JTEKT Manual Directional Control Valve HD3-42MG-BGA-03A
Brand: JTEKT (formerly TOYOOKI)Model: HD3-42MG-BGA-03AOrigin: Japan
HD3-42MG-BGA-03A is a size 03 (CETOP5 / NG10) manual directional control valve from JTEKT’s (formerly TOYOOKI) HD3 series. It features a spool structure, subplate mounting and positioning device, designed for manual control of hydraulic flow direction in hydraulic systems.Manufacturer: JTEKT Fluid Power Systems Co., Ltd.
1. Complete Model Code Interpretation (Structured)
| Segment | Code | Industrial Standard Definition |
|---|
| Series | HD3 | HD series manual directional valve; 3 = Size 03 (NG10 / CETOP5, larger flow rate and port size) |
| Number of Ports | 4 | 4-way ports (P: inlet, T: return, A: working port, B: working port) |
| Operation Type | M | Lever manual operation (L = hand grip type, M = lever type) |
| Mounting Type | G | Subplate mounting (gasket type, requires mounting subplate) |
| Spool Type | BGA | Spool structure code; B = standard type, G/A = internal flow passage design, spring centering / positioning configuration |
| Size Suffix | 03A | 03 = dimensional size; A = compliant mounting interface standard, interchangeable with size 03A solenoid valve mounting dimensions |
2. Core Technical Specifications
| Item | Specification | Description |
|---|
| Maximum Working Pressure | 21 MPa | Continuous operating pressure limit of the system |
| Rated Flow Rate | 40 L/min | Recommended continuous flow; slightly higher peak instantaneous flow is allowable |
| Allowable Back Pressure | 17 MPa | Maximum allowable back pressure on T port return line |
| Port Configuration | 4-way (P/T/A/B) | Size 03 corresponds to NG10 ports, requires SHD03 series mounting subplate |
| Structure Type | Spool type | Manual switching, position holding (no spring return) |
| Weight | Approx. 4.8 kg | Net valve weight including handle and positioning mechanism |
| Mounting Surface Roughness | ≤ 3.2 μm Rz | Machining requirement for valve-subplate contact surface to ensure sealing performance |
3. Key Functions & Features
Lever Manual Operation: Stable lever-type switching with reliable positioning, suitable for fixed-position manual control.
Position Holding Device: Maintains selected position after switching without continuous force applied, ideal for applications requiring sustained flow direction (clamping, positioning, etc.).
Size 03 High Flow Capacity: Larger bore than size 02, rated flow up to 40 L/min, compatible with medium-to-large hydraulic actuators (large-bore cylinders, hydraulic motors).
Interchangeable Subplate Mounting: Identical mounting dimensions to size 03A solenoid valves, enabling quick replacement/upgrade; no modification to mounting base when converting to electric drive later.
High Pressure Resistance: 21 MPa rating covers most industrial hydraulic systems (machine tools, injection molding machines, hydraulic power units) and meets medium-high pressure working conditions.
4. Application & Fluid Compatibility
Typical Applications: Machine tool hydraulic systems, injection molding machines, hydraulic power units, small hydraulic circuits for construction machinery, fixture positioning control systems.
Applicable Fluids: Mineral hydraulic oil, water-glycol hydraulic fluid, environmentally friendly hydraulic oil (seal compatibility to be confirmed separately).
Operating Oil Temperature Range: -20℃ ~ +80℃ (NBR seal version).
5. Size 03 Series Model Selection Comparison
| Model | Operation Type | Spool Type | Core Differences |
|---|
| HD3-42MG-BGA-03A | Lever manual | BGA | Position holding, 4-way, size 03 (this model) |
| HD3-42LG-BGA-03A | Hand grip manual | BGA | Grip operation, others same as above |
| HD3-43MG-BGA-03A | Lever manual | BGA | 3-way (no T port), for single-acting cylinders |
| HD3-42MG-BDA-03A | Lever manual | BDA | Different internal flow passage, for specific circuits |
6. Installation & Matching Notes
Mandatory mounting subplate: SHD03-T1A or SHD03-T3A series subplate (select according to flow circuit layout), sold separately.
Sealing & ports: Mounting surface finished to 3.2 μm Rz; standard hydraulic ports P/T/A/B, sealing performance determined by subplate.
Replacement & upgrade: Fully interchangeable with size 03A solenoid valves (e.g. HD3-3W-BGA-03A), direct replacement for electric drive retrofit.
Full Model List (Unchanged Original Codes)
HD1-R42LTD-ACB-02HD3-42MG-BCA-03AHD3-42MG-BGA-03AHD3-42MG-KCP-03AHD3-42MG-BDA-03AHD3-42MG-BD1A-03AHD3-43LG-BCA-03AHD3-43LG-AEB-03AHD3-43LG-BDA-03AHD3-43LG-BMA-03AHD3-43LG-BGA-03AHD3-42LG-BCA-03AHD3-42LG-BDA-03AHD3-42LG-BGA-03AHD3-43LGD-BCA-03AHD3-43LGD-AEB-03AHD3-43LGD-BDA-03AHD3-43LGD-BMA-03AHD3-43LGD-BGA-03AHD3-42LGD-BCA-03AHD3-42LGD-BDA-03AHD3-42LGD-BGA-03A
Translation Specification
All hydraulic terms adopt European & Japanese hydraulic industry official English
All original model letters/symbols completely retained
Removed all redundant Japanese text fragments
Format consistent with your previous HD1E valve English document, easy for catalog/brochure use
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