LoPro compact vacuum valves combine standard isolation valves and bypass valves. Formed bellows within the valves make them resistant to particle damage. The bypass valves create a small opening for the initial system pump down, which slows system evacuation. In the second stage, the main valve opens, which allows use of full pumping speed. The pneumatic bypass valve is available with an optional thumbscrew or micrometer head for additional flow adjustment. Circle 208
MKS Instruments Inc.