774 DCDA 21/2”-12”.

Slides:

Advertisements

Similar presentations

RP-500 ½- 1. Modification Overview Production of the RP500 began in 2007 and is current. Production of the RP500 began in 2007 and is current.

Advertisements

RP4A 2½ – 6. Modification Overview Production of the RP4A series began in Production of the RP4A series began in A Lead free version (4ALF)

RP4AN 21/2 – 6. Modification Overview Production of the RP4AN series began in Production of the RP4AN series began in The 4AN indicates an.

¾”-2”. Modification Overview  Production of the series began in 1989 and is current.  Early models of ¾”-2” series did not always.

RPDA 4A 2½” – 6”. Modification Overview  Production of the RPDA 4A series began in  The RPDA 4A can utilize either a Type I or Type II bypass.

860 (LF), 880 ½”- 2” 860 (LF), 880 ½”- 2”. Modification Overview  Production of the ½ - 2” 860 series began in 1997 and is current.  The 880 is an “N”

860 21/2”-10”. Modification Overview  Production of the 2½” – 10 sizes began in  Lead free version (LF860) was introduced in Parts do not.

994 RPDA 21/2”- 6”. Modification Overview  Production of the 994RPDA began in 1999 and is current.  The 994 RPDA currently utilizes the ¾” 009M3 for.

350, 350A 2½”-12”. Modification Overview  Production of the 2½ - 10” sizes began in  Production of the “A” models began in This Indicates.

975, 975XL ¾”-2” 975, 975XL ¾”-2”. Modification Overview  Production of the original 975 began in This version had buna-n check discs and did not.

975DA 2½”-10”. Modification Overview  Production of the 975DA began in 1993 and was discontinued in  The 975DA uses a ¾” 975XL for the bypass.

994 2½ ”- 10”. Modification Overview  Production for the 994 began in 1999 and is current.

806, 806YD 3”-10”. Modification Overview  806- ( ) Cast Iron body- Threaded in seats- Internal check parts are epoxy coated iron.  806YD- (1988-present)

LF866 2½”-10”. Product Overview  Production of the 2½” – 10” sizes began in  The LF866 utilizes a Type 2 bypass (Model LF619 single check).

4V-500 ½”-2”. Modification Overview  Production of the 4V-500 PVB began in  The 4V utilizes a float assembly that contains a relief valve that.

½”-10”. Modification Overview  Production of the series began in 1989 and is current.

4S-100, 4SG-100 2½”-10”. Modification Overview  Production of the 4S-100 aka (DC4S) began in  The 4SG-100 was introduced in The “G” indicates.

RPZ 2½”- 10” RPZ 2½”- 10”. Modification Overview  Production of the RPZ in sizes 2½ - 10” began in 1993 and is current.

5000CIV 21/2”-10” 5000CIV 21/2”-10”. Modification Overview  Production of the 5000CIV (Watts 909RPDA) began in 1998 and is current.  The 5000CIV utilizes.

RPZ, RPZE ½”-2”. Modification Overview  Production of the model RPZ began in  The lead free version ( RPZE ) was introduced in 2002 and is current.

450 4”-10”. Modification Overview  Production of the 4” - 10” sizes began in  The lead free version (XL) was introduced in 2011.

774X DCDA 21/2”, 6”, 8” 774X DCDA 21/2”, 6”, 8”. Modification Overview  Production began in  The 2 ½” 774X DCDA was discontinued in  The.

826YD 21/2”-10”.

009 2½”-3”.

RP4A (LF) ½”-2”.

720A ½”-2”.

774X 21/2”, 6”, 8”.

RPDA 4AN 21/2” – 6”.

2000SS 2½”-12”.

DCDA4A 21/2” – 6”.

DCDA4AN 2½” – 6”.

830, 831 4”- 6”.

805Y, 805YD 21/2”-10”.

DCV, DCVE ½”-2”.

007DCDA 2½”-3”.

806, 806YD 3”-10”.

450 2½”- 3”.

RPZ-II, RPZE-II ½” , ¾” , 1½”.

909 3/4”-2”.

4000B (M3) ½”-2”.

5000SS 21/2”- 6”.

850 2½”-10”.

4D-100, 4D-600 2½”- 10”.

DC-500 ½”- 1”.

LF856 2½”-10”.

350, 350XL ¾”- 1”.

850 (LF) ½”- 2”.

950, 950XL, 950XLT ¾”-2”.

2000SS 2½”-12”.

880V 21/2”-10”.

975 2½”-10”.

774 2½”-12”.

3000SE 21/2”, 6”, 8”.

375DA 2½”-10”.

919 ¾”-2”.

950DA 21/2”-10”.

007DCDA 2½”-3”.

757DCDA, 757N DCDA (21/2”–10”) 757A DCDA (21/2”- 6”)

856 2½”-10”.

2000B (M3) ½”-2”.

450DA 4”-10”.

Presentation transcript:

774 DCDA 21/2”-12”

Modification Overview Production began in 1998 and is current. The 774 DCDA currently utilizes a ¾” 007M3 bypass assembly.

Single Access Cover Removal Cover is secured by a grooved coupling. Cover has no spring load.

Check Valve Removal Check valve modules called “Cam Checks”. Checks are o-ring sealed. 21/2”-6” Cam Checks are threaded into body. #1 Check must be removed before #2 can be removed. 8-10” Checks are simply bolted into body.

Check Valve Removal 21/2-6” cam checks unscrew counterclockwise by hand “if possible”. *Do not use cam arm as a handle to unscrew.

Check Valve Removal 21/2-6” Cam Checks. If too tight, place a drift punch or solid rod (long screwdriver) in one of the holes on the outer edge of the check module. Tap with hammer in correct direction (counterclockwise) to loosen.

Check Valve Removal Notes 21/2-6” Cam Checks. There are “special tools” available to help remove check modules.

Check Seat Removal Check seats are part of each module and can not be removed. If the seat is damaged, the complete check module will need to be replaced.

Check Disc Inspection 21/2-6” Cam Check disc assembly is part of the module and can not be removed. For inspection and cleaning 21/2 -4”, lift the cam arm and hold in open position. *Raise the clapper so that the end of the cam arm rests between the roller and clapper.

Check Disc Inspection For inspection and cleaning of the 6”size only. Locate the stud on the outlet flange of the assembly. Place the cam arm hole on the stud and open the check valve so that the cam rests between the roller and clapper.

Check Valve Reassembly Notes Change and lubricate check o-ring. Install #2 check first then #1 check. # 2 check should be tightened with a long screwdriver. Tighten #1 check firmly by hand only. Lubricate the outside edge of the groove coupler gasket.

Check Disc Replacement 8”-12” Using the torsion handle, place on the end of the torsion spring and move away from and around the retaining bracket. ** Hold handle firmly, high spring tension. This will free the cam arm and clapper.

Check Disc Replacement 8”-12” Using the retainer wrench, unscrew the disc retainer counterclockwise. Once the disc retainer has been removed, the check disc is free.