Reduced Pressure Principle Device definition

Reduced Pressure Principle Device. (RP) means a backflow prevention device consisting of an assembly of two independently operating approved check valves with an automatically operating differential relief valve between the two check valves, tightly closing shut-off valves on either side of the check valves, plus properly located test cocks for the testing of the check and relief valves. The entire assembly shall meet the design and performance specifications and approval of a recognized and approved testing agency for backflow prevention assemblies. The device shall operate to maintain the pressure in the zone between the two check valves at a level less than the pressure of the inlet device. At cessation of normal flow, the pressure between the two check valves shall be less than the pressure at the inlet of the device. In case of leakage of either of the check valves, the differential relief valve shall operate to maintain the reduced pressure in the zone between the check valves by discharging to the atmosphere. When the inlet pressure is two pounds per square inch or less, the relief valve shall open to the atmosphere. To be approved, these devices must be readily accessible for inline maintenance and testing and be installed in a location where no part
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Reduced Pressure Principle Device means an assembly of two independently acting approved check valves together with a hydraulically operating, mechanically independent pressure relief valve located between the check valves and at the same time below the first check valve. The unit shall include properly located test cocks and tightly closing shut-off valves at each end of the assembly. The assembly shall operate to maintain the pressure on the public water supply side of the device. At cessation of normal flow the pressure between the two check valves shall be less than the pressure on the public water supply side of the device.
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Reduced Pressure Principle Device means an assembly of two independently acting approved check valves together with a hydraulically operating, mechanically in- dependent pressure relief valve located be- tween the check valves and at the same time below the first check valve. The unit shall include properly located test cocks and tight- ly closing shutoff valves at each end of the assembly. The assembly shall operate to maintain the pressure in the zone between the two check valves at an acceptable level
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Examples of Reduced Pressure Principle Device in a sentence

  • Reduced Pressure Principle Device - An assembly of two independently operating check valves with an automatically operating differential relief valve between the two check valves, tightly closing shutoff valves on either side of the check valves, and properly located test cocks for the routine testing of the device.

  • Reduced Pressure Principle Device is required for: All non-residential applications, including all non-residential fire protection systems.

  • If installed for janitorial closets or kitchen they must have a Reduced Pressure Principle Device backflow device.

  • Requirements Abbreviations - Tables 1 uses the given abbreviations for these types of devices: Air Gap Separation = AG; Reduced Pressure Principle Device = RP; Double Check Valve Assembly = DC; Double Check Detector Assembly = DCDA; and Reduced Pressure Principle Detector Assembly = RPDA.

  • Containment or isolation devices used within the consumer's water supply system that are capable of being tested and repaired in-line include the Reduced Pressure Principle Device (RPZ), Double Gate—Double Check Valve Assembly (DG—DC) & Pressure Vacuum Breaker (PVB).

  • Associate each of the tree’s terminal node corresponding to a database category label with the corresponding value in the utterance (e.g.,CITY NAME becomes New York).The output of this algorithm is a semantic tree of the utterance, with terminal concepts associated with database values.

  • Reduced Pressure Principle Device: An assembly of two independently operating approved check valves with an automatically operating differential relief valve between two check valves, plus properly located test cocks for the testing of the check and relief valves.

  • After evaluating the model and making any necessary input changes or adjustments, the model is run for a future year, which corresponds to the appropriate attainment year for the area or to the future year modeled for regional haze planning purposes.

  • A Reduced Pressure Principle Device (RPPD) backflow prevention device shall be installed for meter protection.

  • All services for non-residential developments must be equipped with approved backflow prevention devices; a double detector check assembly for fire lines and a Reduced Pressure Principle Device (RPPD) backflow device for non-residential domestic water service.


More Definitions of Reduced Pressure Principle Device

Reduced Pressure Principle Device means an assembly containing two independently acting approved check valves together with a hydraulically-operated, mechanically independent pressure differential relief valve located between the check valves and at the same time below the first check valve. The device shall include properly located test cocks and tightly closing
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Reduced Pressure Principle Device means an assembly consisting of two (2) independently operating check valves with an automatically operating differential relief valve located between the two (2) check valves, tightly closing shut-off valves on each side of the check valves plus properly located test cocks for the testing of the check valves and the relief valve.
Sample 1
Reduced Pressure Principle Device means an assembly of two independently operating approved check valves with an automatically operating differential relief valve between the two check valves, tightly closing shutoff valves on either side of the check valves, plus properly located test cocks for the testing of the check and relief valves. The entire assembly shall meet the design and performance specifications and approval of a recognized and City-approved testing agency for backflow-prevention assemblies. The device shall operate to maintain the pressure in the zone between the two check valves at a level less than the pressure on the public water supply side of the device. These devices must be readily accessible for in-line maintenance and testing, and be installed in a location where no part of the device will be submerged.
Sample 1
Reduced Pressure Principle Device means an assembly of two independently operating approved check valves with an automatically operating differential relief valve between the two check valves, tightly closing shutoff valves on either side of the check
Sample 1

Related to Reduced Pressure Principle Device

  • True vapor pressure means the equilibrium partial pressure exerted by a petroleum liquid as determined in accordance with methods described in American Petroleum Institute (API) Bulletin 2517, Evaporation Loss from External Floating Roof Tanks, 1980. The API procedure may not be applicable to some high viscosity or high pour crudes. Available estimates of true vapor pressure may be used in special cases such as these.

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