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Hi all, does any one know what purpose the spring loaded part that is central in the picture does. The part is a PA #VS 220. I am assuming it is an unloader, does anyone have any ideas on what it is or does? I noticed some leakage from both my boilers today as soon as I put it...

This is a job I got last week at a local mall. When the masons laid the granite they used a chemical resistant grout, but failed to wash it off until the next day. The latex had set and any type of acid wouldn't affect it with any dramatic results. So I enlisted the company that I do some work...

Hi all, I have an opportunity to bid on the following walls for graffiti removal. I tried using a Xylene /Toluene mix that I scored from Akzo Nobel's paint factory but this did little. I will try some "Goof Off" later tonight, although the ingredient are pretty much the same as the...

Does anyone have any tips on removing an Interpump RS151 gear reducer from a Honda keyway??? I've somehow managed to fracture the housing on the gear box and I have to remove it to either replace it or get it rewelded? I undid all the bolts today and used the gentle persuader( Rubber hammer) to...

Has anyone tried their chems, or one of their conglomerate companies "Blue Coral" chemicals. I called one of their reps today to find a detergent that doesn't cause rust on the underbody when the paint has been sanblasted by the road. I thought of giving it a spray with phosphoric acid after...

I've been upstreaming soap for the last two months now, and I have to say it definitely has given me the best results so far. I have also found that I don't use any more soap than I was when downstreaming, I have found that one of the more important ingredients is the solvent for removing the...

Does anyone know how to remove an unsent file from the outbox in outlook. I've tried the conventional way of deleting it , but it won't let me it just freezes up and says the program is not responding. I think may be the email is to large (135 MB) so maybe this was the cause? The version is for...

This access road is at a Steel Tube Mill. The job took 3 hours to treat. 1 hour each to set up and pack up. The total area was 5000+ square foot. Chemical phosphoric acid + acid foaming surfactant.

Larry, Dan S I've been dabbling in the two step for a few months and I am now trying to get it to my liking. Originally, I used my 4GPM machine with a hot box to do the trick . I applied the HF @ 3% with a shurflo the downstreamed the soap at a reasonable pressure. The...

Thanks Mike, I just did a quick search and saw Gortex has nylon in it. I'll tell you a funny story. When I was looking for a good set of water proofs for brickcleaning I went to a commercial marine store as I was sick of ripping the cheap throw away yellow pvc wet...

Do any of you guys over there know of a good solution to keep my feet dry? If it gets hot over here, I get drenched in sweat, and it all runs down to my rubber boots/Wellingtons/galoshers? I don't know what you guys call them over there? But I have to wring my socks out 3-4 times a day to stop...

Just a quick question. As far a neutralizing the HF acid at 2% that I have been applying with a shurflo, I have been doing this with a soap base with 4% sodium hydroxide downstreamed with hot water. But I have found that the caustic is causing rust on any nickel deficient iron on the chassis...

I beefed up my caustic percentage in the downstraem soap mix to 4% in the two step process and have since found on one older truck that rust was starting to form in areas that posibly could do with repainting. Seeing this I am now going to add 10-20% phosphoric acid to my HF mix to try to...

What are they and what do they do?

I have noticed the last couple of times I've 2 stepped HF on bull bars and fuel tanks they are streaking, admittedly they have been neglected for a number of years. Is there a way of counter acting this? They are white Alum not polished. Although, I never have any issues with the stainless...

Dave Olsen: Hi Dave, youv'e mentioned this chem a couple of times in the threads any I'm sorry for not replying sooner to your valuable information. I've always been exposed to NaOH, but never sodium metasilicate I didn't think we could get it over here easily(my usual chem suppliers...

Larry, could you please elaborate on this. My concerns with flashing is that I would have to wear full chem suit and respirator while doing this. If you are downstreaming then at what Concentration is your acid 20% or 40 % to get it at 1-2% at the dual lance and how effective is...

Does anyone know the best way of removing tyre marks from a concrete surface, I've been asked to bid on 500M square of floors with the scpoe of 20,000 if it turns out well. It has "mild" forklift and scissor lift marks. I was thinking of two stepping it with hot water and a surface cleaner...

I learn something amazing every day with this industry. How often does everyone change their nozzles? I put a new 25 09 nozzle on today to brickclean a house I couldn't believe how crisply it cut away at the mortar tags, I had never taken the nozzle wear into account before and was oblivious...

Is there a particular chemical that I need to be adding to my detergent to remove road film . I 2 stepped yesterday and had to brush after applying detergent ( I also added some NaOH to the detergent to beef it up). On this job I used 20% H3PO4 thru a shurflow as client didn't want HF on site I...