# B. Knight Natural Gas Services — Pipeline Safety Interpretation - **operation:** document - **citation:** PI-10-0001 - **title:** B. Knight Natural Gas Services — Pipeline Safety Interpretation - **source type:** guidance - **agency:** Pipeline and Hazardous Materials Safety Administration - **status:** guidance - **official:** true - **published on:** 2010-11-18 - **effective on:** Not available - **summary:** PI-10-0001 response to B. Knight Natural Gas Services concerning 192.197. - **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-10-0001.json - **markdown:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-10-0001.md - **app url:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-10-0001 - **source url:** https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretations/Pipeline/2010/PI-10-0001.pdf **body:** <<>> U.S. Department of Transportation 1200 New Jersey Ave, S,E, Washington, D,C, 20590 Pipeline and Hazardous Materials Safety Administration NO'J 1 S 20'0 Mr. Michael H. Kyle B. Knight Natural Gas Services P.O. Box 5702 Midlothian, VA 23112 Dear Mr. Kyle: In a letter to the Pipeline and Hazardous Materials Safety Administration (PHMSA) dated December 14,2009, you requested an interpretation or opinion as to whether two specific installations of gas utilization equipment would meet the intent and requirements of 49 CFR § 192.197. You provided two actual installations. In Installation 1, the value of outlet pressure could exceed 1 psig or 28-in water column (wc), and in Installation 2, the value of outlet pressure could approach 1 psig (26-in wc). You stated your assumption is that the maximum operating inlet pressure allowed for most residential installations is limited to 12 psi (14-in wc) and that pressures in excess of 1 psi (28-in wc) are likely to cause damage to the appliance regulator. First, you asked whether the bolded words in the following two subsections of § 192.197 have the same meaning: in § 192. 197(a)(5), " ... to prevent a pressure that would cause unsafe operation ofany connected andproperly adjusted gas utilization equipment" and in § 192.l97(c)(3),"... set to open so that the pressure ofgas going to the customer does not exceed a maximum safe value." The answer is that they do not have the exact same meaning. The phrase "unsafe operation" in § 192.197(a)(5) addresses both upper and lower pressure limits and means that the connection should regulate pressure so that it is neither so high as to create excessively high pilot light flames nor so low that the pilot light could extinguish and create the possibility of gas accumulation. The phrase "exceed a maximum safe value" in § 192.197( c )(3) addresses only the upper limit or high pressure. Second, you asked what inlet pressure does § 192.197(a)(5) or § 192.197( c )(3) refer to? Regarding the limit for inlet pressure, § 192.197 is a design requirement under Subpart DDesign of Pipeline Components. The design requirements under Subpart D apply to the design ofpipeline system or components to operate under conditions that are known or reasonably foreseeable at the time of installation. Therefore, § 192.197 does not prescribe a specific value as long as the inlet pressure does not cause damage to the appliance's regulator. The Pipeline and Hazardous Materials Safety Administration, Office of Pipeline Safety provides written clarifications of the Regulations (49 CFR Parts 190-199) in the form of interpretation letters, These letters reflect the agency's current application of the regulations to the specific facts presented by the person requesting the clarification, Interpretations do not create legally-enforceable rights or obligations and are provided to help the public understand how to comply with the regulations, <<>> 2 Finally, you asked whether your recommendations in both installations are valid and meet the intent of § 192.197. Again, § 192.197 does not specify a specific value as long as the inlet pressure does not lead to unsafe conditions or cause damage to the gas utilization equipment or associated regulators. I hope that this information is helpful to you. If I can be of further assistance, please contact me at 202-366-4046. Sincerely, ae Director, Office of Standards and Rulemaking The Pipeline and Hazardous Materials Safety Administration, Office of Pipeline Safety provides written clarifications of the Regulations (49 CFR Parts 190-199) in the fonn of interpretation letters. These letters reflect the agency's current application of the regulations to the specific facts presented by the person requesting the clarification. Interpretations do not create legally-enforceable rights or obligations and are provided to help the public understand how to comply with the regulations. <<>> Requester IMr. 