Document KJbw5K4Lqkxyz4Ybz43DgYXBx

640 CHAPTER 27 1956 Guide Table 14. Dimensions of Malleable 90-Deg Elbows, Deg Elbows (Straight Sizes, 150 Tees, Lb); Crosses, and 45- Nominal Pipe Size Center to End, Elbows, Tees, and Center to End, 45-deq Elbows Thread, Min Band, Min IInside Diameter1 of FnTlNO Metal Thickness B Mia Max G H H H H 0.69 0.81 0.95 1.12 0.73 0.80 0.88 0.25 0.32 0.36 0.43 0.200 0.215 0.230 . 0.249 0.405 0.540 0.675 0.840 0.435 0.584 0.719 0.897 0.090 0.095 0.100 0.105 H 1 1M 1M 1.31 1.60 1.75 1.94 0.98 1.12 1.29 1.43 0.50 0.58 0.67 0.70 0.273 0.302 0.341 0.368 1.050 1.315 1.660 1.900 1.107 1.385 1.730 1.970 0.120 0.134 0.145 0.155 2 m 3 3H 2.25 2.70 3.08 3.42 1.68 1.95 2.17 2.39 0.75 0.92 0.98 1.03 0.422 0.478 0.548 0.604 2.375 2.875 3.500 4.000 2.445 2.975 3.600 4.100 0.173 0.210 0.231 0.248 4 5 6 3.79 4.50 5.13 2.61 3.05 3.46 1.08 1.18 1.28 0.661 0.780 0.900 4.500 5.563 6.625 4.600 5.663 6.725 0*265 0.300 0.336 From American Standard for Malleable-Iron Screwed Fittings, 150 Lb. ASA B16.3-1951. All dimensions given in inches. Outside Diameter of Band, Min 0.693 0.844 1.015 1.197 1.458 1.771 2.153 2.427 2.963 3.589 4.285 4.843 5.401 6.583 7.767 Table 15. Dimensions of Brass or Crosses, 45-Deg Elbows, and Bronze Screwed 90-Deg Elbows, Couplings (Straight Sizes 125 Lb) Tees, Nom inal Pipe Size Center to End Elbows, Tees, Crosses Thread, Min Cen ter to End 45-Deg El i Diameter Wrought Coupling bows Band Length, Min . Inside Diameter or Cast Fitting Min | Max Metal Thick- Min Band Dlam- Min End to End Straight Coupling Cast] Wrought B F GH W H H H H M 0.54 0.71 0.82 1.01 1.18 0.25 0.32 0.36 0.43 0.50 0.42 0.66 0.63 0.78 0.89 Me iHa lHe lMo 1 1H m 1.43 1.69 1.84 0.58 0.67 0.70 . 1.06 1.22 1.30 2 2tf 2.12 2.70 3.08 0.75 0.92 0.98 1.45 1.95 2.17 3.79 1.08 2.61 0.14 0.16 0.17 0.19 0.23 0.27 0.31 0.34 0.41 0.48 0.55 0.66 0.41 0.54 0.68 0.84 1.05 0.44 0.58 0.72 0.90 1.11 1.32 1.39 1.66 1.73 1.90 1.97 2.38 2.88 3.50 4.50 2.45 2.98 3.60 4.60 0.08 0.08 0.09 0.09 0.10 0.11 0.12 0.13 0.15 0.17 0.19 0.22 0.67 0.81 1.00 1.17 1.42 1.72 2.10 2.38 2.92 3.49 4.20 5.31 0.80 0.97 1.05 1.29 1.43 1.68 1.86 1.92 2.20 2.88 3.18 3.69 0.83 1.11 1.56 1.60 From American Standard for Brass or Bronze Screwed Fittings, 126 Lb. ASA B16.16-1947. All dimensions even in inches. Pipe, Fittings, Welding 641 except that the outlet face is at an angle of 90 deg from the inlet face. -An angle valye takes the place of a globe valve and. an elbow. 3. Checking flow: Preventing back flow is called checking, hence, a check valve is used. The basic principle of all check valves is that a reversal of flow will close the valve. Check valves are either swing check or lift check. With a swing check the fluid presses on a hinged flap. If the flow stops or reverses, the flap swings down and seats itself to close the valve. A lift check operates similarly except that the flap is replaced by a plug that is lifted--through guides--by the force of the fluid flow. The fluid changes direction of flow, as in a globe valve, and transmits a vertical Table 16. Dimensions of Cast Brass Solder-Joint Elbows, Tees and 45-Deg Elbows. (Straight Sizes) Standard Water Tube Size Latino Length* Tee and Elbow Center to External Shoulder 90-Deg Street Elbow Laying Lbntgh 45-Deg Elbow Center to External Shoulder 45-Deg Street Elbow HI JQ 34 34 H H 1 134 ltt 2 234 3 3M H Me 34. Hi H 34 1 134 m 134 2 H Hi Hi `Hi H 1 134 134 1H m Hi Hi 34 Me Hi 34 Hi H 34 34 4 234 234 Me 5m IMe 6 3M 134 8 fH 234 From American Standard for Cast-Brass Solder-Joint Fittings, ASA B16.18-1950. All dimensions given in inches. * Not standardized for wrought fittingB. Consult manufacturer for dimensions. Hi Hi 34 34. Hi 34. 34 thrust. If the flow stops, gravity pulls the plug downward and closes the valve A reversal of flow will close the valve. Two other types of valves are the relief valve and the pressure regulat ing valve. Relief valves are usually spring loaded in order that some pre determined pressure can force the valve to open and relieve the pressure. Pressure regulators are used to reduce a high incoming pressure to a re quired service pressure. These valves are designed to eliminate a fluctua tion in the incoming pressure and thereby maintain a steady, lower service pressure (see Chapter 21). Table 18 contains data on the dimensions of flanged and welding end valves. Dimensions of other type valves can be obtained by writing to the Manufacturers Standardization Society of the Valve and Fitting Industry.