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Nachi Electro – Hydraulic Proportional Flow and Directional Control Valve

Made in: Japan
Manufacturer: NACHI
Model: Electro – Hydraulic Proportional Flow and Directional Control Valve

Features

  • Provides both direction switching and speed control functions.
  • Controls direction by supplying an input current into one of the two proportional solenoids and controls flow by changing the input current.
  • Remote control and shockless acceleration/deceleration control enables simplification of the hydraulic circuit.

Perfomance

ESD-G01-C520-12 (for rated flow=20L/min)

Input current – Characteristics of flow
Input current - Characteristics of flow
Pressure – Characteristics of flow
Pressure - Characteristics of flow

Application

  • General industrial machinery including mainly machine tools and forging/forming equipment
  • Carrier device requiring shockless function
  • Uses that require continuously changing flow

Electro - Hydraulic Proportional Flow and Directional Control Valve      Electro - Hydraulic Proportional Flow and Directional Control Valve

Specifications

Item / Model No. ESD-G01-**10
20
-12
ESD-G03-**
40-(**)-12
80-(**)-12
ESD-G04-
**140-(**)-12
ESD-G06-
**250-(**)-13
Maximum operating pressure
MPa {kgf/cm2}
25 {255}
Rated flow rate L/min 10/20(*1) 40/80(*1) 140(*1) 250(*1)
Maximum flow rate L/min 25(*2) 100(*2) 140(*2) 250(*2)
Pilot pressure
MPa {kgf/cm2}
At least 1.0 {10}(*3)
Pilot flow rate L/min At least 2
(*4)
At least 3
(*4)
At least 5
(*4)
T port allowable back pressure
MPa {kgf/cm2}
25 {25.5} Internal Drain: 2.5 {25.5}
External Drain: 21 {214}
Rated current mA 850
Coil resistance  20(20°C)
Hysteresis % 5 max.(*5)
Response time s 0.04(*6) 0.05(*6) 0.08(*6) 0.1(*6)
Mass kg 2.2 7 9.2 15

Notes :
*1.Value when pressure drop volume to P to A and P to B is  P =1.0MPa {10kgf/cm2}.
*2.Indicates maximum throughput volume value between each port.
*3.Indicates differential between the pilot port and tank port, or drain port.
*4.Value when 0.1 second is assumed for the response time from zero to the rated flow volume.
*5.Value when a Nachi-Fujikoshi special amplifier is used.
*6.Response time is typical value for a supply pressure of 14MPa {143kgf/cm2} and fluid temperature of 40°C (kinematic viscosity: 40mm2/s).

Measurement

ESD-G01

Electro - Hydraulic Proportional Flow and Directional Control Valve

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