'I' Ml~.hall.KyJe~......; .....~............; ...~ ~'.' .........: ~ ....~,..: : ........:,;......Date ReceiVed:'116/2()10;', "" ,' , B, ,:.Knigtlt.NatulaLGa....S . e . r.i.ltJ. a ; ...: ~; ' .~~:. : ..: = .:;; ~. ~:: ...~..:~ .. " "" ' Tr~~kit1g N~~be~~PHPO~-(jo;6'; ,:·" . 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Box 5702 Midlothian, Virginia 23112 Phone: (804) 744-1092 Ce"ular: (804) 928-5167 DEC 18 2009 Fax: (804) 744-2774 December 14, 2009 Jeffrey D. Wiese Associate Administrator of Pipeline Safety U.S. Department of Transportation Pipeline and Hazardous Materials Safety Administration 1200 New Jersey Ave., SE East Building 2nd Floor, Mail Stop: E24-455 Washington, DC 20590 Dear Mr. Wiese, We would like to get an interpretation or an opinion as to whether two specific installations would meet the intent and requirement of Title 49, Part 192.197. We would also like to get your opinion about the meaning oftwo passages in this section. In 192.197 (a)(5) where is states, "to prevent a pressure that would cause unsafe operation of any connected and properly adjusted gas utilization equipment." and in 192.197(c)(3) where it states, "set to open so that the pressure of gas going to the customer does not exceed a maximum safe value," does the wording essentially have the same meaning or does each passage refer to some other different value? In other words, is the point where unsafe operation and exceeding the maximum safe value, the same value? If we assume that this would be at a point at where damage could occur to any appliance regulator, would that be a correct assumption? In the following two installations, we will provide the actual as found conditions including type of equipment. The only assumption we have made is that the type and typical characteristics of the appliance regulators meets the same requirements as for a Maxitrol appliance regulator. Some proprietary controls with built in regulators may have higher or lower maximum pressure restrictions. To arrive at realistic values of load for each installation, we used the load factors as provided by NFPA 54 (ANSI Z223.1) which approximates the actual conditions in type and size. In accordance with Maxitrol Bulletin MI2010-6/05, all of the rated regulators have an lAS Rated inlet pressure as established by ANSI standard Z21.18, of'l2 psi (14 in. w.c.). However, a minority ofthe appliance regulators are rated by Maxitrol at a maximum of 1 psi (28 in. w.c.) and one at a maximum of 5 psi (140 in. w.c.). Generally, none ofthese higher rated regulators would have the characteristics ofregulators used with residential gas fired equipment however. It is also <<>> Michael H. Kyle B. Knight Natural Gas Services P.O. Box 5702 Midlothian, Virginia 23112 Phone: (804) 744-1092 Cellular: (804) 928-5167 Fax: (804) 744-2774 stated that, The maximum Operating Inlet Pressures are tested in excess of theses standards, and recommended by us. For this class of appliance regulators, this value of Maximum Operating Inlet Pressure (MOIP) is the same value as the IAS rating. Maxitrol also states in paragraph 5 of the bulletin that, "Very high pressure surges in the gas supply line (or as a result of exposing the system to high pressure) may result in serious internal damage and cause leakage or affect regulator operation. If you suspect that a Maxitrol regulator has been exposed to more than twice the maximum operating inlet pressure, as shown in the following chart, tum off the gas and have the system checked by an expert." The chart simply refers to the values as stated earlier. We assume from that statement by Maxitrol and referring to their table in their bulletin, that the maximum operating inlet pressure allowed for most residential installations is limited to Yz psi (14 in. w.c.) and that pressures in excess of 1 psi (28 in. w.c.) are likely to cause damage to the appliance regulator. The question then becomes, at what value does 192.197 (a)(5) or 192. 