Control valves
Pneumatic actuators
How to use the sizing data:
The following tables supply guidance as to the sizing of the TN2000 when it is used on the SPIRA-TROL series control valves.
There are three applications:
-
Unbalanced flow under applications
-
Unbalanced flow over applications
-
Balanced applications
Two conditions are illustrated in tabular form in each of the applications:
Class IV shut-off - Providing shut-off of the valve to the requirements of
EN 60534-4 (IEC 60534-4) Class IV.
Class VI shut-off - Providing shut-off of the valve to the requirements of
EN 60534-4 (IEC 60534-4) Class VI.
Class V shut-off - Providing shut-off of the valve to the requirements of
EN 60534-4 (IEC 60534-4) Class V.
To select a suitable actuator:
-
Identify the column containing the valve and gland material selected.
-
Identify the maximum operating pressure condition, including any transient pressures likely to occur, within the selected column.
-
Read back to the left hand side of the table to identify the suitable actuator for the application.
For conditions outside of those illustrated please contact Spirax Sarco.
Note: With exception to the TN2277SE, the values in the following tables are based on the air pressure indicated below the product
nomenclature of the specific unit. In the event of air failure you will require an air pressurised tank to position the valve.
TN2277SE
Valve maximum differential pressure
DN125
DN150
DN200
DN300 full
DN250
DN300 reduced
Flow
Unbalanced
Metal seated (T, W, S) Class IV
Metal seated (T, W, S) Class V
Under Soft seated (G, K) Class VI
Soft seated (P) Class VI
All seated (T, W, S, P, K, G) Class IV
4.6 4.2 2.1 1.9
3.0 2.6 0.8 0.6
10.8 10.4 7.3 7.0 4.1
3.9
1.5 1.4
10.7 10.3 7.1 6.9 4.0
3.8
1.4
1.4
Balanced 87.0 83.0 72.0 69.0 40.0
38.0
20.0 19.0
Unbalanced
Over
All seated (T, W, S, P, K, G) Class IV, V, VI
Metal seated (T, W, S) Class IV
Soft seated (G, K) Class IV
Soft seated (P) Class IV
13.2 12.8 8.9 8.6 5.0
4.9
1.8
1.8
Balanced
26.0 22.0 14.0 11.0
68.0 64.0 57.0 53.0 31.0
29.0
15.0
14.0
67.0 63.0 56.0 52.0 30.0
28.0
14.0
14.0
TN2277SR
with 4 bar air supply
Valve maximum differential pressure
DN125
DN150
DN200
DN300 full
DN250
DN300 reduced
Flow
Unbalanced
Metal seated (T, W, S) Class IV
Metal seated (T, W, S) Class V
Under Soft seated (G, K) Class VI
Soft seated (P) Class VI
All seated (T, W, S, P, K, G) Class IV
7.0 6.0
3.0 3.0 1.0
1.0
5.0 5.0
2.0
2.0
13.0 12.0
8.0
8.0 5.0
4.0
1.0 1.0
13.0 12.0
8.0 8.0 4.0
4.0 1.0 1.0
Balanced 117.0 114.0
98.0 95.0 54.0
52.0 27.0 26.0
Unbalanced
Over
All seated (T, W, S, P, K, G) Class IV, V, VI
Metal seated (T, W, S) Class IV
Soft seated (G, K) Class IV
Soft seated (P) Class IV
13.2 12.8
8.9 8.6 5.0
4.9 1.8 1.8
Balanced
44.0 40.0
28.0
25.0 8.0
6.0
86.0 82.0
71.0 68.0 39.0
38.0 20.0 19.0
85.0 81.0
70.0
67.0 38.0
37.0
19.0 18.0
TN2000 Series Pneumatic Piston Actuators
TI-P327-01 CH Issue 4
for DN125 to DN300 SPIRA-TROL Series Control Valves
Page 3 of 7
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