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Customer Service

(704) 841-6000

backflow.apollovalves.com

ES1597 REV A.

BFMMDC4ANLBF

FIGURE 1

TC: TEST COCK

CV: CHECK VALVE

The Double Check Valve (DC) device consists of two independently-acting, spring-loaded check valves. Two resilient seated

shut-off valves and four test cocks complete the assembly. Each check is designed to maintain a minimum of 1 psi across the

check during normal operation. If at any time the pressure downstream of the device increases above the supply pressure, both

check valves will close to prevent any backflow from occurring. The no flow condition is illustrated in Figure 1. To initiate flow, supply

pressure must be sufficient to open both checks and overcome friction, normally a minimum of 3 to 5 psi above the downstream pressure.

DESCRIPTION AND OPERATION

II. INSTALLATION

1. The DC must be installed in an accessible location to facilitate periodic field testing and maintenance.

2. Flush all upstream POST INDICATORPOST INDICATORng thoroughly to remove foreign matter prior to installing the device.

3. The device may be installed in the n-flow position as shown in Figure 1. Adequate clearance between the lower most portion of the device and

flood grade or floor should be provided for ease of maintenance.

4. If shut-off valves are provided separately, they should be installed with test cocks on the upstream and downstream sides of

5. The wedge of the inlet shut-off valve (as shown in Figure 1). Contact local jurisdictional authorities for local requirements.

6. After installing the assembly and with downstream or #2 shut-off valve closed, pressurize the device and bleed air through test cock #4. Then

open #2 shut-off valve.

Note: Pressures are for illustrative purposes only and are not necessarily indicative of any actual valve.

Содержание DC4AN

Страница 1: ...INSTALLATION OPERATION MAINTENANCE MANUAL 2 1 2 12 Double Check Valve Double Check Detector Assembly DC4AN DCLF4AN DCDA4AN DCDLF4AN DCDA24AN DCDA2LF4AN ES1597 IOM BFMMDC4ANLBF rev a ...

Страница 2: ...5 6 V Testing Procedures 7 Double Check Valve Detector Assembly DCDA4AN DCDALF4AN DCDA24AN DCDA2LF4AN VI Description and Operation 9 VII Installation 9 VIII Maintenance Instructions Bypass Single Check Type 2 16 IX Maintenance Instructions Bypass Double Check Type 1 27 PARTS LIST 2 1 2 6 DC DCDA Mainline 11 12 8 12 DC DCDA Mainline 13 14 2 1 2 12 DCDA2 Type 2 Bypass Single Check 15 2 1 2 12 DCDA T...

Страница 3: ...OPERATION II INSTALLATION 1 The DC must be installed in an accessible location to facilitate periodic field testing and maintenance 2 Flush all upstream POST INDICATORPOST INDICATORng thoroughly to remove foreign matter prior to installing the device 3 The device may be installed in the n flow position as shown in Figure 1 Adequate clearance between the lower most portion of the device and flood g...

Страница 4: ...ZES 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 seat 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 seat disc cleaning instructions 1 Remove the cover clamp by backing off the nut until the latch can be dis...

Страница 5: ... 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 ch...

Страница 6: ...retainer See Figure 8 Remove the check handles and washers 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...

Страница 7: ... Make sure all valves on test kit are closed Connect the high A hose to TC 2 and the low B hose to TC 3 Open TC 2 and TC 3 2 Open the high A valve and vent C valve to bleed air from high side of gauge Open low B valve to bleed air from low side of gauge Close valves A B and C on test kit 3 Connect the vent hose to TC 4 Open TC 4 4 Close shut off valve 2 The differential gauge needle should read at...

Страница 8: ...8 Customer Service 704 841 6000 www apolloflowcontrols com Apollo Flow Controls INSTALLATION OPERATION MAINTENANCE MANUAL 3 VALVE TEST KIT FIGURE 9 ...

Страница 9: ...OPERATION VII INSTALLATION 1 The DCDA must be installed in an accessible location to facilitate periodic field testing and maintenance 2 Flush all upstream POST INDICATORPOST INDICATORng thoroughly to remove foreign matter prior to installing the device 3 The device may be installed in the n flow position A clearance of 12 to 30 between the lower most portion of the device and flood grade or floor...

Страница 10: ... Customer Service 704 841 6000 www apolloflowcontrols com Apollo Flow Controls INSTALLATION OPERATION MAINTENANCE MANUAL DCDA24N TYPE 2 DCDA2LF4AN TYPE 2 DCDA4AN TYPE 1 DCDALF4AN TYPE 1 DCDA BYPASS TYPES ...

