Recent content by vahabsolgi

Ted About your previous question both face seal and diametral one are leaking because the pressure pass through the flange seal and then through the o-ring where the bubbles are visible there so no one of the seals are doing well! Why is that for!? Anyway great suggestion, I will create a...

Hi Hydtools I do not have any Idea. I can only check both seals together. the leakage can be from either of them!

Hi Desertfox the Flange seal ant the o-ring are not being pressed against each other. as it's shown in the attachment both flange seal and the o-ring b are being pressed to a solid steel part. https://files.engineering.com/getfile.aspx?folder=aeb43f57-a799-4ffb-a2d9-19841b1eea23&file=Seala.png

Hi All I was Checking the Sealing system practically and I realized that the problem is not from the electrode. The leakage come from the other part of the assembly. Please take a look at the attached drawing. I let the pressurized air flow into the tube and the checked every point of the system...

hydtools if there was any displacement it will be very small and there is no way to measure it but I think this is not our issue because the plates are very solid

Deasert fox the bolts are been fastened very tightly by hand. there is not enough room to change the o-ring arrangmnet to seal radially.

Dear desertfox It is not Clear that which one of the o-rings leaks during the test! it can be either of them. There is not a huge tolerance buildup here. It ranges from +0.05mm to -0.05mm in the o-ring compression. The bolts are being tightened in a Criss-Cross sequence and the plate material...

Dear hydtools The O-Ring durometer hardness is ShoreA=70. what will be the results if I use an o-ring with lower harness? can it help? I mean that is there any general rule about choosing the o-ring hardness?

Hi Desertfox The bolts arrangement has been enclosed. As you see, actually we have two electrodes which are being pushed toward each other by two solid plates. Meanwhile the bolts are passing trough the holes in one of the solid plates and end of them are been fastened to four nuts on the other...

Dear Ifw618, the information was helpful. Another question, does big compression (40% which is more than the standard) affect the sealing?

A plate in contact with the back side of the Electrode (the metal part) is applying the sealing force by tightening 4 bolts. The o-ring does not damage after the test. the gland dimensions: Inner Diameter: 2mm, Outer Diameter: 6mm, Depth: 0.9mm the o-ring dimensions: Inner Diameter: 3mm, Outer...

Hi Yes I have Checked the tolerances and there is nothing wrong there. the sealing force is applying directly to the back of metal part. I think the cause might be because there is a maximum pressure limit for any o-ring size which in my case the test pressure is higher than that. does every...

not actually, the seal leaks during the initial test and can not pass the test. after the test there is a liquid with maximum pressure 30 bar and maximum temperature 120 Degree centigrade in the right side of the drawing.

the fluid pressure is from the right side (according to the drawing). the o-ring fits to the outside diameter of the groove in its free state.

Hi Ted The groove is made by lathe and I have not measured its surface roughness but it is very smooth visually and the other contacting surface has been grinded and smoothly polished with the surface roughness Ra=0.5 By the way according to the O-ring makers handbook the compression is a little...