197(c)(3) refer to? Would it be anything above Yz psi (14 in. w.c), 1 psi, or some other value. The following information is drawn from actual installations: Installation 1- Single Service Regulator Premise Type: Single apartment Maximum Load: 160,000 BtulHr. or 160 cu. ft.lHr. Inlet pressure to service regulator: 92 to 98 psig (Supplier's stated average is 94 psi g) Outlet pressure set-point of service regulator: 7" w.c., or 0.25 psig (standard pressure) Service Regulator Data Manufacturer: American Type: 1213B Connection Size: 1 II xl" Orifice: 1/8" Nominal Capacity: @5 psig inlet = 200 SCFH @60 psig inlet = 800 SCFH @ 1 00 psig inlet = 1400 SCFH Approximate Relief Valve Performance: (Note: data provided represents outlet pressure relative to inlet in worst case condition) @5 psig inlet = 19 in. w.c. @60 psig inlet = 27 in. w.c. @ 100 psig inlet = 31 in. w.c. Data Source: American Meter Bulletin, SB-8506.4 <<>> Michael H. Kyle B. Knight Natural Gas Services P.O. Box 5702 Midlothian, Virginia 23112 Phone: (804) 744-1092 Cellular: (804) 928-5167 Fax: (804) 744-2774 Installation 2- Single Service Regulator Premise Type: Single apartment Maximum Load: 160,000 Btu/Hr. or 160 cu. ft.lHr. Inlet pressure to service regulator: 92 to 98 psig (Supplier's stated average is 94 psig) Outlet pressure set-point of service regulator: 7" w.c., or 0.25 psig (standard pressure) Service Regulator Data Manufacturer: Equimeter Type: 143-1 Connection Size: 1" xl" Orifice: 1/8" Nominal Capacity: @5 psig inlet = 250 SCFH @60 psig inlet = 1200 SCFH @80 psig inlet = 1540 SCFH Approximate Relief Valve Performance: (Note: data provided represents outlet pressure relative to inlet in worst case condition) @5 psig inlet =19 in. w.c. @60 psig inlet = 20 in. w.c. @ 80 psig inlet = 22 in. w.c. @1 00 psig inlet = 27 in. w.c. Data Source: Sensus Metering Systems, TD-1301 The approximate relief valve performance is based the work case condition for a new regulator and does not take in to account any blockage ofthe relieve opening over time nor other conditions which might preclude degradation ofthe relief valve performance. Installation 1 clearly shows that under worst case conditions, the value of outlet pressure could exceed 28 in. W.c. which is above the maximum safe value as stated by Maxitrol. In Installation 2, the value of outlet pressure under worst case conditions could approach 26 in. w.c which would be below the maximum safe value as stated by Maxitrol but well above the MOIP. In your opinion, do these installations meet the requirements or intent of the regulations? Our recommendations in both installations, since they already had the smallest orifice available, were to install an appropriate field cut regulator with integral relief valve ahead ofthe service regulator in order to reduce the inlet pressure to as Iowa value of inlet pressure to the service <<>> Michael H. Kyle B. Knight Natural Gas Services P.O. Box 5702 Midlothian, Virginia 23112 Phone: (804) 744-1092 Cellular: (804) 928-5167 Fax: (804) 744-2774 regulator as possible and still have the required capacity. Our train of thought on this was to insure as great a degree of safety as possible and stay within industry practices. In your opinion, would this be a valid recommendation? We certainly appreciate the time and effort on your part and that of your staff in answering our questions. Sincerely, B. Knight Natural Gas Services Michael H. Kyle Enclosures (3): Sensus Metering Systems. TD-1301 American Meter Company, SB-8506.4 Maxitrol, Bulletin MI2011-9/00 <<>> SB-8506.4 1213B2 Service Regulators Maximum Inlet Pressure 125 PSIG AMERICAN METER COMPANY AMC Quality System QMI is Accredited by: AMERICAN METER COMPANY Cert.tcate #006697 ISO 9001 Certified tor Accreditason Dutch Counce Measurement Engineers Since 1836 www.americanmeter.com <<>> 121382 Service Regulators General Information The American Meter Series 121382 pressure regulator is designed for natural gas applications and features a compact, lightweight design for fast, easy installation. Interchangeable orifices and springs provide a wide