Richter SRZ-V/F Series Check Valves - Manual (Page 4)

Series SR/F, SR-B/F, SRV/F, SRV-B/F, SRZ-V/F
Page 4
9550-060-en Revision 00
TM 7173
Edition 06/2008
1.2 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 size 25; the
name plate therefore has no CE marking.
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
Arrow for direction of flow
1.1 Tightening torques
All screws greased, tighten in diametrically
opposite sequence!
The tightening torques for pipe screws and cover
screws mentioned must not be exceeded.
The following tightening torques are recommended:
Pipe screws, flanges to DIN/ISO
Nominal
size
Screws
Tightening
torque
[mm] [DIN/ISO] [Nm]
25 4 x M 12 10
40 4 x M 16 20
50 4 x M 16 26
80 8 x M 16 25
100 8 x M 16 35
Pipe screws, flanges ISO/DIN, drilled to ASME Class
150
Nominal size Screws Tightening torque
[mm] [inch] [ASME] [in-lbs] [Nm]
25 1 4 x ½“ 70 8
40 1½ 4 x ½“ 135 15
50 2 4 x J“ 220 25
80 3 4 x J“ 400 45
100 4 8 x J“ 310 35
Cover screws
Nominal
size
Screws
Tightening
torque
[mm] [DIN/ISO] [Nm]
25 4 x M 12 25
40 4 x M 16 50
50 4 x M 16 50
80 8 x M 16 50
100 8 x M 16 50
1.3 Flow rates
SR/F, SR-B/F,
SRV/F, SRV-B/F
SRZ-V/F
Nominal size Kv 100 Kv 100
[mm] [m3/h] [m3/h]
25 15 10
40 35 --
50 50 35
80 125 --
100 170 --
1.4 Minimum differential
pressures
Installation position
horizontal vertical
SR/F 1 bar 20 mbar
SR-B/F 1 bar 20 mbar
SRV/F 0,5 bar 10 mbar
SRV-B/F 0,5 bar 10 mbar
SRZ-V/F 5 mbar
If the SRV/F, SRV-B/F and SRZ-V/F is installed as
ventilation valve, it will close from a density of 1
kg/dm
3 upwards.