General information Product limitations
7
E Sometimes end connections or internal components may restrict the operating envelope of the product below the standard rating. Care must therefore be taken in selecting appropriate end connections . In this case the product should not be used in area 'e' and will be worded:
E
The product should not be used in this region because...(the actual reason will depend on the product being described).
Pressure bar g
F If a product should not be used above a certain temperature, or an ancillary product is required to operate above a certain limit then it will be tinted and worded appropriately. e.g.:
F
High temperature bolting required for use in this region (the actual reason will depend on the product being described).
Pressure bar g
An example of a finished diagram:
A
2
1
Steam saturation curve
4
5
3
C
B
Pressure bar g
1
The product must not be used in this region.
2 3
High temperature bolting is required for use in this region.
7.4 6
The product should not be used in this region or beyond its operating range as damage to the internals may occur.
4 A - C Flanged end connections EN 1092 PN16.
5 A - B Flanged end connections EN 1092 PN25 or ANSI B 16.5 Class 300.
11.4.7
TI-S24-41 CH Issue 3
Page 2 of 5
Pressure / Temperature Limits for Control Valves
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