range of outlet pressures and flow rates. Outlet pressures between 3.5" W.C. and 5 PSIG are available. Operating temperature range is -20' F to 150' F (-30' C to 65' C). Maximum flow rate is 2500 SCFH (70.8 m'Ih). The diaphragm case may be easily removed for routine inspection without disturbing the line connections. All models conform to ANSI Code 8109.4-1998, and CGA Service-type Regulator Specification CAN/CGA-6.18-M9S. Exclusive, 7 - Step Corrosion Protection The protective finish on the 121382 regulator resists corrosive effects of weather and harsh environments better than any other in the industry. Each precision die cast aluminum regulator is treated-inside and out-with a special conversion coating that's part of an exclusive, 7-step finishing process. This coating greatly inhibits oxidation of the metal's surface that can eventually compromise the integrity of the metal. It also prevents finish paint from cracking and blistering. A single coat. polyester primer and the high solid polyurethane top coat provides a long-lasting protection to all exterior regulator surfaces. The American Meter conversion coating process meets all environmental protection regulations. High Tensile Strength Valve Bodies Each 121382 regulator is equipped with a high tensile strength cast iron valve body that rotates in 90-degree increments and features extra heavy wall thickness. This provides maximum strength to withstand installation stresses without damage and prevents thread galling experienced with aluminum. 121382 regulator valve bodies are treated with a S-step metal finishing process. The treated metal is painted with a single coat polyester paint. Available valve body sizes are: 3/4" x 3/4", 3/4" x 1" and 1" x 1" NPT or 8SP-TR for 180' valve bodys. Also available is a 90' valve body in 3/4" x 3/4",3/4" xi", 1" x 1" and 1/2" xi" NPT and 3/4" x 3/4" 8SP-TR. Features In response to a market survey, the following features were designed into the 121382 regulator to accommodate the customers needs. • Improved relief performance. • Improved performance repeatability. • Lever design provides for secondary emergency relief in the event of unauthorized removal of the seal plug. • Snap-in internal components (quick change outs). • Non-adjustable relief. • Larger seat disc area. • 12138 and 121382 use the same seal plug to avoid loss of emergency relief should the seal plugs be interchanged. Application The 121382 features a full capacity internal relief valve with large passages to assure the fast release of gas (See performance graphs on page 5). For added protection, a secondary relief valve stop is provided to assure operation under the most severe conditions and in the event the seal plug has been removed. The standard relief spring setting is 8.0· W.C. above the normal 7" WC. outlet pressure. Valve body configuration permits the 121382 regulator to be supplied in four positions as specified on page 7. All 121382 regulators are available with either right angle (90-degree) or straight flow (i80-degree) valve bodies. Vents can also be supplied in four different positions. The 121382 regulator is designed with an extra large, removable weather and bug-proof stainless steel screened vent to resist freeze-ups and to exclude foreign matter. The vent is threaded 3/4 inch NPT making it suitable for indoor installations. CD AC250 Aluminumcase Meter; @ 121382 Regulator; 2 <<>> 121382 Service Regulators Options Meter Bar- The 121382 regulator can be used with a detachable meter bar 3/4" x 3/4· (Part number 72476G001), 3/4" x 1" (Part number 72476G003) and 1" x 1" (Part number 72476G004) for compact and convenient installation to meters with 6" connection centers. Use of a meter bar prevents piping stress from being transferred to the gas meter. Vent Elbow- The regulator vent opening should face downward (6 o'clock) to minimize the chance of blockage from ice and snow. If not, a 3/4" NPT plastic. 