STAR Series 650 Servo Proportional Valve

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:

• Rated Flow: Up to 80 l/min

• Maximum Operating Pressure: 315 bar

• Mounting Pattern: ISO 10372-04-04-0-92

• Pilot Supply: Internal (4-port configuration)

• Performance: High spool drive forces

• Design: Spool-in-bushing for enhanced durability

• Torque Motor: Dry torque motor with mechanical feedback for consistent performance

Benefits and Features:

Sapphire Ball-in-Slot Design:

• Incorporated into STAR designs since 1988

• Provides billions of cycles per service life

• Increases spool life through spool rotation

• Ultra-low coefficient of friction with sapphire-to-steel contact

• Feedback mechanism remains unaffected by spool rotation

• Extended warranties available for added assurance

Safety:

• Flameproof and intrinsically safe design

• Compliance with Class, Division & Zone safety standards

• Mechanical failsafe functionality

• Double and triple coil redundancy for increased reliability

Quality:

• Independent audit process ensures quality

• Focus on meeting customer needs and expectations

• Timely delivery schedules

• Continuous improvements in product design and manufacturing

• Integrity in design and manufacturing processes

Custom Spool Lap & Bushing Port Geometries:

• Options include zero overlap, overlap (closed center), underlap (open center), dual gain, and asymmetric gain

Special Projects:

• Compact servo designs

• Special interfaces and modular components

Sapphire Flow:

• Ensures first-stage stability

• Precisely matched flow properties

• Long lifespan in extreme environments

Sealing Materials:

• Available options: Nitrile, Fluorocarbon (Viton), Ethylene-Propylene, Fluorosilicone

Special Connectors:

• MIL-C-5015

• MIL-DTL-38999

• Conduit-style male/female connectors

• Hermetic sealing options

Technical Data:

Hydraulic:

• Nominal Flow Ratings: [±20%] at 70 bar ∆p: 4, 10, 20, 40, 60, 80 l/min

• Operating Pressure (Max): 315 bar (Ports P, C1, C2, R)

• Fluid Viscosity Range: 10 to 100 mm²/s (cSt)

• Recommended Fluid Types: Mineral oil (ISO 11158, DIN 51524), MIL-H-5606, kerosene, water glycols

• Filter Rating: Pressure line β₁₀ = 200 (10 µm abs), non by-pass & indicator; Off-line β₂ = 1000 (2 µm abs)

• Fluid Cleanliness: ISO 4406:1999 16/14/11

• Operational Parameters:

  • Hysteresis: ≤ 5.0% (without dither)

  • Threshold: ≤ 2.0% (without dither)

  • Null Shift (∆T 40°C): ≤ 3.0%

  • Internal Leakage (140 bar supply):

    • 4, 10 l/min: ≤ 1.5 l/min

    • 20, 40, 60, 75 l/min: ≤ 2.5 l/min

  • Load Pressure Difference: 1% input equals 40% of supply pressure

  • Response Time: 0-100% rated spool stroke in 25 ms

• Mounting Pattern: ISO 10372-04-04-0-92 (without X port)

• Mounting Position: Any, fixed or movable

• Weight: Standard unit: 1.1 kg

• Design Protection: EN 60529 IP65

• Shipping Protection: Sealed base plate

• Vibration: 30 g all axes, 5 Hz to 2,000 Hz

• Shock: 30 g all axes

• Temperature Range: -30°C to 135°C

Electrical:

• Rated Input (±mA): Single (differential): 8, 15, 30, 40, 100, 200

• Coil Resistance (Ω) per Coil: 1000, 200, 300, 80, 28, 22

• Power (W): Single: 0.064, 0.045, 0.27, 0.128, 0.280, 0.88

• Connector Type: MIL-C-5015 MS3102E-14S-2P (other options available)

• Connector Orientation: Standard: P port (C1, C2, or R port options available on request)