Device for adjustment of pressure sensors has needle valve between high pressure pump and aggregate

摘要

Aggregate (1) which can be loaded to a high pressure is connected to a high pressure pump (3) with piston (6) via a high pressure line (2). Needle valve (4) on the line can shut off the pump from the aggregate. There is no non return/check valve between the high pressure pump and the aggregate. The pump is connected to a tank (7) via a supply line (9) with a non return/check valve. The volume of the pump is sufficient for admission of the aggregate.