Edwards NGW073000 Pneumatic Vacuum Gate Valve

The Edwards NGW073000 Pneumatic High Vacuum Gate Valve is an isolation valve designed to provide high-conductance shut-off in high-vacuum systems. Manufactured by Edwards Vacuum and equipped with a heavy-duty Humphrey 410-70 solenoid valve for pneumatic pilot actuation, the unit controls gas flow and isolates process chambers from vacuum pumping stacks. Furthermore, its streamlined gate design minimizes flow restrictions, thereby ensuring optimal pumping speeds during critical processing stages.

Edwards NGW073000 Operational Mechanism and Actuation

Vacuum gate valves are essential for isolating sensitive processing chambers without causing downstream contamination or conductance bottlenecks. In contrast to angle or butterfly valves, the sliding gate configuration of the NGW073000 moves completely clear of the vacuum path when opened.

• Linear Gate Travel: The gate mechanism retracts fully into the valve body upon actuation. As a result, it provides an unobstructed straight-through aperture that maximizes pumping conductance.
• Pneumatic Solenoid Control: Actuation is driven by an industrial Humphrey 410-70 pilot solenoid valve. Therefore, the valve achieves rapid, repeatable opening and closing cycles under automated system control.
• Bellows-Sealed Shaft: A stainless steel welded bellows assembly isolates the internal vacuum from atmospheric pressure during shaft movement. Consequently, this eliminates sliding shaft seal leaks and minimizes particle generation.

Edwards NGW073000 Technical Specifications

• Product Type: Pneumatic high-vacuum gate valve
• Manufacturer: Edwards Vacuum
• Model Number: NGW073000
• Pilot Actuation: Humphrey 410-70 electric solenoid valve
• Seal Mechanism: Viton O-ring gate seal with welded stainless steel bellows feedthrough
• Vacuum Compatibility: High-vacuum down to ultra-high vacuum (UHV) regimes
• Body Construction: Cast aluminum or stainless steel housing with machined vacuum sealing surfaces

System Integration and Reliability

The NGW073000 assembly provides robust vacuum isolation while simplifying electrical and pneumatic integration:

• Fail-Safe Operation: The pneumatic cylinder and return mechanism ensure predictable valve seating. Thus, the system protects process chambers during unexpected power interruptions.
• Automated Integration: In addition, the Humphrey solenoid valve readily interfaces with automated PLCs, vacuum interlocks, and digital controller networks.
• Low Particulate Generation: Moreover, smooth linkage motion and bellows containment prevent mechanical abrasion within the vacuum envelope.

Primary Application Scope

Consequently, the Edwards NGW073000 gate valve is installed across industrial and research environments requiring reliable vacuum isolation:

• Isolation between turbomolecular or diffusion pumps and process chambers
• Semiconductor wafer processing and physical vapor deposition (PVD) chambers
• Vacuum furnace and annealing systems
• Surface analysis equipment and electron microscopy roughing/high-vacuum stages

Ultimately, the Edwards NGW073000 pneumatic gate valve delivers dependable vacuum isolation, rapid pneumatic response, and minimal conductance loss across demanding vacuum systems.