900 vent elbow (Part number 78041 P025) and separate protective screen (Part number 70400P017) may be screwed into the vent to provide the necessary protection. Elevation Compensation- E.C. orifices are also available. which provide constant outlet pressure even when inlet pressure fluctuates greatly. The elevation compensation orifice is a device which reduces changes in regulator outlet pressure due to change in inlet pressure. The E.C. orifice is recommended for installations where the inlet pressure may vary over a wide range. The E.C. orifice is available in two sizes: 1/8" x 3/16" (Part number 73698G006) and 3/16"(Part number 73698GOO5). Its capacity is the same as a standard orifice of the same size. Consult your American Meter Sales Representative for specific applications. ~--------5·--------~ I-- 2-25132" 4-9116" Model 121382-900 5-5116" --------~ ~--------5·--------~ Model 121382-1800 3 <<>> , 121382 Service Regulators 121382 Regulator Capacity Performance Capacity 3/4" Outlet 121382 Regulator Set Point 7.0" W.C. @ 50 SCFH SCFH 0.60 specific gravity gas @ 60· F & 14.7 PSIA. Pressure spring 70017P084. Outlet pressure variance not to exceed +2" ·1" W.C. from set point, horizontal poSition. [ > kMt OdkeSia I '. CPSIG} 111 3111 114 5111 " t 175 225 225 2 225 400 375 , 175 275 450 500 5­ 200 350 650 700 to 300 600 950 1100 IS 325 800 1100 1400 21 475 1100 1400 1800 as 600 1400 2200 2500 SO 700 1800 2200 10 700 2100 2200 75­ 750 2200 100 1100 2200 121 1100 For OPtimum psrlormanctJ, rrIaXJI'f'IUITI inJel pnIUUf1I should 001 ~maxim.Jm capacity rating for any giv9n orrfic6 Sf.Z~ Capacity 3/4" Outlet 121382 Regulator Set Point 2 PSIG @ 50 SCFH SCFH 0.60 specific gravity gas @ 60· F & 14.7 PSIA. Pressure spring 70017P085. Outlet pressure variance not to exceed +/- 10% from set point, horizontal position. ·:. 1nIII OriIIceSia ' (PSIG) 111 3111 114 5111 , 75 100 150 150 S 125 175 225 250 I 10 175 250 350 375 · ,,15 225 350 475 500 U 325 475 650 750 . Sf 350 600 850 1000 SO 475 700 1100 1200 10 600 850 1200 1400 · 75 700 1000 1400 1800 . 100 900 1300 '121 1000 For optimum pe;1ormancs_ maxImUm ,n/9! (J(8SSU1'S should not a.rc86d m.u~Jm capaary rafll19 foI any gt~ orrf1C8 sa• . 4 Capacity 1" Outlet 121382 Regulator Set Point 7.0" W.C. @ 50 SCFH SCFH 0.60 specific gravity gas @ 60' F & 14.7 PSIA. Pressure spring 70017P084. Outiet pressure variance not to exceed +2" ·1" W.C. from set point, horizontal position. .' InIII OrIIceb , ,(PSIG) 111 3111 114 511. 1 175 225 225 2 225 400 375 S 175 275 475 500 5 200 350 650 750 10 300 600 1000 1200 15 350 800 1400 1600 2S 475 1100 2000 2500 35 600 1400 2500 2500 60 700 1800 2500 2500 10 800 2100 2500 2500 7S 900 2500 2500 100 1400 2500 12. 1600 For optImum pe.rfOrmance. tnaXlfflum inl81 pre541.Jl9 5houJd nO! exr:Hd maxlfTltim C8paci~ ratJng /0( any gMm onfic8 SJZ9. Capacity 1" Outlet 121382 Regulator Set Point 2 PSIG @ 50 SCFH SCFH 0.60 specific gravity gas @ 60' F & 14.7 PSIA. Pressure spring 70017P085. Oullet pressure variance not to exceed +/. 10% from set point, horizontal position. InIII OItIk:ab (PSIGl 111 SIt. 114 511. S 75 125 150 150 5­ 125 175 225 250 10 175 250 325 375 " 225 325 400 400 25 300 425 600 600 U 375 500 750 900 50 475 700 1000 1100 fiO 550 800 1100 1200 .75 650 1000 1400 1400 100 1000 1400 12. 1000 For optimum perlcxmance. maximum rnJet pressure ShoUld nor fJxcHd maximom C8paC1ty rarll"lg for any grven ordice SJZ(J. <<>> 121382 Service Regulators 121382 Regulator Relief Valve Performance There are several methods of measuring the relief performance of a regulator. For the 121382 service regulator, the worst case scenario will occur when the lever is disconnected. The data presented in the tables below represent this condition. Outlet Pressure Relative To Inlet Pressure 3/4" Screened Vent - No Vent Pipe Set Pressure 7" W.C. Outlet Pressure Relative To Inlet Pressure 3/4' Screened Vent - 10 Foot Vent Pipe with 2 Elbows Set Pressure 7" W.C. 90 70 I~ I I~ 1 I .~~ I I / ~ .' rt -- -7'-- -- - -- --- / 1/ J , V , I ift. ~ ~ 10 o o 10 20 30 40 50 60 70 80 90 100 110 120 130 Inlet PreSsure - PSIG 90 70 ci JI~ J '$ J .~ I / / " j .".' I V " .. ' / ~ ",60 .. .c u - - -ff­- - '-L ""ii8'f' V ~50 J l/ lr;jjj- ! " " J / , /' :- / ./ ~ / V ­ , J V '.-" ~ " ! "40 a. 130 r.---/---- --- :; #- + - ? ~- r--­ - - - o 20 ,/' ---10 o Outlet Pressure Relative To Inlet Pressure 3/4" Screened Vent - No Vent Pipe Set Pressure 2 PSIG 9 / II'5iW ~ 8 9 8 7 / 7 7 I / V Cl Cl 6 (i) 6 (i) a. , ! 5 V V k-"" §: 6 ~ a. , e 5 ~ '" ~ .. ! 4 ! 