Johnson Controls MP8 20 Series Manual page 12

Close-off Pressures [kPa] with VBD Valves
K
vs
DN Actuator
Coefficient
VBD PDTC Two-Way Valves
15 4.0
15 0.6 – 1.0
MP8x2
15 1.6 – 2.5
25 6.3 / 10
40 16 / 25
VBD Mixing Valves
15 4.0
15 0.6 – 1.0
MP8x2
15 1.6 – 2.5
25 6.3 / 10
40 16 / 25
DA Actuator
Spring-return up
PDTO Valve
Mixing: Inlet 1 – Outlet
Diverting: Inlet – Outlet 2 (Bypass)
RA Actuator
Spring-return down
PDTC Valve
Mixing: Inlet 2 – Outlet
Diverting: Inlet – Outlet 2 (2-way)
Spring Range
[kPa]
20 - 50 60 - 90
Spring ID No.
23 63
1340 2500
2430 2500
2500 2500
540 1850
60 570
- 2500
370 2500
2500 2500
- 900
- 130
DA Actuator
Air Pressure closes
PDTO Valve
Mixing: Inlet 1 – Outlet
Diverting: Inlet – Outlet 2 (Bypass)
RA Actuator
Air Pressure closes
PDTC Valve
Mixing: Inlet 2 – Outlet
Diverting: Inlet – Outlet 2 (2-way)
120 kPa 140 kPa
Spring Range Spring Range
[kPa]
20 - 50 60 - 90 20 - 50
Spring ID No. Spring ID No.
23 63 23
2500 2250 2500
2500 2500 2500
2500 2500 2500
2170 870 2500
700 190 950
2500 1150 2500
2500 2500 2500
2500 2500 2500
1330 - 2150
270 - 550
160 kPa
Spring Range
[kPa] [kPa]
60 - 90 20 - 50 60 - 90
Spring ID No.
63 23
2500 2500 2500
2500 2500 2500
2500 2500 2500
1520 2500 2170
440 1210
2500 2500 2500
2500 2500 2500
2500 2500 2500
480 2500 1330
- 830
63
700
270