These HVA brand manually operated series 11000 gate valves are made in the U.S.A and have an ISO-F DN 63 vacuum flange with M8 x 1.25 blind-tapped holes. They are rated for high vacuum (HV) and follow vacuum technology standards as described in DIN 28404 and ISO 1609. HVA Part Number: 11110-0253.

HVA manually operated vacuum gate valves feature a positive lock-over center mechanism with gate, bonnet, and bellows seals of Viton fluorelastomer (FKM) material. They are made with corrosion resistant 304 stainless-steel gates and valve bodies and have a typical life of 100,000 cycles (depending on the process) before needing service.

HVA valve bodies have one of the smallest interior surface areas in the vacuum valve industry. The body and all major internal components are vacuum furnace brazed at 1100°C at 1x10^-6 Torr using a proprietary process which ensures maximum joint integrity, minimizes outgassing during operation, eliminates the possibility of virtual leaks or entrapment areas, and minimizes body distortion found in conventionally welded valves.

HVA gate valves with ASA, ISO, or KF flanges are rated for high vacuum applications and are limited to ultimate pressures in the 10^-8 Torr range due to O-ring gas permeability. HVA gate valves have a helium leak rate of 1.5 x 10^-10 Torr l/sec and are bakeable to 150 °C (with the valve open or closed). Repair kits are available for all HVA gate valves we carry.

HVA gate valves are available in high vacuum and ultra-high vacuum varieties in the following sizes:

• Quick flanged sizes KF-16, KF-25, KF-40, and KF-50
• ISO LF flanged ISO-63, -100, -160, -200, -250, -320, -400, and -500 sizes
• ASA ANSI sizes 2, 4, and 6 inch sizes
• Conflat (CF) 1.33 , 2.75, 3.375, 4.5, 6, 8, 10, 12, 13.25, and 14 inch sizes

The installation manual and operating instructions are available in the downloads.