Instruction manual

12 (E)

SR84 / SR85, CH33

Main comsents

Manufacturer Model Name Quantity

SMC Corporation AF3000-02C Air filter 1

SMC Corporation AFM3000-02C Mist separator 1

SMC Corporation AR3000-02G-1 Regulator with 200 kPa pressure gauge 1

SMC Corporation Y30L Spacer assembly with L-type bracket 2

SMC Corporation KQ2S06-M5 Air nipple 1

Note

The air filter and mist separator should incorporate a float-type auto drain (NC) mechanism.

Use a drain tube with a diameter of at least 4 mm and length of 5 m or less. Set the tubes so that there is no

rising.

Tube Layout Notes

Tube arrangement

Use tubes with a bending radius of at least 15 mm and make sure that there are no sharp bends. Also, if the

tubes are laid parallel within the ducts for the electrical wiring or hydraulic tubes, be careful that the tubes

are not crushed by the movement of the ducts.

Tube length

To inject air simultaneously into multiple scales, make the tubes the same length from the distributor of the

air supply unit to each scale so that the injection air pressure is uniform for each scale.

Pressure setting and tube length for pressure reducing valve

If the air injection pressure for each scale is around 20 ±10 kPa, the air in the scale can be maintained at a low

humidity. However, setting the air injection pressure only via the pressure reducing valve will not result in an

air injection pressure of 20 ±10 kPa due to pressure losses stemming from the tube length.

Refer to graph below to determine the pressure setting of the pressure reducing valve.

Pressure reduction setting and tube length

Length of polyurethane tube with outer diameter of 6 mm and inner diameter of 4 mm

(kPa)

(m)

Pressure setting of pressure reducing valve

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Fig. 4-2

This graph illustrates the relationship between the regulator pressure setting and tube length when the air

injection pressure is 20 kPa. The tube length here is considered to be the length from the distributor of the air

supply unit to the scale. When the air injection pressure is 20 kPa, the air consumption amount per scale unit

is approximately 30 N /min.