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Some good stuff for your consideration, products that can I think can really benefit you if you're a contractor. In no particular order:
Bell & Gossett Isolation Flange This is a full-port, non-ferrous ball valve with a free-floating flange that your contractor customer can rotate in any direction. It does away with the need to line up the bolt holes in the circulator flanges with the bolt holes in the isolation ball valve. It comes in ¾”, 1” and 1-1/4” NPT as well as sweat, and it will fit any manufacturer’s circulators. This one has been getting a lot of attention on the Wall at HeatingHelp.com. The Wallies that have tried it are 100% sold.
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Differential pressure regulators This is a standard item on most European hydronic systems, but just coming into its own in North America. It’s a self-contained valve that pipes into the circulator’s discharge and allows water to flow from the circulator back to the return side of the system as necessary, depending on how many circuits are calling for heat. As it works, it mimics the system’s normal pressure drop, and that keeps the circulator nailed to the design point on its curve. So if your contractor is using zone valves (either electric or non-electric), the circulator’s flow rate will always be the same, no matter how many zones call for heat. Differential pressure regulators solve the problem of velocity noise and water hammer, things that plague hydronic systems when circulators are allowed to build too much pressure. You can get them from Danfoss, Honeywell, and others.
ESBE Thermic Valve This is one of those simple products that meets a big challenge with modern hydronic systems. When you bring low-temperature water back to most boilers (as you will with radiant and old gravity systems) you face the possibility of flue gas condensation and thermal shock to the boiler. This valve from ESBE (available through Danfoss) is self-contained and pipes into either the supply or return of the boiler. It will allow the boiler to reach its optimum temperature before letting the return water enter. It’s similar in operation to the thermostat in your car’s heating system, and it does away with the need to manually balance a boiler bypass line. A simple solution to a big problem.| Dan Holohan - [Intro] | [Email] | [Website] |
| The views expressed in this article are those of the individual author and do not necessarily reflect the views of the management or staff of MasterPlumbers.com |
