AWWA Comment Period on ANSI/AWWA C504-15, Rubber-Seated Butterfly Valves

AWWA  solicits public comments on all proposed new AWWA Standards, and on all proposed revisions, reaffirmations, or withdrawals of existing AWWA Standards.  The referenced standards project is being considered for approval and the publication of this notice begins AWWA’s 30-day public comment period.  An electronic public review copy of the proposed standard can be purchased for review during the comment period for $20 each.  Comments must be submitted in writing to the AWWA contact listed below no later than the last day of the comment period specified herein. Such comments shall be specific to the section(s) of the standard under review and include sufficient detail so as to enable the reader to understand the commenter's position, concerns and suggested alternative language, if appropriate. The AWWA Comment Period is now closed. Review copies are no longer available.

 

Send comments to:

Tim McCandless

303.347.6285 phone

303.795.7603 fax

 

The review copy will be edited for publication and may also be revised as appropriate based on any comments received during the public comment period. Therefore, this copy is not suitable for continued utilization and is intended only for comment purposes.

 

Final publication of the standard may take several months. When it is available, a notice will be published in the official notice section of Journal – American Water Works Association. The standard becomes an effective AWWA standard on the first day of the month following such publication in Journal – American Water Works Association.

 

Scope

This standard establishes minimum requirements for rubber-seated butterfly valves, 3 in. (75 mm) through 72 in. (1,800 mm) in diameter, with various body and end types, for fresh and reclaimed water having a pH range from 6–12 and a temperature range from 33°–125°F (0.6°–52°C). This standard covers rubber-seated butterfly valves suitable for a maximum steady-state fluid working pressure of 250 psig (1,723 kPa), a maximum steady-state differential pressure of 250 psi (1,723 kPa), and a maximum full open fluid velocity of 16 ft/sec (4.9 m/sec) based on nominal valve size.

1.1.1 Body types, classes, and sizes. Valves described in this standard are provided in four body types and in classes as follows:

1.1.1.1 Wafer valves. Class 150B, in sizes 3–20 in. (75–500 mm).

1.1.1.2 Short-body and long-body flanged valves. Class 25A, Class 25B, Class 75A, Class 75B, Class 150A, and Class 150B, in sizes 3–72 in. (75–1,800 mm), and Class 250B in sizes 3–48 in. (75–1,200 mm).

1.1.1.3 Mechanical-joint-end valves. Class 150B and Class 250B, in sizes 3–24 in. (75–600 mm), and Class 25A, Class 25B, Class 75A, Class 75B, Class 150A, Class 150B, and Class 250B, in sizes 30–48 in. (750–1,200 mm).

1.1.2 Definition of classification. In each case, the numeric designation represents the pressure rating (the maximum steady-state fluid working pressure, in pounds per square inch gauge) and also the maximum steady-state differential pressure, in pounds per square inch, for which the valve is designed.

1.1.2.1 A and B designations. The designations A and B define the flow-rate capabilities with the valve in the fully open position. A valves are rated for a maximum velocity of 8 ft/sec (2.4 m/sec), and B valves are rated for a maximum velocity of 16 ft/sec (4.9 m/sec) in the piping section upstream of the valve.

 

Major Revisions

The major revisions made to the standard in this edition include the following:

1. Actuator stroke times, Sec 4.2.8.4.3 and 4.2.8.5.5

2. Actuator design and sizing margins, Sec 4.2.8.1 and Sec 4.2.8.2