LIQUIDITY EXPENDITURE, EXPENDITURE AND EXPENDITURE SYSTEM

摘要

The dispenser has a feed unit with feed or dosing cylinder and piston, to feed fluid from a container to an outlet. A discharge duct (2) and a return duct (3) are formed in a hollow discharge needle (1). A connection device (5) contains an outlet (4) of the discharge needle, and this is connected to the return duct. The needle is connected to a valve block (35), which contains a fluid supply channel (26), connected to the discharge duct, and a fluid return channel (36), connected to the return duct. The discharge needle is impressed into the valve block. The feed/dosing cylinder (37) is formed integrally with the valve block, and is pref. a glass cylinder, and esp. extrusion-coated with plastic. It has a cylinder insert of glass, ceramics, thermoplastic or duroplastic material. The discharge needle is part of a modular system.