Danfoss Eaton Vickers Manual Adjustable Relief Valve CG2V
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Danfoss Eaton Vickers Manual Adjustable Relief Valve (CG2V Series) in Hydraulic Systems
TheCG2V seriesby Danfoss Eaton Vickers represents a line ofmanual adjustable relief valvesdesigned for precise pressure control inhydraulic systems. These valves are critical components that protect hydraulic equipment from overpressure by diverting excess fluid flow when system pressure exceeds a preset limit.
Key Features of the CG2V Series Hydraulic Valve
1. Manual Pressure Adjustment
• The CG2V series allows operators to manually set the relief pressure via a locking screw or knob, enabling flexible adaptation to varying system requirements.
• Adjustment ranges typically span2–35 bar (30–500 psi)to5–330 bar (75–4,780 psi), depending on the model.
2. High Response and Stability
• The valve’s design ensures rapid response to pressure spikes, maintaining stable outlet pressure even under fluctuating inlet conditions.
• A built-in check valve prevents backflow, enhancing reliability in dynamic hydraulic systems.
3. Compact and Modular Design
• The CG2V series features a compact, cartridge-style construction compatible with international standard mounting surfaces (e.g., ISO 4401).
• This design simplifies integration into existing hydraulic systems and supports parallel installation for multi-valve configurations.
4. Durable Construction
• Made from high-grade materials like cast iron or steel, these valves withstand harsh operating environments, including temperatures ranging from-40°C to 80°C (-40°F to 176°F).
• Seals and internal components are engineered for minimal leakage and extended service life.
Applications in Hydraulic Systems
The CG2V series is widely used in:
• Mobile Hydraulics: Excavators, loaders, and agricultural machinery, where precise pressure control is essential for safety and efficiency.
• Industrial Hydraulics: Press machines, injection molding equipment, and hydraulic power units requiring overload protection.
• Marine and Offshore: Systems exposed to corrosive environments, thanks to robust valve construction.
Technical Specifications (Example: CG2V-8GW-10)
【表格】
Parameter Value
Max. Pressure 350 bar (5,075 psi)
Flow Capacity Up to 300 L/min (80 US gpm)
Adjustment Range 5–70 bar (75–1,000 psi)
Port Sizes B (Inlet), A (Outlet), Y (Drain)
Weight Approx. 2.5–5 kg (depending on model)
Advantages in Hydraulic System Design
• Energy Efficiency: Reduces pressure losses by maintaining optimal system pressure, lowering energy consumption.
• Safety: Prevents component failure due to overpressure, minimizing downtime and maintenance costs.
• Versatility: Compatible with a wide range of hydraulic fluids, including mineral oils, water-glycol, and synthetic fluids.
Comparison with Alternative Valves
Compared to direct-acting relief valves, the CG2V series offers:
• Higher Flow Capacity: Suitable for medium-to-high flow systems without sacrificing pressure stability.
• Better Precision: Pilot-operated design ensures more accurate pressure regulation than simple direct-acting valves.
1. Product Overview
The CG2V series is a direct-acting, subplate-mounted, manually adjustable relief valve from Danfoss Eaton Vickers. As a critical hydraulic valve, it is primarily used to limit the maximum working pressure in a hydraulic system, serving the dual functions of safety protection and pressure regulation. This valve relies on spring force to directly balance hydraulic pressure, offering fast response and a robust structure.
2. Model Code Meaning (Taking CG2V-6**W as an example)
· C: Pressure control valve category
· G: Subplate mounting (manifold connection)
· 2: Direct-acting relief function
· V: Manual pressure adjustment, with locking handle (or handwheel)
· 6: Nominal port size; common sizes include size 6 (CG2V-6) and size 8 (CG2V-8)
· W: Pressure adjustment range code (e.g., F, G, H, W, corresponding to different pressure ranges; W typically stands for the highest range up to 350 bar)
3. Core Function
In any reliable hydraulic system, when the pressure rises abnormally due to load changes or a valve blockage, this hydraulic valve will automatically open and divert excess pressure oil back to the tank, thereby preventing overload damage to the pump, piping, or actuators. By rotating the adjustment handle on top, the system pressure setting can be steplessly changed within the rated range.
4. Main Technical Parameters
· Maximum Operating Pressure: Generally up to 350 bar (varies by pressure range code)
· Common Pressure Adjustment Ranges:
· F: 0.5 – 70 bar
· G: 3.5 – 140 bar
· H: 3.5 – 210 bar
· W: 3.5 – 350 bar
· Maximum Flow Rate: CG2V-6 approx. 20 L/min; CG2V-8 approx. 60 L/min (specific values depend on spring and pressure differential)
· Fluid: Mineral hydraulic oil conforming to ISO grades
· Mounting Style: Standard subplate mounting; mounting surface conforms to ISO 4401
5. Features and Benefits
· Direct-Acting Fast Response: Pressure builds up directly, excellent dynamic characteristics, suitable for use as a safety valve.
· Manual Adjustment with Locking: Equipped with a lock nut or handwheel, allowing intuitive stepless on-site adjustment.
· Subplate Connection: Compact structure, easy to integrate into the manifold blocks of various hydraulic systems.
· Multiple Pressure Ratings: By changing the spring or selecting different codes, the valve can precisely match the pressure requirements of different systems.
6. Typical Applications
As a standard hydraulic valve, the CG2V series is widely used in stationary or mobile hydraulic systems that require precise pressure limiting, such as:
· Machine tool hydraulic power units
· Injection molding machine power units
· Lubrication system pressure control
· Marine and port machinery
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