Product Overview
The YUKEN MBB-01-H-70 / MBA-01-H-70 is a modular relief valve assembly from YUKEN’s MBB/MBA series, engineered for direct sandwich mounting between a directional control valve and its subplate in ISO-compliant hydraulic manifolds. The MBB-01-H-70 functions as a modular relief valve with integrated check functionality, while the MBA-01-H-70 serves as the corresponding modular relief valve module within the same stacking interface. Both units operate on a balanced poppet/seat principle, providing precise system pressure limitation and overload protection without disturbing the main directional valve circuit. The modular (sandwich) design allows pressure control to be inserted or removed from an existing valve stack without re-piping, making these valves a standard choice for machine builders requiring flexible, space-efficient hydraulic circuit architecture.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Modular Relief Valve (Sandwich / Stack-Mounted Pressure Control Valve) |
| Model Designation | MBB-01-H-70 / MBA-01-H-70 |
| Valve Size | 01 (ISO 4401 / CETOP 3 / NG6 interface) |
| Pressure Adjustment Range | H range — up to 70 bar (model code “70” denotes maximum set pressure) |
| Operating Pressure | Standard industrial grade, rated to valve series maximum (up to 315 bar system pressure at port P) |
| Adjustment Type | Manual pressure adjustment (hex-key / screw type per YUKEN modular series) |
| Mounting & Connection | Sandwich mounting between directional valve and subplate, ISO 4401-03 interface, tie-rod or bolt-through assembly |
| Sealing | NBR O-ring face seals (standard); FKM available for high-temperature service |
| Fluid Compatibility | Mineral-based hydraulic oils (ISO VG 32–68), viscosity 15–400 cSt |
Engineering Features & Advantages
- Precision Pressure Limiting: Balanced poppet and seat geometry delivers accurate, repeatable cracking pressure and low hysteresis across the full adjustment range, protecting downstream actuators and components from pressure spikes.
- Modular Sandwich Architecture: The 01-size sandwich body integrates directly into an existing ISO 4401-03 valve stack, enabling pressure control to be added, changed, or removed without disturbing piping or manifold connections.
- Integrated Check Function (MBB Series): The MBB variant incorporates a check element that permits free flow in one direction while blocking reverse flow, combining relief and check duties in a single compact module.
- Industrial Reliability: Constructed for continuous duty with durable, corrosion-resistant materials and proven engineering for maximum system uptime.
- Direct Fit Replacement: Precision-manufactured to original YUKEN specifications for direct replacement, minimising downtime and eliminating fitment issues.
Typical Industrial Applications
This modular relief valve (sandwich / stack-mounted pressure control valve) is widely used in industrial hydraulic power units, machine tools, presses, and general automation systems where reliable, precise performance is required.
PRODUCT IMAGES
YUKEN MBB-01-H-70 / MBA-01-H-70 Modular Relief Valve
⚡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
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- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine YUKEN MBB-01-H-70 / MBA-01-H-70 Solenoid Directional Control Valve. This Japan-made hydraulic component features a wet armature design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.