DB-300-912
Clean pipes
Use only pipelines and system components which are
• clean and dry inside (free from slag, metal filings,
rust and phosphate coatings) and
• which are delivered with an air-tight seal.
4.7.1 Mounting the pressure relief valve
Internal thread 3/8-18 NPTF: Screw in the pressure re-
lief valve.
External thread 1 1/4-12 UNF: Screw the pressure re-
lief valve into the adaptor. Then fasten the adaptor at
the pressure vessel with the union nut.
Available adaptors see figure 3, page 12.
366 005 03
SW 22
1/2"-14 NPTF
1 1/4"-12 UNF
366 005 04
SW 12
G 1/2
1 1/4"-12 UNF
366 005 05
SW 22
3/8"-18 NPTF
1 1/4"-12 UNF
366 005 01
SW 12
1 1/4"-12 UNF
1/2"-14 NPTF
366 005 02
SW 22
G 1/2
1 1/4"-12 UNF
Fig.3: Adaptors for the pressure relief valve
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