Brochure

F-27855-10126
2-Way Globe Valve Assemblies with Pneumatic Spring Return Actuators
Pneumatic Spring Return
2-Way Globe Valve Assemblies
(shown with Positive Positioner)
MK-6811
b
MK-6911
b
Actuator Models (Actuator Codes)
MK- 6 811 (602) MK-6911 (652)
Linkage Kit Part Number
AV-497 AV-497
Spring Range, psig (kPa)
5…10 (34 to 69)
a
5…10 (34 to 69)
a
Close-off Pressure (psi)
125
Valve Assembly
Part Number
b
P
Code
Valve Size
in.
Cv
b
kvs
b
Maximum Allowable Operating Differential
Pressure
d
, psi (kPa)
VK-8213- 602-5 -12
VK-8223-602-5-12
VK4-8213-602-5-12
VK4-8223-602-5-12
12 2½ 56 48
35 (240) -
VK- 8213 -602-5-13
VK-8223-602-5-13
VK4-8213-602-5-13
VK4-8223-602-5-13
13 3 85 74
VK-8213- 602-5 -14
VK-8223-602-5-14
VK4-8213-602-5-14
VK4-8223-602-5-14
14 4 145 125
VK-8213- 602-5 -15
VK-8223-602-5-15
VK4-8213-602-5-15
VK4-8223-602-5-15
15 5 240 208
VK4-8213-652-5-16
VK4-8223-652-5-16
16 6 370 320 - 35 (240)
a - Spring range field adjustable with positive positioner.
b - AK-42309-500 positive positioner optional for 2½”…5” valve, required for 6” valve. Supplied as standard on VK4 factory
valve assemblies. See Pg. 98, Assembly Ordering VB-8/9000 for the relevant part series to determine a specific part number.
c -
C = gpm
∆P
v
(where ∆P is measured in psi) kvs = Cv / 1.156
K = m /h
∆
P
vs
3
(where ∆P is measured in bar; 1 bar = 100 kPa).
d - Maximum allowable differential across the valve in any open position. Less than 20 psi recommended for quieter service.
Consult close-off pressure ratings.

Note: Choose a valve assembly with a maximum operating differential pressure capability sufficient for the application. Consult the table below
for close-off pressure ratings. Not all actuator and valve body combinations are offered as factory assemblies.
VB-82x3 2-Way Valves with
Pneumatic SR Actuators
6. VB-8/9000 Valve and
Actuator Assemblies
6. VB-8/9000 Valve and
Actuator Assemblies