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Cosmotec NW40 High Vacuum Valve – Precision Bellows Sealing for Industrial Vacuum Systems
- Luis Alberto Fing
- Dec 23, 2025
- 2 min read
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Introduction
High-vacuum systems demand absolute reliability, tight sealing, and long-term operational stability. The NW40 Single Acting Type L High Vacuum Valve (Model: NW40PABV) from Cosmotec is engineered to meet these requirements with precision Japanese manufacturing and proven bellows-seal technology. Designed for vacuum isolation between atmosphere and high-vacuum environments, this valve is ideal for advanced industrial and research applications worldwide
Cosmotec NW40 Vacuum Valve – Engineered for Reliable Vacuum Isolation
The Cosmotec NW40 Vacuum Valve utilizes a robust bellows sealing structure to ensure excellent vacuum performance and ultra-low leakage rates. Its L-type configuration provides installation flexibility while maintaining stable flow control through simple open/close operation.
Basic Technical Specifications
Item | Specification |
Main materials | SUS304 (L type), SUS304L (Y, Z type) |
Flexible / bellows | AM-350 |
Leakage rate (hood section) | < 1.0 × 10⁻¹⁰ Pa·m³/sec |
Leak rate (sheet leakage) | < 1.0 × 10⁻¹⁰ Pa·m³/sec |
RoHS2 corresponding | Yes |
Designed for Industrial and Engineering Applications
This valve is widely used in systems where vacuum integrity is critical and flow adjustment is not required. Engineers benefit from its straightforward operation and durable materials, ensuring long service life even in demanding environments.
Typical application areas include:
Semiconductor manufacturing equipment
Vacuum chambers and research laboratories
Industrial coating and surface treatment systems
High-purity vacuum pipelines
Operational Flexibility with Proven Reliability
The NW40PABV model supports manual and pneumatic actuation options, allowing system designers to select the most suitable configuration. While flow rate adjustment is not supported, the valve ensures precise and repeatable opening and closing—essential for stable vacuum control.
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