DHZE-A-071-L5 10/PE ATOS Proportional Directional Valve 350 bar 70 L/min

Series Overview

ATOS is a leading Italian manufacturer of hydraulic components. Its proportional and servo proportional valve product line covers the complete application spectrum from open-loop control to high-performance closed-loop control. This page covers six major ATOS proportional/servo proportional valve series: DHZE, DHZO, DKZOR, DLOH/DLOK, DLHZO, and DLKZOR.

Series Positioning and Core Differences (listed):

• DHZE: No transducer, positive overlap spool, no position sensor, NG06 size, max pressure 350 bar, application: open-loop directional control.

• DHZO: Optional LVDT transducer, positive overlap spool, optional position sensor, NG06 size, max pressure 350 bar, application: high-performance open/closed loop.

• DKZOR: LVDT transducer, positive overlap spool, LVDT position sensor, NG10 size, max pressure 315 bar, application: high-performance directional control.

• DLOH/DLOK: Poppet type, leak-free sealing, no position sensor, NG06 size, max pressure 350 bar (DLOH) / 315 bar (DLOK), application: leak-free on/off control.

• DLHZO: Sleeve execution, zero overlap spool, LVDT position sensor, NG06 size, max pressure 350 bar, application: servo proportional high dynamics.

• DLKZOR: Sleeve execution, zero overlap spool, LVDT position sensor, NG10 size, max pressure 315 bar, application: servo proportional large flow.

All ATOS series proportional/servo proportional valves supplied are genuine ATOS original products, ensuring 100% interchangeability with original equipment. Every unit undergoes rigorous application-specific simulation testing prior to shipment to guarantee optimal performance in your actual operating conditions.

Series 1: DHZE — Direct Operated Proportional Directional Valve without Transducer

Product Overview

The DHZE series is ATOS’ direct operated proportional directional valve without position transducer, featuring positive overlap spool for open-loop directional control and uncompensated flow regulation. The DHZE series features a 3-chamber valve body and operates with off-board electronic drivers (E-MI-AC-01F, E-MI-AS-IR, etc.). Solenoids are cURus certified according to North American standards.

The DHZE-A-071-L5 10/PE is an NG06 configuration suitable for precise directional and flow control in small to medium flow hydraulic systems.

Technical Specifications (Bulleted List)

• Model: DHZE-A-071-L5 10/PE

• Valve Type: Direct Operated Proportional Directional Valve

• Position Transducer: None

• Spool Overlap: Positive Overlap

• Nominal Size: NG06 – ISO 4401

• Body Chambers: 3-chamber

• Max. Operating Pressure: 350 bar

• Max. Flow Rate: 65 – 70 L/min

• Spool Type: L5 – Linear flow characteristic

• Sealing Material: PE = FPM / FKM

• Actuation: Proportional solenoid

• Supply Voltage: 24V DC (standard)

• Mounting Interface: ISO 4401 standard NG06

• Weight: Approx. 2.0 kg

Model Code Decoding (DHZE-A-071-L5 10/PE):

• DHZE = NG06 direct operated proportional directional valve

• A = For off-board driver

• 0 = ISO 4401 mounting size (0 = NG06)

• 71 = Valve body configuration (standard)

• L5 = Spool type (L = linear characteristic; 5 = spool size)

• 10 = Series number

• PE = FPM/FKM seal material

Key Technical Advantages

1. Positive Overlap Spool Design: The DHZE series employs positive overlap spool design, with P, A, B, T ports all overlapped at neutral position. This ensures reliable closure at neutral position, minimizing internal leakage and making it suitable for position-holding open-loop control systems.

2. Flexible Off-Board Driver Configuration: The DHZE series operates with ATOS off-board electronic drivers, supporting both analog (E-MI-AC-01F) and digital (E-MI-AS-IR, E-BM-AS-PS, E-BM-AES) driver options. Users can flexibly select the driver type based on system control requirements.

3. Multiple Spool Characteristics Available: The DHZE series offers linear (L), progressive (S), and differential-progressive (D) spool regulation characteristics. The L5 spool (linear characteristic) provides flow output proportional to the input signal, ideal for applications requiring precise flow control.