Страница 11: ...11 Customer Service 704 841 6000 backflow apollovalves com ES1597 REV A BFMMDC4ANLBF FIGURE 10 DC4AN DCLF4AN DCDA4AN DCDALF4AN MAINLINE DCDA24AN DCDA2LF4AN MAINLINE PART NUMBER DIAGRAM 2 1 2 6 ...

Страница 12: ... 00 H 3792 00 H 3793 00 21 Locknut QTY C 1900 00 3 C 2052 00 4 C 2053 00 4 22 Test Cock Cover 2 77CLF 803 A0 77CLF 804 A0 23 Plug 1 2 NPT 2 K 4594 05 24 O ring RV Port 1 D 4866 00 25 Cover RV Port 1 F 3875 00 26 Screw 3 8 16 x 63 2 B 1921 00 27 Reducer Bushing 2 K 4605 00 N A 28 Nipple 4 K 3406 00 K 3412 00 29 Elbow 90 2 K 4598 00 K 3501 00 30 Test Cock FxF 2 77CLF 103 10 77CLF 104 10 Individual p...

Страница 13: ...5 Check Module S Assy W 9856 05 W 9668 05 W 9669 05 16 Check O ring D 5171 00 D 4869 00 D 5000 00 8 Cover O ring D 4976 00 D 4870 00 D 5001 00 Note All bronze components listed are lead free LEAD FREE The wetted surfaces of this product shall contain no more than 0 25 lead by weighted average Complies with CA AB1953 VT Act 193 MD HB372 LA HB471 and Federal Public Law 111 380 10 12 ONLY REPAIR KITS...

Страница 14: ...12 00 22 Elbow 3 4 90 1 K 4599 00 23 Test Cock FxF 1 77CLF 104 10 24 Lifting Tab 2 N A E 2955 05 25 Screw 1 4 20 X 50 8 N A B 1913 00 Individual parts are only available for bulk sales Please refer to the appropriate repair kits below Note All bronze components listed are lead free LEAD FREE The wetted surfaces of this product shall contain no more than 0 25 lead by weighted average Complies with ...

Страница 15: ... 1 EA 4A 003 13 CHECK COMPLETE KIT INCLUDES ITEMS 1 9 1 EA Note All bronze components listed are lead free LEAD FREE The wetted surfaces of this product shall contain no more than 0 25 lead by weighted average Complies with CA AB1953 VT Act 193 MD HB372 LA HB471 and Federal Public Law 111 380 ITEM PART DESCRIPTION QTY 1 K 4587 06 TailPOST INDICATORece 1 2 C 1844 05 Union Nut 1 3 Q 7281 05 Body 1 4...

Страница 16: ...coat of Apollo supplied lubricant DOW 111 or equal on cap o ring 3 Install cap VIII MAINTENANCE INSTRUCTIONS BYPASS SINGLE CHECK TYPE 2 BYPASS LINE KITS SIZE METER OPTION TYPE 1 BYPASS KIT PART NO TYPE 2 BYPASS KIT PART NO 2 1 2 GALLONS PER MIN 4ALF 600 BPE 4ALF 620 BPE CUBIC FT PER MIN 4ALF 600 BPC 4ALF 620 BPC NO METER 4ALF 600 BPG 4ALF 620 BPG 3 GALLONS PER MIN 4ALF 600 BPE 4ALF 620 BPE CUBIC F...

Страница 17: ...2 Long Nipple 1 2 Street Elbow 3 ea 1 2 90 Elbow 3 4 MNPT X 1 2 FNPT Fitting 2 ea 1 2 Ball Valve with Tapped Port Note Location of Port 1 2 Tee 1 2 F X F Ball Valve with Lever Handle Test Cock Meter Nut 2 ea Meter Adapter Adjustment Joint Coupling 1 2 DCLF4A Double Check Valve 1 2 Ball Valve without Tapped Port Rubber Washer 2 ea Water Meter Adjustment Joint Nut Adjustment Joint O ring Adjustment ...

