Weber's DGV series carburetors are a 2-barrel, progressive downdraft carburetor with versatility and wide adaptability. They are cost efficient with a low initial cost, increased fuel economy and improved performance. Weber gave them excellent drivability while being easy to not only install, but to maintain as well. The DGV series includes features like a diaphragm type accelerator pump circuits and a power valve circuit that facilitates low vacuum running conditions perfect for lengthy high output situations. If you are after a better throttle response then the synchronous-opening model 38 DGAS can be used as a high performance alternative for most DGV applications and only require an adapter and possibly slight modification for clearance. Additionally, the DGV series also includes ICU (integral idle cut-off unit) carburetors. These carburetors solve the diesel or "run-on" issues of those engines that continue to run after they are turned off by shutting off the fuel supply to the idle circuit when the engine is switched off. The DGEV, DGAV, DGES and DGAS are all part of the DGV family. Two of the DGAV series casting numbers for these are 22680051B and 22680033B. Casting number 18930020 is a DGES. Some of the DGEV casting numbers are 22680033B, 18930032, 22680172, 22680160 and 18930020. I think DF is the prefix for all the DF family DFV and the rest The DFV Series offers the same increased performance, economy, drivability and excellent values does the DGV Series. The basic design of the DFV carbs is that of the DGV Series. but as a mirror image, with the primary and secondary barrel position reversed in the body While the throttle lever in the DFV rotates in a clockwise motion it rotates counter clockwise in the DGV. The DFV also features a power valve circuit to facilitate low vacuum running conditions-perfect for long duration, high output situations.
