Drive for Switching a Double Seat Valve

Abstract

#CMT# # / CMT# The drive (70) has drive pistons (74,78) that are provided in valve housing (2). The pressure medium chambers (84,88) are provided in valve housing for creation of partial open positions. The drive piston (74) is moved from closed position to partially open position against open position, so that valve (1) is operated using one spool (3) and one seat plate (4) at one configuration of drive. The drive piston (78) is moved from closed position to partially open position toward open position, so that valve is operated using seat plate at other configuration of drive. #CMT#USE : # / CMT# Drive for shifting double seat valve. #CMT#ADVANTAGE : # / CMT# The double seat valve can be shifted reliably and safely. Installation space of the drive is reduced. #CMT#DESCRIPTION OF DRAWINGS : # / CMT# The drawing shows a sectional view of the double seat valve with drive. 1 : Valve 2 : Valve housing 3 : Spool 4 : Seat plate 70 : Drive 74,78 : Drive pistons 84,88 : Pressure medium chambers.

Description

technical field [0001] The invention relates to a drive for switching a double-seat valve, in particular a double-seat valve with a cleanable seat, which is provided with two closing parts which can move independently of each other, the closing parts between them Surrounds a leakage cavity between them, which is connected to the environment of the double-seat valve, wherein the first closing part rests on the second closing part after a partial stroke, and during its further opening movement the The second closing part is likewise shifted into the open position, the drive device comprising actuating rods for the closing part which are arranged concentrically nested in one another, which lead outwards from the valve body into the drive device and are passed through the The adjusting lever and the closing elements are additional to the open position and independently of each other, can be selectively brought respectively into a partly open position, the open position being produ...

AI Technical Summary

Problems solved by technology

[0012] The large structural dimensions require corresponding structural space in process plants with many valves, which is in many cases not available or which leads to corresponding costs

Efforts to make the components lantern, drive and control unit compact and space-saving at least in their necessary direction of alignment with one another, ie in the direction of axial extension of the drive, have been insufficient.

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