 l/min or less
In the case of an increase operation setting
If the increase operation setting flow rate is 3.9 l/min or more Return flow rate (reduction operation flow rate) = Increase operation flow rate × (0.625~0.725)
If the increase operation setting flow rate is 0.4~3.8 l/min Return flow rate (reduction operation flow rate) = Increase operation flow rate ÷ 2 or more
If the increase operation setting flow rate is 0.3 l/min Return flow rate (reduction operation flow rate) = 0.1 l/min or more