No. SS2-MGN200-0200 Azbil Corporation - 12 - 4. Calculate the height of the mounting gate and the weir. According to Figure 6, the height from the bottom of diameter 100 mm to center w/2 = 120 mm. Lets assume flow rate = 0 (m/s) with an water-submerged condition, the water level control by height of weir to the bell mouth height is giving below. Height of weir = maintenance height + (w/2) + (D/2) = 100 + 120 + 65 = 285 (mm) Height of water level = height of weir + H1 + H2 = 285 + 166 + 61 = 512 (mm) Therefore, recommendable weir is 285 mm, the required mounting gate height should be 512 mm or more. Calculation example-B Measure the discharge water of flow rate 600 (m3/h) with elbow flange type detector and the width of the mounting gate (1.8 m). 1.Confirm the limitation on the length and width of the open channel in which the detector is installed. In case of the elbow flange type, the length against to width W of open channel is [upstream 2W + detector F to F dimension] therefore, it is required [2W + detector F to F dimension]. Similar to the Calculation example-A, calculate the width of the open channel. Please refer Figure 7, to review an example for a detector with diameter 200 mm and whose detector caring width is 360 mm. The recommended gate installation pitch between the detectors should be 365 mm (5 mm clearance is added). When you secure the maintenance space of 150 mm or more for both sides with the open channel, then 1800 - 150 × 2 = 1500 1500 ÷ 365 > 4 Therefore, the installation of four (detector and dummy) or less becomes possible. 2.Calculate flow velocity. The flow velocity conversion table of page 2 is used and calculated. V = k × Q = k × q × n As mentioned in the table, for a detector diameter of 200 mm, the corresponding flow velocity conversion coefficient k is 0.008842, and measures it with four (detector and dummy), therefore, flow rate for detector is 150 (m3/h). V = 0.008842 × 150 = 1.3263 (m/s) 3.Calculate the required water head difference. Water level calculation formula of water head difference of page 3 is used. k3 uses 0.072 by the constant. H3 = k3 × V2 = 0.072 × (1.3263)2 = 0.127 (m) Moreover, calculate height H4 of Elbow of blowing up. k4 uses 0.028 by the constant. H4 = k4 × V2 = 0.028 × (1.3263)2 = 0.049 (m) 4.Calculate the height of the mounting gate and the weir. For detector with diameter 200 mm, the height from the detector center to the blow out center (H5) is 207 mm. Therefore, the water head difference from detector is H3 + H4 + H5 = 383 (mm) For a detector with diameter of 200 mm, the height from the bottom to its center is 180 mm. To consider the maintenance height, add 100 mm. Height of water level = maintenance height + (W/2) + 383 = 100 + 180 + 383 = 663 (mm) Therefore, it requires the mounting gate with 663 mm or more. Please, read ‘Terms and Conditions’ from following URL before the order and use. http://www.azbil.com/products/bi/order.html (11) 1-12-2 Kawana, Fujisawa Kanagawa 251-8522 Japan http://www.azbil.com/ Specifications are subject to change without notice. No part of this publication may be reproduced or duplicated without the prior written permission of Azbil Corporation. 3rd edition: July 2015 1st edition: Sep. 2008