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Related Manuals for CLA-VAL RP-4
Summary of Contents for CLA-VAL RP-4
- Page 1 Model RP-4 4”, 6” & 8”...
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Page 2: Product Overview
Product Overview RP-4V (1990-2005) Utilized the 3084 Toggle Lever Checks and CDHS-24 relief valve. It was produced in 4”, 6” and 8” sizes only The 4V was a vertically oriented RPA. Replacement hardware parts were discontinued in 2005. Only repair kits with rubber parts are available. - Page 3 Check Cover Removal The check covers are secured by bolts and sealed by an o-ring. 4” and 6” sizes remove all but two cover bolts, leaving two bolts 180 degrees apart. Press down on the cover while removing the last two bolts to prevent the cover from being forcibly ejected by the spring.
- Page 4 Check Valve Removal Remove the two pipe plugs on each side of the valve body, to expose the lever arm pin (item 13) and the hinge pin (item 11). Using a brass rod (smaller in diameter than the pins), gently tap out the rear lever arm (item 13) pin first.
- Page 5 Check Valve Removal Grasp the yoke (item 7) with one hand, while removing the front hinge pin (item 11). Lift out the toggle- lever clapper assembly, being careful that the brass seat is not dented. NOTE: On 8” & 10” sizes, a lever arm spacer (item 26) is installed between the two lever arms to maintain proper...
- Page 6 Check Valve Disassembly 4” through 8” sizes remove the retaining bolt (item 23) from the center of the disc guide. The check disc is free once the guide is separated from the disc retainer (item 4). NOTE: An o-ring (item 20) is installed on the retaining bolts for sizes 21/2”, 3”, 4”, 6”, and 8”.
- Page 7 Check Seat Service Check seats are o-ring sealed and pressed into the body. Replacement seats are no longer in production. Very fine nicks on the seating edge can be restored by slowly working 400 wet or dry sandpaper back and forth on both sides (top and inner throat) of the seat.
- Page 8 Check Disc Replacement When installing a new check disc, fiber spacer washers between the retainer and guide MAY or MAY NOT be required. Fiber spacer washers (item 33) are installed to ensure the proper “squeeze” on the disc (item 6). Too many washers will not allow sufficient squeeze on the disc (not a water tight seal).
- Page 9 Check Valve Alignment Re-install clapper assembly. Be careful not to damage check seat. Support clapper assembly with one hand and install hinge pin. With clapper assembly supported by hinge pin only, exert pressure to force disc against the seat, and leave an imprint of the seat in the disc.
- Page 10 Check Valve Alignment In the event the seat imprint indicates an incorrect alignment, adjust hinge pin bushing OUT, on the side that corresponds to the least distance between the seat imprint and disc guide. In this figure, adjust hinge pin bushing on the RIGHT side outward.
- Page 11 Check Reassembly Notes When the two pins that hold the toggle-lever (clapper) assembly are installed, be sure to note that the yoke (item 7) and the lever arm pivots upward freely.
- Page 12 Relief Valve Cover Removal The CDHS-20/ CDHS-24 RV has two covers. The bellofram cover (item 3) and the intermediate body or “diaphragm cover” (item 2). The bellofram cover (item 3) is located on top of the RV assembly. The bellofram cover is secured by screws and sealed by the bellofram.
- Page 13 Relief Valve Cover Removal The intermediate body (item 2) is secured by cap screws and sealed by the diaphragm. There is a slight spring load on this cover, so exert pressure downward on the cover as the cap screws are removed. The RV stem assembly is mounted through the intermediate body.
- Page 14 Disassemble RV Stem The stem is secured by the upper and lower stem nuts (item 16). Remove the upper stem nut first. The bellofram, piston and retainer can now be removed from the upper stem. Remove the stem along with the diaphragm and disc from the body.
- Page 15 Disassemble RV Stem Remove lower stem nut (item 16). The RV disc (9), disc retainer (8), and guide (10) are removed as one assembly.(Simply pry disc from retainer) Remove the diaphragm (item13), the lower stem o-ring (item 15) and washer (item 7) from stem.
- Page 16 RV Seat Service The RV seat is o-ring sealed and threaded into the main RV body. Replacement seats are no longer in production. Very fine nicks on the seating edge can be restored by slowly working 400 wet or dry sandpaper back and forth on both sides (top and inner throat) of the seat.
- Page 17 Diaphragm Reassembly Reassemble the diaphragm (item 13), lower stem o-ring (item 15) and washer (item 7) on the lower stem (4). Reassemble the RV disc, disc retainer, and guide as one assembly on the lower stem. The serrated area of the disc retainer (8) is positioned against the diaphragm.
- Page 18 Upper Stem Reassembly Reassemble the bellofram (12), piston (5), retainer (6) and stem o-ring (15) on the upper stem and replace stem nut. Position the retainer (6) with its outer lip facing up. Position the bellofram with the glossy side against the retainer(6). The fabric side against the piston(5) Position the piston (5) with the recess around the stem hole facing down...
- Page 19 Intermediate Body Reassembly Position the RV spring over the seat in the main body. Insert cap screws through intermediate body and diaphragm. Make sure the sensing passage is aligned properly. Press the intermediate body down on the main body and start cap screws.
- Page 20 Bellofram Reassembly Carefully push bellofram(12) “brim” straight down over itself so that the “brim” is flat and smooth against the intermediate body. Make sure the bellofram is not twisted or wrinkled. Install cover (3) so that weep hole faces out away from backflow.
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