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Page 6 of 7 <br />4 TECHNICAL N�. <br />ALARM CHECK VALVE 41KJWJMODEL J-1 <br />The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058 <br />Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com <br />Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com <br />Maintenance (Refer to Figure 3) <br />1. Perform steps 1 through 6 of the Five Year Internal Inspection paragraph in Section 6. <br />2. To remove clapper rubber (10): <br />a. Use the appropriate wrench to loosen and remove the button -head socket screw (12), hex nut (7), sealing washer (8), and <br />rubber retainer (11). <br />b. Remove the clapper rubber (10) for inspection. If the clapper rubber shows signs of wear such as cracking, cuts, or exces- <br />sively deep grooves where the rubber contacts the water seat, replace the rubber. <br />3. To re -install clapper rubber (10): <br />a. Place clapper rubber (10) over the center hub of the rubber retainer (11). <br />b. Position the retainer (11) (with rubber in place) against clapper (9) as shown in Figure 3. <br />c. Replace and tighten the button -head socket screw (12), sealing washer (8), and hex nut (7), as shown in Figure 3. DO NOT <br />over -tighten. <br />4. To remove the clapper (9), spring (6), and/or hinge pin (4), remove hinge pin retaining rings (5), to free the hinge pin (4) for re- <br />moval. After the hinge pin (4) is removed, the clapper (9) and spring (6) can be removed. <br />5. To re -install the clapper (9), spring (6), and/or hinge pin (4): <br />a. Verify that the clapper rubber (10) is in good condition and that it is properly installed. <br />b. Position the clapper (9) with the elongated hinge holes aligned between the holes of the hinge bracket welded inside the cover <br />(2). The system (top) side of the clapper (9) must face the direction indicated by the flow arrow stamped inside the cover (2). <br />c. Insert the hinge pin (4) through the holes at one end of the hinge assembly. Before continuing, re -install the spring (6), using <br />care to orient the spring as shown in Figure 3. Continue to push the hinge pin (4) through the holes at the remaining end of <br />the hinge assembly. <br />d. Re -install the hinge pin retaining rings (5). <br />6. To re -install cover/clapper assembly (2-12): <br />a. Verify that the cover gasket (14) is in position and that it is in good condition. <br />b. Slide the cover/clapper assembly (2-12) into the Alarm Valve so that the clapper rubber (10) contacts the grooved water <br />seat (13). <br />c. Replace cover screws (15). Use the appropriate wrench to evenly cross -tighten all screws to the torque values listed in <br />Table 2 for the valve used. DO NOT over -tighten. <br />TorqueTable 2: .. <br />Valve Size Screw Size Torque Values <br />3" (DN80) <br />3/8" - 16 H.H.0 <br />19 ft. lbs. (2.63 kg m) <br />4" (DN100) <br />3/8" - 16 H.H.0 <br />19 ft. lbs. (2.63 kg m) <br />6" (DN150) <br />Y2' - 13 H.H.0 <br />45 ft. lbs. (6.23 kg m) <br />8" (DN200) <br />5/8" - 11 H.H.0 <br />93 ft. lbs. (12.9 kg m) <br />7. To place the wet system back in service, refer to the Placing the System in Service paragraph in section 4. <br />7. AVAILABILITY <br />The Viking J-1 Alarm Check Valve is available through a network of domestic and international distributors. See the Viking Corporation <br />Web site for closest distributor or contact The Viking Corporation. <br />8. GUARANTEES <br />For details of warranty, refer to Viking's current list price schedule or contact Viking directly. <br />Table 3: Dimensions <br />BC <br />Valve Size <br />A <br />B <br />C <br />D <br />E <br />F* <br />G** <br />Form No. F_062293 18.10.18 Rev 18.1.P65 <br />