Install Instructions
5
1. Remove hatch cover bolts. NOTE: The 709 is designed so that,
when the bolts are backed off
1
⁄2", all the spring load is released
f r o m t h e c o v e r a n d r e t a i n e d b y t h e c h e c k m o d u l e .
CAUTION: Be sure to verify this before removing all the bolts.
2. Lift check valve module straight out, taking care not to hit and
damage seat ring.
3. The seat ring may be removed and replaced by pulling out the two
wire retainers. The wire retainers are 10" long. One is drawn out
clockwise and the other is drawn out counterclockwise.
4. With the retainer wires removed, the seat ring can be lifted straight
up and removed.
CAUTION: The check valve disc and spring assembly are in
compression. The spring load is captured by the two spring retainers
and the stem The spring retainers are not to be removed for servicing.
If there is a need to replace the spring, spring retainer or stem, replace
the disc and spring assembly. If the disc holder has been damaged
by freezing or severe water hammer, it can be replaced in the field.
Remove the disc holder retaining ring and slide the disc holder off the
stem. Remover the o-ring from the stem and replace with a new one.
Apply grease to the o-ring and slide the new disc holder into place. Re-
install the retaining ring. NOTE: The disc holder should not be removed
when servicing only the disc, remove allen head screws holding the
disc retaining plate and replace disc.
709 2
1
⁄2" – 10" (65-250mm)
EDP No. Kit No. Size
First or Second Check Kits in mm
0887900 RK 709 CK4 2
1
⁄2 – 3 65-80
0887901 RK 709 CK4 4 100
0887902 RK 709 CK4 6 150
0887903 RK 709 CK4 8 200
0887904 RK 709 CK4 10 300
Kit includes: Disc & spring assembly and Cover O-ring.
Rubber Parts (for one check)
0887905 RK 709 RC4 2
1
⁄2 – 3 65-80
0887906 RK 709 RC4 4 100
0887907 RK 709 RC4 6 150
0887908 RK 709 RC4 8 200
0887909 RK 709 RC4 10 250
Kit includes: Disc and Cover O-ring.
Complete Rubber Parts
0887915 RK 709 RT 2
1
⁄2 – 3 65-80
0887916 RK 709 RT 4 100
0887917 RK 709 RT 6 150
0887918 RK 709 RT 8 200
0887919 RK 709 RT 10 250
Kit includes: Two discs and Two Cover O-rings.
Seat Kits
0887910 RK 709S 2
1
⁄2 – 3 65-80
0887911 RK 709S 4 100
0887912 RK 709S 6 150
0887913 RK 709S 8 200
0887914 RK 709S 10 250
Kit includes: Seat, Seat o-ring, Retainer Wire and Cover O-ring.
Cover Kits
0887920 RK 709 C 2
1
⁄2 – 3 65-80
0887921 RK 709 C 4 100
0887922 RK 709 C 6 150
0887923 RK 709 C 8 200
0887924 RK 709 C 10 250
Kit includes: Cover and Cover O-ring.
709DCDA 3" – 10" (80-250mm)
EDP No. Kit. No. Size
First Check Kits in mm
0887930 RK 709DCDA CK1 3 80
0887931 RK 709DCDA CK1 4 100
0887932 RK 709DCDA CK1 6 150
0887933 RK 709DCDA CK1 8 200
0887934 RK 709DCDA CK1 10 250
Second Check Kits
0887935 RK 709DCDA CK2 3 80
0887936 RK 709DCDA CK2 4 100
0887937 RK 709DCDA CK2 6 150
0887938 RK 709DCDA CK2 8 200
0887939 RK 709DCDA CK2 10 250
Kit includes: Disc assembly, Spring assembly and Cover O-ring.
Rubber Parts (for one check)
0887940 RK 709DCDA RC4 3 80
0887941 RK 709DCDA RC4 4 100
0887942 RK 709DCDA RC4 6 150
0887943 RK 709DCDA RC4 8 200
0887944 RK 709DCDA RC4 10 250
Kit includes: Disc and Cover O-ring.
Seat Kits
0887945 RK 709DCDA S 3 80
0887946 RK 709DCDA S 4 100
0887947 RK 709DCDA S 6 150
0887948 RK 709DCDA S 8 200
0887949 RK 709DCDA S 10 250
Kit includes: Seat, Retainer Wire and Cover O-ring.
Cover Kits
0887950 RK 709DCDA C 3 80
0887951 RK 709DCDA C 4 100
0887952 RK 709DCDA C 6 150
0887953 RK 709DCDA C 8 200
0887954 RK 709DCDA C 10 250
Kit includes: Cover and Cover O-ring.
Spring Retainer
(Do Not Remove)
Spring
O-ring
Spring Retainer
(Do Not Remove)
Disc
Disc Holder
Retaining Ring
Disc Retainer
Allen Head
Socket Screws
Stem
Disc Holder
*Warning: Spring assembly
is factory assembled. DO NOT
DISASSEMBLE.
2
1
⁄2", 3" (65-80mm)
4" - 10" (100-250mm)
Cover
Cover
O-ring
*Disc &
Spring
Assembly
Seat
Seat
O-ring
Retainer Wire
Seat
Second
Check
First
Check
Cover
O-ring
O-ring
Service, Replacement Parts and Maintenance 2
1
/2" – 10" (65-250mm)