Sheet 7216/7218/7219A/7349A Page 2
one gas diaphragm disc (15) with the beveled edge away from the body (23). Slide the gas diaphragm (14) over the stem (A) with the curves away from the body (23). Place the remaining gas diaphragm disc (13) over the gas diaphragm (14), with the beveled side facing the diaphragm. Assemble the "O" ring (12), then the sealing washer (11) with the countersink toward the "O" ring (12). Tighten the locking nut (10) to 10 in.-lb torque while holding the stem steady with an Allen wrench inserted into the top of the stem assembly (A) or hold the hex portion of the stem through the body port with a box wrench. Then fasten the hook eye nut (9) to the stem (A) (7216 only). Step Four: If upgrading a -5 through -7 size regulator, fasten the spring housing (6) and gasket (7) onto the new gas diaphragm cover (8). Attach one end of the spring (5) to the hook eye nut (9) and feed the other end into the spring cartridge (4) through the gas diaphragm cover (8) (7216 only). Insert the spring (5) into the spring housing (6) (7218 only). Align the impulse tap in the gas diaphragm cover (8) with the inlet of the body (23) and fasten the gas diaphragm cover (8) to the gas diaphragm case (19). Use a hook to pull the spring (5) through the spring cartridge (4), attach it to the spring eye (2) and the washer (3), and replace the spring cartridge cap (1) (7216 only) or adjusting screw cap (7349A only). Step Five: Discard the old body plug/cover (25), body cover gasket (24), valve stem assembly (22), both diaphragms (14 and 20), both gas diaphragm washers (13 and 15), both balancing diaphragm discs (18 and 21), the "O" ring (12) and sealing washer (11), locking nut (10), and hook eye nut (9) (7216 only). If the repair/upgrade kit includes a spring (5), discard the old spring. If upgrading an old style -5 through -7 size regulator, discard the old gas diaphragm cover (8) and spring housing gasket (7). T he -K model regulators with no brass internals are no longer available or required, due to a material change in the new style regulators. The new models come standard with no brass wetted parts, making the -K models obsolete. A standard repair kit or upgrade kit will be used to repair or upgrade old -K models. NOTE:
ASSEMBLY: Step One: Wipe the gasket sealant from the body (23), the body plug (25) (-01 through -4 sizes only), and the gas diaphragm case (19) with an alcohol based solvent before reassembling. Insert the valve stem assembly (22) into the body plug/cover (25) and place one of the balancing diaphragm discs (21) on the stem (A) with the beveled side toward the threading. Step Two: With the cup facing upwards push the balancing diaphragm (20) over the stem (22) gently and line all holes up with the body (23). Once balancing diaphragm (20) is in place use your fingers and gently push the top of the cone down the stem (22) until the top of the cone is level with the body (23) face (see figure 2). The balancing diaphragm (20) should dip into the body (23). Place the gas diaphragm case (19) over the balanc- ing diaphragm (20)and align all holes. The adapter pin (17) must be aligned with the outlet ofthe body (23) (-01 through -3 sizes only). Fasten the gas diaphragm (19) to the body (23). Step Three: Place the remaining balancing diaphragm disc (18) over the valve stem (A) with the beveled side facing the balanc- ing diaphragm (20). Assemble the diaphragm spacer (16) and Step Three: If upgrading a -5 through -7 size regulator, remove thespring housing (6) and the spring housing gasket (7) from the gas diaphragm cover (8). Set aside all the old internal parts until the end of the assembly process. (19). Hold the shaft locking nut (10) and remove the hook eye nut (9). Hold the flats on the top of the stem or use an Allen wrench to prevent the stem (A) from turning, and unfasten the shaft lock- ing nut (10). Remove the sealing washer, "O" ring, gas diaphragm washers, gas diaphragm, diaphragm spacer, and balancing diaphragm disc (11 through 16 and 18). Step One B (7218, 7219A, and 7349A-01 thru -1): Carefully detach the gas diaphragm cover (8) and spring (5) from the gas diaphragm case (19). Hold the flats on the top of the stem or use an Allen wrench to prevent the stem (A) from turning, and un- fasten the shaft locking nut (10). Remove the sealing washer, "O" ring, gas diaphragm washers, gas diaphragm, diaphragm spacer, and balancing diaphragm disc (11 through 16 and 18). Step One C (7349A): On regulator sizes -2 thru -7, remove the adjusting screw cap (1) and turn the adjusting screw (2) counter- clockwise to relieve tension on the spring (5). Carefully detach the gas diaphragm cover (8) and spring (5) from the gas diaphragm case (19). Hold the flats on the top of the stem or use an Allen wrench to prevent the stem (A) from turning, and unfasten the shaft locking nut (10). Remove the sealing washer, "O" ring, gas diaphragm washers, gas diaphragm, diaphragm spacer, and balancing diaphragm disc (11 through 16 and 18). Step Two: Separate the gas diaphragm case (19) from the body (23). Be careful that the adapter pin (17) dœs not become loose or fall out (-01 through -3 only). Remove the balancing diaphragm and gasket (20) (new style regulators do not use a gasket) and the balancing diaphragm disc (21). Detach the body plug/cover (25) and the body cover gasket (24) [-5 through -7 only]. Remove the valve stem assembly (22).
Figure 2. Installation of the balancing diaphragm
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