ASTM D5275 Test Method for Fuel Injector Shear Stability Test (FISST) for Polymer Containing Fluids
5. Apparatus
5.1 The apparatus consists of two fluid reservoirs, a single-plunger diesel fuel injection pump with an electric motor drive, a pintle-type fuel injection nozzle installed in a nozzle holder, and instrumentation for automatic operation. Annex A1 contains a more complete description of the apparatus.
6. Reference Fluids
6.1 Diesel fuel is required for adjusting the nozzle valve assembly to the prescribed valve opening pressure.
6.2 Calibration fluid TL-11074 is used to verify that the shearing severity of the apparatus is within the prescribed limits.
