I. Model Breakdown

4WE: 4-way, wet-type electromagnet, electromagnet directional valve

6: Nominal diameter DN6 (NG6), installation surface ISO 4401 (CETOP 03)

D: Valve core function D type (4/2)

Normal state (spring position): P→A, B→T

Powered (electromagnet position): P→B, A→T

61: Structural version 61 (60 series), installation dimensions the same as 60–69 series

EG24: Wet-type DC24V coil, with indicator light, surge suppression

N9: Concealed manual emergency button, protection IP65

K4: DIN43650 standard three-core plug

II. Core Technical Parameters

Structure: Two-way four-way, direct-acting, single electromagnet, spring return

Maximum pressure: 31.5 MPa (315 bar)

Rated flow: ≈40 L/min (Δp=5 bar), maximum 80 L/min

Working medium: Mineral hydraulic oil (HL, HM), viscosity ISO VG 10–68

Temperature range: Oil temperature -20℃ to +80℃, environment -30℃ to +60℃

Sealing / Protection: FKM fluorine rubber sealing, IP65

Response time: Powered ≤30 ms, disarmed ≤20 ms

Installation: Plate installation (4×M5 screws)

III. Function Description (D type 4/2)

De-energized (spring position): P→A open, B→T open; no pressure in A and B, return oil

Powered (electromagnet): P→B open, A→T open; actuator reversal

IV. Yaskawa vs. Haldor

Rexroth original: Complete model 4WE6D61/EG24N9K4, part number R900561278

Haldor alternative: Model 4WE6D61B/CG24N9Z5L, fully interchangeable

V. Common Complete Order Models

4WE6D61/EG24N9K4 (DC24V, standard plug)

4WE6D61/CW220-50N9K4 (AC220V)

4WE6D61/EG24N9K4/B12 (with dust cover)

VI. Typical Applications

Small hydraulic station, machine tool fixture, clamping cylinder

Injection molding machine, automation equipment, construction machinery

Control single-acting / double-acting cylinder reversal, start-stop 4WE6D61 (common complete model: 4WE6D61/EG24N9K4)

Brand: Bosch Rexroth (Yaskawa) / Beijing Haldor (domestic substitute)

Type: Direct-acting four-way electromagnet directional valve, 6-way diameter (NG6), single electromagnet, spring return