4. 3-Chamber Valve Body Design: The DHZE series features a 3-chamber valve body, offering compact construction and light weight (approx. 2.0 kg). The 3-chamber design reduces internal flow path complexity, minimizes pressure losses, and improves valve response speed.

Application Areas

• Injection molding machine hydraulic system open-loop directional and flow control

• Machine tool hydraulic system actuator speed control

• Packaging machinery hydraulic drive control

• General industrial equipment hydraulic directional and flow regulation

Expert Maintenance Tips

• The DHZE series does not include a position transducer and relies on off-board driver current control for spool positioning. Periodically calibrate the relationship between driver output current and spool stroke.

• System fluid cleanliness should meet ISO 4406 standard 19/17/14 or better. Positive overlap spools are sensitive to fluid contamination—filtration accuracy of 10 μm or better is recommended.

• Mounting surface finish should achieve Ra ≤ 0.8 μm, with Ra 0.4 μm recommended, and flatness 0.01/100 mm.

• The DHZE series operates with off-board drivers—ensure proper driver mounting location and heat dissipation to prevent high-temperature effects on electronic component reliability.

Series 2: DHZO — High-Performance Proportional Directional Valve (Optional LVDT)

Product Overview

The DHZO series is ATOS’ high-performance direct operated proportional directional valve, available with optional LVDT position transducer for closed-loop control or without transducer for open-loop control. The DHZO series features positive overlap spool design, delivering excellent directional control and uncompensated flow regulation performance.

The DHZO series offers multiple amplifier configurations:

• DHZO-A: Without amplifier, for off-board driver

• DHZO-AEB: With on-board digital driver (basic), IO-Link interface

• DHZO-AES: With on-board digital driver (full), fieldbus interfaces

• DHZO-T: With LVDT position transducer

Technical Specifications (Bulleted List)

• Series: DHZO

• Valve Type: Direct Operated Proportional Directional Valve

• Position Transducer: Optional LVDT (T-type)

• Spool Overlap: Positive Overlap

• Nominal Size: NG06 – ISO 4401

• Max. Operating Pressure: 350 bar

• Max. Flow Rate: 80 L/min

• Spool Characteristics: L = Linear / S = Progressive / D = Differential-Progressive

• Max. Solenoid Current: 2.6 A

• Coil Resistance (at 20°C): 3 – 3.3 Ω

• Supply Voltage: 24V DC

• Mounting Interface: ISO 4401 standard NG06

• Assembly Position: Any position

• Weight: Approx. 2.3 kg

Key Technical Advantages

1. LVDT High-Precision Position Feedback (T-type): The DHZO-T series features an LVDT position transducer enabling high-precision closed-loop spool position control. The LVDT provides non-contact measurement with infinite resolution, high repeatability, and extended service life, ensuring precise correlation between spool position and input signal.

2. Flexible Amplifier Configurations: The DHZO series offers off-board (A-type), on-board basic (AEB-type) , and on-board full (AES-type) amplifier configurations. AEB supports IO-Link interface for digital reference signals and real-time diagnostics; AES supports CANopen, PROFIBUS DP, EtherCAT, POWERLINK, EtherNet/IP, PROFINET fieldbus interfaces.

3. Bluetooth/USB Smart Commissioning: AEB and AES on-board drivers feature Bluetooth/USB connectivity for parameter setting and real-time diagnostics via Atos CONNECT mobile App and E-SW-SETUP PC software. Quick access to valve main functional parameters is possible without physical cable connection, significantly reducing commissioning time.

4. Positive Overlap for High Stability: Positive overlap design provides a defined closed state at neutral position, reducing spool oscillation tendency near neutral and improving open-loop control system stability.

5. Zero Overlap Special Version: DHZO-A/AEB/AES-060 offers a zero overlap special version with zero overlap at center position. This version is particularly suitable for mobile machinery and sky-lifts requiring cost-effective closed-loop position control.

