Richter KNRP-D/F Series Control Ball Valves - Manual (Page 4)

Series Series KNR/F, KNRP/F, KNR-D/F, KNRP-D/F
Page 4
9520-053-en Revision 04
TM 7333 Edition 10/2008
Example: Additional name plate KNR
Body identification :
The following are visible on the body according to DIN
EN 19 and AD 2000 A4:
Nominal size
Rated pressure
Body material
Manufacturer's identification
Melt number/Foundry identification
Cast date
1.2 V-control ball/stem unit
The advantage of a single-piece v-control ball/stem
unit is the play-free power transmission. This applies
in particular to plastic-lined components.
The end of the stem journal or flat pivot point is
marked with:
direction of flow
flow rate Kvs and Cv
lining material
As viewed from above, closing is in clockwise
direction.
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. In DN 80,
100, 150 and 200/150 are 2 spring gland followers
502.
Pipe screws
Flange
nom. size
Screws
Tightening
torque
[mm] [ISO/DIN] [Nm]
15 4 x M12 6
20 4 x M12 8
25 4 x M12 10
40 4 x M16 20
50 4 x M16 26
80 8 x M16 25
100 8 x M16 35
150 8 x M20 65
200 12 x M20 100
Pipe screws, flanges ISO/DIN drilled to ASME
Class 150
Flange nom.
size
Screws Tightening torque
[mm] [inch] [ASME] [in-lbs] [Nm]
15 ½" 4 x ½“ 45 5
20 ¾" 4 x ½“ 55 6
25 1" 4 x ½“ 70 8
40 1½" 4 x ½“ 135 15
50 2" 4 x O“ 220 25
65 2½" 4 x O“ 265 30
80 3" 4 x O“ 400 45
100 4" 8 x O“ 310 35
150 6" 8 x ¾“ 710 80
200 8" 8 x ¾“ 1020 115
Body screws
Nom. Size Screws Tightening torque
[mm] [inch [ISO/DIN] [Nm] [in-lbs]
15 ½" 4 x M12 35 310
20 ¾" 4 x M12 35 310
25 1" 4 x M12 35 310
40 1½" 4 x M16 45 398
50 2" 4 x M16 45 398
80 3" 8 x M16 50 442
100 4" 8 x M16 60 531
150 6" 8 x M20 150 1330
200/150 8/6" 8 x M20 150 1330
Control characteristics
Direction of flow
Flow rate kvs and cv