Document rexQyG975M4wZ13Kp4NrDj8GG

682 CHAPTER 26 1957 Guide Table 14. Dimensions .of Malleable 90-Deg Elbows, Tees, Crosses, and 45Deg Elbows (Straight Sizes, 150 Lb) TH c' f- ELBOW ' TEE <5* ELBOW Nominal Pipe Size Center to End, Elbows, Tees, and Cbosses A Centeb 45-deo Elbows C Length Thread, - Min B Width Band, Min E Inbide Diameter op Fitting Metal F Thickness Min Max G Diameter op Band. Min H HH H H 0.69 0.81 0.95 1.12 6.73 0.80 0.88 0.25 0.32 0.36 0.200 0.215 0.230 0.405 0.540 0.676 0.435 0.584 0.719 0.090 0.095 0.100 0.43 0.249 0.840 0.897 0.105 0.693 0.844 1.015 1.197 1 1H 1H 1.31 1.50 1.75 1.94 0.98 1.12 1.29 1.43 0.50 0.273 1.050 1.107 0.120 0.58 0.67 0.302 0.341 1.315 1.385 1.660 1.730 0.134 0.145 0.70 0.368 1.900 1.970 0.155 1.458 1.771 2.153 2.427 2 - 2.25 2H 2.70 -3 3.08 3H 3.42 1.68 1.95 2.17 2.39 0.75 0.92 0.422 0.478 2.375 2.445 2.875 2.975 0.173 0.210 0.98 1.03 0.548 0.604 3.500 3.600 4.000 4.100 0.231 0.248 2.963 3.589 4.285 4.843 4 5 6 3.79 4.60 5.13 2.61 3.05 3.46 1.08 1.18 0.661 0.780 4.500 4.600 5.563 5.663 0.266 0.300 1.28 0.900 6.625 6.725 0.336 5.401 6.583 7.767 From American Standard for Malleable-Iron Screwed Fittings, 150 Lb. ASA B18.3-1951. AH dimensions given in inches. Table 15. Dimensions of Brass or Bronze Screwed 90-Deg Elbows, Tees, Crosses, 45-Deg Elbows, and Couplings (Straight Sizes 125 Lb) Nom inal Pipe Sob Centeb to End Elbows, Tees, Cbosses Length op Thread, Min Cen ter to End 45-Deg El Diameter Wrought Coupling bows Band Length, Min Inside Diameter op Cast Fitting* Min Max Metal Thick ness, Min Band Diam eter, Mm End to End Straight Coupling Cast Wrought A bC D E F GH W 5 u H 0.54 0.71 0.82 1.01 1.18 0.25 0.32 0.36 0.43 0.50 0.42 0.56 0.63 0.78 0.89 He Mi IHe IMe . 0.14 0.16 0.17 0.19 0.23 0.41 0.44 0.54 0.58 0.68 0.72 0.84 0.90 1.05 1.11 0.08 0.08 0.09 0.09 0.10 0.67 0.80 0.61 0.97 1.00 1.05 1.17 1.29 1.42 1.43 0.83 1.03 1.11 1.38 1.60 1 .1.43 : 0.58 1.06 iSm 1.69 0.67 1.22 1.84 0.70 1.30 0.27 1.32 1.39 0.11 1.72 1.68 0.31 1.66 1.73 0.12 2.10 1.88 0.34 1.90 1.97 0.13 2.38 1.03 8 2.18 0.75 1.46 23 H -2.70 3.08 0.92 1.95 0.98 2.17 4 3.79 1.08 2.61 .... 0.41 2.38 2.45 0.15 2.92 2.20 0.48 2:88 2.98 0.17 3.49 2.88 0.65 3.50 3.60 0.19 4.20 8.18 0.66 4.60 4.60 0.22 5.31 3.69 From American Standard for Brass or Bronze Screwed Fittings, 126 Lb. ASA B10.15-1047. All dimensions even in inches. Pipe, Fittings, Welding 683 except that the outlet face is at an angle of 90 deg from the inlet face. An angle valve takes the place of a globe valve and ari 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) 90' ELBOW C TO c TEE C to c TO C 45* ELBOW C TOC 90' STREET ELBOW 45* STREET ElBOW CTO> C TO P Standard Water Tube Size Latino Length* Tee and Elbow Centeb to External Shoulder 90-Deg Street Elbow H/ Lattng Lentgh 45-Deg Elbow J Centeb to External Shouldbb 45-Deg Street Elbow Q MH % Me H Me M Me H He Me Me Me Me ! M lM IH M m1 H 1 IH Me Me H 2 1H Vfy 3 1H 1M 3M 2 1M - Me mH in H n 4 5 2M 2M . *Me 3H IMe m 1M 4W 2M From American Standard for Cast-Brass Solder-Joint Fittings, ASA' B16.18-1950. All dimensions given in inches. 1 Not standardised for xoroughi fittings. Consnlt manufacturer for dimensions. Me Me : Me ' Me H H thrust. If the flow stops, gravity pulls the plug downward and closes the valve reversal of flow will close the valve. 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- etemuned pressure can force the valve to open and relieve the pressure'. r?s*jre regulators are used to reduce a high incoming pressure to a re quired service pressure. These valves are designed to eliminate.a fluctua10n !n the incoming pressure and thereby maintain a steady, lower service Pressure (see Chapter 20). vaj^a^e 18 contains data on the dimensions of flanged and . welding end thpVJLr* dimensions of other type valves can be. obtained by writing to Manufacturers Standardization Society of the Valve and Fitting Industry.