Capacities of 8697 Metering Orifice Plates (US Customary Units) 90-387 Plates, 0.1 - 1.0"w.c.
170.00
215.00
160.00
205.00
195.00
150.00
185.00
Plate No. = cfh Natural Gas with 3 ½ "w.c. drop (8.72 mbar)
140.00
175.00
130.00
165.00
120.00
155.00
387
145.00
110.00
324
135.00
100.00
125.00
270
90.00
115.00
105.00
80.00
225
95.00
70.00
186
85.00
60.00
75.00
156
50.00
65.00
130
55.00
40.00
108 90
45.00
30.00
35.00
20.00
25.00
10.00
15.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
Pressure Drop, inches of water column ("w.c.)
Bulletin 8697 Page 4
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