airline check valves

[pgrzes]

Just wondering if anyone uses check valves on airlines to bay functions??? All my foamers and my hp manifold dont have a check valve on any of the airlines. occasionally with several things running at same time I will get air and some fluid coming out of the air regulator. I am thinking a check valve on each line would eliminate that??

 

[Stuart]

I have check valves on each liquid and air low pressure lines in my trough above the bay. On each 1/4" tubing I have an inline pushloc check valve approx. 10 inches from the manifold, Then I have a high pressure check valve on the manifold separating the LP from the HP.
If the main HP check valve goes bad, the high pressure does not get to ER equipment and I don't get random holes blowing open in the tubing somewhere in the trough- the hole is contained within the 10 inches between the pushloc check valve and the manifold.
Hope this makes sense- I think I confused myself just thinking about it. Hope it helps.

 

[MEP001]

I don't put check valves on the individual lines because if the HP check valve fails the water has some place to go besides bursting the lines.

If you keep the air pressure close to the liquid pressure, you won't have liquid backing up into the air lines.

 

[mjwalsh]

I have check valves on each liquid and air low pressure lines in my trough above the bay. On each 1/4" tubing I have an inline pushloc check valve approx. 10 inches from the manifold, Then I have a high pressure check valve on the manifold separating the LP from the HP.
If the main HP check valve goes bad, the high pressure does not get to ER equipment and I don't get random holes blowing open in the tubing somewhere in the trough- the hole is contained within the 10 inches between the pushloc check valve and the manifold.
Hope this makes sense- I think I confused myself just thinking about it. Hope it helps.

Stuart,

I just learned something new by your description that makes perfect sense to me ... in terms of making downtime less likely by creating a bit of redundancy with easier to replace items than hunting the leak somewhere in the trough or the ER. Now if we make time to just go through the process to adopt your suggestion. Those LP pushloc plastic check valves that you suggest are extremely easy to install & also are very economical to buy.

Mike Walsh www.kingkoin.com

 

[MEP001]

Stuart,

I just learned something new by your description that makes perfect sense to me ... in terms of making downtime less likely by creating a bit of redundancy with an easier to replace items than hunting the leak somewhere in the trough or the ER. Now if we make time to just go through the process to adopt your suggestion. Those LP pushloc plastic check valves that you suggest are extremely easy to install & also are very economical to buy.

Mike Walsh www.kingkoin.com

Not having a check valve on the line creates a problem where none needs to exist should a high-pressure check valve fail. If the air regulators are the type that bleed off excess pressure, it will leak water if the valve at the boom fails and cause no damage. You'll also get a very clear telltale of the problem in the equipment room instead of water (or presoak/tire cleaner) raining on the customer's head.

 

[mjwalsh]

If the air regulators are the type that bleed off excess pressure, it will leak water if the valve at the boom fails and cause no damage. You'll also get a very clear telltale of the problem in the equipment room instead of water (or presoak/tire cleaner) raining on the customer's head.

If one air regulator like you describe for the tire motor does like you say ... then that approach makes sense. If it requires 2 air regulators ... then hopefully there is a lower cost pop off valve available with an outlet that can be teed in each low pressure plastic tubing. Wherever the pop off valve would be located .. an outlet would be helpful so it can be directed away from "raining on anybody's head"

mike walsh www.kingkoin.com

 

[MEP001]

There are usually two separate regulators already in place for the tire cleaner air and presoak air to the bays, even if they have a common air line.

Again, why add hardware (such as a pop-off) if it isn't necessary?

 

[mjwalsh]

There are usually two separate regulators already in place for the tire cleaner air and presoak air to the bays, even if they have a common air line.

Again, why add hardware (such as a pop-off) if it isn't necessary?

Apparently, our air regulators that came with our equipment from now defunct Speciality Equipment are not the type that will relief off quick enough to prevent an occasional burst low pressure plastic tube ... potentially anywhere between the ER & the bay manifold.

 

[MEP001]

They're reasonably priced even at Grainger:

http://www.grainger.com/product/SPEEDAIRE-Regulator-4ZM08