Selection of pressure gauges
Thread Content
A pressure gauge needs to be installed at the outlet of the oil wastewater pump. The operating pressure at the pump outlet is 0.4 Mpa. I’m not sure how to choose the right pressure gauge: should it have threads, be made of 304 material, be a spring-type gauge, with a range of 0–0.6 MPa and an accuracy class of 1.6?
For the pump outlet, choosing 0.6 MPa is too low. Consider: range selection, accuracy, interface type and size, and dial size.
This post was last edited by ylb913 on 2015-8-6 07:45. The indication range of the pressure gauge at the vibrating part should be between 1/3 and 1/2, with 1.0 MPa being a suitable value. The dial diameter is usually 100, with an accuracy level of 1.6 in most cases. Stainless steel spring pressure gauge, model YB-100.
Agree with the person above; 0.6 is too low – overpressure can occur easily when the pump starts, and pipe blockages can also lead to overpressure
The first point is that the measurement method of the pressure gauge can be selected based on the properties of the medium being measured; for example, if the oil in question is very dirty or toxic, a diaphragm pressure gauge can be used. The second point is to determine, based on the vibration level of the equipment on site, whether it is necessary to choose a shock-resistant version. The third point is to select the interface size, range, and accuracy grade. It’s just my personal opinion; please don’t criticize if you disagree.
The pressure at the pump outlet is pulsating; for a pressure of 0.4 MPa, using a pressure gauge with a range of 0.6 MPa is insufficient. It is recommended to use a pressure gauge with a range of 1.0 MPa, along with a stainless steel shock-resistant pressure gauge featuring M20*1.5 threaded connections and a Y-100 connection type.
It is recommended to use a stainless-steel diaphragm pressure gauge with a pressure rating of 1.0 MPa, grade 1.6, threaded connection M20×1.5, and Y-100. Diaphragm pressure gauges are suitable for measuring media with high viscosity and solid suspended particles, such as sewage.
It is recommended to use a pressure range of 0–1.0 MPa, grade 1.6; threaded connections of M20×1.5 or 1/2” NPT; a 316SS diaphragm pressure gauge suitable for dirty oil as the medium; shock-resistant design at the pump outlet; with a dial diameter of 150 or 100.
We welcome more professional exchanges. Is there a significant difference in cost compared to mechanical pressure gauges?