Flowmetering Gilflo and ILVA flowmeters 3
Dimensions/weights (approximate) in mm (inches) and kg (lbs)
Size
A
B
Weight
DN50* (2") DN80 (3") DN100 (4") DN150 (6") DN200 (8") DN250 (10") DN300 (12") DN400* (16")
480 (18.9) 543 (21.4) 716 (28.2) 797 (31.4) 990 (39.0) 1458 (57.4) 1599 (63.0) 1995 (78.5)
89 (3.5) 114 (5.7) 168 (6.6) 219 (8.6)
14 (31) 22 (49)
B
A
48 (106) 87 (192) 123 (271) 257 (567) 340 (750)
324 (12.8) 406 (16.0) 457 (18.0) 610 (24.0)
Pressure tappings: The H.P. and L.P. pressure tappings are threaded ¼ " NPT (female).On the DN400 flowmeter, the pressure tappings are on the body.
3.2 33
900 (1984)
* Note - DN50 flowmeter: flanges on the PN40 are thicker (to ASME 300, 22.2 mm) to accommodate pressure tappings.
Safety information, installation and maintenance For full details see the Installation and Maintenance Instructions supplied with the product.
Installation: Installation and Maintenance Instructions are supplied with each flowmeter. The following main points are given for guidance:-
1. The Gilflo flowmeter should be installed 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 pipe diameter is necessary upstream of a Gilflo flowmeter, the length of straight pipe should be increased to 12 diameters. Similarily, where a Gilflo flowmeter is installed downstream of two 90 ° bends in two planes, a pressure reducing valve or a partially open valve, 12 pipe diameters should be allowed. 2. The Gilflo flowmeter should normally be mounted horizontally. Vertical installation (with flow vertically downward) is also permissible and must be specified at the time of ordering. Ensure flow is in the correct direction and avoid reverse flow. 3. For steam applications, good basic steam engineering practice should be followed: - Ensure all pipework is adequately lagged. - Ensure correct line drainage through adequate trapping. - Where practicable, fit a steam separator upstream of the flowmeter. This should be drained using a float trap set.
- Ensure good alignment and support of all associated pipework. - Achieve line size reduction by the use of eccentric reducers.
- Avoid close installation (less than 25 pipe diameters) upstream or downstream of a pressure reducing valve or modulating valve. 4. See the 'Gilflo flowmeters - system overview', TI-S41-10 which provides information on the installation of a Gilflo flowmetering system.
Maintenance note: There are no user serviceable parts within the Gilflo 'B' flowmeter.
TI-P337-08 EMM Issue 9
Page 3 of 7
Gilflo 'B' Flowmeter Pipeline Unit
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