Cashco 521 - Manual (Page 3)

IOM-521 3
12. Tighten fl ange stud nuts uniformly in a cross-
ing pattern. Ensure fl ange facing align ment.
Do not use fl ange bolting to “pull” fl ang es
into alignment. Tighten fl ange bolting to
torque levels of Table 2 in increments of
1/2 rev o lu tion to ensure uniform loading of
valve’s raised facing.
tem per a ture; the re main ing pipe (inlet or
outlet) should be sup port ed and guided to
ensure uni di rec tion al ex pan sion/con trac-
tion. Properly align prior to installing valve
with required fl ange bolting.
9. The Model 521 is designed for a fl anged
con nec tion that is gasketless. The raised
face portion of end con nec tion fl ange serves
as the gasket.
10. An ANSI/DIN adapter gasket (17) is sup-
plied with all Model 521 valves provided
with DIN 16/25/40 end con nec tions. See
Figure 3. The purpose of this adapter gasket
(17) is to en sure prop er compression of the
body’s TFE core (1.2) when used with DIN
piping.
To assist during installation, place pipe
thread sealant on one side of adapter gasket
(17), and press the sealant covered side of
the adapter gasket over the exposed TFE
of the body core (1.2) end connection. The
sealant will hold the adapter gasket (17)
to its proper location prior to joining with a
piping fl ange.
NOTE: If the installed Model 521 has had
the fl ange bolting over-torqued, distortion
of TFE core (1.2) will occur. If dimension
“X” in Figure 4 is 0.040" (1 mm) or less, a
gasket is rec om mend ed upon reinstallation.
If dimension “X” is less than 0.020" (0.5 mm),
body re place ment is recommended.
Figure 3: ANSI/DIN Adapter Gasket
11. Flange bolting must be of the stud-type.
Each fl ange is drilled and tapped to accept
studs. The studs should be of a length to
penetrate the full depth of the bolt hole thru
the fl ange; DO NOT USE STUDS/BOLTS
OF TOO SHORT LENGTH. See Table 1
for stud size/thread/length requirements.
TABLE 1
Body Size End Connection Flange Bolting
In. (DN) 150# 300# DIN 16/25/40
1/2" DN15
1/2" Ø - 1-3/4"
13 UNC-2B
1/2" Ø - 1-3/4"
13 UNC-2B
14 mm Ø - 45 mm
M12x1.75-6H
1" DN25
1/2" Ø - 2"
13 UNC-2B
5/8 Ø - 2"
11 UNC-2B
14 mm Ø - 52 mm
M12x1.75-6H
1-1/2" DN40
1/2" Ø - 2-1/2"
13 UNC-2B
3/4" Ø - 2-3/4"
10 UNC-2B
18 mm Ø - 70 mm
M16x2.0-6H
2" DN50
5/8" Ø - 2-1/2"
11 UNC-2B
5/8" Ø - 2-3/4"
11 UNC-2B
18 mm Ø - 70 mm
M16x2.0-6H
No. Bolt Holes 4 4 or 8 * 4
* 2" - 300 # requires 8 bolt holes; all others 4.
TABLE 2
Body Size End Connection Flange Bolting
In. (DN) ANSI-150 ANSI-300 DIN 16/25/40
1/2" DN15 10 - 12 ft-# 10 - 12 ft-# 15 - 18 N-m
1" DN25 10 - 12 ft-# 12 - 14 ft-# 21 - 25 N-m
1-1/2" DN40 10 - 12 ft-# 14 - 17 ft-# 18 - 22 N-m
2" DN50 35 - 40 ft-# 17 - 20 ft-# 50 - 60 N-m
Figure 4: End Connection - Partial Section