Guangdong Yanhui Hydraulic Co., Ltd. is one of the leading manufacturers and suppliers of atos dhi 0631 in China. We warmly welcome you to wholesale bulk atos dhi 0631 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 DHI-0631 is a high-performance, direct-operated solenoid directional control valve engineered for precise fluid direction control in industrial hydraulic systems. Featuring an ISO 4401 size 06 (CETOP 3 / D03) sub-plate mounting interface, it functions primarily to direct, start, and stop fluid flow within high-pressure hydraulic circuits.
Key Advantages
▔▔- High-flow capacity up to 60 l/min paired with a maximum working pressure of up to 350 bar on ports P, A, and B.
- Wet-type threaded solenoids with interchangeable coils suitable for AC or DC power supply.
- Shell-molding casting valve body with wide internal passages to minimize internal pressure drops.
- Modular design supporting various spool types, electrical connections, and optional monitoring microswitches or proximity sensors.
Technical Specifications
▔▔
| Parameter Category | Technical Specification |
| Max Working Pressure (Ports P, A, B) | 350 bar |
| Max Working Pressure (Port T) | 120 bar |
| Nominal Flow Rate | Up to 60 l/min |
| Fluid Temperature Range | -20°C to +80°C (Standard NBR / /PE seals) / -40°C to +60°C (/BT seals) |
| Viscosity Range | 15 to 100 mm²/s (allowed range: 2.8 to 500 mm²/s) |
| Response Time (Typical) | 15–30 ms (energizing) / 10–25 ms (de-energizing) depending on coil and circuit characteristics |
| Switching Frequency | Up to 10,000 cycles/hour |
| Filtration Recommendation | ISO 4406 class 20/18/15 or better, achieved with 25 µm in-line filters |
| Mounting Interface | ISO 4401 size 06 (4 x M5x50 fastening bolts, tightening torque 8 Nm) |
Configuration Options
▔▔
- Structure & Mounting: Direct-operated, 4-way, 2- or 3-position spool design, designed for ISO 4401 size 06 vertical sub-plate stacking configurations.
- Control & Actuation Methods: Single or dual wet-pin solenoids with integrated manual override pin. Available with standard spring offset, detent, or centralized configurations.
- Feedback & Monitoring Options: Optional inductive proximity switches or microswitches (e.g., /FI/NC, /FI/NO) for spool stroke monitoring and safety feedback.
- Flow & Spool Variants: Wide range of interchangeable spools (such as type 0, 1, 3, 5, or specialized restricted/water-hammer dampening profiles) to match specific circuit safety and actuator control needs.
- Electrical Configurations: Standard DIN 43650 (ISO 4400) plug-in connectors with IP65 protection; optional AMP Junior Timer, lead-wire connections, or integrated electronic connectors (E-SR low-power signal switching, E-SD spark/disturbance suppression).
- Voltage Options: Standard DC coils (12VDC, 24VDC) and AC coils (110VAC, 230VAC at 50/60Hz) with insulation Class H.
Key Materials and Components
▔▔
- Valve Body: High-strength shell-molding cast iron with internal passages optimized for minimal flow restriction, treated with external zinc coating and black passivation for robust corrosion resistance.
- Spool: Precision-ground, hardened alloy steel, finely deburred and matched to the valve body bore to minimize internal leakage and maximize wear resistance.
- Solenoid Tube & Plunger: Wet-type screwed steel tube with low-friction guided armature, ensuring high pressure endurance and effective cooling via hydraulic fluid.
- Seals: Standard Nitrile (NBR) rubber for standard mineral oils; optional Fluorocarbon (FKM / /PE) for high temperatures and synthetic fluids; Hydrogenated Nitrile (HNBR / /BT) for low-temperature compatibility.
- Coil Encapsulation: Weatherproof thermoplastic resin encapsulation protecting windings against moisture and dust.
Packaging and Transport Protection
▔▔
- Industrial Packaging: Individually sealed in heavy-duty anti-corrosion polyethylene bags to prevent oxidation and moisture ingress during transit.
- Shock Protection: Packed inside custom high-density molded foam or corrugated compartments to protect external electrical pins, manual overrides, and interface surfaces against mechanical impacts.
- Batch Packing: Outer sturdy double-wall corrugated master cartons reinforced for palletized freight shipping, warehousing, and long-term inventory storage.
- Storage Environment: Recommended storage temperature range from -30°C to +80°C in a dry, ventilated area away from direct sunlight and corrosive chemical fumes.
Applications
▔▔- Machine Tools: Directs hydraulic clamping circuits, slide feeds, and tool turret positioning mechanisms in CNC lathes and machining centers.
- Injection Molding & Die Casting Machines: Controls mold opening/closing sequences, core pulling actuators, and ejection pin actuation with high repeatability.
- Presses & Metal Forming Equipment: Manages pilot circuit switching for large proportional blocks and auxiliary cylinder positioning.
- Marine & Mobile Hydraulics: Regulates winch controls, steering gear deployment lines, and deck crane utility movements requiring reliable outdoor resilience.
Related Models
▔▔
| Model Number | Nominal Size | Actuation / Configuration | Voltage Options | Key Application Feature |
| DHI-0631/2 | ISO 06 (NG06) | Single Solenoid, 2-position, spring offset | 24VDC / 230VAC | Standard directional switching |
| DHI-0631/2/A | ISO 06 (NG06) | Single Solenoid with internal position monitoring | 24VDC | Safety-critical directional control |
| DHI-0631/2P | ISO 06 (NG06) | Spool with leakage-limitation design | 24VDC / 110VAC | Low-internal leakage circuits |
| DHI-0631/FI/NC | ISO 06 (NG06) | With Normally Closed proximity sensor feedback | 24VDC | Automated stroke verification |
| DHU-0631/2 | ISO 06 (NG06) | High-performance North American cURus certified version | 24VDC / 120VAC | Heavy-duty industrial machinery |
FAQ
▔▔Q1: How do I verify and confirm my exact model code?
A: Check the nameplate stamped on the valve body or solenoid coil. Ensure you verify the mounting size (NG06/CETOP 3), spool configuration type (e.g., 631), voltage rating (e.g., 24VDC), and any suffix options like seals (/PE, /BT) or position sensors (/FI).
Q2: What are the required oil cleanliness and filtration levels?
A: Maintain hydraulic fluid cleanliness according to ISO 4406 class 20/18/15 (or NAS 1638 Class 9), utilizing a 25 µm or finer in-line supply filter to ensure long valve life and prevent spool jamming.
Contact Us
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