44
Kv values Full lift capacity for safety valve sizing purposes are shown below: Size 1" - DN25 1¼"- DN32 Control systems Pressure reducing/surplussing valves
1½"- DN40
2" - DN50
For conversion: Cv (UK) = Kv x 0.963 Cv (US) = Kv x 1.156
Kv
9.3
11.1
15.7
16.2
Dimensions/weights (approximate) in mm (inches) and kg (lbs)
E Withdrawal distance
D
4.6 26
C
A B G
F Withdrawal distance
Scr. BSP/NPT PN16 ANSI 150 JIS 10
Weight
Size
A
B
B
B
C
D
E
F
G Scr.
*Flg
174 (6.85) 179 (7.05)
170 (6.69) 174 (6.85) 183 (7.20) 186 (7.32)
170 (6.69) 175 (6.89)
4.40 (9.7)
5.90 (13)
DN25 - 1"
4.20 (9.26) 4.95 (10.9) 4.75 (10.5)
7.65 (16.9) 8.55 (18.8) 9.40 (20.7)
DN32 - 1¼"
134 (5.28)
67 (2.64)
153 (6.02)
90 (3.54)
25 (0.98)
84 (3.31)
DN40 - 1½"
186 (7.32)
180 (7.09)
DN50 - 2"
*Note: Flanged weights are typical of the BRV73 model and the figures quoted are based on the PN16 version.
Safety information, installation and maintenance For full details see the Installation and Maintenance Instructions (IM-P210-04) supplied with the product. Installation note: The valve should be installed in a horizontal pipeline with the direction of flow as indicated by the arrow on the valve body. How to order Example: 1 off Spirax Sarco 1" screwed BSP BRV71 pressure reducing valve with SG iron body, stainless steel bellows and fitted with an orange spring for a downstream pressure control of 3.5 to 9.0 bar g (50.8 to 131 psi g).
TI-P210-01 CTLS Issue 6
Page 6 of 7
BRV71 and BRV73 SG Iron Pressure Reducing Valves
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