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February 16, 2007 Check Valve 815c ~IKlNGj@ EASY RISER@ SWING CHECK VALVE MODELS E-1 & F-1 5, Inspect water seat (12), Wipe away all contaminants, dirt, and mineral deposits, Do not use solvents or abrasives. 6. Inspect cover/clapper assembly (2-11) and cover gasket (13), Test hinged clapper (8) for freedom of movement. Renew or replace damaged or worn parts as required. CAUTION: NEVER apply any lubricant to seats, gaskets, or any internal operating parts of the valve. Petroleum-based grease or oil will damage rubber components and may prevent proper op- eration, 7. When internal inspection of the Easy Rise~ Swing Check Valve is complete, perform step 6 of paragraph 11. MAINTENANCE to re-install cover/clapper assembly (2-11), 6-8. Maintenance (Refer to Figure 1) FOR THE VIKING ESFR COLD STORAGE SYSTEM, REFER TO DATA PAGE 45 a-j FOR MAINTENANCE INSTRUCTIONS. 1, Perfonn steps 1 through 5 of paragraph 1 O-A FIVE-YEAR INTERNAL INSPECTION. 2. To remove clapper rubber (9): A. Use the appropriate wrenches to loosen and remove button-head socket screw (11), hex nut (6), sealing washer (7), and rubber retainer (10). B. Remove the clapper rubber (9) for inspection. If the clapper rubber shows signs of wear, such as cracking, cuts, or excessively deep grooves where the rubber contacts the water seat, replace the rubber. 3. To re-install clapper rubber (9): A. Place the clapper rubber (9) over the center hub of the rubber retainer (10). B. Position the retainer (10) (with rubber in place) against the clapper (8) as shown in Figure 1. C, Replace and tighten the button-head socket screw (11), sealing washer (7), and hex nut (6). The sealing washer (7) must be located on the top side of the clapper (8) as shown in Figure 1. DO NOT over-tighten. 4. To remove clapper (8), and/or hinge pin (4): A. Ri:rnove the hinge pin retaining rings (5) to free the hinge pin (4) for removal. After the hinge pin (4) is removed, the clapper (8) can be removed. 5. To re-install clapper (8) and/or hinge pin (4): A. Verify that the clapper rubber (9) is in good condition and that it is properly installed. B. Position the clapper (8) with the elongated hinge holes aligned between the holes of the hinge bracket welded inside the cover (2). The system (top) side of the clapper (8) must face the direction indicated by the flow arrow stamped inside the cover (2). C. Insert the hinge pin (4) through the holes at one end of the hinge assembly. Continue to push the hinge pin (4) through the holes at the remaining end of the hinge assembly, D. Re-install the hinge pin retaining rings (5). 6. To re-install cover/clapper assembly (2-11): A. Verify that the cover gasket (13) is in position and that it is in good condition. B. Slide the cover/clapper assembly (2-11) into the Easy Rise~ Swing Check Valve so the clapper rubber (9) contacts the water seat (12). C. Replace cover screws (14). Use the appropriate wrench to cross- tighten all cover screws to the torque values shown in Table 2 for the valve used. DO NOT over- tighten. 7. AVAILABILITY The Viking Easy Rise~ Swing Check Valve is available through a network of domestic and international distributors. See the Viking Corp. Web site for closest distributor or contact The Viking Corporation. 8. GUARANTEES For details of warranty, refer to Viking's current list price schedule or contact Viking directly.