Flowmetering Gilflo and ILVA flowmeters 3
Pressure/temperature limits
Pressure psi g
0 145 290 435 580 725 870 1015 1160 1305 1440 752 572 392 212 32 0 10 20 30 40 50 60 70 80 90 99.3 Steam saturation curve
400 300 200 100 0
Pressure bar g
The product must not be used in this region.
Body design conditions
ASME 600
PMA Maximum allowable pressure
99.3 bar g @ 38 °C
1440 psi g @ 100 °F
TMA Maximum allowable temperature
400 °C @ 58.9 bar g
752 °F @ 854 psi g
3.2 14
Minimum allowable temperature
-29 °C
-20 °F
PMO Maximum operating pressure is dependant on the flange specification Minimum operating pressure
0.6 bar g
9 psi g
TMO Maximum operating temperature
400 °C @ 58.9 bar g
752 °F @ 854 psi g
Minimum operating temperature Note: For lower operating temperatures consult Spirax Sarco.
-29 °C
-20 °F
Maximum viscosity
30 centipoise
D PMX Maximum differential pressure
498 m bar
7.2 psi
Designed for a maximum cold hydraulic test pressure of:
149 bar g
2161 psi g
Performance The ILVA is used in conjunction with linearising electronics such as Spirax Sarco flow computers or M750 display unit. Alternatively the output signal linearisation can be performed on an EMS/BEMS or equivalent.
Accuracy when used with Spirax Sarco flow computers or M750: ±1% of measured value from 5% to 100% of maximum rated flow. ±0.1% FSD from 1% to 5% of maximum rated flow. Repeatability better than 0.25% Turndown: up to 100:1
Caution : The Scanner 2000 mass flow transmitters can be configured at the factory to work with a single, specific ILVA flowmeter. For correct operation the configured transmitter must always be installed with its allocated flowmeter. Labels on the packaging give the serial numbers of the matched products.
Pressure drop The maximum pressure drop across the ILVA pipeline unit is 498 m bar (200 ins water gauge) at maximum rated flow.
Flow capacity To determine the capacity of the ILVA for different fluids, it is necessary to calculate the equivalent water flowrate Q E (in l/min) as described in Step 1, under the section 'sizing the ILVA' then selecting the appropriate size of flowmeter from the Table under Step 2 overleaf.
How to order Example: 1 off Spirax Sarco DN250 ILVA flowmeter for installation between EN 1092 PN40 flanges. The body material is to be 316 stainless steel. The flow medium will be saturated steam at 10 bar g and the maximum flow will be 28 000 kg/h.
TI-P337-46 EMM Issue 6
Page 2 of 7
ILVA Flowmeter DN250 and DN300
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