Vacuum Valve

Q: What is the difference between a gate valve and an angle valve in terms of conductance?

Gate valves provide a straight-through, unobstructed path offering the highest possible conductance, making them ideal for main pumping line isolation. Angle valves involve a 90-degree turn which increases flow resistance but are more compact and better suited for roughing or venting.

Q: Why are bellows-sealed actuators preferred for UHV over dynamic O-ring seals?

Bellows-sealed actuators use a metallic flexure as a permanent barrier, eliminating dynamic leak paths, particle generation, and atmospheric permeation found in sliding O-ring seals. This is vital for maintaining Extremely High Vacuum (XHV) levels and preventing hydrocarbon contamination.

Q: Are AIMRSE valves compatible with high-temperature bakeout processes?

Yes. Elastomer-sealed valves support bakeout up to 150°C. For systems requiring higher temperatures, AIMRSE all-metal valves with OFHC copper gaskets are rated for sustained bakeout up to 450°C to eliminate adsorbed water vapor.

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Cat	Products Name	Key Features
VPC-VV-071	Vacuum Valve-Stainless Steel-Fluororubber,Bellows-2e5-6.7e-7Pa--30-+150°C	Stainless steel; Fluororubber bellows; 2e5-6.7e-7Pa
VPC-VV-072	Vacuum Valve-Carbon/Stainless Steel-Fluororubber-Any Orientation	Carbon/stainless steel; Fluororubber; Any orientation
VPC-VV-073	Vacuum Valve-Stainless Steel-Fluororubber-105-6.7e-5Pa	Stainless steel; Fluororubber; 105-6.7e-5Pa
VPC-VV-074	Vacuum Valve--30-+150°C-Any Orientation	-30-+150°C; Any orientation
VPC-VV-075	Vacuum Valve-105-1.3e-7Pa--30-+150°C-Any Orientation	105-1.3e-7Pa; -30-+150°C; Any orientation
VPC-VV-076	Vacuum Valve-Stainless Steel-Fluororubber,Bellows-105-1.3e-7Pa	Stainless steel; Fluororubber bellows; 105-1.3e-7Pa
VPC-VV-077	Vacuum Valve-Stainless Steel-Fluororubber,Bellows-105-1.3e-7Pa--30-+150°C	Stainless steel; Fluororubber bellows; 105-1.3e-7Pa
VPC-VV-078	Vacuum Valve-Stainless Steel-Fluororubber,Bellows-105-1.3e-7Pa-Any Orientation	Stainless steel; Fluororubber bellows; Any orientation

High-Performance Vacuum Isolation & Control Valves

The operational stability of a vacuum system is fundamentally dependent on the hermeticity and reliability of its flow control components. AIMRSE specializes in precision-engineered vacuum valves designed to provide absolute gas-phase isolation across pressure regimes spanning from atmosphere to Extremely High Vacuum (XHV). Our valves utilize advanced bellows-sealed architectures to eliminate dynamic O-ring dependencies, ensuring zero atmospheric back-diffusion and extended cycle life in the most demanding process environments.

Engineered for seamless integration into semiconductor tools, particle accelerators, and UHV research platforms, our valve portfolio focuses on the optimization of molecular flow conductance and the mitigation of particulate generation. By utilizing high-purity 316LN stainless steel and specialized elastomeric or metal-to-metal sealing technologies, AIMRSE valves provide the critical barriers necessary to maintain process purity, even during high-temperature bakeout cycles or exposure to corrosive precursor gases.

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Discuss your specific conductance requirements, actuation speeds, and material compatibility with our senior vacuum specialists.

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Advanced Sealing Mechanics & Conductance Engineering

Bellows-Sealed Hermetic Barriers

To achieve leak rates below $10^{-10}$ mbar·l/s, AIMRSE isolation valves utilize AM350 or 316L stainless steel nested bellows. This architecture provides a robust, flexible hermetic barrier between the actuator mechanics and the vacuum volume, eliminating the risk of lubricant migration or atmospheric permeation associated with traditional shaft seals. The bellows are designed for high-cycle fatigue resistance, ensuring consistent performance over millions of operations.

Conductance-Limited Flow Optimization

In the molecular flow regime, the effective pumping speed of a system is severely impacted by the geometry of its valves. AIMRSE gate and angle valves are engineered with maximized orifice diameters and optimized internal contours to minimize flow impedance. By using finite element analysis to streamline the gas path, we ensure that the system achieves the highest possible effective conductance, critical for rapid pump-down and stable process pressure control.

All-Metal UHV Sealing Principles

For XHV applications where elastomer outgassing is unacceptable, our all-metal leak and isolation valves utilize the elastic-plastic deformation of OFHC (Oxygen-Free High-Conductivity) copper against a hardened stainless steel knife-edge. This ensures a metal-to-metal seal that remains hermetic at pressures down to $10^{-12}$ mbar and survives repeated high-temperature bakeout cycles up to $450^{\circ}$C without compromising the vacuum integrity.

The Advantages of AIMRSE

Engineered for extreme hermeticity and superior industrial duty cycles.

UHV Integrity

Verified helium leak rates of $< 1 \times 10^{-10}$ mbar·l/s, ensuring absolute vacuum stability for UHV/XHV environments.

High Cycle Reliability

Bellows-sealed actuators designed for over 1 million trouble-free operations in automated industrial fab lines.

Low Particle Emission

Optimized internal mechanisms and Class 100 cleanroom cleaning protocols minimize particulate contamination during actuation.

Bakeout Capability

Metal-sealed models support sustained thermal processing up to $450^{\circ}$C, essential for degassing UHV chambers.

Standards & Metallurgical Compliance

The mechanical and metrological integrity of AIMRSE vacuum valves is strictly governed by authoritative global industrial standards. All flange interfaces comply with ISO 1609 (Vacuum technology — Flange dimensions) and ISO 2861. Every valve undergoes 100% helium mass spectrometer leak testing in accordance with EN 13185. Our manufacturing workflows are fully audited under ISO 9001:2015, with material traceability verified against NIST-linked benchmarks. Furthermore, our semiconductor-grade valves meet SEMI S2 guidelines, ensuring unimpeachable performance and safety for critical cleanroom and hazardous gas processing applications.

Technical FAQ

What is the difference between a gate valve and an angle valve in terms of conductance?

Gate valves provide a straight-through, unobstructed path with a diameter matching the flange orifice, offering the highest possible conductance. They are preferred for main pumping line isolation. Angle valves force the gas to undergo a 90-degree turn, which introduces more flow resistance. However, angle valves are more compact and typically offer better throttling characteristics for roughing or venting lines.

Why are bellows-sealed actuators preferred for UHV over dynamic O-ring seals?

Dynamic O-ring seals rely on sliding contact, which can wear over time, generate particles, and allow atmospheric gas to permeate through the elastomer. Bellows-sealed actuators use a metallic flexure as a permanent barrier. This completely eliminates dynamic leak paths and the risk of hydrocarbon contamination from seal lubricants, which is vital for maintaining Extremely High Vacuum (XHV) levels.

Are AIMRSE valves compatible with high-temperature bakeout processes?

Yes. Our elastomer-sealed (Viton) valves typically support bakeout up to $150^{\circ}$C in the open position. For true UHV/XHV systems requiring higher temperatures to eliminate water vapor, AIMRSE offers all-metal valves with OFHC copper gaskets that are rated for sustained bakeout up to $450^{\circ}$C.

Related Products

Note: Our vacuum equipment is for research and industrial testing only. Industrial-grade components are fully rated for field deployment.

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