Страница 18: ...andle 1 2 Ball Valve with Tapped Port Note Location of Port 1 2 X 3 Long Nipple 1 2 Street Elbow 3 ea 1 2 X 5 Long Nipple 1 2 Coupling 2 ea 1 2 Tee 1 2 X 1 1 2 Nipple 2 ea Test Cock Meter Nut 2 ea Meter Adapter Rubber Washer 2 ea Water Meter 1 2 Ball Valve without Tapped Port 1 2 90 Elbow 3 4 MNPT X 1 2 FNPT Fitting 2 ea Adjustment Joint Coupling Adjustment Joint Nut Adjustment Joint O ring Adjust...

Страница 19: ...X 5 Long Nipple 2 ea 1 2 Coupling 2 ea 1 2 X 7 1 2 Nipple 2 ea 1 2 90 Elbow 2 ea 1 2 X 3 1 2 Long Nipple 1 2 Ball Valve with Tapped Port Note Location of Port Test Cock 3 4 MNPT X 1 2 FNPT Fitting 1 2 X 2 Long Nipple 1 2 Street Elbow 1 2 Ball Valve without Tapped Port 1 2 DCLF4A Double Check Valve Meter Nut 2 ea Meter Adapter Rubber Washer 2 ea Water Meter Adjustment Joint Coupling Adjustment Join...

Страница 20: ...tting 2 ea 1 2 X 9 Long Nipple 4 ea 1 2 X 5 Long Nipple 1 2 X 5 1 2 Long Nipple 1 2 90 Elbow 4 ea 1 2 Ball Valve with Tapped Port Note Location of Port Test Cock Meter Nut 2 ea Meter Adapter Rubber Washer 2 ea Water Meter Adjustment Joint Coupling 1 2 DCLF4A Double Check Valve 1 2 Ball Valve without Tapped Port 1 2 X 2 Nipple 2 ea Adjustment Joint Nut Adjustment Joint O ring Adjustment Joint Coupl...

Страница 21: ...OMPONENTS AS SHOWN 1 2 X 2 Nipple 1 2 X 2 Nipple 3 4 X 1 2 F X F Reducer Bushing 2 ea 1 2 Ball Valve with Tapped Port Note Location of Port 1 2 Ball Valve without Tapped Port 1 2 Street Elbow 2 ea Meter Nut 2 ea Meter Adapter 1 35 Long Water Meter Rubber Washer 2 ea Meter Adapter 2 75 Long 1 2 Coupling 1 2 DCLF4A Double Check Valve Test Cock BYPASS KITS ...

Страница 22: ... X 3 4 X 1 2 Tee 3 4 F X F Ball Valve with Lever Handle 1 2 Close Nipple 1 2 Ball Valve with Tapped Port Note Location of Port Test Cock 1 2 X 3 Long Nipple 3 4 X 1 2 F X F Reducer Bushing 1 2 Street Elbow 1 2 Ball Valve without Tapped Port 1 2 DCLF4A Double Check Valve Adjustment Joint Retainer Adjustment Joint Nut Adjustment Joint O ring Adjustment Joint Adapter Rubber Washer 2 ea Water Meter Me...

Страница 23: ...Ball Valve 1 2 X 1 1 2 Long Nipple 3 4 Male NPT X 1 2 Female NPT Fitting 3 4 Male NPT X 1 2 Female NPT Fitting 1 2 Close Nipple 1 Long 1 2 Union Ball Valve 1 2 Close Nipple 1 Long 1 2 90 Elbow 1 2 X 9 Long Nipple 1 2 Single Check Valve Rubber Washer 2 Water Meter Adjustment Joint Adapter Adjustment Joint O ring Meter Nut Adjustment Joint Nut Adjustment Joint Retainer Test Cock 1 2 X 2 Long Nipple ...

Страница 24: ...1 2 Coupling 1 2 Street Elbow 1 2 Union Ball Valve 1 2 Close Nipple 1 Long 3 4 Male NPT X 1 2 Female NPT Fitting Test Cock Test Cock 1 2 X 6 Long Nipple 1 2 Ball Valve with Tapped Port Note Location of Port 1 2 Street Elbow 1 2 X 6 1 2 Long Nipple Adjustment Joint Retainer Adjustment Joint Nut Adjustment Joint Adapter Adjustment Joint O ring Water Meter Rubber Washer 2 1 2 Single Check Valve 1 2 X...

Страница 25: ...th Tapped Port Note Location of Port 1 2 Ball Valve Without Tapped Port Test Cock 1 2 Close Nipple 1 Long 1 2 90 Elbow 1 2 X 3 Nipple 1 2 Coupling Meter Nut Meter Adapter Water Meter Rubber Washer 2 1 2 Single Check Valve 1 2 X 3 Nipple 1 2 X 2 Nipple 1 2 X 3 Nipple 1 2 X 2 Nipple 1 2 X 90 Elbow 1 2 X 90 Elbow 3 4 X 1 2 Reducer Bushing APPLY TEFLON TAPE TO PIPE THREADS AND INSTALL COMPONENTS AS SH...

