The STAR Series 650 Servo Proportional Valve delivers precise performance and reliability for demanding hydraulic applications. Engineered with advanced features and durable construction, it is suitable for a wide range of 3-way and 4-way applications.
Key Features:
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Rated Flow: Up to 80 l/min
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Maximum Operating Pressure: 315 bar
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Mounting Pattern: ISO 10372-04-04-0-92
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Pilot Supply: Internal (4-port configuration)
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Performance: High spool drive forces
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Design: Spool-in-bushing for enhanced durability
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Torque Motor: Dry torque motor with mechanical feedback for consistent performance
Benefits and Features:
Sapphire Ball-in-Slot Design:
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Incorporated into STAR designs since 1988
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Provides billions of cycles per service life
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Increases spool life through spool rotation
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Ultra-low coefficient of friction with sapphire-to-steel contact
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Feedback mechanism remains unaffected by spool rotation
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Extended warranties available for added assurance
Safety:
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Flameproof and intrinsically safe design
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Compliance with Class, Division & Zone safety standards
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Mechanical failsafe functionality
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Double and triple coil redundancy for increased reliability
Quality:
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Independent audit process ensures quality
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Focus on meeting customer needs and expectations
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Timely delivery schedules
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Continuous improvements in product design and manufacturing
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Integrity in design and manufacturing processes
Custom Spool Lap & Bushing Port Geometries:
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Options include zero overlap, overlap (closed center), underlap (open center), dual gain, and asymmetric gain
Special Projects:
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Compact servo designs
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Special interfaces and modular components
Sapphire Flow:
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Ensures first-stage stability
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Precisely matched flow properties
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Long lifespan in extreme environments
Sealing Materials:
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Available options: Nitrile, Fluorocarbon (Viton), Ethylene-Propylene, Fluorosilicone
Special Connectors:
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MIL-C-5015
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MIL-DTL-38999
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Conduit-style male/female connectors
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Hermetic sealing options
Technical Data:
Hydraulic:
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Nominal Flow Ratings: [±20%] at 70 bar ∆p: 4, 10, 20, 40, 60, 80 l/min
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Operating Pressure (Max): 315 bar (Ports P, C1, C2, R)
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Fluid Viscosity Range: 10 to 100 mm²/s (cSt)
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Recommended Fluid Types: Mineral oil (ISO 11158, DIN 51524), MIL-H-5606, kerosene, water glycols
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Filter Rating: Pressure line β₁₀ = 200 (10 µm abs), non by-pass & indicator; Off-line β₂ = 1000 (2 µm abs)
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Fluid Cleanliness: ISO 4406:1999 16/14/11
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Operational Parameters:
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Hysteresis: ≤ 5.0% (without dither)
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Threshold: ≤ 2.0% (without dither)
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Null Shift (∆T 40°C): ≤ 3.0%
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Internal Leakage (140 bar supply):
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4, 10 l/min: ≤ 1.5 l/min
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20, 40, 60, 75 l/min: ≤ 2.5 l/min
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Load Pressure Difference: 1% input equals 40% of supply pressure
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Response Time: 0-100% rated spool stroke in 25 ms
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Mounting Pattern: ISO 10372-04-04-0-92 (without X port)
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Mounting Position: Any, fixed or movable
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Weight: Standard unit: 1.1 kg
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Design Protection: EN 60529 IP65
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Shipping Protection: Sealed base plate
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Vibration: 30 g all axes, 5 Hz to 2,000 Hz
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Shock: 30 g all axes
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Temperature Range: -30°C to 135°C
Electrical:
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Rated Input (±mA): Single (differential): 8, 15, 30, 40, 100, 200
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Coil Resistance (Ω) per Coil: 1000, 200, 300, 80, 28, 22
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Power (W): Single: 0.064, 0.045, 0.27, 0.128, 0.280, 0.88
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Connector Type: MIL-C-5015 MS3102E-14S-2P (other options available)
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Connector Orientation: Standard: P port (C1, C2, or R port options available on request)