It is therefore, an object of the present invention to provide the existing state-of-the-art with an improved flexible diaphragm valve of the type discussed above.

Still another object according to this invention resides in the fact that a reliable, simple and inexpensive arrangement for disposition of the valve plate on the diaphragm is made available and thereby more improved reliability and performance of the diaphragm valve is achieved.Instrument Manifolds

It is another object of the present invention to provide the existing state-of-the-art with a diaphragm valve of the type discussed above which fulfills the requirements of this type of valve and which ensures that the pressure of the pressurized liquid flowing through the system is controlled as accurately as possible in spite of the fact that a flexible membrane is employed. Filter

A still further distinct advantage of this invention is the fact that the maximum stroke of the flexible diaphragm can be limited by a stop member located in a chamber in the housing which stop member prevents stretching of the diaphragm beyond a predetermined degree and any inordinate pump stroke by the diaphragm at the beginning of operation is thereby avoided.

Yet another object of this invention is the inclusion in the device of a stationary thrust ring concentrically disposed in said housing with respect to the valve seat and defining a knife-shaped edge which lies in a common plane with the valve seat and which operatively cooperates with the valve plate, with the knife edge also having a plurality of radially extending means defining openings therein, the arrangement being such that pendulum-like movements of the valve plate relative to the valve seat are thereby prevented.

FILTER SERIESOther objects, features and advantages of the present invention will be made apparent from the following detailed description of a preferred embodiment thereof provided with reference to the accompanying drawing.

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