Fill oil to Xray tube
November 01, 2019 11:27
Hi guysI want to fill oil into the Xray tube, and I have a oil bottle from GE(KF-96-50CS, part number: PA9110WA), I usually this oil to fill into wells of tube. Can I use this oil to fill into a GE Xray tube?Thank you for the supports.
to rate and post a comment
re: Fill oil to Xray tube
November 04, 2019 10:06
an x-ray tube is not supposed to be open to atmosphere, due to moisture & other contaminants. Normally, you would vacuum down the tube, then (at a certain vacuum level that I can't remember) allow the vacuum to draw in the oil. it takes a special rig to do it properly. As far as the oil goes, we would use Shell Diala AX for both inside the x-ray tube housing, and in the federal standard HV cable sockets (at the HV transformer end only).
November 04, 2019 10:07
The x-ray tube needs to be vacuum sealed to remove all air. Air bubbles can cause arcing in the tube.
Two things-- why to fill tube, does it have a bubble?
If so, likely the original volume of oil is unchanged.
Filling the missing volume will reduce the temperature compensating bladder to eventually flatten and increase the internal pressure.
if planning to refill an empty Tube, do you have enough oil?
The P9110WA will function well.
Remember, one needs bladder volume proper to compensate for temperature change in the Tube usage.
Juan de la Cruz Martinez
Yes you can, but remember the X-ray tube in on a vacuum, any bubbles and it will Arch
November 04, 2019 10:08
Yes, you can use this oil to fill or refill any xray tube.
November 04, 2019 10:18
Yes, you can use it
November 04, 2019 10:19
Yes, as long as it's dielectric oil it will work.
re: re: Fill oil to Xray tube
November 05, 2019 10:27
Dont worry it will work during long time. (3-5 year)
If you have a P9110WA bottle, you do not have enough to fill an XRay Tube. If the Tube operates at 140KV, Oil should be vacuum processed for the Tube to operate properly.
As one of the two inventors of the XRay Tube Oil processing systems along with Les Baranowski, this process is used throughout the industry, though hapazard efforts can be applied with jerry rigged equipment.
A while back, I shipped three JEDI Tanks to a client in the Philippines, who claimed fully tested Tanks were shipped without oil and sent them back. We shipped three more, same response. By this time the original three claimed to have no oil had returned, and clearly, the technician had opened the Fill Port, and immediately the Bellows (bladder ) collapsed implying no visible oil.
Finally, we shipped a third group of three and cautioned the client we would require the technician not open the port or no more would be sent.
Worked fine, since all our Tubes, Tanks, Hemits, Generators and Inverters are fully tested.
The purpose of this writing is to imply you cannot be adding oil to a Tube with a Bubble, because that would limit the temperature to which the Tube can be functional. Also, opening the Fill Port on an XRay Tube will generally collapse the bellows (bladder) and create an even larger amount of oil to add, thereby lowering the temperature at which the Thermal or Pressure switch in series will halt the use of the tube. A third problem is to find the bubble, as many XRay Tubes have Heat Exchangers and Pumps and portions of the bubble may reside anywhere. Chasing bubbles is an exhaustive process.
If you are somehow able to expand the bellows to force the bubble to appear at a Port and can then control the pressure enough to not squirt large quantities of Oil onto the floor, remember that the bubble comes from oversaturated oil content and simply releasing the bubble that way will return the Tube to original condition, with the exception, that the oil is already saturated and will quickly develop another bubble. I know this discussion seems rather infantile, but XRay Tubes are rather ingenious devices which take poorly to having their butt kicked.
The bubble gases can be several, but the main ones are acetylene and water. Water, a polar molecule, is normally at saturation at about 60PPM and the stress caused in HV Circuitry can crack hydrocarbons readily, producing long chain (grease), short Chain (aromatics) and every kind of hydrocarbon in between and gases with widely varying saturation levels. The HV Stresses are widely variant among manufacturers, with resultant gas production variant a swell.
Best to send to the best site in the world for Tube Repair, which returns the Insert and oil to new condition, even for Failed Tubes.
One last comment---- read what I have written, we have repaired thousands of failed tubes, hundreds of all oil filled HV Tanks, etc. and make our own oil processors and even have mobile stations in some countries. A bubble seems innocuous, but there is a reason for them.
One more thing, the positive answers provided indicating he can use the oil he has are, for the above reasons, essentially incorrect.
November 06, 2019 04:13
Yes you can. Also you can use oil shell dial z4. For xray tube don't worry about bubbles. Only for CT tube necessary to remove air
November 06, 2019 06:51
I realize CT is a special issue, but any time a bubble appears near a source of High Voltage, ionization is likely to occur. Ionization in its shortest form often called a spit, in its heavier form an Arc.
Have you considered a Cath Lab, where the attitude of the Tube is unpredictable, or if a spit occurs during a heart procedure the effect on the patient..... What of a surgical C-Arm? In a RAD Tube, a Mobile Xray, and several others.
I think you should reevaluate "only CT", Gabriel.
re: re: re: Fill oil to Xray tube
November 07, 2019 09:09
The construction of xray tube is very simple. There is no difficult parts where can be air. I have 8 years of experience for replacing xray and ct tube.
re: re: re: re: Fill oil to Xray tube
November 07, 2019 01:18
Wish you luck, when an arc occurs when a heart cath is being performed. I yield to your obviously superior analytical analysis of XRay Tube performance.
At RSNA 2019, Dunlee is announcing a new product development project to design CT replacement tubes for the next generation of GE CT scanners. The project promises to create an even broader portfolio of Dunlee CT replacement tubes. Read more>>>