Patent ID: 8667989
Filing Date: 2014-03-11
Classification: F16K,Y10T

Abstract:
1. An aseptic or sanitary top hat diaphragm valve comprising: an elongated tubular valve body having a longitudinal axis, with a first end and a second end, and with flange rings at each end respectively; a first tube stub joined to one side of the tubular body and positioned on a valve axis that is transverse to said longitudinal axis, the first tube stub having a flange ring at an end thereof; a second tube stub joined to the tubular valve body on a side thereof opposite to the first tube stub and aligned along said valve axis, with a flange ring at an end thereof; an annular valve seat positioned within said first tube stub; an actuator attached onto the second tube stub and having a movable member that is capable of motion for a limited distance along said valve axis, said actuator having a flange ring mating against the flange ring of said second tube stub; a top hat sanitary diaphragm formed of a flexible elastomeric material disposed within said tubular body and being aligned along said valve axis, said top hat diaphragm including a lower annular portion retained between the annular flange rings of said second tube stub and said actuator, a cylindrical portion extending from said lower annular portion across said tubular valve body into said first tube stub, and an upper disk portion extending across the cylindrical portion and reaching said valve seat; and a plug member positioned within an interior of said top hat sanitary diaphragm, including a stem aligned along said valve axis with a lower end affixed onto the movable member of said actuator and a head portion disposed against the disk portion of said diaphragm such that by action of the actuator the disk portion is urged against said valve seat and is moved away from the valve seat.