Atos AGIR AGIS AGIU Proportional Valve | AGIR-10/100 AGIU-10/100 Valve

Genlu Hydraulic proudly introduces our AGIR, AGIS, and AGIU Series (comprising Sizes 10, 20, and 30) high-performance, pilot-operated electrohydraulic proportional pressure control valves. This premier product family is custom-engineered to meet the rigorous engineering benchmarks of Atos proportional technology, specifically developed for the stepless, precision scaling of main circuit oil pressures in automated manufacturing. Within the matrix, AGIR designates proportional pressure reducing functionality, AGIS handles proportional relief operations, and AGIU delivers a combined proportional relief and multi-stage solenoid decompression valve circuit. Our high-fidelity production lineup perfectly encompasses industry-standard codes including AGIR-10/100-51, AGIU-10/100, and large-bore AGIRR-32/100 variants.

Serving as the precise “pressure tuning control center” for heavy industrial fluid power packs, Genlu unequivocally guarantees 100% Drop-in Interchangeability in ISO 6264 standard subplate configurations, proportional coil impedance traits, peak volumetric throughput flow deltas, and pressure linearity profiles relative to original Atos components. Backed by our uncompromising 100% Simulation Load Testing, each proportional manifold assembly is validated across continuous 35 MPa duty loops to confirm microsecond step responses and ultra-low hysteresis parameters.

Technical Specifications 

• Product Series: Atos AGIR / AGIS / AGIU Pilot-Operated Proportional Pressure Valve Series

• Target Configuration Codes: AGIR-10/100-51, AGIU-10/100, AGIRR-32/100

• Nominal Interface Sizes: NG10 (Size 10 standard), NG25 (Size 20), NG32 (Size 30)

• Max Continuous Operating Pressure: 35 MPa (350 bar)

• Pressure Calibration Range: Scaled up to 10 MPa (Represented by code /100) / 21 MPa (/210) / 31.5 MPa (/315)

• Max Volume Throughput Capacity: Up to 160 L/min for Size 10 ；scales up to 400 L/min for Size 32

• Rated Command Driver Current: 0 – 1.6 A DC (Tailored for standard E-ME-AC or E-MI-AC digital drivers)

• Functional Architecture Classification: AGIR (Reducing) ；AGIS (Relief) ；AGIU (Relief with solenoid unloading)

• Hysteresis & Repeatability Margins: Hysteresis $\le$ 1.5% ；Repeatability tracking $\le$ 1.0%

Key Technical Advantages:

• Shock-Resistant Wet-Pin Proportional Solenoid: Features an encapsulated, heavy-duty pressure-tight wet armature assembly. Internal channels are optimized to damp sudden system fluid oscillations, ensuring the coil generates consistent linear electromagnetic force output even under high-frequency alternating duty.

• Flow-Optimized Monoblock Cast Core Galleries: The valve cast shell is modeled with fluid-dynamic galleries to achieve high flow capacity with minimal delta-p. The primary spool is paired with calibrated jet orifices, enabling ultra-fast response times ($\le$ 45 ms) while dampening fluid squeal or high-frequency acoustic ripples.

• Vacuum-Hardened Poppet-and-Seat Pilot Mechanism: The critical pilot stage poppet and seat mating surfaces are forged from premium tool steel and treated via advanced vacuum case hardening (above HRC 60). This provides superior barrier protection against fluid cavitation and high-velocity erosion, preventing pressure threshold drift over millions of operational cycles.

• Low-Hysteresis Smooth Magnetic Core Saturation: The internal coil armature slides inside its housing on tight micron tolerances, utilizing low-coercivity ferromagnetic materials. When paired with Genlu or original control card amplifiers, the ramp controls execute smoothly without any step-jumps during critical system transitions.

Application Areas:

• Heavy Forging Press & Metal Die-Casting Machinery: Real-time proportional clamp pressure profiling on injection molding units, multi-stage shot controls for die-casters, and main pressure regulation on industrial forming presses.

• Steel Metallurgy Milling & Processing Lines: High-load clamping stations for billet shearing machines, blast furnace auxiliary circuit safety, and constant-tension hydraulic controls for cold/hot rolling mills.

• Pulp & Paper Plants & Specialized Compression Units: Proportional pressure setting arrays for calender rollers and heavy multi-axis composite molding presses.

Expert Maintenance Tips:

• Isolate Pilot Case Drain (Port Y) to Zero Pressure: Pilot-operated proportional pressure valves are highly vulnerable to parasitic backpressure spikes on Port Y (external pilot drain) or internal return lines. Plumb a dedicated drain pipe straight to the reservoir without any check valves or shared lines. Every 0.1 MPa of backpressure on Port Y induces a non-linear shift in main circuit relief settings.

• Enforce High-Efficiency Hydraulic Fluid Sanitation: Proportional manifolds are high-precision components. If microscopic metal particles or contaminants lodge in the pilot seat, the valve will fail to reach full pressure settings; debris in the main spool orifice triggers heavy pressure oscillations and spool locking. Always integrate a dedicated high-pressure line filter rated $\le$ 10μm with a filtration ratio $\beta_{10} \ge 75$.

• Calibrate a Proper Dither Signal on the Electronic Driver: To cancel the mechanical static friction inherent inside the proportional armature sleeve, the paired amplifier driver must inject a calibrated dither current (recommended frequency set between 100 Hz and 160 Hz). This keeps the armature in a state of micro-vibration, ensuring smooth and linear pressure tracking.