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Product Highlights
Specs
| Application: | Zoning |
|---|---|
| Size: | 1/2" |
| Voltage: | 24 VAC |
| Connection Type: | Sweat |
| Hertz: | 60 |
| Amperage: | 0.48 |
| Flow Capacity (Cv): | 4.9 |
| Max Operating Pressure: | 300 psi |
| Body Pattern: | 3-Way |
| Fluid Temperature Range: | 20°F to 220°F |
| Position: | Normally Closed |
| End Switch: | Yes |
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Cheap Plastic Manual Override
Worked perfectly
Installs Easily
Exact replacement fast delivery
Perfect customer service
I will continue to buy this product !
Working correctly
Work just fine
Used these to set up a new boiler
I will buy again and again !
First Time
Product Q&A
19 QuestionsQ: Can these valves be configured for either "normally open" or "normally closed"? Or do you need to buy a specific model number to be normally open and a different model number to be normally closed?
Asked by 14 years ago
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Verified Reply- PexSupply StaffYou would need to specify at the time of order. This particular zone valve is normally closed.
Q: Should I step up a size, need to install cutoff valve on existing 3/4" copper mono loop system and am worried that the opening in the ball valve is only about 3/8" Will this restrict the flow too much and if so would it make sense to move up to the 1" or 1 1/4" valve so as not to restrict the flow? Thanks
Asked by Mike 14 years ago
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Verified Reply- PexSupply StaffThe 3/4" valve is equivalent to about 8.4" of pipe when calculating flow, while the 1" valve equals 47.4". Since the bore sizes on these valves are about the same, stepping up a size probably wouldn't be worth it.
This valve has one of the highest CV ratings in the market. CV= the amount of 60 degree water in gal/min. flowing through a fully open valve at 1 psi. It is the least resistant to flow than most other zone valves. The flow thru one part of a pipe is the same as the flow thru any other part of the pipe. What happens is the water speed up passing thru the valve. The 3/4" and 1" valve are the same except for the size of the copper pipe that can be soldered to it. You know, the max flow thru 3/4" pipe is about 4 gal/min. (about 3'/sec.). If you need that flow you can always use a bigger pump.
The basic valve on for every pipe size of Zone Sentry is 1/2 inch. You gain nothing by going to a larger pipe size hoping to get more flow. I have used many of these in all sizes. The small sized ball opening does not seem to have any negative affect on water flow or heat capacity. These are the only kind of zone valves I install now. The N.O. valves are also very effective in situations where you want to drain a system when there is a loss of power as in a solar draindown system.
Q: I am running an open system. Will this valve work for me?
Asked by 15 years ago
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Verified Reply- PexSupply StaffThis valve is only recommended for closed-loop systems. It will rust in an open system. You may want to take a look at Taco's geothermal zone valves, which are designed for use in open systems.
I have one of these setup in a open system, geothermal pump / dump. It has worked flawlessly, positive shut-off between the 60psi well system and 0psi dump.
Q: I need to replace the electronic portion of a Taco ESP 075C2 zone control valve. can I buy just this part or do I need to buy the entire valve assembly?
Asked by 15 years ago
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Verified Reply- PexSupply StaffThe ESP valves are obsolete, having been replaced first by Taco's EBV valves and now by the Zone Sentry. The Zone Sentry head (part ZA024Q4A1) works with both the ESP and EBV valve bodies.
Q: What is the capacity (Cv) of this valve?
Asked by 15 years ago
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Verified Reply- PexSupply StaffPlease refer to the chart on the right side of the following document: http://s3.pexsupply.com/manuals/1296597322000/46579_PROD_FILE.pdf
Q: Do these zone heads fit on the older EBV zone valve bodys ?
Asked by Big E 15 years ago
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Verified Reply- PexSupply StaffYes, they do.
Q: can this valve be used in a vertical position,
Asked by 15 years ago
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Verified Reply- PexSupply StaffYes, it can be positioned vertically.
Q: What is the life expectancy of these valves? I am constantly replacing the motors on the Honeywell valves, what is the equivalent replacement part and how much dose it cost?
Asked by Bill 15 years ago
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Verified Reply- PexSupply StaffThe life expectancy of these motors is about 7-12 years.
Q: I have an A and B on my 3\4 sentry zone valve sweat Do I aweat the A on the boiler side or the B
Asked by iew 15 years ago
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Verified Reply- PexSupply StaffIt can be sweated on either side. See page 1 of the manual below for more information. http://s3.pexsupply.com/manuals/1296597322000/46578_PROD_FILE.pdf
This valve is bi-direction so it does not matter which side you connect to the boiler.