Toshiba LF414 manual － ５１ －, ６Ｆ８Ａ０８７０, Unit gal/min, Unit m3/h, 2 Flow velocity vs. flow volume

６Ｆ８Ａ０８７０

To select the meter size: See Table 9.2 to find meter sizes within the velocity of 0.3 to 32.8 ft/s (0.1 to 10m/s) for a specified full-scale (measuring range high limit) flow. Select one that has its full-scale velocity between 3.0 and 10 ft/s (1 and 3m/s).

Note: Make sure the full-scale flow rate used for the final planning stage stays within 32.8 ft/s (10m/s) in terms of flow velocity.

Table 9.2 Flow velocity vs. flow volume

Unit: gal/min

Size			Flow rate
(inch)	0.3 ft/s	0.98 ft/s	3.0ft/s	10 ft/s	32.8 ft/s
1/2''	0.2778	0.8403	2.561	8.532	28.01
1''	0.7780	2.334	7.115	23.72	77.81
1 1/2''	1.991	5.975	18.210	60.71	199.2
2''	3.112	9.337	28.460	94.86	311.2
3''	7.965	23.90	72.850	242.8	796.7
4''	12.45	37.35	113.8	379.4	1,245
6''	28.01	84.03	256.1	853.8	2,801
8''	49.80	149.4	455.3	1,518	4,980

					Unit: m3/h
Size			Flow rate
(mm)	0.1m/s	0.3m/s	1m/s	3m/s		10m/s
15	0.0631	0.1908	0.6361	1.908		6.361
25	0.1767	0.5301	1.767	5.301		17.67
40	0.4523	1.357	4.523	13.57		45.23
50	0.7067	2.120	7.067	21.20		70.67
80	1.809	5.428	18.09	54.28		180.9
100	2.827	8.482	28.27	84.82		282.7
150	6.361	19.08	63.61	190.8		636.1
200	11.31	33.93	113.1	229.3		1,131

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