vacuum waste system including particularly an aircraft vacuum waste system the following examples further illustrate the invention but should not be construed as in any way limiting its scope turning now to fig1 4 an embodiment of the flush valve of the present invention for controlling the evacuation of waste from a toilet in a vacuum waste system is labeled 10 in this embodiment of the invention flush valve 10 is designed as an integral component of a toilet supporting stand 40 fig1 for a vacuum toilet waste receptacle 47 the toilet supporting stand 40 has four interlocking sides 41 42 43 and 44 each of which has an open lattice structure as shown to minimize weight and maximize structural strength stand 40 is described in detail in a u s patent application entitled u201c vacuum waste system and method for using the same u201d ser no 61 102 812 filed oct 3 2008 the disclosure of this contemporaneously filed application relating to the structure of the stand is incorporated by reference sides 42 and 44 have a series of interlocking dovetails 28 fig1 2 and 10 on their edges for attachment to the dovetail receivers 48 fig1 of adjacent panels 41 and 43 of the stand in other embodiments sides 42 and 44 may have a series of dovetail receivers on their edges for attachment to dovetails of adjacent panels 41 and 43 of the stand stand side 44 shown in fig1 2 depicts the flush valve 10 of the invention as a component of side 44 of the stand the key components of the valve comprise a discharge disk 16 a driver gear 18 a follower gear 20 an actuator shaft 22 fig4 a follower shaft 24 and a.