Richter BVA Series, Installation And Operating Manual

Page: 5 / 30

Series KNA/F, KNAP/F,
KNA-D/F, KNAP-D/F,
Page 5
KNA-S, KNAP-S,
ASME
9520-080-en_USA Revision 15
TM 9549 Edition 07/2016
1.3 Tightening torques
All screws greased, tighten in diametrically
opposite sequence!
The tightening torques for pipe screws and body
screws mentioned must not be exceeded. For an
exception, see Chapter 8 , Flange connection valve /
pipe is leaking.
The following tightening torques are recommended:
Packing screws
Thighten packing gland follower 503 until spring gland
follower 502 is in contact without any gap. With 3", 4",
6", 8”/6” and 8” they are 2 spring gland followers 502 .
See also Chapter 10.4 and 10.5
Pipe screws
Flanges
nom. size
Screws Tightening torque
[inch] [ASME] [Nm] [in-lbs]
½“ 4 x ½“ 5 45
¾“ 4 x ½“ 6 55
1“ 4 x ½“ 8 70
1½“ 4 x ½“ 15 135
2“ 4 x ⅝“ 25 220
3“ 4 x ⅝“ 45 400
4“ 8 x ⅝“ 35 310
6“ 8 x ¾“ 80 710
8“ 8 x ¾“ 115 1020
Body screws
Nom. size Screws
Tightening
torque
[inch] [ISO/DIN] [Nm] [in-lbs]
½“ 4 x M12 35 310
¾“ 4 x M12 35 310
1“ 4 x M12 35 310
1½“ 4 x M16 45 400
2“ 4 x M16 45 400
3“ 6 x M16 50 445
4“ 6 x M20 60 531
6“ 8 x M20 150 1335
8“/6“ 8 x M20 150 1330
8“
12 x M24 175 1549
1.4 Breakaway torques
Test medium: water 68 °F (20  C)
Higher breakaway torques may occur with other
media.
Ball/stem unit
DN
 p in psi
≤ 45 85 145 235 max. adm
[inch] [in-
lbs]
[in-
lbs]
[in-
lbs]
[in-
lbs]
[in-lbs]
½“ 71 71 71 89 620
¾“ 71 71 71 89 620
1“ 106 106 106 106 620
1½“ 177 177 177 221 1990
2“ 221 221 221 266 1990
3“ 531 531 575 708 4425
4“ 708 708 797 1505 4425
6“ 1770 2213 3098 -- 19470
8“/6“ 1770 2213 3098 -- 19913
8“ 5310 5310 5310 -- 19470
1 in-lbs = 0.112 Nm
Al
2
O
3
-ball
DN
 p in psi
≤ 45 85 145 235
max.
zulässig
[inch] [in-
lbs]
[in-
lbs]
[in-
lbs]
[in-
lbs]
[in-lbs]
½“ 89 89 89 106 248
¾“ 89 89 89 106 248
1“ 106 106 106 106 248
1½“ 177 221 266 398 708
2“ 221 266 310 443 1062
3“ 531 885 1416 1947 2215
4“ 708 1151 1770 2478 3098
6“ 3098 3983 5310 -- 10620
8“/6“ 3098 3983 5310 -- 10620
1 in-lbs = 0.112 Nm
1.5 Flow values
Nom. size kv
100
[m
3
/h] Cv
[inch] [m
3
/h] [US gpm]
½“ 17.2 20
¾“ 30.9 36
1“ 60 70
1½“ 190 221
2“ 280 326
3“ 587 684
4“ 1250 1456
6“ 2800 3262
8“/6“ 3200 3728
8“ 6000 6990