4 a. a. 1 ~2:: a; :; /; 0 3 0 , ~~ ~ 3 ~ 2 2 o I ,. . o o 10 20 30 40 50 60 70 80 90 100 110 120 130 Inlet Pressure - PSIG o 10 20 30 40 50 60 70 80 90 100 110 120 130 Inlet Pressure - PSIG Outlet Pressure Relative To Inlet Pressure 3/4" Screened Vent · 10 Foot Vent Pipe with 2 Elbows Set Pressure 2 PSIG J 'e / r$ L / J J V ~ :',' .' / / / ~ ./ . I / V ",...,. ~ ~ V , ~ ~ ~. ;L. ;io"" V ~ -­~ -­~ ~ - ,. , o 10 20 30 40 50 60 70 80 90 100 110 120 130 Inlet Pressure - PSIG 5 <<>> f 121382 Service Regulators Pressure Springs Maximum Recommended Inlet Pressure Outlet Pressure Color Code Part Number 121382 Orifice Size Inlet Pressure (PSIG) 3.5' to 7' W.C. Light Blue 70017P083 1/8" 125 5" to 9" W.C. Lavender 70017P084 3/16' 125 6" to 15" W.C. Light Gray 70017P088 1/4" 125 18" to 2 PSIG Light Green 70017P085 5/16' 100 2 to 4 PSIG Pink 70017P086 4 to 5 PSIG Turquoise 70017P087 Orifice Sizes Orifice Size Part Number 121382 5/16" 72494P022 1/4' 72494P043 3/16' 72494P042 1/8" 72494P040 Full Open Regulator Relief Capacity For sizing downstream relief valves, use Key: the following formulas to determine the Q Maximum capacity of regulator regulator full open capacity: C Orifice constant, see table P, Inlet absolute pressure (PSIA) For critical flow rates For sub-critical flows P2 = Outlet absolute pressure (PSIA) h = Differential pressure (P1 - P2) Q = 0.5 C x vG Q=C- · P, \Pzh G = Specific gravity of gas VG Orifice C 1/8" 20 3/16" 46 1/4" 80 5/16' 150 6 <<>> 121382 Service Regulators Regulator Assembly Positions For 900 Models Valve Body Poaltlon • A· P.6.gulator Assembly Positions For 1800 Models Valve Body Position • A" S~"'fli"A Pc. ~ Valve Body Position ·C" Valve Body Position "B· Valve Body Position "0" Valve Body Position "B" 7 <<>> 12J~B2 Service Regulators Construction Lower Diaphragm Case - Precision die cast aluminum with a exclusive 7 -step advanced conversion coating. single coat polyester primer and High Solid Polyurethane Top Coat. Top Assembly - Precision die cast aluminum with a exclusive 7-step advanced conversion coating. single coat polyester primer and High Solid Polyurethane Top Coat. Valve Body. Cast grey iron. undercoated. single coat polyester primer and High Solid Polyurethane Top Coat. (Rotates in 90 degree increments). Pressure Spring· Steel. Zinc plated and yellow chromate. Color coded for identification. Diaphragm Plate - Steel. terne plated. Seat Disc· Buna-N. Orifice - Super high strength. corrosion-resistant, aluminum. Lever - Stamped aluminum. Vent Screen - Stainless steel. Seal Plug - Ultraviolet ~t. abilized. minion. Corrosion Protection Ordering Information 1 Model number. 2 Size of inlet and outlet. 3 Inlet pressure, psi. 4 Outlet pressure. inches W.C. (or PSIG). 5 Flow. scfh. 6 Kind and specific gravity of gas. 7 Orifice size. 8 Regulator assembly position number. 9 Possible variation in inlet pressure for E.C. Orifice models. Maximum PSIG Min imum PSIG Shipping Weight28 Ibslcarton of eight regulators Regulator Pressure Rating 125 PSIG =Maximum recommended inlet pressure for normal service. Maximum recommended pressure may vary with orifice size. 175 PSIG = Maximum inlet pressure for abnormal or emergency service. without causing damage to regulator case. 5 PSIG = Maximum outlet pressure for normal service. 10 PSIG = Maximum outlet pressure which can be contained by pressure carrying components (no flange leakage to atmosphere except for normal relief action). If regulator Is subjected to these conditions, it should be removed from service. 50 PSIG = Maximum outlet pressure for abnormal service without damage to internal components. If regulator Is subjected to these conditions, it should be removed from service. Due to continuous development the Information In this document Is subject to change. AMERICAN METER 300 Welsh Road, Building One. Horsham, PA 19044·2234. USA. Tel: (21 5) 830-1 800. Fax: (21 5) 830-1 890 CANADIAN METER 3037 Oerry Road, West. ),1IIIon, Ontario L9T 2X6. Canada . Tel: (!