Pinch valve WL-0838

electrically-actuatedelectricflow control

Product Overview
The WL-0838 medical pinch valve is a precision tubing pinch valve engineered for sterile, contamination-free handling of liquids in medical and laboratory equipment. The valve controls flow by compressing disposable flexible tubing, eliminating direct fluid contact with internal components. It is designed for compact integration into diagnostic analyzers, infusion/IV systems, dialysis equipment and laboratory automation.

Key Features

• Sterile, contamination-free fluid path — fluid contacts only the disposable tubing.
• High-precision flow control suitable for dosing, sampling and microfluidic tasks.
• Fast response and quiet electronic actuation; compatible with solenoid or motor-driven actuators.
• Compact footprint for space-constrained medical devices and analyzers.
• Low operating and maintenance cost — tubing is replaceable as a consumable.
• Compatible with multiple tubing sizes and materials; designed for disposable tubing kits.

Applications

• IV/infusion systems and precise dosing devices.
• Dialysis machines, blood processors and extracorporeal systems.
• Diagnostic analyzers, laboratory automation, sampling and microfluidics.
• Sterile transfer, filling and controlled dispensing in pharmaceutical production and biotech research.
• Environmental sampling, reagent injection and other fluid handling tasks requiring cleanliness and repeatability.

Advantages / Disadvantages
Advantages

• Contamination-free fluid path when used with disposable tubing.
• No internal fluid stagnation; full-bore flow when valve is open.
• Effective sealing for slurries and particulate-laden fluids when appropriate tubing is used.
• Simple maintenance — typically only tubing replacement required.
• Fail-safe behavior: closes the tube to stop flow.

Disadvantages

• Tubing is a consumable and requires periodic replacement.
• Lower maximum pressure rating compared with some rigid valve types.
• Requires external tubing (not a direct port-to-port valve).
• Performance depends on tubing dimensional consistency and material selection.
• Actuation force and power demand can increase with larger tubing or higher pinch pressure.

Caractéristiques / Spécifications techniques

• Product name / model: Medical Equipment Pinch Valve WL-0838
• Temperature range (standard test conditions): -20°C to +65°C
• Relative humidity (standard test conditions): 5% to 60% RH
• Rated voltage: DC 24V ±10%
• Power consumption: 6 W (DC 24V, coil resistance ≈ 96 Ω ±10%)
• Operation / Duty cycle: Normally Open solenoid configuration, ED 50%
• Operating pressure range: 0 kPa to 100 kPa
• Insulation resistance: DC 500V, ≥ 50 MΩ (between coil and bobbin/frame)
• Dielectric strength (high voltage test): AC 700V, 50/60Hz for 1 s (max leakage current: 1 mA between coil and housing)
• Service life: ≥ 500,000 cycles (test condition: DC 24V, operation 3s ON + 3s OFF = 1 cycle)
• Hose / tubing specification (typical load): silicone tube; outer diameter 4.0 mm; inner diameter 2.0 mm; hardness 40 Shore
• Typical application notes: compatible with disposable tubing kits for sterile use; suitable for blood, saline, medicines and similar fluids when appropriate tubing is used; avoid strongly caustic fluids unless special tubing is specified
• Control / integration: typically actuated by solenoids or motor-driven actuators; ensure voltage and control-signal compatibility (microcontroller, PLC, PWM or digital I/O)