Models of PDW 10 series contains huge capacity screw pump and a detachable oil reservoir with isolating valve arranged in simple line circuit to remove the air.
Working Principle: The Dead Weight Pressure Gauge Tester is based on the pressure acting on the known area of a sealed piston that gives a force. The force of this piston is equalized by dead weights.
Main Components of the tester are:
Screw Pump: The screw pump applies pressure in the circuit of sufficient capacity. The screw pump makes sure that the spoked handle allows accurate pressure setting.
Free Piston Assembly: A high strength steel piston adjusted with accurate size and fine surface topography providing floating action.
Set of Weights: Every single weight is stamped with values of pressure and kept one over the other on the weight carrier fixed on the free piston. The different units of pressure measurement such as KN/m2, kPa, lbf.in2, kgf/cm2, can be adjusted according to the customer. The weights are provided in two material options: SS 304 and MS Phosphated black. A separate storage box is given for safe storage of weights.
Gauge Connector: ½” BSP (female) union for connecting the gauge to be tested. Various other sizes of gauge may be connected using adaptors.
Base Plate: A strong base plate which can take the load of the instrument having legs and levelling screws. The whole circuit is protected by a sheet metal cover.
Incremental Weights: For getting better least count, it is available with every model by paying an extra charge.
Calibration/ Traceability: Cross float method are used to calibrate against Master Weight Pressure Gauge Tester and Master Dial Pressure gauges. Our instruments possess test certificates traceable to National Standard which meets the requirements of QS 14000, ISO 9000 and other Inspection agencies.
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