Страница 26: ...f Port Test Cock 1 2 X 3 Long Nipple 1 2 X 90 Elbow 1 2 X 3 1 2 Nipple Adjustment Joint Retainer Adjustment Joint Nut Adjustment Joint Adapter Adjustment Joint O ring Meter Nut 1 2 Single Check Valve Rubber Washer 2 Water Meter 1 2 X 3 1 2 Long Nipple 1 2 Ball Valve Without Tapped Port 1 2 X 3 Long Nipple 1 2 X 90 Elbow 1 2 X 3 Long Nipple 1 2 X 3 1 2 Long Nipple 1 2 X 90 Elbow 3 4 X 1 2 Reducer B...

Страница 27: ...or any damage or excessive wear and thoroughly rinsed in clean water prior to reassembly Replace worn parts as necessary C ASSEMBLY CHECK VALVE POPPET 1 Install new or cleaned disc in poppet and secure with washer and screw D ASSEMBLY CHECK VALVE MODULE 1 If the check seat was removed install the new o ring and lubricate Line up the seat with the bore and push it firmly into place 2 Place and cent...

Страница 28: ...IPTION QTY 1 Q 6869 05 Body 1 2 I 9024 00 Nameplate 1 3 I 2614 00 Nameplate Tack 2 4 78LF 292 01 Test Cock 3 5 F 3846 05 Cap 2 6 D 4881 00 Cap O ring 2 7 D 4880 00 Check O ring 2 8 W 9075 05 Check Module 2 9 L 7815 00 Check Seat 1 10 B 3279 00 Screw 1 11 E 2372 00 Disc retaining Washer 1 12 D 4771 00 Seat Disc 1 13 K 4491 00 Poppet 1 14 A 2505 00 Spring 1 15 L 7814 00 Spring Retainer 1 W978705 DOU...

Страница 29: ... 00 E 2922 00 C 2640 00 014 MONITORED BFV X FLANGE POST INDICATOR W 5245 00 W 5311 00 E 2922 00 C 2640 00 016 FLANGE POST INDICATOR X GROOVE OS Y W 5311 00 W 5283 00 E 2922 00 C 2640 00 017 GROOVE OS Y X GROOVE POST INDICATOR W 5283 00 W 9370 00 E 2922 00 C 2640 00 018 MONITORED BFV X GROOVE POST INDICATOR W 5245 00 W 9370 00 E 2922 00 C 2640 00 019 FLANGE POST INDICATOR X FLANGE OS Y W 5311 00 W ...

Страница 30: ...T INDICATOR W 5285 00 W 9372 00 E 2923 00 C 2641 00 018 MONITORED BFV X GROOVE POST INDICATOR W 5247 00 W 9372 00 E 2923 00 C 2641 00 019 FLANGE POST INDICATOR X FLANGE OS Y W 5313 00 W 4736 00 E 2923 00 C 2641 00 020 SHUT OFF VALVE OPTIONS 8 ASSEMBLY DESCRIPTION INLET X OUTLET INLET OUTLET POST PLATE OPERATING NUT SUFFIX FLANGE NRS X FLANGE NRS W 5314 00 W 5314 00 N A N A 02 FLANGE OS Y X FLANGE ...

Страница 31: ...2643 00 010 GROOVE NRS X GROOVE NRS W 2341 00 W 2341 00 N A N A 011 FLANGE NRS X GROOVE NRS W 5315 00 W 2341 00 N A N A 012 FLANGE POST INDICATOR X MONITORED BFV W 5315 00 W 5249 00 E 2925 00 C 2643 00 013 FLANGE POST INDICATOR X FLANGE POST INDICATOR W 5315 00 W 5315 00 E 2925 00 C 2643 00 014 MONITORED BFV X FLANGE POST INDICATOR W 5249 00 W 5315 00 E 2925 00 C 2643 00 016 FLANGE POST INDICATOR ...

Страница 32: ...LBF rev a 8 17 www apolloflowcontrols com Regional Management List now available online at http conbra co rmlist Phone 704 841 6000 Fax 704 841 6020 Check our website for the most up to date information on all our products ...

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