Bosch Rexroth | 4WEH16GA7X6EG24NDA
4WEH16GA7X/6EG24NDA
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The 4WEH16GA7X/6EG24NDA directional spool valve is manufactured by Bosch Rexroth for the WEH Directional Spool Valves series. It switches hydraulic flow in automated machinery by translating pilot pressure into spool movement. The NG16 size defines the mounting footprint and aligns with subplate cavities used in medium flow circuits. A porting pattern of ISO 4401-07-07-0-05 matches standard manifolds so installation remains straightforward. The G spool symbol describes a three-position spring-centered element that returns to neutral when pilot pressure is removed, and this arrangement needs a minimum pilot pressure of 14 bar to shift. A pilot volume of 5.72 cm³ quantifies the oil that must be displaced during each actuation. Component series 7X identifies the internal design generation, ensuring correct spare-part matching. The valve weighs 8.9 kg in the two-solenoid spring-centered configuration, and a built-in manual override lets maintenance staff move the spool if electrical power is unavailable.
A high-power 6E pilot stage drives the spool, and its solenoid coil is rated for 24 V DC so the control circuit can be powered from common machine supply rails. External pilot oil supply through port X isolates the control fluid from main line pressure, while external return through port Y diverts pilot exhaust away from the work ports. A pilot flow of 35 l/min is required when the shortest switching time is desired, supporting rapid cycle machinery. The valve tolerates a maximum operating pressure of 280 bar at ports P, A, and B, and it can pass up to 210 l/min at that pressure without exceeding the rated limits. The pilot stage itself may be pressurized up to 250 bar, providing a safety margin between control and main circuit ratings.
Technical Specifications
Coil Voltage
24 V DC (G24)
Component Series
7X
Manual Override
Yes (N)
Max Flow (symbol G, 280 Bar)
210 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (3-pos Spring-centered)
14 bar
Pilot Flow For Shortest Switching Time
35 l/min
Pilot Oil Return
External (Y)
Pilot Oil Supply
External (X)
Pilot Valve Version
6E (High-Power)
Pilot Volume (3-pos Spring-centered)
5.72 cm³
Porting Pattern
ISO 4401-07-07-0-05
Size
NG16
Spool Symbol
G (3-Position)
Weight (two-solenoid, Spring-centered)
8.9 kg
1620 Old Apex Road
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