Application Areas

• Injection molding machine hydraulic system closed-loop position, velocity, and pressure control (T-type)

• Mobile machinery and sky-lift hydraulic control (zero overlap version)

• Press and forging equipment precision motion control

• Machine tool hydraulic servo systems

• Industry 4.0 hydraulic systems requiring digital communication (AES-type)

Expert Maintenance Tips

• The DHZO-T features an LVDT transducer—avoid impact or mechanical damage to the transducer area during installation and removal.

• System fluid cleanliness should meet ISO 4406 standard 19/17/14 or better. Positive overlap spools are sensitive to fluid contamination—filtration accuracy of 10 μm or better is recommended.

• Mounting surface finish should achieve Ra ≤ 0.8 μm, with Ra 0.4 μm recommended, and flatness 0.01/100 mm.

• AEB/AES on-board drivers are factory-preset to ensure excellent performance and valve-to-valve interchangeability. For reconfiguration, use Atos CONNECT App or E-SW-SETUP software.

Series 3: DKZOR — High-Performance Proportional Directional Valve (NG10)

Product Overview

The DKZOR series is ATOS’ NG10 high-performance direct operated proportional directional valve—the large-flow version of the DHZO series. The DKZOR series features an LVDT position transducer and positive overlap spool, delivering excellent directional control and uncompensated flow regulation performance. The DKZOR series features a 5-chamber valve body, supporting higher flow capacity.

The DKZOR series offers multiple amplifier configurations:

• DKZOR-A: Without amplifier, for off-board driver

• DKZOR-T: With LVDT position transducer

• DKZOR-TEB: With on-board digital driver (basic)

• DKZOR-TES: With on-board digital driver (full), fieldbus support

Technical Specifications (Bulleted List)

• Series: DKZOR

• Valve Type: Direct Operated Proportional Directional Valve

• Position Transducer: LVDT (T-type)

• Spool Overlap: Positive Overlap

• Nominal Size: NG10 – ISO 4401

• Body Chambers: 5-chamber

• Max. Operating Pressure: 315 bar

• Pressure Limits: P, A, B = 315 bar; T = 210 bar

• Max. Flow Rate: 180 L/min

• Nominal Flow: 75 L/min (at Δp=10 bar P-T)

• Spool Characteristics: L = Linear / S = Progressive / D = Differential-Progressive

• Max. Solenoid Current: 3 A

• Coil Resistance (at 20°C): 3.8 – 4.1 Ω

• Supply Voltage: 24V DC

• Mounting Interface: ISO 4401 standard NG10

• Weight: Approx. 5.0 kg

Key Technical Advantages

1. High Flow Capacity: The DKZOR series delivers maximum flow of 180 L/min—more than double the DHZO series (80 L/min). NG10 design meets the directional control requirements of high-flow hydraulic systems.

2. LVDT High-Precision Closed-Loop Control: Equipped with LVDT position transducer for high-precision closed-loop spool position control. The LVDT’s non-contact measurement principle ensures long-term stability and high repeatability even under harsh operating conditions.

3. 5-Chamber Valve Body Design: The DKZOR series features a 5-chamber valve body with optimized internal flow paths, reducing pressure losses and improving valve response speed and control accuracy under high-flow conditions.

4. Flexible Amplifier and Fieldbus Support: The DKZOR-TES full execution supports multiple fieldbus interfaces (CANopen, PROFIBUS DP, EtherCAT, POWERLINK, EtherNet/IP, PROFINET) for seamless integration into modern industrial automation networks. Bluetooth/USB connectivity is always present for parameter setting and diagnostics via mobile App and PC software.

5. cURus Certified Solenoids: DKZOR series solenoids are cURus certified according to North American standards, meeting safety requirements for the North American market.

Application Areas

• Large injection molding machine hydraulic system directional and flow control

• Press and forging equipment high-flow hydraulic control

• Metallurgical equipment (rolling mills) hydraulic control systems

• Marine and offshore hydraulic systems

• Test equipment high-flow dynamic control

Expert Maintenance Tips

• The DKZOR series is NG10—verify mounting interface matches ISO 4401 standard NG10 before installation.

• System fluid cleanliness should meet ISO 4406 standard 19/17/14 or better. The high-flow characteristics of the DKZOR series make it particularly sensitive to fluid contamination—filtration accuracy of 10 μm or better is recommended.

