Sensus 243-12-4 Manual
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Sensus 243-12-4 Manual

Service regulators
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Model 243
R-1306
Rev. 10
Service Regulators

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Summary of Contents for Sensus 243-12-4

  • Page 1 Model 243 R-1306 Rev. 10 Service Regulators...
  • Page 2 2” 243-12-2 temperatures from -20 F to 150 243-8-1 ⁄ ”,1 ⁄ ” Buried Service and 2” 243-8-2 The Model 243 Regulator is not recommended for buried service. ⁄ ”,1 ⁄ ” 243-8HP and 2” Copyright 2007, Sensus Metering Systems...
  • Page 3 Maximum Inlet Regulator Model ⁄ ” ⁄ ” 1” *1” ⁄ ” ⁄ ” ⁄ ” ⁄ ” ⁄ ” .207” Pressure, psig and Size ⁄ ”, 243-12 ⁄ ”, 243-12 2”, 243-12 ⁄ ”, 243-8 ⁄ ”, 243-8 2”, 243-8 ⁄...
  • Page 4 Can also be furnished with British Standard Threads (BST) Model 243-12-1 Travel Stop A travel stop is located in the 243-12-1 and the 243-12-4 to provide overpressurization protection. Caution: Turn gas on slowly. If an outlet stop valve is used, it should be opened first. Do not overload the diaphragm with a sudden surge of inlet pressure.
  • Page 5 Operation of the Internal Relief Valve The internal relief valve is optional (refer to Basic Models Table, page 2). Often called an “IRV”, it is built into center diaphragm assembly shown in the adjoining sketch and works in essentially the same way as standard relief valves.
  • Page 6 243 Variations Internal Relief Valve The 243 is available with an internal relief valve (IRV). It’s a built-in safety device for providing a limited level of overpressur- ization protection. Like any relief valve, an IRV must be carefully sized. More complete description plus performance data is given on page 5.
  • Page 7 Monitoring and External Control Line This 243 is used for the first regulator (upstream regulator) in a monitor set or for other applications requiring an external down- stream control line. A throat block with an o-ring stem seal isolates the lower diaphragm chamber which has a ⁄...
  • Page 8 Model 243 Capacity Tables 2” Models 243-12-1 and 243-12-2 in SCFH of Natural Gas º (0.6 Specific Gravity - 14.65 psia - 60 Orifice Size and Valve Angle Outlet Pressure Inlet and Spring Pressure ⁄ ” 1” ⁄ ” ⁄ ”...
  • Page 9 Model 243 Capacity Tables 2” Models 243-12-1 and 243-12-2 in SCFH of Natural Gas º (0.6 Specific Gravity - 14.65 psia - 60 (continued) Orifice Size and Valve Angle Outlet Pressure Inlet and Spring Pressure ⁄ ” 1” ⁄ ” ⁄...
  • Page 10 Model 243 Capacity Tables ⁄ ” Models 243-12-1 and 243-12-2 in SCFH of Natural Gas (0.6 Specific Gravity - 14.65 psia - 60ºF) Orifice Size and Valve Angle Outlet Pressure Inlet and Spring Pressure ⁄ ” 1” ⁄ ” ⁄ ”...
  • Page 11 Model 243 Capacity Tables ⁄ ” Models 243-12-1 and 243-12-2 in SCFH of Natural Gas (0.6 Specific Gravity - 14.65 psia - 60ºF) (cont’d.) Orifice Size and Valve Angle Outlet Pressure Inlet and Spring Pressure ⁄ ” 1” ⁄ ” ⁄...
  • Page 12 Model 243 Capacity Tables ⁄ ”, 1 ⁄ ” and 2” Model 243-12-1 with External Control Line in SCFH of Natural Gas (0.6 Specific Gravity - 14.65 psia - 60ºF) Orifice Size and Valve Angle Outlet Pressure Inlet and Spring Pressure ⁄...
