Brochure

3-Way Mixing and Diverting Globe Valves, Screwed End (15 to 80 mm) with
Pneumatic Actuators
F-27414-1 © Copyright 2006 TAC. All Rights Reserved. 147
TABLE 2. 15 to 50mm Valves, select
Actuator having sufficient close-off for the
application. Select and
Positive Positioner if required.
Effective Area
39 cm
2
71 cm
2
Valve Linkage
AV-7400 AV-401
Positive Positioner
AK-42309-500 AK-42309-500
Actuator
MK-2690 MK-4601 MK-4611 MK-4621
Spring Range (kPa)
21 to 48 34 to 69 55 to 90 21 to 41 34 to 69 69 to 90
ACTUATOR CLOSE-OFF PRESSURE RATING kPa
a b c
a
Close-off ratings for mixing valves: (SU = “A”, SD = “B” port). “A” port (SU) ratings equal pressure at port “A” minus pressure at port “B”. “B” port (SD) ratings equal pressure at
port “B” minus pressure at port “A”. Close-off ratings in the table are true only when the indicated supply air pressure is applied to the actuator. A change in air pressure at the
actuator alters the actual close-off pressure.
b
Close-off pressure ratings describe only the differential pressure which the actuator can close-off to standards with adequate seating force. Consult valve body specifications for
the limitations.
c
Mixing valves are not to be used in diverting applications. Diverting valves may be used in mixing application with minor affects on flow.
Supply Air Pressure (kPa)
103/
138
103 138
103/
138
103 138
103/
138
103 138
103/
138
103 138
103/
138
103 138
103/
138
103 138
Stem Position
d
d
SU — stem up; SD — stem down. Refer to Table 5 for flow pattern, port designations, and normal position.
SU SD SD SU SD SD SU SD SD SU SD SD SU SD SD SU SD SD
Valve Body P Code
Size
mm (R
p
)
VB-7315-0-4-P
-2, -4 15 (1/2) — — — 340 410 1380 680 — 620 200 1720 1720 680 1030 1720 1720 240 1370
-6 20 (3/4) — — — 200 270 680 410 — 410 130 1240 1580 480 550 1240 1100 100 820
-8 25 (1) — — — 60 100 340 200 — 170 34 620 1060 200 270 680 410 34 440
-9 32 (1-1/4) — — — — 50 200 100 — 100 — 410 680 100 170 410 270 — 270
-10 40 (1-1/2) — ————13068—62———68100270240—170
-11 50 (2) — ————68———————34130100—68
VB-7325-0-4-P
-4 15 (1/2) —
1720 1720 1720 1720 1720 1720 1720 1720 1720 1720 1720 1720 1720 1720 1720 1720 1720
-6 20 (3/4) —
-8 25 (1) —
-9 32 (1-1/4) —
-10 40 (1-1/2) —
-11 50 (2) —
Valve
Linkage