• Mounting surface finish should achieve Ra ≤ 0.8 μm, with Ra 0.4 μm recommended, and flatness 0.01/100 mm.

• Maximum T port pressure is 210 bar. Ensure T port back pressure does not exceed this limit—use external drain (Y port) if necessary.

• For TEB/TES on-board drivers, use Atos CONNECT mobile App (via Bluetooth) or E-SW-SETUP PC software for parameter setting and diagnostics.

Series 4: DLOH / DLOK — Poppet Type Leak-Free Direct Operated Solenoid Valves

Product Overview

DLOH and DLOK are ATOS poppet type, two-position direct operated solenoid valves designed for hydraulic systems with leak-free requirements. DLOH/DLOK are available in 2/2-way or 3/2-way configurations.

The core difference between DLOH and DLOK is flow rating:

• DLOH: NG06, max flow 12 L/min, max pressure 350 bar

• DLOK: NG06, max flow 30 L/min, max pressure 315 bar

DLOH/DLOK are operated by wet type solenoids with fully encapsulated coils (Class H insulation) . Standard configuration is 24V DC. Optional manual override (/WP) is protected by a rubber cap.

Technical Specifications (Bulleted List)

• Series: DLOH / DLOK

• Valve Type: Poppet Type Direct Operated Solenoid Valve

• Sealing Principle: Poppet type seat sealing, leak-free

• Nominal Size: NG06 – ISO 4401

• Spool Function: 2/2-way (DLOH only) or 3/2-way

• Max. Operating Pressure: DLOH=350 bar / DLOK=315 bar

• Max. Flow Rate: DLOH=12 L/min / DLOK=30 L/min

• Solenoid Type: Wet type

• Supply Voltage: 24V DC (standard)

• Coil Insulation Class: Class H

• Mounting Interface: ISO 4401 standard NG06

• Assembly Position: Any position

• Ambient Temperature: -20°C to +70°C

• Recommended Viscosity: 15 – 100 mm²/s at 40°C (ISO VG 15 – 100)

• Fluid Contamination Class: ISO 4406 class 21/19/16

Key Technical Advantages

1. Zero-Leakage Poppet Sealing: DLOH/DLOK employ poppet type seat sealing delivering absolute zero leakage in the closed position. For hydraulic systems requiring long-term pressure holding (clamping systems, presses, accumulator circuits), this significantly reduces system pressure loss and improves energy efficiency.

2. Cartridge Spool Construction: Cartridge-type spool design enables multiple configurations through simple spool replacement. This greatly simplifies inventory management and on-site maintenance—DLOH cartridges are also available as loose parts for manifold mounting.

3. Optional Switching Time Control: DLOH/DLOK can be equipped with switching time control devices (/L1, /L2, /L3) for adjusting valve switching time, reducing hydraulic shock and improving system operation smoothness.

4. Multiple Safety and Functional Options: /S option (no manual operation, poppet overlapped at intermediate position) for safety applications; /R option (check valve on P port) for reverse flow prevention; /WP option (prolonged manual override) for on-site commissioning and maintenance.

5. SIL 3 Safety Level Certification: The DLOH series complies with SIL 3 safety level, suitable for hydraulic control systems with extremely high safety requirements.

Application Areas

• Hydraulic clamping and tooling system pressure holding control

• Accumulator circuit isolation and discharge control

• Press hydraulic system safety shutoff

• Lubrication system supply control

• Precision hydraulic systems requiring absolute zero leakage

Expert Maintenance Tips

• DLOH/DLOK are poppet type zero-leakage designs with high fluid cleanliness requirements. System fluid cleanliness should meet ISO 4406 class 21/19/16 or better.

• Mounting surface finish should achieve Ra 0.4 μm with flatness 0.01/100 mm.

• Poppet type structures are sensitive to shock and vibration—ensure secure valve mounting to prevent sealing surface damage from vibration.

• /WP manual override is a prolonged type protected by a rubber cap. Ensure the rubber cap remains intact during daily use to prevent dust and moisture ingress.

• For safety circuit applications (/S option), perform regular functional tests to verify reliable valve closure upon de-energization.

