Siemens SITRANS FC410, Руководство по эксплуатации, Страница: 97 / 160

Technical data
11.6 Pressure drop curves
FC410 with Modbus
Operating Instructions, 02/2016, A5E33120874-AC
95
Table 11- 12 Process media conditions
Description Specification
Process media temperature (T
s
) (min to max) [°C (F)] -50 to +200 (-58 to 492)
Process media density (min to max) [kg/m
3
(lb/ft
3
] 1 to 5000 (0.06 to 312)
Process media gauge max pressure [bar (psi)] 160 (2321) Hastelloy
100 (1450) st. steel
Pressure drop See Pressure drop curves (Page 95)
Pressure temperature ratings See Pressure - temperature ratings
(Page 95)
11.6 Pressure drop curves
The pressure drop is dimension-dependent and influenced by process media viscosity and
density. Sensors with undersized process connections experience higher pressure drop due
to reduction in inlet/outlet dimensions.
Note
Pressure drop information
Pressure drop information is available on request.
11.7 Pressure - temperature ratings
Pressure - temperature ratings are determined by process connection material and
applicable standards. The tables below detail the allowed maximum process pressure for
sensor variants with stainless steel and Hastelloy measuring tubes.
With two major exceptions, the pressure rating of the flow sensors is independent of the
process medium temperature. Design rules for flange connections in both the EN1092-1 and
ASME B16.5 standards dictate pressure derating with increasing temperature. The charts
below show the effect of process medium temperature on the pressure ratings for the
flanges within the product program.