Description: Dead Weight Pressure Gauge Testers make use of the relationship between pressure acting on the known area of a vertically free floating piston producing a force balanced by known dead weight. These tester comprises of components like screw pump, free piston assembly, priming pump, set of weights, gauge connector, base plate and incremental weights. The screw pumps are used to produce pressure in the circuit of adequate capacity and are operated by a spoked handle which permits easy and accurate setting of pressure. The priming pump is a lever operated pump used for providing continuous oil delivery for filling up large gauges or even external piping. This pump is capable of developing 5% - 10% of the instrument range. Isolating valves are provided at both ends. It forms a unique closed circuit for effective air removal. The free piston assembly is made of special steel, hardened, tempered, ground and lapped to accurate size and very fine surface finish provides true floating action. Incremental weights provide smaller steps (better least count). Gauge connector of 1/2' BSP (female) union for connecting the gauge to be tested. Gauges with other connecting threads may be connected using adaptors provided.
