High Response Proportional Flow and Directional Control Valve

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External view of ESH-G01

High-frequency response equivalent to electric/hydraulic servo valve
High-output proportional solenoid directly drives spool.
Minor feedback with LVDT (Linear variable differential transformer) enables accurate spool positioning.
All ports return to block position when amplifier is turned off or connection is disconnected. (Fail-safe function)

ESH-G01-H520A-10 (For rated flow = 20L/min)

Input voltage - Characteristics of flow
Valve pressure drop: 7MPa (71kgf/cm²)

Valve differential pressure
- Characteristics of flow
Valve differential pressure - Characteristics of flow

ESH-G01-H540A-10 (For rated flow = 40L/min)

Input voltage - Characteristics of flow
Valve pressure drop: 7MPa (71kgf/cm²)
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Valve differential pressure
- Characteristics of flow
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General industrial machinery including mainly machine tools and forging/forming equipment
Carrier device requiring shockless function
Test equipment requiring high-speed response
Ideal for uses that perform actuator positioning and pressure control with feedback control function.

High Response Proportional Flow and Directional Control Valve

Item / Model No.		ESH-G01- H510A-10	ESH-G01- H520A-10	ESH-G01- H540A-10
Maximum operating pressure P,A,B MPa {kgf/cm²}		32
T port allowable back pressure MPa {kgf/cm²}		2.5 {25.5} max
Rated flow rateL/min (Valve pressure drop 7MPa {71 kgf/cm²})		10	20	35
Maximum flow rate L/min		22	35	50
Limit valve pressure drop MPa {kgf/cm²}		32	21	14
Hysteresis %		0.5 max.
Step response ms (0to100% Displacement)		16 max. (*1)
Frequency response Hz (90°C phase delay +/- 10% displacement)		At least 80 (*1)
Center drift	Supply pressure	0.5% max/FS (p=25MPa {255kgf/cm²})
Center drift	Fluid temperature	1.5% max/FS (t=40°C)
Filtration		Class NAS9 max.
Operating fluid temperature range °C (Recommended fluid temperature range °C)		0 to 60 (30 to 60)
Water and dust resistance		IP53
Mass kg		2.3