Rexroth Series Manual Control Valves A4VG28-90 HD

6 month ago

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4 year

Product details

1. Product Positioning

TheSauer-Danfoss PV20-24 Manual Control Valveis a high-performance proportional control valve designed byDanfoss Power Solutionsformobile hydraulic systems, catering to applications requiringprecise manual adjustment of flow/pressure(e.g., construction machinery, agricultural equipment, municipal vehicles). Its core advantages include:

• Proportional Control Precision: Stepless flow/pressure adjustment via manual knob (resolution ≤1% FS).

• Compact Design: Integrated valve body and control module to reduce piping connections and leakage risks.

• Environmental Adaptability: IP69K rating (dust/waterproof) for harsh operating conditions (e.g., mud, high temperatures).

Typical Applications:

• Construction Machinery: Boom/arm speed control for excavators, loader attachment adjustment.

• Agricultural Machinery: Hydraulic output (HSO) flow distribution for tractors, reel speed control for harvesters.

• Municipal Vehicles: Pressure regulation for garbage truck compactors, brush speed control for street sweepers.

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2. Key Specifications

【表格】

Parameter PV20-24 Typical Value Unit

Nominal Flow Rate 20 L/min (@100 bar)

Max. Operating Pressure 350 bar

Control Method Manual proportional (knob/lever) -

Response Time ≤50 ms (0 to full scale)

Leakage Class ISO 10770-1 Class IV (internal leakage ≤1% rated flow) -

Operating Temperature -40 ~ +85 ℃

Weight ~1.2 kg

Port Type SAE O-ring (#8 SAE port) -

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3. Technical Features

3.1 Proportional Control Principle

• Manual Adjustment Mechanism:

• Knob Type: 360° rotation for linear flow/pressure changes (clockwise increases, counterclockwise decreases).

• Lever Type: ±15° lever swing for valve spool displacement, suitable for rapid adjustments.

• Spool Design:

• Slide valve structure with ≤3 μm clearance between spool and sleeve for low leakage and high repeatability.

• Spring-centered design for automatic return to neutral (flow closed) when handle is released.

3.2 Integrated Design

• Valve Body Structure:

• Monoblock aluminum casting with built-in pressure compensator (optional) for flow independent of load pressure.

• Ports integratecheck valves(prevents reverse flow) andrelief valves(overpressure protection, set at 350 bar).

• Electrical Interface (Optional):

• Provides4-20mA current feedbackor0-10V voltage signaloutput for system monitoring.

3.3 Reliability Design

• Sealing System:

• Primary seals: Fluororubber (FKM) for high-temperature resistance (200℃) and chemical corrosion resistance.

• Dust wiper: Polyurethane (PU) to block particle intrusion.

• Materials:

• Valve body: High-strength aluminum alloy (6061-T6) with anodized surface treatment.

• Spool: 42CrMo4 alloy steel, quenched (hardness HRC 58-62).

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