The purpose of this standard is to define the minimum requirements for pilot-operated control valves, including sizing considerations, design verification, testing, delivery, handling, and storage.<\/p>\n
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| 7<\/td>\n | Foreword I.\tIntroduction. I.A.\tBackground.\u2003Pilot-operated control valves have been in use since the early 1900s in pipelines that carry liquids. Manufacturers of pilot-operated control valves have developed tight-closing rubber-seated and metal-seated products for pipeline use in I.B.\tHistory.\u2003The need for a standard addressing pilot-operated control valves was recognized by the American Water Works Association (AWWA) in November 2001. A committee was appointed for the task of standardization; at the first inaugural meeting in Jun I.C.\tAcceptance.\u2003In May 1985, the US Environmental Protection Agency (USEPA) entered into a cooperative agreement with a consortium led by NSF International (NSF) to develop voluntary third-party consensus standards and a certification program for direct <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | II.\tSpecial Issues.\u2003Conditions under which the pilot-operated control valve is to be operated must be evaluated carefully by the purchaser. This evaluation must include determination of the hydraulic characteristics of the system in which the valve will b II.A.\tChlorine and Chloramine Degradation of Elastomers.\u2003The selection of materials is critical for water service and distribution piping in locations where there is a possibility that elastomers will be in contact with chlorine or chloramines. Documented III.\tUse of This Standard.\u2003It is the responsibility of the user of an AWWA standard to determine that the products described in that standard are suitable for use in the particular application being considered. III.A.\tPurchaser Options and Alternatives.\u2003The following information should be provided by the purchaser. <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | III.B.\tLaying Length.\u2003Pilot-operated control valves do not have uniform laying lengths. Interchangeability between various manufacturers may not be possible without modification to the existing piping system. The purchaser is cautioned to obtain this info III.C.\tPerformance Test.\u2003This standard does not require the manufacturer to conduct the performance test on a fully assembled valve. Sec. 5.2 allows the manufacturer to conduct the tests separately on the main valve and the related pilots. If the purchase III.D.\tValve Test Media.\u2003The purchaser should review Sec. 5.2.1 of this standard and inform the supplier of the preferred valve test media. The standard allows factory testing of valves with air or water. III.E.\tModification to Standard.\u2003Any modification of the provisions, definitions, or terminology in this standard must be provided by the purchaser. IV.\tMajor Revisions.\u2003Major changes made to the standard in this revision include the following: V.\tComments.\u2003If you have any comments or questions about this standard, please call AWWA Engineering and Technical Services at 303.794.7711; write to the department at 6666 West Quincy Avenue, Denver, CO 80235-3098; or email at standards@awwa.org. <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | AWWA Standard SECTION 1:\u2002GENERAL Sec.\u20021.1\tScope <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | Sec.\u20021.2\tPurpose Sec.\u20021.3\tApplication SECTION 2:\u2002REFERENCES <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | SECTION 3:\u2002DEFINITIONS <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | SECTION 4:\u2002REQUIREMENTS Sec.\u20024.1\tData Provided by Manufacturer Sec.\u20024.2\tMaterials <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Sec.\u20024.3\tGeneral Design <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Sec.\u20024.4\tWorkmanship and Painting <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Sec.\u20024.5\tPermeation SECTION 5:\u2002VERIFICATION Sec.\u20025.1\tInspection Sec.\u20025.2\tTesting <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Sec.\u20025.3\tNotice of Nonconformance SECTION 6:\u2002DELIVERY Sec.\u20026.1\tMarkings <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | Sec.\u20026.2\tShipping Sec.\u20026.3\tAffidavit of Compliance SECTION 7:\u2002SIZING AND APPLICATION Sec.\u20027.1\tValve Basics <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | Sec.\u20027.2\tControl Functions <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Sec.\u20027.3\tPressure-Reducing Function <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | Sec.\u20027.4\tPressure-Relief\/Sustaining Function <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | Sec.\u20027.5\tSolenoid Control Function Sec.\u20027.6\tPump Control Function <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Sec.\u20027.7\tAltitude Control Function <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Sec.\u20027.8\tRate-of-Flow Control Function <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | Appendix A Installation, Operation, and Maintenance Pilot-Operated Control Valves <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" AWWA C530-22 Pilot-Operated Control Valves<\/b><\/p>\n |