Series 5: DLHZO — Servo Proportional Directional Valve (NG06, Sleeve Execution, Zero Overlap)

Product Overview

The DLHZO series is ATOS’ NG06 high-performance servo proportional directional valve featuring sleeve execution and zero overlap spool design. The DLHZO series is equipped with an LVDT position transducer for high-precision closed-loop spool position control.

Core technical features of the DLHZO series:

• Sleeve Execution: Spool slides within a precision-machined and hardened sleeve for exceptional metering accuracy

• Zero Overlap Design: Extremely high sensitivity near the null position

• LVDT Closed-Loop Control: Precise correlation between spool position and input signal

The DLHZO series offers multiple amplifier configurations:

• DLHZO-T: With LVDT position transducer (for off-board driver)

• DLHZO-TEB: With on-board digital driver (basic)

• DLHZO-TES: With on-board digital driver (full), P/Q control and fieldbus

• DLHZO-TEZ: With on-board digital driver + axis controller

Technical Specifications (Bulleted List)

• Series: DLHZO

• Valve Type: Servo Proportional Directional Valve

• Valve Execution: Sleeve Execution

• Spool Overlap: Zero Overlap

• Position Transducer: LVDT

• Nominal Size: NG06 – ISO 4401

• Max. Operating Pressure: 350 bar

• Max. Flow Rate: 70 L/min

• Spool Characteristics: L = Linear / S = Progressive / D = Differential-Progressive

• Max. Solenoid Current: 2.6 A

• Coil Resistance (at 20°C): 3 – 3.3 Ω

• Supply Voltage: 24V DC

• Mounting Interface: ISO 4401 standard NG06

• Assembly Position: Any position

• Weight: Approx. 2.3 kg

Key Technical Advantages

1. Sleeve Execution High-Precision Fit: The DLHZO series features sleeve execution—the spool slides within a precision-machined and hardened sleeve. The sleeve is pressed into the valve body, ensuring precise fit between spool and sleeve, minimizing internal leakage, and maximizing volumetric efficiency and control accuracy.

2. Zero Overlap for Extremely High Sensitivity: Zero overlap design provides extremely high sensitivity near the null position. Minimal spool displacement produces flow changes, making it ideal for high-precision position, velocity, and pressure closed-loop control applications.

3. LVDT Closed-Loop High-Precision Control: Equipped with LVDT position transducer for high-precision closed-loop spool position control. The LVDT provides non-contact measurement with infinite resolution, high repeatability, and extended service life, ensuring precise correlation between spool position and input signal.

4. P/Q Control Capability (TES-type): The DLHZO-TES full execution supports P/Q control—adding force limitation to position closed-loop control. With pressure or force transducers installed, automatic switching between position control and force control is possible—ideal for complex applications such as injection molding machines and presses.

5. Smart Start-up and Autotuning: The DLHZO-TEZ series supports Autotuning and Smart Tuning functionalities. Through Atos CONNECT mobile App and E-SW-SETUP PC software, valve start-up and parameter optimization can be completed quickly, significantly reducing commissioning time.

Application Areas

• Injection molding machine hydraulic system high-precision position, velocity, and pressure closed-loop control

• Press and forging equipment precision motion control

• Wind turbine pitch control systems

• Test benches and dynamic simulation equipment high-frequency response control

• Metallurgical equipment (rolling mills) hydraulic automatic gauge control (AGC)

• Complex hydraulic systems requiring P/Q control (TES-type)

Expert Maintenance Tips

• The DLHZO series features sleeve execution + zero overlap design with extremely tight spool-to-sleeve clearance—extremely sensitive to fluid contamination. System fluid cleanliness should meet ISO 4406 standard 19/17/14 or better, with filtration accuracy of 5 μm or better recommended.

• The LVDT position transducer is a precision component—avoid impact or mechanical damage to the transducer area during installation and removal.

• Mounting surface finish should achieve Ra ≤ 0.8 μm, with Ra 0.4 μm recommended, and flatness 0.01/100 mm.

• TES/TEZ on-board drivers are factory-preset to ensure excellent performance and valve-to-valve interchangeability. For reconfiguration, use Atos CONNECT App (via Bluetooth) or E-SW-SETUP PC software.

