CWE Rodent Ventilator External Valve Assembly

CWE Incorporated CTP-VA-1 External Valve Assembly – Rodent Size, Multi-Animal Expansion Module for SAR-830 & SAR-1000 Series Ventilators (MPN: 12-04000)

The CWE Incorporated 12-04000 (Model CTP-VA-1) is a specialized, high-precision external solenoid valve assembly engineered to expand the operational capacity of CWE's industry-standard small animal respiratory platforms, including the SAR-830, SAR-830/AP, and SAR-1000 series ventilators. Functioning as a remote slave station, this rodent-sized valve manifold replicates the exact internal pneumatic valve mechanics of the primary ventilator control unit. By interconnecting this module via a control signal cable, research laboratories can scale a single base ventilator to simultaneously ventilate up to five rodents (mice, rats, or guinea pigs) or operate in isolated surgical zones without purchasing multiple standalone mechanical ventilators. Built with fast-acting, low-dead-space solenoids and inert fluidic pathways, the 12-04000 maintains clean, uncompromised tidal volume delivery, precise inspiratory timing, and compatible anesthetic gas delivery across high-throughput preclinical research workflows.

Technical Performance and System Architecture

• Slave Controller Synchronization: Connects directly to the main ventilator chassis via an electrical control cable. The assembly responds instantaneously to the master unit’s electronic timing clock, ensuring synchronized respiratory rates, inspiratory times (%Insp), and pressure-cycled parameters across all active stations.

• Ultra-Low Dead Space Fluidics: Internal flow geometries are optimized specifically for small laboratory rodents (10g to 500g body mass). The minimized internal volume suppresses rebreathing effects and prevents volumetric compression losses during micro-volume tidal air delivery.

• Independent Airflow Control Compatibility: Operates in tandem with an external metered flow source (such as the CWE EFM-1 or EFM-4 flowmeter manifold). This allows researchers to independently tune individual inspiratory flow rates and tidal volumes for each animal connected to the shared control system.

• Inert Anesthetic Gas Compatibility: Built with chemically resistant internal seals and tubing connectors. The entire flow path is fully compatible with common inhalation anesthetics (including Isoflurane and Sevoflurane), compressed oxygen, and room air feeds.

Product Specifications

• Catalog Number / MPN: 12-04000 (Model Designation: CTP-VA-1)

• Manufacturer / Brand: CWE Incorporated

• Product Utility Classification: External Rodent Valve Expansion Assembly / Remote Breathing Station

• Target Animal Weight Range: Mouse, Rat, and Guinea Pig profiles (10 g to 500+ g body mass)

• Compatible Main Platforms: CWE SAR-1000 Advanced Ventilator, SAR-830, SAR-830/A, SAR-830/P, and SAR-830/AP Series

• Maximum System Expansion Limit: Supports setups up to 4 additional external valve modules (5 animals total per ventilator when using the CWE MVA-4 electrical adapter)

• Pneumatic Interface Ports: Standard Luer and flexible barb fittings for inspiration, expiration, and animal airway tubing loops

• Included Hardware Infrastructure: Valve manifold block, master interface electrical connecting cable, and standard breathing line tubing kit

Key Benefits and Applications

• High-Throughput Multi-Animal Screening: Allows parallel respiratory support for up to five mice or rats during high-density pharmacological screens, physiological monitoring, and surgical procedures.

• Isolated and Remote Workstations: Enables the breathing valve to be positioned close to the surgical field or inside specialized containment hoods while keeping the larger main ventilator control box on a separate equipment rack.

• Cost-Effective Lab Scalability: Provides a highly economical path for research facilities to increase their surgical surgical throughput without incurring the cost of multiple standalone ventilator units.

• Versatile Volume or Pressure-Cycled Support: Operates seamlessly in both volume-cycled and pressure-cycled ventilation modes as determined by the master SAR-series controller settings.

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