1 name plate, ce and body markings, 2 v-control ball/stem unit, 3 tightening torques – Richter KNARP-S/F Series Control Ball Valves User Manual
Page 4: Name plate, ce and body markings, V-control ball/stem unit, Tightening torques, Series series knar/f, knarp/f, knar-d/f, knarp-d/f, Knar-s/f, knarp-s/f, Asme
Series Series KNAR/F, KNARP/F, KNAR-D/F, KNARP-D/F,
Page 4
KNAR-S/F, KNARP-S/F
ASME
9520-082-en
Revision 04
TM 7377
Edition 11/2008
1.1 Name plate, CE and body
markings
The stainless steel name plate is undetachably riveted
to the body.
If the operator attaches his identification, it must be
ensured that the valve matches the application in
question.
Example of name plate with CE marking:
No CE marking is permissible for the sizes ½“ and ¾“
the name plate therefore has no CE marking.
Example: Additional name plate KNAR, KNARP
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 Bei 3", 4",
6" and 8" are 2 spring gland followers 502.
Pipe screws
Flange nom. size Screws
Tightening torque
[inch]
[ASME]
[in-lbs]
[Nm]
½"
4 x ½“
45
5
¾"
4 x ½“
55
6
1"
4 x ½“
70
8
1½"
4 x ½“
135
15
2"
4 x O“
220
25
2½"
4 x O“
265
30
3"
4 x O“
400
45
4"
8 x O“
310
35
6"
8 x ¾“
710
80
8"
8 x ¾“
1020
115
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
398
2"
4 x M16
45
398
3"
8 x M16
50
442
4"
8 x M16
60
531
6"
8 x M20
150
1330
8"
8 x M20
150
1330
Control characteristics
Direction of flow
Flow rate kvs and cv