FLEXIBLE, HIGH PRESSURE GAS PIPE - …

1 2-psi Gas Piping MS2050-08/05 The 2-psi domestic gas piping concept was first introduced nearly 40 years ago, and has become a proven cost-savingload builder for gas utilities, as well as a viable option for HVAC system consists of gas metered at 2-psi (or sometimes 5-psi), with tubing used instead of traditional pipe forinternal household distribution. At or near appliances, gas PRESSURE is reduced to 7 or 8 by a Maxitrol 325 Series L-model gas PRESSURE BV Series manual ball valve is also available, designed especially for use with our 325 Series L-model gas pressureregulators. They offer the perfect combination for household piping needs. flexible , high PRESSURE GAS pipe 325 SERIES GAS PRESSURE REGULATOR MANUAL GAS BALL VALVEA Time for , gas piping systems have predominantly been 3/4 black iron or steelpipe. The development of semi-rigid copper tubing and the introduction ofcorrugated stainless steel (CSST) have provided HVAC contractors a way to makethe transition into the field of gas piping systems.

2 The gas piping, however, makesup only one component in the design and installation of the residential andcommercial 2-psi gas piping systems. An operating PRESSURE change is the heart ofthe new system entire 2-psi concept would not have been possible without the development ofthe compact, low-cost Maxitrol pounds-to-inches regulators. These regulatorsreduce inlet PRESSURE as high as 5-psi down to appliance use deliver positive dead-end lockup, the 325 Series L-model regulators feature ahigh leverage valve linkage assembly. They are capable of precise regulatingcontrol from full flow down to pilot flows. When combined with Maxitrol s ventlimiting devices, labor and material costs are reduced by eliminating vent lines to third component of the 2-psi gas piping system is Maxitrol s manual gas ballvalve, which is designed for quick, quarter-turn operation. The 325 Series L-modelgas PRESSURE regulators are CSA certified for 2-psi and 5-psi (see line standard,page 3) system applications.

3 Our manual ball valves are certified as continues to grow at an accelerated rate, as more utilities put the 2-psiconcept to work. The 2-psi system is now being utilized worldwide on newconstruction and LP your Domestic Gas Piping Needs!A copyrighted publication ofTypical 2-psi house piping system usingMaxitrol 325 Series gas PRESSURE regulators Use one with each appliance:1. Gas Furnace3. Gas Dryer2. Gas Water Heater4. Gas RangeElevated PRESSURE Piping Systems Stimulates New Markets: LP conversions, business,multifamily dwellings, new custom and project , 2-psi for residential applications and 5-psifor some commercial applications. Reduces Installation Cost: Cheaper to pipe thanconventional low PRESSURE system. Greater Protection: Less gas leakage from 3/8 diameter tubing semi-rigid piping systems alsocontain less GAS CONVERSIONMany gas utilities are using the 2-psi system forfranchise extension into areas previously served byLPG.

4 There is significant installation savings when theexisting 3/8 OD copper tubing already in the homes isutilized. Since the new meter set may be some distancefrom the old LP tubing, a tie line is sometimes required,and this is often 1/2 tubing. One or more Maxitrol fuelline regulators are installed downstream at the appliancetake-off points, so that no more than 1 drop isexperienced from the outlet of the Maxitrol regulator tothe entrance of the appliance RISE APARTMENTSHigh rise apartment buildings now offer great new loadbuilding capability to gas utilities, as well. Copper tubinghas been used to deliver 2-psi service to high riseinstallations with significant savings over conventionalhigh rise HOMES AND SUBDIVISIONSIn addition, the all gas neighborhood makes a lot ofsense to utilities, builders and home buyers when it simplemented with the 2-psi system. Utilities can offerproject and custom builders a more attractive package ,not only in cost, but in appearance and safety.

5 Thesmall tubing running from meter to appliances definitely clean-up the basement, and pose no more placementor installation problems than electrical an Improved utilities have found less complaint call backswith 2-psi than with a 6 Escapement Volume: Gas at 6 escapes froma 3/4 pipe at about three times the rate of gas from a 3/8 OD tube at 2-psi. The chart below shows flowcomparisons at the discharge end. From the standpointof uncontrolled escape of gas within a building, the 2-psisystem has less flow than the 6 Leakage Complaints: Statistics to date indicateless leakage complaints from the 2-psi system than fromthe 6 system. One utility reported no complaint callbacks within one year in a high rise apartment involving274 Characteristics: The 325 Series L-modelregulator is excellent for controlling the full range of flowrates from main burner loads down to pilot loads. Thelever acting 325 Series regulator possesses excellentlock-up Limiting (325-3L & 325-5AL only): Maxitrol offersoptional vent limiting devices which eliminate the need torun vent piping to an outside area.

