Patent ID: 8141580

Claim:
A pressure reducer for fluid lines, comprising a sealing piston ( 70 , 110 ) as stop element, with an equalization piston ( 20 a , 190 ) for pressure equalization, having a single-part or multi-part connecting means ( 20 b , 90 , 200 ) by which the sealing piston ( 70 , 110 ) and the equalization piston ( 20 a , 190 ) are rigidly connected with one another, with a valve seat, in conjunction of which the sealing piston ( 70 , 110 ) defines a flow-through opening, against which the sealing piston ( 70 , 110 ) seals when the valve is closed, and which the connecting means ( 20 b , 90 , 200 ) penetrates, and with guide means ( 20 c , 210 ) which are directly or indirectly rigidly coupled with the connecting means and guide an arrangement composed of at least the equalization piston ( 20 a , 190 ), connecting means ( 20 b , 90 , 200 ) and sealing piston ( 70 , 110 ) in each operating position, wherein the guide means ( 20 c , 210 ) are arranged in the region of the valve seat between the sealing piston ( 70 , 110 ) and the equalization piston ( 20 a , 190 ); wherein the connecting means comprises a spindle ( 200 ), which is screwed into the equalization piston ( 190 ) and the sealing piston ( 70 , 110 ); wherein the guide means ( 210 ) are clamped between the sealing piston and the spindle ( 200 ).