1900 Series - Maintenance Manual

XII. Reassembly (Contd.)Table 10: Bonnet Nut Torque (Contd.)Orifice 1920 1921 1922 1923 1924 1926 1928Std. UM ft lb Nm ft lb Nm ft lb Nm ft lb Nm ft lb Nm ft lb Nm ft lb NmD-2 D 55 75 ---- ---- 55 75 ---- ---- 60 81 60 81 115 156E-2 E 55 75 ---- ---- 55 75 ---- ---- 60 81 60 81 115 156F F 55 75 ---- ---- 55 75 ---- ---- 70 95 70 95 115 156G G 55 75 ---- ---- 60 81 ---- ---- 70 95 70 95 75 102H H 60 81 ---- ---- 60 81 ---- ---- 75 102 85 115 ---- ----J J 75 102 ---- ---- 75 102 ---- ---- 100 136 100 136 ---- ----K K 60 81 ---- ---- 60 81 ---- ---- 60 81 140 190 ---- ----L L 90 122 ---- ---- 90 122 ---- ---- 140 190 140 190 ---- ----M M 90 122 ---- ---- 95 129 ---- ---- 95 129 ---- ---- ---- ----N N 130 176 ---- ---- 85 115 ---- ---- 85 115 ---- ---- ---- ----P P 145 197 ---- ---- ---- ---- 125 169 125 169 ---- ---- ---- ----Q Q 105 142 ---- ---- 150 203 ---- ---- ---- ---- ---- ---- ---- ----R R 115 156 ---- ---- 135 183 ---- ---- ---- ---- ---- ---- ---- ----T-4 T 125 169 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----U U 125 169 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----V V 130 176 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----W W 130 176 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----• For V and W orifices, use the setting deviceto assemble the spring plunger and adjustingscrew. Contact the factory for procedure on howto use the setting device.21. Use pliers to hold the spindle (15) and prevent itfrom turning in the disc holder (8). Turn the adjustingnot known, verify the number of notches on theadjusting ring (3) and refer to Tables 12, 13, 14or 15 depending on the valve serial number or trim.Set the ring position according to the applicable setpressure and orifice size.The valve is now ready for setting and testing.screw (19) clockwise until the original distancebetween the end of the spindle and the top of1the adjusting screw is obtained. This method of3 136compressing the spring (18) will approximately46reestablish the original set pressure. The valve mustHolesHoles5still be reset for the required pressure.2 4422. Restore the adjusting ring (3) to its original position,2with reference to the disc holder (8), as recorded.5 15 123. Fit the adjusting ring pin (4) with a new adjusting97ring pin gasket (5).38 31181224. Install the adjusting ring pin (4) in the valve assemblyHoles12 Holes 474in the original position. If the original position is8 102 62 6Table 11: Torque Required for Each Round of135 1 7Pattern17 15920Round Percentage of Required Torque3 20 121 Wrench Tight11 Holes 4102 251916 183 608 2 6144 1005 100Figure 37: Bolt Tightening Patterns