Pipeline ancillaries Ball valves
10
K v values DN
40
50
65
80
100
K v
81
103
197
248
581
For conversion: C v (UK) = K v x 0.963 C v (US) = K v x 1.156
Operating torque (N m) DN 40
50
65
80
100
N m
20
25
50
70
100
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.
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 soft parts.
How to order
Si = Carbon and graphite reinforced PTFE - PDR 0.8 Vi = Virgin PTFE
Model
Seat material
Body type
Specify
J = Jacketed body
2 = Carbon steel 3 = Stainless steel
Material
Body material
7.3.169
Example: 1 off Spirax Sarco DN50 M21SiJ2 ISO ball valve having flanged EN 1092 PN40 connections.
Optional extras: - Self-venting ball. - Extended stems to allow full insulation: 50 mm (2") for DN40 and DN50 sizes and 100 mm (4") for DN40 to DN100 sizes. - Lockable handle. - 100 mm extended stem with lockable handle.
10.3 168
TI-P133-99 CMGT Issue 2
Page 8 of 10
M21SiJ ISO and M21ViJ ISO Jacketed Reduced Bore Ball Valves
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