Data Sheet for Product

Technical Bulletin TB255 Flowrite™ 599 Series 1/2-Inch to 2- Inch Valve and Actuator Selection
Document No. 155-772
June 13, 2014
Page 2 Siemens Industry, Inc.
Selection Example
Specification
Select a two-way normally-open valve and pneumatic actuator assembly that will
deliver 20 gpm (5 m
3/
h) chilled water with linear flow characteristic with no more than 5
psi (35 kPa) pressure drop across the fully-open valve. The valve must have standard
packing and a female-to-female (F×F) connection.
The valve shall be operated by a standard 8-inch pneumatic actuator and must close
off tightly against a pump head pressure of 50 psi (300 kPa).
Valve Sizing
Use Figure 1, the water capacity graph, to begin valve sizing.
1. Locate 20 gpm (5 m
3
/h) on the vertical axis to find the required flow.
2. Read across the horizontal axis to find 5 psi (35 kPa), the maximum allowable
pressure drop across the open valve.
3. Select a 1-inch (25 mm), 10 Cv (8.6 Kvs) line size valve, because the point of
intersection falls between the 3/4 inch and 1-inch line sizes.
Actuator Selection
Use Figure 2, the close-off pressure graph, to choose an actuator.
1. Locate the graph for pneumatic actuators for NO valves in the lower right side of
the figure.
2. Locate the bar for 1-inch valves. The gray-shaded bar represents an 8-inch
pneumatic actuator.
3. Notice that the 8-inch pneumatic actuator has the sufficient force to provide tight
close-off (ANSI C IV) against more than 50 psi (300 kPa) differential. For a 1-inch
valve, select an 8-inch, standard pneumatic actuator, with a 20 mm stroke.
Product Number
Selection
Use Table 1, Two-Way, Normally Open (NO), Equal Percentage Valves, Bronze Trim,
Standard Packing. Begin at the left and select the specifications necessary.
1. Select a standard packed valve, with an F×F connection according to the above
specifications.
2. Select the 1-inch line size determined from the sizing example above. The valve
part number is 599-03167.
3. Read across table to the 8-inch Standard Pneumatic actuator.
The actuator part number is 599-01050.
The actuator code number is 277.
4. Read down the column to determine the valve and actuator assembly product
number is 277-03167.
NOTE: The valve and actuator can be ordered separately by using the part
numbers from Steps 2 and 3.
References
Two-Way Valves, 1/2 to 2-inch Bronze Body, ANSI 250 Technical Instructions
(155-184).
Three-Way Valves 1/2 to 2-inch Bronze Body Technical Instructions (155-185).