Modular vacuum and low pressure valve assembly

A valve assembly comprising:

• a valve housing defining a cylindrical housing interior, the housing including a first tee part and a second tee part, each of the first tee part and the second tee part having a first open end, a second open end axially opposed to the first open end, and a side port located between the first open end and the second open end opening, the first tee part interconnected end to end to the second tee part to form part of the valve housing such that the second open end of the first tee part is coupled to the first open end of the second tee part,
• port adjustment means interconnecting the first tee part to the second tee part for adjusting the radial orientation of the side port of the second tee part with respect to the radial orientation of the side port of the first tee part
• a valve seat disposed within the housing interior,
• a disc disposed within the housing interior and axially shiftable within the housing interior between a first position where the disc sealingly abuts against the valve seat thereby preventing flow communication between the side port and the second open end of the first tee part and a second position where the disc is spaced from the valve seat thereby permitting flow communication between the side port and the second open end of the first tee part, and
• actuation means sealingly fitted to the first end of the first tee part and operatively connected to the disc for selectively reciprocating the disc within the housing interior between its first position and its second position.

A valve assembly comprising:

• a valve housing constructed of plumbing components and defines a cylindrical housing interior, the housing including a plurality of tee joints interconnected end to end with each other, each tee joint having a first open end, a second open end axially opposed to the first open end, and a side port located between the first open end and the second open end opening,
• a plurality of valve seats constructed of plumbing components disposed within the housing interior,
• valve seat adjustment means interconnecting at least one of the plurality of valve seats and valve housing between the first tee part and the second tee part for selectively positioning that valve seat within the housing interior,
• a plurality of discs disposed within the housing interior and shiftable axially within the housing interior for sealing engagement against at least one of the plurality of valve seats, and
• a piston cylinder mounted to the valve housing and operatively connected to the discs for moving the plurality of discs between a first position where at least one of the plurality of discs sealingly abuts against one of the plurality of valve seats thereby permitting flow communication between selected ones of the plurality of tee joints and second position where at least one of the plurality of discs sealingly abuts against another of the plurality of valve seats thereby permitting flow communication between other selected ones of the plurality of tee joints.