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  Paper Details                 Browse papers by sector
A Technical Analysis: Variables That Affect The Performance Of Dry Pipe Systems
Author            : James Golinveaux
Designation    :Sr. Vice President,
Company        : Tyco Fire & Building Products
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Synopsis
Previously, there have not been any readily available methods for predicting the time required to deliver water to the test connection of a dry sprinkler system. The Fire Protection Engineering Handbook1 publishes a method to calculate the trip time of a dry pipe valve, but this is only a relatively minor part of the water delivery time. Until now, a designer could never know whether his system met the 60 second water delivery criterion for dry systems with a capacity greater than 750 gallons (2839 liters) until it was installed and actually tested. If it didn’t meet the criterion, it was far too late to find that out! Only when you have stood at the inspectors test valve, opened it while staring at a stopwatch, and wondered what to do when the water took 68 seconds to reach the test outlet can you appreciate the frustration of the engineers/designers task. Now, Tyco Fire & Building Products has introduced an innovative tool that permits a user to accurately simulate the acceptance trip test of dry pipe systems prior to the actual installation.

Those familiar with dry pipe system designs know there are four basic factors that affect the design, installation and performance of dry pipe systems. These four principles are:
  • Air and Water Supply Pressures
  • System Capacity and Piping Configuratio
  • Size of Test Sprinkler
  • Dry Pipe Valves

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