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ES1600 REV A.
BFMMRP4ALBF
8” – 12” SIZES
Open test cocks #2, #3, and #4 to relieve pressure from the device. Both shut-off valves must be closed.
IV.
MAINTENANCE INSTRUCTIONS - 8” – 12”
NOTE: On 10” & 12” models, the flow divider (FD) must be removed before the checks are removed. To remove the FD, remove the ¼”
nut holding it in place. Then rotate the FD 90° and lift up and out of the valve body. Pay attention to which side of the body the FD is
attached. The FD’s tab should be oriented on the same side as the cover of the relief valve body. If the relief valve needs to be turned
180°, the FD must also be rotated 180°.
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.
2. Lift off the cover. The gasket may remain on the valve body. See Figure 6. Note: The 10” & 12” valves are equipped with lifting tabs for cover lifting
only. This tab should not be used to lift the entire valve.
3. Remove the six (6) reusable locknuts for 8” valves / eight (8) nuts for 10” & 12” valves on the check seat with a 3/4” socket and ratchet.
SUGGESTION: Place a rag over the relief valve opening inside the valve body to prevent the locknuts from falling into the relief valve.
4. Slide the entire check module off the body studs and remove from body (See Figure 7).
Either check may be removed without disturbing the other (8” – 12” valves only).
