Aspirator Mixer Identification
— The 4-#### number cast into the mixers are casting identification numbers, which can be machined internally to different sizes. So these numbers alone do not always identify the mixer size, see table below.
— The product number "3065" or "65" and the North American pipe code is cast into the side close to the air pressure tap.
— "S" type 3065 mixers are machined with larger interior orifices to provide higher premix capacities. They should have an "S" stamped after the 3065 or 65 cast numbers, but the most reliable way to determine if a 3065 is an "S" type is to measure the air throat diameter.
3065-5
3065-3-S
3065-Mixer displacement rods : Mixer displacement rods are used to fine tune the capacity of the 3065 mixers.
— Rods have a number stamped on the mounting nut or flange which represents the rod diameter in 32 nd 's of an inch.
— A "0" stamped on the rod mounting means there is no displacement rod attached.
Table 10.
Mixer
Body Casting
Gas Connection Casting Number
Mixing Chamber Gas Cartridge*/Valve
Body Casting
Inlet Orifice
Designation
Number 4-1452
Casting Number
Casting Number
Throat Diameter
Diameter
3065-0 3065-1 3065-2 3065-3
4-910 4-759 4-788 4-790 4-790 4-792 4-792 4-794 4-794 4-797 4-797 4-1144 4-1144 4-1138 4-1138
— — — — — — — — — — —
— — — — — — —
0.375 0.438 0.594 0.719 0.844 0.906 1.000 1.063 1.250 1.281 1.594 1.750 2.188
5⁄8 "
4-762 4-787 4-789 4-789 4-791 4-791 4-793 4-793 4-796 4-796 4-1147 4-1147 4-1137 4-1137 None
13⁄16 "
1"
1 ¼ "
3065-3-S
1 47⁄64 "
3065-4
1 5⁄8 " 1 5⁄8 "
3065-4-S
3065-5
4-931 4-931
1 15⁄16 " 2 5⁄8 " 2 13⁄32 " 3.23"
3065-5-S
3065-6
4-1459 4-1459 4-1364 4-1364 4-1468 4-1468 2-3805
3065-6-S
3065-7
4-1148 4-1148 4-1145 4-1145
3 5⁄32 " (plate) 3 ¼ " (plate) 4 ¾ " (plate) No Plate No Plate
3065-7-S
3065-8
2.75
3065-8-S
3.313 3.688
3065-9
None
—
Bulletin 3065 page 19
Note: *Some gas cartridge castings do not have visible identifying numbers.
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