ASSE 1047

Performance Requirements for Reduced Pressure Detector Fire Protection Backflow Prevention Assemblies

active, Most Current
Buy Now
Organization: ASSE
Publication Date: 1 August 2011
Status: active
Page Count: 40
scope:

Description

This standard applies to the two types of assemblies, identified as:

(a) Reduced Pressure Detector Assembly (RPDA); and

(b) Reduced Pressure Detector Assembly Type II (RPDA-II).

The RPDA and RPDA-II assemblies consist of two (2) independently acting check valves, internally force loaded to a normally closed position, and separated by an intermediate chamber (or zone) in which there is a hydraulically operated relief means for venting to atmosphere, internally force loaded to a normally open position. These assemblies are designed to operate under continuous pressure conditions. The assembly shall include two (2) properly located, tightly closing shut-off valves per Section 1.3.2.7 and properly located test cocks per Section 1.3.2.5. The assemblies also include a bypass line which provides a visual or audible indication of system leakage or unauthorized use of water.

This standard also applies to Manifold Reduced Pressure Detector Assemblies consisting of two (2) or more complete RPDA or RPDA-II assemblies in parallel. The assemblies do not need to be of the same pipe size. The manifold size shall be identified by the single inlet and outlet of the manifold RPDA or RPDA-II assembly. Manifold Reduced Pressure Principle Backflow Assemblies shall include line-sized shut-off valves on each inlet and outlet of the assemblies making up the manifold.

Document History

ASSE 1047
August 1, 2011
Performance Requirements for Reduced Pressure Detector Fire Protection Backflow Prevention Assemblies
Description This standard applies to the two types of assemblies, identified as: (a) Reduced Pressure Detector Assembly (RPDA); and (b) Reduced Pressure Detector Assembly Type II (RPDA-II). The...
July 24, 2009
Performance Requirements for Reduced Pressure Detector Fire Protection Backflow Prevention Assemblies
Description The purpose of a Reduced Pressure Detector Fire Protection Backflow Prevention Assembly (herein referred to as the "assembly") is to keep contaminated water from fire protection systems...
January 1, 2005
Performance Requirements for Reduced Pressure Detector Fire Protection Backflow Prevention Assemblies
A description is not available for this item.
September 20, 1999
Performance Requirements for Reduced Pressure Detector Fire Protection Backflow Prevention Assemblies
A description is not available for this item.
January 1, 1993
Performance Requirements for Reduced Pressure Detector Backflow Preventer
A description is not available for this item.

References

Advertisement