Selection Guide
Table Of Contents
- 1. Determine the manufacturer, part number, size, and stroke of the competitive valve body.
- 2. Determine the type of actuator required (e.g. pneumatic, electric two-position, electric floating, electric proportional), th...
- 3. Consult the appropriate section of this selection guide to determine the required AV-8xx kit number, compatible TAC actuator part number, and TAC actuator linkage (if needed).
- Competitive Globe Valve Adapters
- AV-800 Series Application Overview
- 1. TAC actuator and adapter dimensions may need to be checked to assure proper clearances are maintained.
- 2. The replacement actuator and adapter listed represent what TAC believes are an equivalent. Actuators do not necessarily have ...
- 3. TAC assumes no responsibility for guaranteeing the acceptability of any suggested replacements. The suggestions contained herein should only be used as a guide.
- 4. Consult the valve manufacturer if the system pressures or temperatures are being changed to assure proper performance.
- 5. Pneumatic actuator close-offs are based on 20 psig to the actuator diaphragm
- 6. All specified close-offs are nominal, and can vary based on the age of the valve, tightness of the stem packing, and variations in stem drag
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AV-817 — Actuator, Linkage, and Close-Off Information for 1” through 2” Robertshaw
5/8” Stroke Valves (TAC Pneumatic and DuraDrive Spring Return Actuators)
AV-817 — Actuator, Linkage, and Close-Off Information for 1” through 2” Robertshaw
5/8” Stroke Valves (TAC Forta Non-Spring Return Actuators)
Robertshaw
Valve Models
Actuator MK-6801 MK-6811 MK-6821 Mx51-720x
Additional Linkage AV-430 Included
a
a
Linkage included in actuator.
Valve Stroke 5/8” 5/8” 5/8” 5/8”
Spring Range 3-8 psig 5-10 psig 8-13 psig —
V6600
V6700
V6800
1” Normally Open 250
b
b
20 psig supply air pressure
250
b
250
b
200
1-1/4” Normally Open 250
b
250
b
250
b
150
1-1/2” Normally Open 250
b
230
b
160
b
100
2” Normally Open 160
b
120
b
90
b
65
1” Normally Closed 80 160 250 200
1-1/4” Normally Closed 60 120 200 150
1-1/2” Normally Closed 40 80 170 100
2” Normally Closed 20 50 90 65
Robertshaw
Valve Models
Actuator M400A (-VB) M800A (-VB) M1500A (-VB)
Linkage —
a
a
No separate linkage required.
Valve Stroke 5/8”
V6600
V6700
V6800
1” 92 207
Not
Recommended
1-1/4” 56 130
1-1/2” 37 88 177
2” 19 48 98