DGMX1-3-PP-BW-B-40-EN12 Modular Relief Valve
2 month ago
Product details
1. Model Code Definition
Code Description
DGM General code for Danfoss Vickers SystemStak modular valve series
X1 Combined pressure reducing & relief function with underlap construction; pressure regulation at P port and automatic relief upon overpressure
3 NG06 (D03) size, conforming to ISO4401-03 / NFPA D03 modular stacking standard
PP Pressure regulation on P inlet, overpressure relief from P port directly back to T tank
BW B stands for pressure setting range: 30~70 bar (3~7 MPa); W means external screw & locknut adjustment fitted on valve side B
B Standard NBR nitrile rubber seal; S denotes optional FKM fluorocarbon seal
40 Valve design revision code
EN12 EU specification with BSP threaded gauge ports complying with European installation standards
Brand: Danfoss Vickers (Former Eaton Vickers, US origin)
2. Key Technical Specifications
1. Pressure Rating
- Adjustable set pressure: 30~70 bar (3~7 MPa)
- Max allowable valve working pressure: 315 bar (4500 PSI)
- Equipped with remote control port for remote unloading & remote pressure adjustment via external solenoid valve
2. Flow Capacity
- Rated maximum flow: 60 L/min (16 gpm); minimum stable controlled flow: 3 L/min
3. Seal & Fluid Compatibility
- Standard NBR seals for mineral hydraulic oil; optional for water-glycol and synthetic hydraulic fluids
- Recommended oil viscosity: 15~100 mm²/s @40℃; operating temperature: -20℃ ~ +80℃
4. Weight: Approx. 1.0kg, cast iron valve body
3. Construction & Operating Principle (Dual-function: Reducing + Relief)
1. Two-stage pilot & main spool integrated modular design with dual functions:
- Reducing Mode: Fluid enters from P port; internal throttling stabilizes downstream pressure regardless of fluctuating inlet supply pressure.
- Relief Mode: Spool opens automatically when downstream pressure exceeds set value; excess oil flows from P to T for overload protection.
2. External screw adjustment: Rotate end screw to change spring preload for stepless pressure setting; locknut prevents pressure drift caused by vibration.
3. Stack-mounted directly underneath directional valves without separate subplate to save manifold space.
4. Suffix Function Variants
- PA: A-port pressure reducing, P-port relief; PB: B-port reducing, P-port relief; PP: P-port reducing & relief (this model)
- AW/CW: Internal hex socket adjustment; BW/FW: External screw knob adjustment
- B = Standard NBR seal; S = High-temperature & chemical-resistant FKM seal
5. Typical Applications
Machine tool hydraulic power units, auxiliary circuits of injection molding machines, fixture hydraulic systems and compact hydraulic packs. Widely used for independent branch pressure stabilization and branch overload protection in multi-circuit hydraulic systems.
6. Series Classification
- DGMX1: 1st generation underlap design with low internal leakage; DGMX2: 2nd generation overlap design with superior low-pressure stability
- DGMC: Pure modular relief valve without reducing function; DGMR: Modular counterbalance valve; DGMFN: Modular flow control throttle valve
I. Product Overview
TheDGMX1-3-PP-BW-B-40-EN12is a modular relief valve manufactured by renowned hydraulic component makers (such as Vickers and similar brands with comparable models). Featuring a sandwich-plate design, it can be easily integrated into hydraulic systems for stable pressure control.
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II. Product Features
1. Modular Design
• As a cartridge valve, the DGMX1-3-PP-BW-B-40-EN12 can be directly stacked with other hydraulic components without additional connecting blocks, simplifying system structure and reducing installation costs.
2. High-Precision Control
• Ensures stable system pressure with superior pressure regulation accuracy.
3. Fast Response
• Quickly adapts to system pressure changes by adjusting the valve port opening to maintain stable pressure.
4. High Reliability
• Constructed with premium materials and advanced manufacturing processes for durability and long service life.
5. Multiple Pressure Ratings Available
• Offers various pressure options to meet the requirements of different hydraulic systems.
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III. Technical Specifications
• Model: DGMX1-3-PP-BW-B-40-EN12
• Nominal Pressure: Typically up to 25 MPa or higher (varies by manufacturer)
• Flow Range: Determined by specific model and port size
• Applicable Medium: Hydraulic oil
• Operating Temperature Range: 30°C to 90°C (varies by manufacturer)
• Connection Type: Sandwich-plate mounting, compliant with ISO 4401 standards
• Control Method: Pilot-operated
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IV. Working Principle
The operating principle of theDGMX1-3-PP-BW-B-40-EN12modular relief valve is consistent with that of a typical pilot-operated relief valve. When system pressure rises and reaches the valve's set pressure, the pilot valve opens, altering the pressure differential across the main spool. Under this pressure difference, the main spool overcomes spring force and friction to shift leftward, opening the valve port. This allows the relief valve to overflow at a predetermined pressure, thereby maintaining stable system pressure.
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V. Applications
TheDGMX1-3-PP-BW-B-40-EN12modular relief valve is widely used in hydraulic systems requiring precise pressure control, such as:
• Injection Molding Machines: For controlling injection and holding pressures to improve product quality.
• Machine Tools: For regulating feed system pressure to achieve precision machining.
• Metallurgical Equipment: For controlling roll gap pressure to ensure rolling accuracy.
• Construction Machinery: For managing actuator pressure to enhance operational efficiency.
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