Richter BCV/F (ASME) Series Check Valves - Manual (Page 4)

Series CV/F, CVV/F, BC/F, BCV/F
Page 4
9550-050-en Revision 10
TM 8462 Edition 02/2012
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
1.2 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.
Pipe screws, flanges to ISO/DIN
Flange
Nominal
size
Screws
Tightenin
g torque
moment
[mm] [ISO/DIN] [Nm]
15 4 x M 12 6
20 4 x M 12 8
25 4 x M 12 10
40 4 x M 16 20
50 4 x M 16 26
65 4 x M 16 40
80 8 x M 16 25
100 8 x M 16 35
150 8 x M 20 65
Pipe screws, flanges to ISO/DIN drilled to ASME
Class 150 or flanges ASME B 16.5 Class 150, raised
face
Flange
Nominal 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
Body screws
Nominal size Screws Tightening torque
[mm] [inch] [ISO/DIN] [in-lbs] [Nm]
15 ½“ 4 x M 12 220 25
20 ¾“ 4 x M 12 220 25
25 1“ 4 x M 12 220 25
40 1½“ 4 x M 16 442 50
50 2“ 4 x M 16 442 50
65 3“ 8 x M 16 442 50
80 4“ 8 x M 16 442 50
100 6“ 8 x M 16 442 50
1.3 Flow rates
CV/F, CVV/F
Nominal size Cv Kv 100
[mm] [m3/h]
15 ½“ 7.3 8.5
20 ¾“ 13.7 16
25 1“ 23.2 27
40 1½“ 83.4 97
50 2“ 105 122
65 2½“ 49 57
80 3“ 258 300
100 4“ 353 410
150 6“ 310 330
BC/F, BCV/F
Nominal size Cv Kv 100
[mm] [m3/h]
15 ½“ 7.3 8.5
20 ¾“ 13.7 16
25 1“ 19 22
40 1½“ 54 61
50 2“ 79 92
65 1½“ -- --
80 3“ 172 200
100 4“ 310 360
150 6“ 310 330
1.4 Minimum differential
pressures
Installation position
horizontal vertical
CV/F 1 bar 20 mbar
CVV/F 0,5 bar 10 mbar
BC/F 15 psi 0,30 psi
BCV/F 7 psi 0.12 psi
If the CVV/F/BCV/F is installed as ventilation valve, it
will close from a density of 1 kg/dm
3 upwards.