Flowmetering Gilflo and ILVA flowmeters 3
Dimensions/weights (approximate) in mm (inches) and kg (lbs)
E
Note: Pressure tappings (2 off located at 180°)
D
A F
B
3.2 15
C
Size
A
B
C
D
E
F
Weight
DN250 (10") DN300 (12")
104 (4.1) 120 (4.7)
204 (8.0) 250 (9.8)
444 (17.5) 530 (20.9)
330 (13.0) 385 (15.2)
35 (1.4) 42.5 (1.7)
41.5 (91.5) 67 (148)
35 (1.4)
Note: Pressure tappings are threaded ¼ " NPT
Safety information, installation and maintenance For full details see the Installation and Maintenance Instructions supplied with the product. Installation note: The following main points are given here for guidance:
1. The ILVA should be mounted with a minimum of 6 straight pipe diameters upstream and 3 downstream. No valves, fittings or cross sectional changes are permitted within these pipe lengths. Where an increase in nominal pipe diameter is required upstream of the flowmeter, the length of straight pipe should be increased to 12 diameters. Similarly, where a ILVA is installed downstream of two 90 degree bends in two planes, a pressure reducing valve or a partially open valve, 12 upstream pipe diameters should be allowed. 2. It is important that the internal upstream and downstream diameters of pipe are smooth. Ideally seamless pipes should be used. It is recommended that slip-on flanges be used to avoid any intrusive weld beads on the internal diameter of the pipe. 3. Care should be taken to install the ILVA concentrically in the line. If this is not done, flow measurement errors may occur.
4. The ILVA should be mounted horizontally. For vertical installations, consult Spirax Sarco. 5. For steam applications, good basic steam engineering practices should be followed:
- Correct line drainage through adequate trapping. - Good alignment and support of associated pipework. - Line size changes achieved by the use of eccentric reducers
Maintenance note: There are no user serviceable parts in the ILVA. A visual check together with confirmation that the orifice/cone reference dimension is within tolerance is possible.
TI-P337-46 EMM Issue 6
Page 3 of 7
ILVA Flowmeter DN250 and DN300
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