LDS Vacuum 212-000 Blank Flange – LOT OF 2

The LDS Vacuum 212-000 is a high-quality single-faced Conflat (CF) blank flange designed for ultra-high vacuum (UHV) and high vacuum systems. Made from 304 stainless steel, this blank flange provides a reliable sealing surface for DN25CF / 2.12″OD systems and is ideal for research labs, vacuum systems in physics/engineering, process chambers, and instrumentation setups.

Key Features & Specifications:

• Size / Interface: 2.12″ outer diameter (OD) CF flange – equivalent to CF212, DN25CF, NW25CF, 2-1/8″ CF.

• Material: 304 stainless steel – durable, vacuum-compatible material suitable for UHV applications

• Design: Blank flange (no ports) – used to seal off unused ports or end a branch of vacuum system.

• Mounting holes: 4 clearance (thru) holes; bolt hole diameter approximately 0.265″.

• Non-rotatable design: The flange is non-rotatable (i.e., the flange face remains fixed when bolting).

• Vacuum rating: Suitable for high vacuum and UHV use (the specification sheet indicates UHV compatibility down to ~1×10⁻¹³ Torr for similar LDS blanks).

• Temperature rating: Rated to approximately 450 °C (per LDS blank flange page) in typical high vacuum service.

• Torque spec for bolting: For 2.12″ OD CF flanges, the max recommended torque is ~16 ft-lb to ensure vacuum tight seal without bolt damage.

Applications:

• Sealing off ports in vacuum chambers during experiments

• Closing unused CF flange ports in ultra-high vacuum systems

• Use in mass spectrometers, vacuum deposition systems, surface science instrumentation, research apparatus

• Ideal for engineers or scientists retrofitting or maintaining vacuum systems using standard CF components