I agree, George.  And as long as owner, AHJ, insurance interests, judge &
jury agree, there is no issue.

Ed Kramer
Littleton, CO


>The overriding concern is for cleanliness, in a HEPA filtered clean
>room/operating room environment.
>The application requirements for preventing foreign materials outweigh the
>requirement for QR, IMHO.
>
>The gap is for prewarming of the fusible link/glass bulb
>
>glc
>
>-----Original Message-----
>From: [EMAIL PROTECTED]
>[mailto:[EMAIL PROTECTED] On Behalf Of Ed Kramer
>Sent: Wednesday, October 31, 2007 2:22 PM
>To: [email protected]
>Subject: RE: Clean room sprinkler heads w/ covers
>
>It doesn't answer your question, but I noticed that for a least one of the
>manufacturers, if the air/dust seal is used, the sprinkler is no longer
>quick response.  A bit of an issue in light hazard occupancies.
>
>Ed Kramer
>Littleton, CO
>
>
>>Interesting:  The cut sheet on the sprinkler has the following in it:
>>
>>When properly installed, there is a
>>nominal 3/32 inch (2,4 mm) air gap
>>between the lip of the Cover Plate and
>>the ceiling, as shown in Figure 2. This
>>air gap is necessary for proper operation
>>of the sprinkler.
>>
>>They then go on to seal this gap with the air and dust seal.
>>
>>I was under the impression that the gap was critical for the proper
>>operation of the sprinkler, but this doesn't seem to be the case.  This
>>same condition exists for the Reliable.
>>
>>Can someone explain why this gap is not required when the seal is
>>applied, but is required otherwise.
>>
>>Thanks
>>
>>Pete
>>VA
>
>
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