5
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ES1597 REV A.
BFMMDC4ANLBF
FIGURE 5
Spring/Seat Sub-Assembly
(first check may remain in valve
body for disc cleaning only)
B. CHECK MAINTENANCE
If only cleaning of the first check is necessary, simply remove the three (3) nuts for 2-1/2” & 3” valves/ four(4) nuts for 4” & 6” valves on the
black plastic disc retainer (See Figure 4). Remove the check handle and washer and lift the disc retainer and disc out of the body. Rinse
the disc with clean water or replace if necessary. The disc may be flipped over for a temporary repair, but should be replaced if damaged.
Replace the disc, disc retainer, washer, handle, and nuts.
Do not over tighten locknuts.
NOTE: The springs are factory installed and should not be removed or adjusted. Serious injury could occur if springs are disassembled.
IV.
MAINTENANCE INSTRUCTIONS
8” - 12” SIZES
Open test cocks #2, #3, and #4 to relieve pressure from the device. Both shut-off valves must be closed.
A. CHECK REMOVAL
Note: If the first check disc needs only to be cleaned, it is not necessary to remove the entire check module from the valve body. See
the next section, “Check Maintenance”, for disc cleaning instructions.
1. Take off the cover coupling by removing the two bolts and nuts. The gasket may remain on the valve body.
2. Lift off the cover. (See Figure 6)
3. Remove the six (6) nuts for 8” valves/ eight (8) nuts for 10” & 12” valves with a 3/4” socket and ratchet.
4. Slide the entire check module off the body studs and remove from body (see Figure 7).
FIGURE 4
2-1/2” – 6” SIZES
