3DREP6A, 3DREP6B, 3DREP6C Proportional Directional Pressure Reducing Valve

Type Code:

01	Proportional pressure relief valve in 3-way version		3DREP
02	For external analog electronics		no code
	With integrated control electronics		E
03	Size 6		6
Version
04	Type 3DREP6 A 2X/..		A
	Type 3DREP6 B 2X/..		B
	Type 3DREP6 C 2X/..		C
05	Component series 20 ... 29 (20 ... 29: unchanged installation and connection dimensions) - Size 6		2X
Pressure rating
06	16 bar		16
	25 bar		25
	45 bar		45
07	Proportional solenoid with detachable coil		E
Power supply
08	Direct voltage 24 V		G24
09	Without manual override		no code
	With concealed manual override		N93)
10	Without special type of protection		no code
	Sea water-resistant		J2)
Electrical connection
11	For type DREP:	Without mating connector; connector DIN EN 175301-803	K41)
	For type DREPE:	Without mating connector; connector DIN EN 175201-804	K311)
Electrical interface
12	For type DREP:		no code
	For type DREPE:	Command value/actual value ±10 V	A1
		Command value/actual value 4 … 20 mA	F1
Seal material
13	NBR seals		M
	FKM seals		V
14	Further details in the plain text		*
1)	For version "J" = seawater-resistant only indiSAARe "K31"
2)	Only for version 3DREP6
3)	With version “J”, indiSAARe “N” only instead of “N9”
Special electrical types of protection upon request

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Proportional Valve Engineering & Application Overview

Core Performance & Precision Control

The 3DREP6A, 3DREP6B, and 3DREP6C series represent a highly engineered class of direct-acting proportional directional pressure reducing valves. Operating reliably under maximum pressures of up to 100 bar and managing flow capacities of 15 l/min, these components are critical for maintaining fluid stability in demanding hydraulic circuits. By accepting standard electrical inputs of ±10V or 4-20mA, the valve translates electronic commands into precise mechanical spool movements with exceptionally low hysteresis. Operators will notice the immediate, predictable response in actuator speed and force, ensuring that downstream machinery operates with pinpoint accuracy.

This precise fluid metering eliminates erratic pressure spikes that could otherwise compromise system integrity, protecting delicate downstream components from mechanical shock. The internal spring-centered control spool ensures an immediate and accurate return to the neutral position upon signal interruption, providing an essential layer of operational security during complex automated cycles. Key performance metrics include:

• Maximum Operating Pressure: Capable of sustaining up to 100 bar without structural fatigue.

• Flow Capacity: Precisely manages up to 15 l/min for responsive actuator control.

• Signal Translation: Accepts standard ±10V or 4-20mA inputs for accurate spool positioning.

ISO Standardization & System Integration

When upgrading or maintaining complex fluid power infrastructures, physical compatibility dictates project timelines and labor costs. This proportional valve series is meticulously machined to adhere strictly to the ISO 4401 international subplate mounting standard. For procurement and engineering teams, this standardized footprint means the unit integrates directly into existing hydraulic manifolds without the need for custom-machined adapter plates or complex retrofitting procedures.

The precise alignment of the mounting ports ensures a secure, leak-free connection the moment it is bolted down, significantly accelerating installation phases and minimizing mechanical complexity on the facility floor. By eliminating the necessity for piping modifications, facility operators can drastically reduce the labor hours required for system upgrades, allowing maintenance personnel to focus on optimizing other critical areas of the hydraulic power unit.

Material Craftsmanship & Environmental Resilience

Industrial environments subject hydraulic components to extreme thermal and chemical stress on a daily basis. To combat this degradation, the valve is offered with premium NBR or FKM sealing options, providing exceptional chemical stability whether exposed to standard petroleum-based fluids or aggressive synthetic hydraulic oils at elevated temperatures. The heavy metallic construction not only feels substantial but actively resists physical impacts, safeguarding the delicate internal proportional solenoids from environmental hazards.

For offshore, marine, or highly corrosive applications, the specialized seawater-resistant variant features a distinct matte-finish surface treatment. Running a hand over the housing reveals a finely textured, resilient barrier specifically designed to repel salt spray and high humidity. This specialized coating prevents the unsightly accumulation of rust and structural degradation, ensuring long-term reliability in harsh atmospheres and extending the operational lifespan of the entire manifold assembly.

Maintenance Accessibility & Operational Safety

Minimizing operational downtime is a primary objective for any facility manager overseeing continuous production lines. This proportional valve features a heavy-duty solenoid equipped with a uniquely designed detachable coil mechanism. During routine maintenance or electrical troubleshooting, technicians can physically unthread and replace the electromagnetic coil without ever breaking the hydraulic fluid seal. This dry-replacement capability prevents hazardous oil spills, completely avoiding the distinct, pungent odor of hydraulic fluid on the workspace floor and maintaining a clean, safe working environment.

Furthermore, the optional concealed manual override provides a firm, tactile mechanical resistance when actuated. This allows operators to safely engage the spool by hand during emergency scenarios, power loss, or initial commissioning, ensuring continuous mechanical control and providing immediate physical confirmation of spool movement without relying on electronic signals.

Quality Assurance & Factory Calibration

Every single unit undergoes rigorous factory calibration and dynamic pressure testing before it is secured in its shipping crate. The substantial, heavy metallic housing feels dense and solid, a direct result of precision machining tolerances that effectively reduce internal fluid leakage to an absolute minimum. This strict quality control ensures that the valve delivers consistent flow metering and pressure reduction from the very first day of operation.

The audible, crisp engagement of the internal mechanisms during testing reflects the superior craftsmanship, giving engineers total confidence in the component's ability to safeguard critical hydraulic loops. By verifying the exact electrical-to-mechanical translation curves, the factory guarantees that the command values correspond perfectly to the actual pressure outputs, eliminating the need for extensive on-site recalibration and allowing for immediate system deployment.

Supply Chain Reliability & Rapid Deployment

Sourcing specialized fluid control components requires a comprehensive and responsive distribution network that understands the urgency of industrial maintenance. By maintaining an extensive, climate-controlled inventory of the 3DREP6 series—covering various pressure ratings such as 16 bar, 25 bar, and 45 bar, alongside specific spool configurations—we ensure an exceptionally short lead time for urgent replacement needs. Our comprehensive cross-reference database allows procurement specialists to match exact part numbers instantly, eliminating costly guesswork and administrative delays. This operational readiness translates directly to reduced inventory holding costs for your facility and guarantees that your production lines remain active. Facility operators can confidently schedule preventive maintenance, knowing that the exact valve configuration required will arrive precisely when needed, avoiding the severe financial impact of prolonged machinery downtime.

Typical Industrial Applications

The precise fluid metering capabilities of this proportional valve make it an indispensable asset across a wide variety of heavy-duty sectors. It is specifically engineered for integration into the complex hydraulic power units of heavy metallurgical machinery, offshore marine vessels, and advanced industrial automation systems. Engineers designing test rigs, paper processing mills, and automated assembly lines rely on this component to execute delicate, high-stakes mechanical operations safely and efficiently, ensuring that every movement is controlled, repeatable, and completely insulated from upstream pressure fluctuations.

• Metallurgical Machinery: Regulating clamping forces and heavy lifting mechanisms with absolute precision.

• Marine & Offshore: Stabilizing deck cranes and steering systems against unpredictable ocean swells.

• Industrial Automation: Providing repeatable, exact movements in large-scale injection molding and automated assembly lines.