Introduction of Hydraulic Circuits
Modular Valve Circuit Edition

Meter-In ControlCircuit

YUKEN KOGYO CO., LTD.

Meter-In Control Circuit
Circuit using a Throttle and Check ModularValve

Throttle and check
modular valve

Backward

Fig. 3-1 shows an example of constructing themeter-in control circuit with a modular valve. The
circuit uses the throttle and check modular valve
and the solenoid operated directional valve of all
ports blocked at the neutral point. The flow rate
remains the same during both forward andbackward movements of the cylinder
For both forward and backward movements suchas table sliding, the circuit uses the load of thepositive force generated by sliding (resistanceload). However, the circuit is not used for negativeloads (self-weight loads) in equipment operating in
the vertical direction such as lifters, or loads with alarge inertial force (inertial load) such as coil car
driving.

ForwardWhen the solenoid operated directional valve isin the neutral position, the cylinder position can notbe held due to internal leakage in the solenoid
operated directional valve.

Fig. 3-1

S3001-EⒸ YUKEN KOGYO CO., LTD. All Rights Reserved.Meter-In Control Circuit
The circuits shown on this page are examples ofusing the throttle and check modular valve formeter-in control. By adjusting the valve openings of
A and B ports, the speed during both forward andbackward movements of the cylinder can be
adjusted separately.

Position Holding

The circuit shown in Fig. 3-2 is in combination
with the solenoid operated directional valve of all
ports blocked at the neutral point. When thesolenoid operated directional valve is in the neutral
position, the cylinder position can not be held due
to internal leakage in the solenoid operated
directional valve.

Backward

ForwardFig. 3-2

S3001-E

Backward

Forward

The circuit shown in Fig. 3-3 is for holding theposition in the middle of the cylinder stroke. Thecylinder position can be held by using the solenoid
operated directional valve of the ABT connection in
the neutral position type and combining it with thepilot operated check valve.

Fig. 3-3Ⓒ YUKEN KOGYO CO., LTD. All Rights Reserved.

Meter-In Control Circuit
Position Holding and the Reducing Valve forP-Line

The circuits shown on this page are the meter-in
control circuits, capable of position holding in themiddle of the cylinder stroke. In addition, thepressure of the circuit can be reduced.
The circuit shown in Fig. 3-4 is an example ofadding the reducing modular valve (reducingvalve) for P-line to the meter-in control circuit for
position holding shown in Fig. 3-3. This reducing
valve regulates the pressure during both forward
and backward movements of the cylinder.
The circuit shown in Fig. 3-5 is an example ofusing the two-position solenoid operated
directional valve with a detent function. This circuit
is used for the clamping mechanism. The check
modular valve is used to prevent loosening.

Fig. 3-4

S3001-E

Fig. 3-5Ⓒ YUKEN KOGYO CO., LTD. All Rights Reserved.

The hydraulic circuits shown in this document are limited to typical ones.
Refer to this document when creating hydraulic circuits.
If you require assistance with hydraulic circuit considerations or any other hydraulics-related questions,please contact us.

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