Made in: Japan
Manufacturer: NACHI
Model: High Response Proportional Flow and Directional Control Valve

Features

• 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)

Perfomance

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

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

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

Valve differential pressure – Characteristics of flow

Application

• 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.

    

Specifications

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})
	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

Notes : *1.Maximum flow depends on channel type Mand working pressure.

Operational theory

Measurement

Gasket surface complies with ISO4401-03-02-0-94.