2410-0009 Q (m³/h) 35 30 25 20 15 10 5 CPMO-2, Kv 2/15 1 CPMI-2, Kv 2/15 P (kPa) 2410-0008 A B 600 A B 500 2 C 400 D 300 E 200 F 100 C D Stroke (%) E F 0 10 15 20 30 40 50 A = p 500 (kPa) B = p 400 (kPa) C = p 300 (kPa) D = p 200 (kPa) Figure 9. CPM-2, Kv 2/15 60 70 80 90 E = p 100 (kPa) F = p 50 (kPa) 0 100 0 10 20 30 Stroke (%) A = 15% B = 30% 40 50 60 70 80 90 100 110 120 130 140 150 C = 50% D = 65% E = 85% F = 100% Q m³/h) Figure 10. CPM-I-D, Kv 60 Example 1: Pressure drop Δ p = 200 kPa Flow Q = 8 m 3 /h Select: CPM-2, Kv 23 which at working point will be 48% open. Example 2: CPMI-2: Pressure drop Δ p = 300 kPa Flow Q = 1 m 3 /h Select: CPMI-2, Kv 2/15 which at working point will be approx. 35% open equal to about 50% of the regulating area. Example of using the diagram: 1. Pressure drop Δ p = 300 kPa 2. Flow = 50m 3 /h The intersection is on the 50% curve. Note! Always try to get as close as possible to the 50% open curve. If the CPM-I-D60 is too big select from the CPMI-2 curves. 192
Download PDF file
Table of contents
Build your own flipbook
Cookie policy