Patent ID: 6902145

Claim:
A regulating slide valve comprising: a valve body having a valve opening; and a valve plate which has two side surfaces and which is displaceable along a displacement path between an initial position in which it releases the valve opening and an end position in which it completely covers the valve opening, said displacement path forming the regulating range of the valve; said valve plate having a contact ring on one side surface, which contact ring projects over the side surface of the valve plate and being mounted at or in the valve plate by a spring device, can be pressed in against the spring force of the spring device in the direction of the valve plate and contacts a contact surface of the valve body at least over a portion of its circumference in the end position of the valve plate, the contact ring is mounted in a groove of the valve plate and the groove has an area of greater width adjoining its base, which area is limited toward the surface of the valve plate by a step in both side walls of the groove, the latter begin adjoined by an area with a smaller width, and wherein the spring device has a plurality of helical springs which are spaced from one another in circumferential direction of the contact ring and which lie in the area of the groove having the larger width and whose diameter is greater than the width of the area of the groove having the smaller width.