Reduced pressure principal (RPZ) backflow preventer definition

Reduced pressure principal (RPZ) backflow preventer means a device composed of two tightly closing shut-off valves surrounding two independently acting pressure reducing check valves that, in turn, surround an automatic pressure differential relief valve, and four test cocks, one upstream of the five valves and one between each of the four check and shut- off valves. The check valves effectively divide the structure into three chambers; pressure is reduced in each downstream chamber allowing the pressure differential relief valve to vent the center chamber to atmosphere should either or both check valves malfunction.

Related to Reduced pressure principal (RPZ) backflow preventer

  • Generator Forced Outage means an immediate reduction in output or capacity or removal from service, in whole or in part, of a generating unit by reason of an Emergency or threatened Emergency, unanticipated failure, or other cause beyond the control of the owner or operator of the facility, as specified in the relevant portions of the PJM Manuals. A reduction in output or removal from service of a generating unit in response to changes in market conditions shall not constitute a Generator Forced Outage.

  • Maximum Concentration Level Assessment means the Maximum Concentration Level Assessment for the purposes of a Basic Comprehensive Certificate of Approval, described in the Basic Comprehensive User Guide, prepared by a Toxicologist using currently available toxicological information, that demonstrates that the concentration at any Point of Impingement for a Compound of Concern that does not have a Ministry Point of Impingement Limit is not likely to cause an adverse effect as defined by the EPA. The concentration at Point of Impingement for a Compound of Concern must be calculated in accordance with O. Reg. 419/05.

  • Generator to Load Distribution Factor or “GLDF” shall mean a generator’s impact on a Flowgate while serving load in that generator’s Balancing Authority Area.

  • Generator Planned Outage means the scheduled removal from service, in whole or in part, of a generating unit for inspection, maintenance or repair with the approval of the Office of the Interconnection in accordance with the PJM Manuals.

  • Backflow preventer means a device or means to prevent backflow.

  • Single Phase Aerosol Air Freshener means an aerosol air freshener with the liquid contents in a single homogeneous phase and which does not require that the product container be shaken before use.

  • Class C Par Value Test means the test which will be satisfied as of any Measurement Date if, on such Measurement Date, the Class C Par Value Ratio is at least equal to the percentage specified in the definition of "Coverage Test".

  • PRINCIPAL TEST The CONTRACTOR rather than COUNTY has the right to control the manner and means of accomplishing the result contracted for.

  • Reid vapor pressure means the vapor pressure of crude oil or other volatile petroleum products at 100 degrees Fahrenheit as determined by the latest edition of ASTM D6377 (RVPE): Standard Test Method for Determination of Vapor Pressure of Crude Oil.

  • Class D Par Value Test means the test which will be satisfied as of any Measurement Date if, on such Measurement Date, the Class D Par Value Ratio is at least equal to the percentage specified in the definition of "Coverage Test".

  • Seasonal high water table means the highest zone of soil or rock that is seasonally or permanently saturated by a perched or shallow water table. A planar surface, below which all pores in rock or soil (whether primary or secondary) that is seasonally or permanently saturated.

  • Wind Turbine means a mechanical/electrical system that converts the kinetic energy of blowing wind into mechanical or electric power.

  • Rated Voltage means the manufacturer’s design voltage at which the transmission system is designed to operate or such lower voltage at which the line is charged, for the time being, in consultation with Transmission System Users;

  • Operating pressure means the pressure at which the parts of an irrigation system are designed by the manufacturer to operate.

  • Maximum residual disinfectant level or “MRDL” means a level of a disinfectant added for water treatment that may not be exceeded at the consumer’s tap without an unacceptable possibility of adverse health effects.

  • RDDS test Means one query sent to a particular “IP address” of one of the servers of one of the RDDS services. Queries shall be about existing objects in the Registry System and the responses must contain the corresponding information otherwise the query will be considered unanswered. Queries with an RTT 5 times higher than the corresponding SLR will be considered as unanswered. The possible results to an RDDS test are: a number in milliseconds corresponding to the RTT or undefined/unanswered.

  • Operational Acceptance Tests means the tests specified in the Technical Requirements and Agreed Project Plan to be carried out to ascertain whether the System, or a specified Sub system, is able to attain the functional and performance requirements specified in the Technical Requirements and Agreed Project Plan, in accordance with the provisions of GCC Clause 27.2 (Operational Acceptance Test).

  • AMPS Basic Maintenance Amount, as of any Valuation Date, means the dollar amount equal to (i) the sum of (A) the product of the number of shares of AMPS and Other AMPS Outstanding on such Valuation Date multiplied by the sum of (a) $25,000 and (b) any applicable redemption premium attributable to the designation of a Premium Call Period; (B) the aggregate amount of cash dividends (whether or not earned or declared) that will have accumulated for each share of AMPS and Other AMPS Outstanding, in each case, to (but not including) the end of the current Dividend Period that follows such Valuation Date in the event the then current Dividend Period will end within 49 calendar days of such Valuation Date or

  • Plant Test Date or "PTD" means the date acceptance testing is performed with CLEC. "Point of Interface", "Point of Interconnection," or "POI" is a demarcation between the networks of two (2) LECs (including a LEC and CLEC). The POI is that point where the exchange of traffic takes place.

  • voltage ride through as used herein shall mean the ability of a Small Generating Facility to stay connected to and synchronized with the system or equipment of the Transmission Owner and any Affected Systems during system disturbances within a range of under-voltage and over-voltage conditions, in accordance with Good Utility Practice and consistent with any standards and guidelines that are applied to other generating facilities in the Balancing Authority Area on a comparable basis.

  • Forced Outage means any unplanned reduction or suspension of the electrical output from the Project or unavailability of the Project in whole or in part from a Unit in response to a mechanical, electrical, or hydraulic control system trip or operator-initiated trip in response to an alarm or equipment malfunction and any other unavailability of a Unit for operation, in whole or in part, for maintenance or repair that is not a Planned Outage and not the result of Force Majeure.

  • Categorical pretreatment standard or "categorical standard" means any regulation containing pollutant discharge limits promulgated by the environmental protection agency in accordance with sections 307(b) and (c) of the Act (33 U.S.C. section 1317) that apply to a specific category of users and that appear in 40 CFR chapter I, subchapter N, parts 405 through 471.

  • 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.

  • Peak flow rate means the maximum instantaneous flow from a given storm condition at a particular location.

  • low voltage means the set of nominal voltage levels that are used for the distribution of electricity and whose upper limit is generally accepted to be an a.c. voltage of 1000V ( or a d.c. voltage of 1500 V). [SANS 1019]

  • Required Reserve Factor Floor means, for any month, the sum (expressed as a percentage) of (i) 19.55% plus (ii) the product of the Adjusted Dilution Ratio and the Dilution Horizon Ratio, in each case, as of the immediately preceding Cut-Off Date.