Wika pressure gauge features description

1. Why is the pressure difference in the 7 series differential pressure gauge with German wika spring tube not allowed to be less than 1/6 of the full scale value?
       For the Type 7 wika differential pressure gauge, the static pressure is the same as the full scale value at 270° output angle. If the static pressure is 1 MPa and the expected differential pressure is 0.1 MPa, the angle between the ends of the differential pressure gauge is approximately 27°. Therefore, to ensure the accuracy of the differential pressure gauge reading, the differential pressure should not be less than 1/6 of full scale (output angle is about 45°).
       2. What happens when a Type 7 differential pressure gauge with a synthetic rubber diaphragm is operated below the ambient temperature specified in the data sheet?
       In this case, the accuracy of the wika differential pressure gauge will be significantly reduced, because in low temperature environments, the diaphragm (whether FPM/FKM or NBR) will harden.
       3. What is the function of the single valve group of German wika?
       Wika's pressure balance valve is installed upstream, which can achieve pressure load balance on the positive pressure side and negative pressure side, avoiding single-sided over-pressure load during startup and operation, and zero check during instrument operation.
       4. What is the function of the wika three-valve group?
       The wika pressure balance valve is installed in the lower part of the differential pressure gauge to achieve pressure load balance on the positive pressure side and the negative pressure side, avoiding the one-sided overpressure load during the startup and operation of the instrument, and also performing zero check during the operation of the instrument. .
       5. What is the function of the wika four-valve or wika five-valve group?
       The wika pressure balancing valve (with integrated shut-off, exhaust and venting valves) not only allows the pressure gauge to ventilate through one or both sides, but also vents the supply line.
       6. Why is the wika differential pressure gauges 736.11 and 736.51 generally not suitable for corrosive media?

       When the wika differential pressure gauges 736.11 and 736.51 are used in the low pressure (negative pressure side) environment, the corrosive medium enters the inside of the display housing, corroding the dial (AI), the pointer (AI) and the display window, etc., so the wika differential pressure gauge 736.11 and 736.51 can only be used on the positive pressure side. However, the internal construction of the bellows pressure gauge is made of stainless steel and is suitable for corrosive media.