}OS) 878·2361 . Fax: (905) 878-5758 E!..5TE' · . AMCO 8 PS/2500103-01 FP 02-96 <<>> TD-1301 Sensus Metering Systems Model 143-80 Service Regulator Models: 143-80-1 143-80-2 143-80-2HP l' x l ' l ' xl-1 /4" Valve Body: Cast Iron, 125 psig Working Pressure Straight Body Spring and lower Case: Die-Cast Aluminum 3/4' x 3/4' Orifice: Stainless Steel 3/4" x l ' Fulcrum Pin: Aluminum or Brass 3!4' x1 -114" Valve Seat/Stem: One piece molded Buna-N seat pad and fiberglass reinforced nylon stem Throat/Support/Stem Guide: Cast Aluminum integral to lower case Oiaphragm Plate: Plated Steel 1-1 /4' x1-114' Diaphragm: Nylon fabric reinforced Buna-N with full 26 in2effective area Vent and Valve: Precision-fit polyethylene valve and seat, threaded 3/4' or l ' NPT Operating Temperature: -200 Fto 1500 F(-28.90 Cto 65.50 C) Corrosion Protection: Cases dip primed chromate conversion coating, topcoat enamel Internal Relief Valve: Set to relieve at approximately 7" w.c. above normal outlet pressure setting Spring Ranges Outlet Pressure Spring Ranges Color 3'1," to 6'1," w.c . Red , Orifice and MaXimum Inlet Pressure Spring Orifice Part Number Pressure Part Number 'Ie ' aluminum 143-62-023-37 125 psig 143-62-021-15 3;:, aluminum 143-63-023-40 125 psig 143-62-021-16 'I.' aluminum 143-62-023-42 60 psig 143-62-021-17 v,.. aluminum 143-62-023-43 40 psig 143-62-021-18 '1,' aluminum 143-62-023-44 40 psig 143-62-021-22 '1,' aluminum 143-62-023-45 20 psig 173-62-021-02 Ye ' aluminum 143-62-023-46 10 pSig 139-16-021-01 Relief Valve Performance: lever blocked with valve disc in the Wide open position 5' to 8'1,' w.C. Blue 6" to 14' w.c. Green 12' to 28' w.c. Orange 'I, psi to 2 psi Black & White Y, psi to 3 psi Cadmium' 2 to 6 psi Black' 'For high pressure model 143-80-2HP i. 2 ...............I-'--t'-'-;----/-c-'--:.....,......-,--'-7-'T-H ~ i11t ... j1~ 1-'-+--/~4---'--;--,--~4-r-'---'--'- l 1 ~ 1 J---,f.+-~-'-'-+::;......,.--,-,_-~-i---=I i ~ i ~ ~~----;--;-,~-=:----'-'-l ~ .~~------~~~----~--~ 51 68 11 so 9t 1. • 1. 21 30 41 IIILET PII£SSIIIIE -w l1li Maximum Emergency Pressure The maximum pressure that the model 143-80-1 , 143-80-2 and 143-80-2HP regulator inlets may be subjected under abnormal conditions without causing damage to the regulator is the stated Maximum Inlet Pressure + 50 psi Note: For the Low Pressure Cut Off version model 143-80-6 it is Maximum Inlet Pressure + 10 psi. See bulletin TD-1301-L The maximum pressure to which the 143-80 diaphragm case may be subjected under abnormal conditions without causing damage to the internal parts of the regulator is the set point + 3 pSi. If the outlet pressure exceeds this pressure. the regulator must be removed from service and carefully inspected. Damaged or otherwise unsatisfactory parts must be replaced before returning the regulator to service . The maximum outlet pressure that can be safely contained in the 143-80 diaphragm case is 10 psi (safely means no leakage as well as no bursting). Full Open Capacity Use the following formula for the full open capacity: 1. Q = K-/ P 0 (Pr - Po) ... . (for f less than 1.894) o 2. Q =¥'-........ ......... .(fOr~ greater than 1.894) Q =maximum capacity of the regulator (in SCFH of 0.6 specific gravity natural gas). K = the "K" factor, the regulator constant from the lable below. P =absolute inlet pressure (psia). P , = absolute outlet pressure (psia). Orifice %" Yz" %" 0/16· Yc. 0/16· Va" K 820 520 292 206 132 74 33 ~seNSUS :::,/ METERING SYSTEMS <<>> Inlet Onfice '. Model 143-80 Technical Data Capacities Body Size 3W x 3W Flow capacities in SCFH natural gas (0.6 specific gravity - 14.65 psia - 60°F) Capacities are based on the following maximum variations in outlet pressure: Red and Blue Springs - 1" w.c. droop Orange Spring - 3" w.c. droop Green Spring - 2" w.c. droop Black Spring -10% droop Note: The 1/2 psig, 1 psig and 2 psig inlet pressures apply only to Red and Blue springs. Note: The last capacity figure in each column indicates the maximum capacity for each onfice at recommended pressure within the optimum performance range. The performance data is based on normal testing at 70°F flowing temperature. Changes in performance can occur at extreme low flowing temperatures. Other Gases 143-80 Regulators are mainly used on natural gas. However, they perform equally well on LP gas, nitrogen, dry C02, air and others. Other Gases Correction Factor psig 112 . 1 :-, 2 3 5 . 7.5 10 20 40 ' .. .. 60 so 125 1/8" - 3/16" - " - - - - .530 - 420 600 . ·250 560 . 700 310 700 840 370 ' 830'< '. 950 530 1200 1220 860.' , ~57(l . . 1330' 1200 1660 1520 1500 . 1710 - 1800 1900 1W 5/16" 3/8" l,'Z· 5/8" . ' . - 340 .'. 