These durable pumps easily and quickly attain and hold vacuum of 635Torr (25" Hg)

Smaller size has a pumping rate of 15mL/stroke and 3psi positive pressure at the exhaust port. Larger sizes have 36mL/stroke and 7psi positive pressure at the exhaust port. Units have a removable safety cover on exhaust port. They feature an adjustable vacuum release with trigger which works without disconnecting pump from the line. Lightweight and self-lubricating.