A steam injector is typically used to deliver cold water to a boiler against its own pressure using its own live or exhaust steam, replacing any mechanical pump. This was the purpose for which it was originally invented in 1858 by Henri Giffard. Dec 29, 2019 · Photo 3 shows the venturi in place in the tee junction. The two drawings below show the parts used to make the injector tee and, below, how the injector Tee combines pumped radiator circulation with the gravity feed hot water circulation. Soldering I pre-soldered the 15mm nozzle into the reducer. Oct 06, 2009 · Mazzei® makes a venturi injector system that threads into irrigation lines. They have no moving parts and require no electricity. They also cost a fraction of what an electronic injection pump ... 2" MAZZEI INJECTORS: Mazzei Injector Model 2081 TC3 ECTFE (Halar, very similar to Teflon) 2” Triclamp product connections 1 ½” Triclamp suction port Mazzei Injector Model 2081 SS Cast Stainless Steel 2" Triclamp product connections 1 ½” Triclamp suction port Options for Check Valves for 2" Mazzei (2081 TC3, 2018 SS/TC) 1 ½” PTFE (Teflon) insert check valve with stainless steel spring. Venturi injectors work by forcing water through a conical body. This action creates a pressure differential between the fluid inlet and outlet ports, which in turn creates a vacuum inside the injector body.