Differential Pressure Instruments
For Efficient working of your
instrument, please read all instructions carefully before attempting to install. CAUTION : Do not exceed maximum operating pressure given on the instrument label. Check fluid compatibility with wetted parts before use. For highly corrosive media, hardous location or area please contact manufacturer.
High and low pressures are
separated by a sensor assembly consisting of a magnet, pistons, Teflon seal and range spring. The difference in pressure causes the sensor
assembly to move in proportion to the change against a range spring.
A rotary magnet, located in a
separate body compartment and isolated from the acting pressures, is rotated by magnetic coupling as per the linear
movement of the sensor assembly A pointer attached to the rotary magnet indicated
differential pressure on the dial
SWITCH : Reed switches are located adjacent to the pressure chamber and are activated by the magnetic field of the sensor assembly.
Note : The instruments are calibrated to give ± 2 % full scale accuracy on ascending readings
For better performance he instrument
should be mounted horizontally by keeping the dial vertical Two mounting holes of size M6 or 1/4 " UNC are provided at bottom of the instrument body for mounting. Select instrument location where it is not subjected to heavy vibrations or shocks.
Depressurize the system and connect the high and low pressure lines of your system to the High & Low ports of the instrument respectively
It is recommended to use "O" rings with male connectors to avoid excessive tightening and to prevent leakage ( For
parallel threads) The instrument is now ready for operation. Apply "High " and low pressures simultaneously to
avoid damage to the internal parts . Model 200 DPG consists of a piston type mechanism to sense the pressure
difference. it can withstand maximum operating pressure difference. It can withstand maximum operating pressure up to 200 bar & temperature upto 80 C max. for all ranges.
It exceeds the rate maximum pressure, O rings used on male
connectors and the
Teflon seal inside the pressure chamber, will be damaged. If maximum operating pressure is within the allowable limit of 200 bar, but the
differential pressure exceeds instrument range, there will be no damage tot eh instrument.