  • Page 13 Model 243 Capacity Tables ⁄ ”, 1 ⁄ ” and 2” Model 243-12-1 with External Control Line in SCFH of Natural Gas (0.6 Specific Gravity - 14.65 psia - 60ºF) (cont’d.) Orifice Size and Valve Angle Outlet Pressure Inlet and Spring Pressure ⁄...
  • Page 14 Model 243 Capacity Tables ⁄ ” and 2” Model 243-8-1 and 243-8-2 in SCFH of Natural Gas (0.6 Specific Gravity - 14.65 psia - 60ºF) Orifice Size and Valve Angle Outlet Pressure Inlet and Spring Pressure 1” ⁄ ” ⁄ ”...
  • Page 15 Model 243 Capacity Tables ⁄ ” Models 243-8-1 and 243-8-2 in SCFH of Natural Gas (0.6 Specific Gravity - 14.65 psia - 60ºF) Orifice Size and Valve Angle Outlet Pressure Inlet and Spring Pressure 1” ⁄ ” ⁄ ” ⁄ ”...
  • Page 16 Model 243 Capacity Tables ⁄ ” Models 243-8-1, 243-8-2, 243-12-1 and 243-12-2 in SCFH of Natural Gas (0.6 Specific Gravity - 14.65 psia - 60ºF) Orifice Size and Valve Angle Outlet Pressure Outlet Pressure Inlet and Spring and Spring Pressure ⁄...
  • Page 17 Model 243 Capacity Tables ⁄ ” Models 243-8-1, 243-8-2, 243-12-1 and 243-12-2 in SCFH of Natural Gas (0.6 Specific Gravity - 14.65 psia - 60ºF) (continued) Orifice Size and Valve Angle Outlet Pressure Outlet Pressure Inlet and Spring and Spring Pressure ⁄...
  • Page 18 Model 243 Capacity Tables 2” Models 243-8-1 and 243-8-2 in SCFH of Natural Gas º (0.6 Specific Gravity - 14.65 psia - 60 Orifice Size and Valve Angle Outlet Pressure Inlet and Spring Pressure 1” ⁄ ” ⁄ ” ⁄ ”...
  • Page 19 Model 243 Capacity Tables Model 243-8HP in SCFH of Natural Gas (0.6 Specific Gravity - 14.65 psia - 60ºF) ⁄ ” Model 243-8HP ⁄ ” Model 243-8HP 2” Model 243-8HP Inlet Orifice Size and Valve Angle Orifice Size and Valve Angle Orifice Size and Valve Angle Outlet Pressure Pressure...
  • Page 20 The maximum pressure the A travel stop stem is located in diaphragm may be subjected to exceeded, the regulator must be the 243-12-1 and 243-12-4 to taken out of service and inspect- Before using any of the above without causing damage to the...
  • Page 21 ⁄ ” ⁄ ” ⁄ ” ⁄ ” ⁄ ” Shipping* Weight lbs. lbs. lbs. * Add 9 lbs. for flanges on 2” body ** 10” for 243-12-1 and 243-12-4, which include travel stop *** ANSI Flanges **** ND-10 Flanges...
  • Page 22 While used primarily on natural gas services, Model 243 regulators perform equally as well on LPG vapor, air, CO , nitrogen and other inert gas applications. Please contact your Sensus Metering Sys- tems representative for special construction which may be avail- able for certain corrosive gases.
  • Page 23 Capacity to 76,000 SCFH to 100 psi line. Appropriate for fixed fac- Capacity to 414,000 SCFH tor billing. Sensus Metering Systems also produces Industrial and Combustion Regulators; High Pressure, High Capacity Regulators: and Safety Relief Valves. Detailed information available upon request.
  • Page 24 Sensus Metering Systems, 805 Liberty Boulevard DuBois, PA 15801 (814) 371-8000 FAX (814) 375-8460 www.sensus.com Representatives in all principal cities. Distributors throughout the world. Sensus Metering Systems 805 Liberty Boulevard DuBois, PA 15801 www.sensus.com Authorized Distributor: NUPP 5/07 3M PRINTED IN U.S.A.

This manual is also suitable for:

243-12-1243-12-2243243-12-6

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