Richter KNA-D/F Series, Installation And Operating Manual

Page: 5 / 32

Series KNA/F, KNAP/F, KNA-D/F, KNAP-D/F,
Page 5
KNA-S/F, KNAP-S/F
to ASME
9520-030-en Revision 19
TM 10477 Edition 05/2022
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
Section 8 , Flange connection
valve/pipe is leaking.
The following tightening torques are recommended.
Packing screws
Tighten 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 .
Pipe screws
Flange
Nominal
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
Nominal
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 45 398
2“
4 x M16 45 398
3“
8 x M16 50 442
4“
6 x M20 60 531
6“
8 x M20 150 1330
8“/6“
8 x M20 150 1330
8“
12 x M24 175 1549
1.4 Actuating torques
Test medium: water 68 °F (20 °C)
Higher actuating torques may occur with other media.
Stem unit
DN
Δp 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
Al
2
O
3
-ball
DN
Δp in psi
≤ 45
85 145 235
max.
adm.
[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
1.5 Flow rate value
Nominal size Kv100 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