DGMFN-3-Y-A2W-B2W-41 Vickers Modular Throttle Valve

Product Overview

Models such as DGMFN-3-Y-A2W-B2W-41, DGMFN-3-Y-A2W-41 and DGMPC-3-ABK-BAK-41 belong to the Eaton Vickers (now Danfoss) SystemStak series of modular throttle/flow control valves and pilot-operated check valves. Featuring adjustable non-compensated throttling with integral check (or pilot-operated check), they comply with ISO 4401 (NG6) mounting standards. Every unit undergoes rigorous 100% simulated operating-condition testing and offers excellent drop-in interchangeability for stacking directly between directional valves and subplates. Precise flow restriction and reliable load-holding capability enable accurate actuator speed and position control in medium-to-high-pressure hydraulic systems.

Technical Specifications 

• Model examples: DGMFN-3-Y-A2W-B2W-41, DGMFN-3-Y-A2W-41, DGMPC-3-ABK-BAK-41
• Valve type: Modular (sandwich) throttle/flow control valve (DGMFN); pilot-operated check valve (DGMPC)
• Nominal size: 3 = NG6 (D03)
• Mounting interface: ISO 4401
• Control type: Y = Meter-out; X = Meter-in
• Maximum operating pressure: 315 bar
• Maximum flow: approx. 60 L/min
• Adjustment type: Screw with locknut (W) or handknob
• Seal material: Viton or NBR
• Weight: approx. 1.1 kg
• Recommended fluid cleanliness: 19/17/14
• Operating temperature: approx. –20 °C to +80 °C

Key Technical Advantages

1. Modular sandwich design: Stacks directly between directional valve and subplate/manifold, saving space and eliminating additional piping leakage points for compact, efficient system layouts.
2. Integrated throttle and check/lock function: Precise flow restriction in one direction with free reverse flow or pilot unlocking, ideal for actuator speed control and load holding.
3. Excellent drop-in interchangeability: Strict compliance with ISO 4401 mounting face allows direct replacement of equivalent SystemStak modules, minimizing modification costs and downtime.
4. High pressure and reliable adjustment: Rated to 315 bar with precise adjustment mechanism for stable, repeatable settings.
5. Precision machining and long service life: Hardened steel internal components and high-strength body deliver low internal leakage, strong contamination resistance and long-term reliability.

Application Areas

Injection moulding machines, die-casting machines, metal-forming equipment, machine-tool hydraulics, packaging machinery, automated production lines, mobile equipment and other medium-to-high-pressure hydraulic circuits requiring precise actuator speed control and load holding.

Expert Maintenance Tips

1. Ensure mounting surfaces are clean and flat before installation; fit seals correctly and tighten specified bolts evenly to the recommended torque to prevent external leakage.
2. Maintain recommended fluid cleanliness; use hydraulic fluids compatible with the installed seal material. Verify adjustment position before first start-up.
3. To adjust flow, loosen the locknut and turn the adjusting screw slowly (clockwise to decrease flow); re-tighten the locknut after setting.
4. Periodically inspect the valve body and adjustment mechanism for leakage or sticking; clean and protect sealing surfaces during long-term storage.
5. Do not disassemble internal throttle and check valve components. Seal replacement or repairs should be performed only by experienced technicians; always perform functional tests before returning the valve to service.