Email Required. Review Subject Required. Comments Required. Current Stock:. Quantity: Increase Quantity: Decrease Quantity:. This radiator air venting valve comes in three different thread sizes and can be used to manual air vent for radiators. Manual vent opening by fingers, no key is required. Working Pressure: 1,0MPa 10 bar. Related Products Customers Also Viewed. The valve is used to manual air vent for radiators.
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Nitric Acid. Phosphoric Acid. Salt Water. Soap Solutions. Sodium Hydroxide. Sodium Hypochlorite. Sulfuric Acid. Not Rated. Stainless Steel. Directional Control. For the photos shown here I used new parts at a workbench. But in the field may be installing this air bleeder into a pre-existing tapped opening, probably working in the dark, upside down, in a cold, tight crawl space, alone, maybe with the company of spiders and snakes - which is no place for an air bleeder that should be easy to access if it is to ever be used.
Watch out : For automatic or float type air bleed valves, the replacement procedure is essentially the same as shown here. Take off the old valve, seal the threads on the new bleeder valve, and screw it in place. But take care not to use the float body itself to screw the float bleeder valve into position - you may break it.
Watch out : for automatic and some manual air vents to work properly the vent or valve has to be installed in a location that will receive air in the water piping system, radiator, or other device, has to be installed in the proper position some vents like the Sparco air purger and the Taco Air Vent work properly only in the upright position , and the pressure in the heating or cooling water system must be higher than atmospheric pressure.
Otherwise when the vent or valve is opened air may enter the piping system rather than being purged from it. Watch out : when installing canister type air eliminators or air purge valves such as all of the float type valves, do not try to screw the valve body tightly into the receiving plumbing tapping by using a tool to torque or twist the valve body - you will most likely damage or ruin the valve. I have hot water heating and at the point farthest from my furnace is a Taco air vent.
About that vent, I'm pretty sure that's a conventional float-type air vent; if so it can't work properly for long in that position - since the floats depend on gravity and on air moving to the float top to work properly. There are, of course, other types of air bleeder vents that can be installed horizontally, including some shown earlier in this article. I'd bet that the valve stem cap on the float type air vent in your photo above left is screwed shut - or if it's not, and if it was not leaking, the orifice may have been clogged by mineral deposits and heating water debris.
Our photo at left shows a typical float type automatic air bleeder valve on a hydronic heating system. It is installed upright, and [click to enlarge] you can see the warning tag about leaving the cap loose if the float vent is to actually release air from the heating system. There are some hydronic heating system auto vents such as the Maid-O-Misty No.
You can get a clue about whether or not the air vent is intended to be mounted horizontally or vertically just by looking at it, though reading the installation instructions is really more sensible.
Taking a look at the product specification sheets for Taco's float type automatic air vents such as the Taco shown at above left, as well as having disassembled a few of them myself makes clear that for proper operation the device depends on free movement of a float-operated vent valve inside the device. The float moves "up and down" as air enters or is vented from the device. The device wants to be installed vertically. At left is a schematic for the Taco Air Vent, adapted from the company's product literature.
Watch out : when installing an air vent, Taco warns as follows: Please note that when installing a new system or retro- fitting an old, you must flush out the disturbed dirt as well as any oily film or solder paste entrained in the system water. If this is not done, it is entirely possible that the internal float mechanism will become clogged open, causing the air vent to leak. The hose may then be fed to a drain or col- lection area designed for the fluid in use.
You can contact Taco directly for assistance I found that the company's product specification sheets easy to download but those documents don't include installation details at. How did it happen that a vertical float valve found itself swimming horizontally on a heating system pipe?
If I'm correct I suspect that previously there was a manual air bleed valve in the location in your photo - not a particularly good spot anyway. Perhaps someone thought "I can improve this mess, I'll just install an automatic float valve in this spot and I won't have to keep fooling with this valve. At left we illustrate another air bleeder that could have been installed horizontally in the location of the float vent in your photo. This is a Taco Vent or "coin vent" suitable to replace the valve in your photo.
The Taco can be installed in the three positions shown, and is operated by hand - no tools are necessary. In the proper position it can vent air automatically from the heating system. About our articles, while I'm glad they have been helpful to you and much appreciate the comment, let me emphasize that questions are very welcome.
Jan 2, Pete Smith said:. Try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly.
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