6 In the event of adiaphragm rupture, gas escapement is limited to withinANSI standard Practices Proved: Both flared fittings and silversoldered fittings have been used without event onthe 2-psi system. There are fewer joints in the 2-psi system than in the 6 Nailing Problems: At the outset of the 2-psisystem, some feared nails would be inadvertentlydriven into the tubing. However, experience hasshown that nails could not be driven into tubingthat was loose between joists or studs. At pointswhere tubing is to be firmly fixed against wood sothat it is in a rigid state, manufacturers typicallyoffer a variety of shielding FROM OPEN PIPECFH of Natural Gas 1000 Escape VolumeLength of Service25 iron pipe at 6 OD tubing at 2-psi100 supply pressures above 2-psi, the new standardrequires the use of an over- PRESSURE protection device(OPD) for use with the regulator. (See below.)Other 325 Series regulators will continue to be availableas CSA certified appliance regulators, as well asnon-certified models for up to 10-psi inlet PRESSURE (seebulletin MS2055).

7 The New Line PRESSURE Regulator Standard - ANSI 325 Series is suitable for multi-poise mounting. Butwhen using the vent limiting device, the regulator mustbe mounted in a horizontal upright position. Vent limitersare designed for use indoors and spaces where limitingthe amount of gas escapement due to diaphragm failure iscritical. Vent limiters should not be used outdoors if theyare exposed to the for Best Performance3325 Series Line PRESSURE Regulators & OPDs for 2 to 5-psi InstallationsThe ANSI Standard for Line PressureRegulators, installations exceeding 2-psi (up to 5-psi)nominal require a tested and approved over-pressureprotection device (OPD). The OPD limitsdownstream PRESSURE to 2-psi maximum in the eventof line regulator s 325 Series Line PRESSURE Regulators withOPDs are CSA certified ( ) for up to 5-psi inletpressure. Maxitrol built OPDs are approved andtested with the regulator. The companion OPDprovides the required downstream Maxitrol s 325 Series are certified(ANSI ) as appliance regulators (seebulletin MS2055), in the past they have oftenbeen used as line PRESSURE regulators.

8 Thereis now also a new standard for line is the ANSI standard for line pressureregulators, intended for application in naturalgas piping systems and LP (propane).Maxitrol s 325 Series L-models are CSAcertified ( ) for 2-psi inlet PRESSURE , withthe 7 to 11 (inches outlet) L-models are Class 1, pounds toinches line regulators, meetingutility specifications, for use on2-psi piping systems. Theregulators are a high performance type -reducing pounds PRESSURE to a level withinthe appliance s operating supply line regulator is located upstream ofequipment already fitted with an appliance 325 Series L-model regulators feature a lever actuatedvalve, and lockup PRESSURE can vary with the speed of thesolenoid valve and its self-aligning valve is made of nitrile rubber. Housingsare durable aluminum die castings and all internal partsare carefully selected and corrosion resistant. Thediaphragms are of high quality supported synthetic regulator is certified for inlet pressures up to protection is not required for supplypressures up to 2-psi.

9 The regulator itself provides nodownstream over- PRESSURE protection in the event models include: 325-3L47, 325-3L48, 325-5AL48, 325-5AL600. Consult Maxitrol , high PRESSURE Gas PipeAvailable from a variety of piping manufacturers, semi-rigid coppertubing and corrugated stainless steel (CSST) offer severaladvantages over black iron pipe :FEATURES: Polyethylene coated or uncoated flexible piping Easy-to-identify line markings Faster, easier installations Ideal for new construction or retrofit applicationsManual Gas Ball ValveBall valves from Maxitrol have a strong body of forged brass, femaleNPT inlet and outlet, hard chrome plated ball, and anticorrosionDacromet treated : CSA certified ( and ) 1/4 , 3/8 , 1/2 , 3/4 , 1 , 11/4 , 11/2 , 2 , 21/2 , 3 NPTVent Limiting MeansOptional automatic vent limiting device - ball check permits freeinhalation for fast regulator-diaphragm response on opening cycle,but limits gas escapement to within ANSI standards, should adiaphragm.

10 CSA certified for use with 325-3L and 325-5AL European approval 1/8 NPT for 325-3L, 3/8 NPT for 325-5 ALNote:When using the vent limiting device, regulator must bemounted in a horizontal upright position for best limiters must be screwed directly into the regulator ventboss and no intervening piping is ProtectorDesigned for outdoor applications. Use on vent opening to protectbreather hole from rain, snow, dust or other foreign particles : For use in 325-3 and 325-3L. For 1/8 NPT ventNote:Not a vent limiting protector must be mounted in an upright position.(Not available from Maxitrol) RepresentativesWarnstedter Strasse 3, 06502 Thale, Fax 1, 48308 Senden, Fax copyrighted publication ofMaxitrol Company23555 Telegraph Rd., Box 2230 Southfield, MI 48037-2230 Fax