Relief valve .net. |
When a water heater explodes the force generated is equal to that caused by a stick of dynamite (other sources say two pounds of dynamite for a thirty gallon unit). |
In summary, potable water boilers, water heaters and storage tanks are limited to
a maximum temperature of 210°F. Most of them supply water in the range of 120
to 140°F. Therefore they can make use of pressure-temperature type relief valves
for overpressure protection. The pressure-temperature relief valve provides an extra level of safety in helping to eliminate the steam explosion hazard. Temperature controls (limit switches, gas valves, heating element thermostats, etc.) need to be regularly checked and properly maintained. But pressure-temperature relief valves can back up temperature limit controls in the event of control malfunction, runaway firing conditions, corrosion and pressure transients. Regardless of the safety valve type, they need to be installed correctly and tested annually. With a little bit of attention to this equipment, we can all look forward to an uneventful and pleasurable hot shower- especially critical for those of us who need reviving some mornings! |
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Important links |
In surveys of U.S. customers who chose to participate in a water heater rental program: one third chose because
of no upfront cost; one third chose because of no maintenance; one third chose because of low operating costs. This link |
Residental water heaters suggested specs ( Vaughn) |
The ANSI Standard for Residential Type Water Heaters, ANSI Z21.10.1, requires that IF the water heater manufacturer recommends that the relief valve be periodically tested, then the manufacture must provide instructions on performing the test. The standard can be obtained from CSA International (Formerly AGA Labs) by calling 216.524.4990. You can also order the standard online at http://www.csa-international.org/english |
Interesting? not sure if Vaughn has CSA approval ( or wantsCCSA approval) It is a way to avoid Ansi standard listed above.
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Who is Vaughn? Vaughn - The Pioneer in Off-Peak Water Heaters. There is no other water heater manufacturer like Vaughn. Vaughn is a unique company with a unique product and a unique market. Vaughn makes only electric water heaters and sells them almost exclusively to electric utilities. Since 1955, Vaughn has been providing electric water heaters for the utility industry. To many customers, Vaughn has been the exclusive supplier of water heaters throughout the life of their rental program. |
Only Temp and pressure relief valve they (Vaughn) supply ( commercial) |
P.O. Box 5431 · Salisbury, MA 01952-5431 · TEL. (978)462-6683 FAX (978)462-6497 WEB
SITE: www.vaughncorp.com COMMERCIAL ELECTRIC WATER HEATERS SUGGESTED SPECIFICATION FORM Water heaters shall be VAUGHN HYDRASTONEÒ electric model __________, nominal capacity of ___________ U.S. gallons. Tank shall be of steel, lined with HYDRASTONEÒ and mounted on three heavy duty legs, have a rated working pressure of 150 p.s.i. and shall be tested to A rated and listed temperature and pressure relief valve shall be included with each commercial water heater. The heater shall be listed by Underwriter's Laboratories to comply with U.L. 1453. Tank shall be enclosed in a plastic jacket, base and top. Tank shall have a minimum of 2" of urethane foam insulation. Tank shall be backed by a 5 year warranty. Vaughn does not supply a Temperature and pressure relief valve on any residental water heaters?????? only supplied on a commerical heater WHY??? |
Companies to add to class action |