Ampeck,
The European distributors of Viking, Tyco, Victaulic etcetera can
supply you off the shelve with FM approved OS&Y valves, drilled with
PN16 bolt circles.
Drilling it yourselves voids the listing.
Is this a horizontal split case pump?
If so, can't you install the OS&Y valve on the upstream side of the
piece of suction pipe mentioned in NFPA 20 (2013) par. 4.14.6.3.2 ?
Doing so will allow you to connect that suction pipe with a DIN PN16
flange to the pump and with an ASA flange to the OS&Y valve.
On the discharge side you usually won't have an OS&Y valve directly
connected to the pump.
See NFPA 20 (2013) Figure A.4.30(a) and the diagrams in the Appendix.
Best regards,
Frans Stoop
TOS architecture & fire protection
Netherlands <[email protected]>
Tel. +31-24-324 0112
At 16:45 6-9-2013 +0500, you wrote:
This is not quite sprinkler related but it's dealing with a fire
pump and metric versus imperial units.
I have a pump installed by a Turkish contractor. We're revamping the
pump piping to conform as good as we can to NFPA.
Well we tried to bolt our OS&Y valve up to their pump and the bolt
circle is a little smaller then ours. Our valves as all from the USA
and that's what the client wants. So now I'm faced with boring out
the holes or something to make them match up.
The flange has a PN16 which is less than a 150 class flange, which
would be roughly PN20. Besides machine drilling the holes, anyone
run into this before? We have groove flange adapters that will
accommodate the PN16 flange. Just means we'll have to add in a
little piece of pipe and order more groove flange adapters from the states.
Thanks!
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