Brochure
3-Way Mixing and Sequencing Globe Valves, Flared (5/8 in. O.D.) with
Electric, Hydraulic, and Pneumatic Actuators
72
© Copyright 2006 TAC. All Rights Reserved. F-27414-1
TABLE 2A. Pneumatic Input, select
Actuator Type or Actuator Code (XXX)
series with correct Input Signal having
sufficient close-off for the application. If
selecting Component Parts, select
and Positive Positioner if
required.
Input Signal
Pneumatic
Valve Linkage
AV-7400 AV-401
Positive Positioner
AK-42309-500 AK-42309-500
Actuator Code (XXX)
201 202 203 301 302 303 313
Actuator Type
MK-2690 MK-4601 MK-4611 MK-4621 MK-4621-422
Spring Range (psig)
3 to 7 5 to 10 8 to 13 3 to 6 5 to 10 10 to 13 10 to 11.25
ACTUATOR CLOSE-OFF PRESSURE RATING (psi)
a
b
Supply Air Pressure (psig)
15/20 15 20 15/20 15 20 15/20 15 20 15/20 15 20 15/20 15 20 15/20 15 20 15/20 15 20
Stem Position
c
SU SD SD SU SD SD SU SU SD SU SD SD SU SD SD SU SD SD SU SD SD
NP
d
Valve Assembly Valve Body P Code
Size
in.
—————————————————— ———
VA-3249-XXX-5-4
VF-3249-XXX-5-4
VK-3249-XXX-5-4
VS-3249-XXX-5-4
VB-324-0-5-4
-1, -2, -3
1/2
20 200 250 130 90 250 250 0 165 80 200 200 200 200 200 200 200 200 200 50 200
SU
c
VK-7312-XXX-4-P
VB-7312-0-4-P
-2-4
5/8
5 100 175 60 50 135 95 5 85 35 250 250 130 110 240 250 30 170 — — —
VK-7332-XXX-4-P
VB-7332-0-4-P
-2-3-4 ——————
35
e
—
35
e
——————
35
e
—
35
e
35
e
—
35
e
a
Close-off ratings for mixing valves: (SU = “A” port, 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
SU ⎯ Stem Up (Flow “B” to “AB”); SD ⎯ Stem Down (Flow “A” to “AB”); Normal Position Step Up (Flow “B” to “AB”).
d
NP = Normal Position.
e
VK-7332-203-4-X is used as the inlet valve and VK-7332-313-4-X is used as the outlet valve on a four pipe angle coil system. 20 psig signal is required. Neutral valve position
(both parts just close) have 35 psig close-off pressure between “A” or “B” port minus “AB” port for all actuators. (Refer to page 74 for four-pipe details.)
Valve
Linkage