450 51& 480 500 510 530 '· 560 570 · 5SO 600 620 630 650 670 .720.. ··· 730 .. no :.· 790 860 880 900 900 . 970 1000 ·' I 1020 1020 1240 1250 1270 - · 1340 1450 : . "'" - - - - - . '. - - - -.~. , - - - - Body Size 3/4" x 1· -1" x 1" Inlet Onfice Air (Specific Gravity 1.0) 0.77 Propane (Specific Gravity 1.53) 0.63 1350 BTU Propane Ai r Mix (1.20) 0.71 Nitrogen (Specific Gravity 0.97) 0.79 Dry Carbon Dioxide (Specific Gravity 1.52) 0.63 pslg 1/8" 3/16" 1/4" 5/16" 3/8" 1/2" 5/8" ta. " - -.' ' ~ '.' - 1. 350 .' 400: 520 • 1 - - - 480 550 600 650 t c - - 53{j; : 700:, 840. 880; • 7SO' 3 - 420 650 870 1000 920 810 "5' . : 250 . . 5SO , 89Q: i12(j, 1100 ; 950:, 970 7.5 310 700 1140 1340 1270 1140 1060 1e V 371), . 1 .> .S4{)i t 136>> BULLETIN MI2011-9/00 SAFETY WARNING INSTRUCTIONS MAXITROL CSA DESIGN CERTIFIED GAS PRESSURE REGULATORS NOTE: GAS PRESSURE REGULATORS WILL f:!QI TURN OFF THE FLOW OF GAS. A SPECIAL WARNINGS DIRECTIVES DE SECURITE REGULATEURS DE PRESSION DE GAZ MAXITROL CERTIFIES CSA REMARQUE: LES REGULATEURS DE PRESSION DE GAZ N'INTERROMPENT PAS L:ECOULEMENT DU GAZ. A AVERTISSEMENTS PARTICULIERS IFYOU DO NOT FOLLOW THESE INSTRUCTIONS EXACTLY, A FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE. NO UNTRAINED PERSON SHOULD ATIEMPT TO INSTALL, MAINTAIN OR SERVICE GAS PRESSURE REGULATORS. To minimize the possibility of FIRE, EXPLOSION, and OTHER HAZARDS: 1. All products, including gas pressure regulators, used with combustible gas must be installed and used strictly in accordance with the instructions of the manufacturer, with government codes and regulations, and plumbing codes and practices. 2. Do not use a gas pressure regulator if it appears to have been subjected to high temperatures, damaged in any way, or to have been taken apart or tampered with. Any of these may be signs of possible leakage or other damage that may affect proper operation and cause potentially dangerous combustion problems 3. a. Install the regulator properly with gas flOWing as indicated by the arrow on the casting. b. Use pipe compound or thread sealant, property threaded pipes and careful assembly procedure so that there is no cross threading, etc., which might cause damage or leakage. c. Apply wrench or vise pressure only to the flat areas around the pipe tappings at the end being threaded to the pipe to avoid possible fracture of the regulator body which could result in leakage d. Make sure markings or wording on regulator are not painted over or obliterated . 4. Check carefully for gas leaks immediately after the regulator has been installed and the gas turned on. Do this before attempting to operate the appliance or other gas burning device. Use a rich soap solution (or other accepted leak tester) around the diaphragm flanges, bottom plate, vent opening, seal cap, pipe connections, and all other joints. Wipe clean with a damp rag. It is a good practice to periodically check for leakage during use of the appliance. Absolutely no leakage should occur, otherwise there is a danger of fire or explosion depending upon conditions. Never use if leakage is detected. .ACAUTION LA NON-CONFORMITE AUX DIRECTIVES QUI SUIVENT PEUT PROVOQUER UN INCENDIE OU UNE EXPLOSION QUI PEUT ENDOMMAGER LA PROPRIETE. OU ENCORE CAUSER DES BLESSURES OU ENTRAINER LA MORT. AUCUNE PERSONNE NE POSSEDANT PAS LA FORMATION REQUISE NE DEVRAIT TENTER D'INSTALLER, D'ENTRETENIR OU DE REPARER DES REGULATEURS DE PRESSION DE GAZ. Pour r6duire au minimum les risques d'INCENDIE, D'EXPlOSION, ET AUTRES RISOUES: 1. Tous les produits, y compris les regulateurs de pression de gaz, utilises avec des gaz combustibles dolvent ~tre installes et employes en strlcte conformite avec les directives du fabricant, les codes et reglements gouvemementaux et les codes et pratiques en matiere de plomberle. 2. Ne pas employer un regulateur de pression de gaz qui semble avoir ete soumis ill des temperatures elevees, endommage de quelque fayen que ca soit, avoir ete de monte ou manipule. Toutes cas situations indiquent des possibilites de fuite ou de tout autre dommage qui pourrait nuire au bon fonctionnement de I'appare~ et provoquerdes problemes de combustion potentiellement dangereux. 3. a. Installer Ie regulateur correctement de sorte que Ie gaz s'ec - **truncated:** true - **body characters:** 51151