Pipeline ancillaries Ball valves
10
Kv values DN
15
20
25
32
40
50
65
80
100
150
Kv
10
10
30
40
81
103
197
248
581
735
For conversion Cv (UK) = Kv x 0.963 Cv (US) = Kv x 1.156
Operating torque (N m) DN 15 20
25 10
32 15
40 20
50 25
65 50
80 70
100 100
150
N m 155 Note: The torque figures shown are for a valve that is frequently operated at the maximum operating pressure. Valves that are subject to long static periods, may require a greater break-out torque. 8 8
Safety information, installation and maintenance For full details see the Installation and Maintenance Instructions supplied with the product. Welding Only the models that have connections designed for welding (SW, BW, Imperial Tube connections) should be welded. Valves with flanged connections must not be welded to avoid damages to the valve and/or injury to personnel.
How to order
S = Carbon and graphite reinforced PTFE - PDR 0.8 V = Virgin PTFE
Model
Seat material
Specify
Material 2 = Zinc plated carbon steel 3 = Stainless steel Example: 1 off Spirax Sarco DN50 M21Si2 ISO ball valve having flanged EN 1092 PN40 connections. Body material
Optional extras: - Self-venting ball. - Extended stems to allow full insulation: 50 mm (2") for DN15 to DN50 sizes and 100 mm (4") for DN15 to DN150 sizes. - Lockable handle. - 100 mm extended stem with lockable handle.
7.3.160
10.3 157
TI-P133-77 CMGT Issue 5
Page 7 of 9
M21Si ISO and M21Vi ISO Reduced Bore Ball Valves DN15 to DN150 Flanged PN40
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