• For P/Q control applications (TES-type), install pressure or force transducers on the hydraulic actuator. Ensure proper transducer selection and mounting position for accurate and reliable signals.

Series 6: DLKZOR — Servo Proportional Directional Valve (NG10, Sleeve Execution, Zero Overlap)

Product Overview

The DLKZOR series is ATOS’ NG10 high-performance servo proportional directional valve—the large-flow version of the DLHZO series. The DLKZOR series also features sleeve execution and zero overlap spool design, equipped with LVDT position transducer for high-precision closed-loop control.

The DLKZOR series offers the same amplifier configurations as DLHZO:

• DLKZOR-T: With LVDT position transducer (for off-board driver)

• DLKZOR-TEB: With on-board digital driver (basic)

• DLKZOR-TES: With on-board digital driver (full), P/Q control and fieldbus

• DLKZOR-TEZ: With on-board digital driver + axis controller

Technical Specifications (Bulleted List)

• Series: DLKZOR

• Valve Type: Servo Proportional Directional Valve

• Valve Execution: Sleeve Execution

• Spool Overlap: Zero Overlap

• Position Transducer: LVDT

• Nominal Size: NG10 – ISO 4401

• Max. Operating Pressure: 315 bar

• Pressure Limits: P, A, B = 315 bar; T = 210 bar

• Max. Flow Rate: 130 L/min

• Spool Characteristics: L = Linear / S = Progressive / D = Differential-Progressive

• Max. Solenoid Current: 3 A

• Coil Resistance (at 20°C): 3.8 – 4.1 Ω

• Supply Voltage: 24V DC

• Mounting Interface: ISO 4401 standard NG10

• Assembly Position: Any position

• Weight: Approx. 4.3 – 4.7 kg

Key Technical Advantages

1. High-Flow Servo Proportional Control: The DLKZOR series delivers maximum flow of 130 L/min—nearly double the DLHZO series (70 L/min). NG10 design meets high-precision closed-loop control requirements of high-flow hydraulic systems.

2. Sleeve Execution + Zero Overlap High Precision: Features sleeve execution and zero overlap design with precision-machined and hardened sleeve for exceptional control accuracy and dynamic response.

3. LVDT Closed-Loop High-Precision Control: Equipped with LVDT position transducer for high-precision closed-loop spool position control. The LVDT’s non-contact measurement principle ensures long-term stability and high repeatability.

4. P/Q Control Capability (TES-type): The DLKZOR-TES full execution supports P/Q control—adding force limitation to position closed-loop control. With pressure or force transducers installed, automatic switching between position control and force control is possible.

5. Smart Start-up and Autotuning: The DLKZOR-TEZ series supports Autotuning and Smart Tuning functionalities. Through Atos CONNECT mobile App and E-SW-SETUP PC software, valve start-up and parameter optimization can be completed quickly.

Application Areas

• Large injection molding machine hydraulic system high-precision closed-loop control

• Heavy press and forging equipment precision motion control

• Metallurgical equipment (rolling mills) hydraulic automatic gauge control (AGC)

• Marine and offshore hydraulic servo systems

• Wind turbine pitch control systems

• Industrial hydraulic systems requiring high-flow high-precision closed-loop control

Expert Maintenance Tips

• The DLKZOR series features sleeve execution + zero overlap design with extremely tight spool-to-sleeve clearance—extremely sensitive to fluid contamination. System fluid cleanliness should meet ISO 4406 standard 19/17/14 or better, with filtration accuracy of 5 μm or better recommended.

• The LVDT position transducer is a precision component—avoid impact or mechanical damage to the transducer area during installation and removal.

• Mounting surface finish should achieve Ra ≤ 0.8 μm, with Ra 0.4 μm recommended, and flatness 0.01/100 mm.

• Maximum T port pressure is 210 bar. Ensure T port back pressure does not exceed this limit—use external drain (Y port) if necessary.

• TES/TEZ on-board drivers are factory-preset. For reconfiguration, use Atos CONNECT App (via Bluetooth) or E-SW-SETUP PC software.