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

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Series KNAR/F, KNARP/F, KNAR-D/F, KNARP-D/F,
Page 4
KNAR-S/F, KNARP-S/F
ASME
9520-032-en Revision 15
TM 9549 Edition 11/2018
1.1 Type 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
♦ Foundry 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:
♦ flow direction
♦ 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. With 3", 4",
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 45 400
2"
4 x M16 45 400
3"
8 x M16 50 445
4"
8 x M16 60 531
6"
8 x M20 150 1335
8"
8 x M24 100 855
flow direction
Control characteristics
Flow rate kvs and cv