Guangdong Yanhui Hydraulic Co., Ltd. is one of the leading manufacturers and suppliers of atos dpzo in China. We warmly welcome you to wholesale bulk atos dpzo for sale here from our factory. If you have any enquiry about pricelist and quotation, please feel free to email us.
Product Overview
▔▔The Atos DPZO series consists of two-stage proportional directional valves designed for high-performance electro-hydraulic control systems. Functioning as pilot-operated proportional direction and speed control valves, the DPZO series regulates hydraulic fluid flow direction and rate in direct proportion to an electrical input signal. Positioned as a premium industrial-grade solution within the Atos proportional valve lineup, the DPZO series excels in heavy-duty, high-flow, and high-pressure applications where direct-operated valves reach their capacity limits.
Technical Specifications
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| Technical Parameter | Specification / Value |
| Max Operating Pressure | Ports A, B, P: up to 350 bar; Port T: up to 210 bar (external drain) / 160 bar (internal drain) |
| Maximum Flow Rate |
Size 10 (DPZO-A-1...): up to 180 L/min
Size 16 (DPZO-A-2...): up to 350 L/min
Size 25 (DPZO-A-3...): up to 680 L/min
Size 32 (DPZO-A-4...): up to 1100 L/min |
| Recommended Fluid Viscosity | 20 to 100 mm²/s (Operating range: 15 to 380 mm²/s) |
| Fluid Temperature Range | -20°C to +60°C (Standard NBR seals); -20°C to +80°C (FKM / Viton seals) |
| Hysteresis | < 1% of maximum stroke (digital LVDT integrated control models) |
| Response Time | 20 ms to 60 ms (depending on valve size and pilot supply pressure) |
| Repeatability | < 0.1% to 0.5% |
| Recommended Filtration Level | ISO 4406 class 18/16/13 (using 10 µm absolute filter element) |
Configuration Options
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- Structure: Two-stage construction featuring a direct-operated pilot valve mounted on a main stage body. Available with optional internal or external pilot pressure supply and pilot drain.
- Control Type: Analog control (+/-10V, 4-20mA) or Digital On-Board Electronics (OBE) supporting fieldbus communications (CanOpen, PROFIBUS DP, EtherCAT).
- Feedback Mechanism: Open-loop control (DPZO-A models) or closed-loop position control with high-precision LVDT spool position sensors (DPZO-TEB, DPZO-TES models).
- Rated Flow Spool Profiles: Linear flow spools, progressive flow spools, and symmetrical/asymmetrical flow configurations to accommodate diverse cylinder differential ratios.
- Mounting Interface: ISO 4401 subplate mounting (Size 10, Size 16, Size 25, Size 32 / CETOP 05, 07, 08, 10).
- Electrical Configuration: 7-pin or 12-pin main connectors; IP65/IP67 ingress protection rated connector plugs.
Key Materials and Components
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- Hardened Steel Valve Spool and Sleeve: Main stage and pilot spools are manufactured from hardened alloy steel, micro-ground to sub-micron tolerances to guarantee minimal internal leakage, high wear resistance, and long-term positioning accuracy under extreme operating pressures.
- Ductile Iron Body: Main valve bodies are cast from high-strength ductile cast iron (GJS-400), offering exceptional structural integrity, vibration dampening, and resistance to high-pressure shock spikes.
- FKM (Viton) / NBR Seals: Standard models utilize high-grade NBR O-rings for mineral oils, while option /PE specifies Viton (FKM) fluorocarbon seals for phosphate ester synthetic fluids and elevated working temperatures.
Packaging and Transport Protection
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- Anti-Corrosion Treatment: Internal valve cavities are coated with rust-inhibiting oil, and all fluid ports are sealed with heavy-duty plastic plugs.
- Vapor Barrier Packaging: Each valve is sealed in a moisture-proof, anti-static VCI (Vapor Corrosion Inhibitor) polybag containing desiccant packs.
- Shock-Absorbing Protection: Valves are encased in custom high-density polyethylene foam cradles inside reinforced double-wall corrugated cartons.
- Bulk & Palletized Transport: Large orders or heavy-tonnage Size 25/32 valves are secured onto IPPC-certified wooden pallets, edge-protected, wrapped in stretch film, and strapped to withstand marine and air freight hazards.
Applications
▔▔- Plastic Injection Molding Machines: Used for precise multi-stage velocity control during mold clamping and injection strokes to eliminate mechanical impact and short shots.
- Metal Stamping Presses and Forging Equipment: Applied in main cylinder speed profiling and cushion cylinder pressure/position synchronization.
- Die Casting Machinery: Provides rapid flow acceleration and tight speed control during metal shot injection cycles.
- Steel Rolling Mills: Used in hydraulic roll gap adjustment (AGC systems) and side guide position control under severe continuous duty cycles.
- Wood Processing & Plywood Presses: Enables smooth proportional synchronization of multi-cylinder press platens to prevent platen tilting.
Related Models
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| Valve Model | Size / Interface | Feedback Type | Control / Electronics Type |
| DPZO-A-171-L5 | Size 10 / CETOP 05 | Open-Loop | External Amplifier Driver Required |
| DPZO-A-273-S5 | Size 16 / CETOP 07 | Open-Loop | External Amplifier Driver Required |
| DPZO-TEB-SN-NP-271-L5 | Size 16 / CETOP 07 | Closed-Loop (LVDT) | Basic On-Board Digital Electronics |
| DPZO-TES-SN-NP-373-D5 | Size 25 / CETOP 08 | Closed-Loop (LVDT) | Full Digital On-Board Electronics (Analog / Fieldbus) |
| DPZO-TES-SN-NP-473-L5 | Size 32 / CETOP 10 | Closed-Loop (LVDT) | Full Digital On-Board Electronics |
FAQ
▔▔Q1: How do I verify the correct model code for replacing an existing DPZO valve?
A1: Check the full model code printed on the valve nameplate. Pay close attention to the size suffix, spool code (e.g., L5, S5, D5), seal type, pilot configuration (internal/external supply and drain), and driver type (A for analog external, TEB/TES for digital on-board).
Q2: What cleanliness level and oil filtration are required for Atos DPZO valves?
A2: Proportional valves require high fluid cleanliness. We recommend maintaining fluid cleanliness at ISO 4406 class 18/16/13 or cleaner, using an absolute 10-micron filter inline before the valve.
Q3: What type of hydraulic fluid is suitable for DPZO valves?
A3: Standard mineral-based hydraulic oils (HLP / HM) conforming to DIN 51524 are standard. For fire-resistant fluids such as phosphate esters, specify the /PE option with Viton seals.
Contact Us
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