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Parmelee sprinkler head
technology
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use in fire control
- In sprinkler system
…sought and found in the Parmelee sprinkler head, introduced in the United States in the 1870s. In this, the normally closed orifice is opened by heat from a fire. Modern versions use a fusible link or a bulb containing chemicals, which breaks at about 160° F (70° C) to open…
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