Used, fully functional and in perfect condition check valves with some gravity action, the body has a sealing piston made of a large block of solid metal weighing about 15 kg, which with its weight seals the lower output pipe. The side one can be connected to a vacuum pump - a pump failure will never result in a sudden increase in air in the area being pumped out. Product weight with unit packaging: 1. We do not show the full stock quantity in our offers. If you have any other questions, please write to us.
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