1.
Remove the four screws holding
the first check valve cover.
2.
Lift off the first check valve cover. The
check valve inside will come out with the
cover and is attached with a bayonet type
locking arrangement.
3.
Holding the check valve module in both hands,
rotate the assembly quarter turn. This will disengage
the disc assembly, spring and seat cover into
individual components.
4.
The disc assembly may be cleaned and reassembled, or depending upon its
condition, it may be discarded and replaced with a new assembly from the
service kit. O-rings should be cleaned or replaced as necessary and lightly
greased with the FDA approved silicon grease which is also furnished with
the service kit.
5.
Reassemble the check valve module in the reverse order. Service is identical
for both the first and second check valves.
Cover
Cover
O-ring
Spring
Disc
Assembly
Seat
Seat
O-ring
Note:
The springs and covers of the
first and second check valves are
not
interchangeable. The heavier spring loaded
module should be in the first check and the
lighter in the second check module.
When ordering, specify
Ordering Code Number, Kit Number
†
and Valve Size
First Check Kits
Order No.
Kit. No.
Sizes in.
mm
0887120
RK 909 CK1
3
⁄
4
– 1
20-25
0887133
RK 909 CK1
1
1
⁄
4
– 2
32-50
0887122
RK 909 CK1SS
*
3
⁄
4
– 1
20-25
0887135
RK 909 CK1SS
*
1
1
⁄
4
– 2
32-50
Kit includes:
Disc assembly, Spring, Seat, Seat o-ring, Cover o-ring
and lubricant.
*
Stainless Steel Seat.
Second Check Kits
0887121
RK 909 CK2
3
⁄
4
– 1
20-25
0887134
RK 909 CK2
1
1
⁄
4
– 2
32-50
0887123
RK 909 CK2SS
*
3
⁄
4
– 1
20-25
0887136
RK 909 CK2SS
*
1
1
⁄
4
– 2
32-50
Kit includes:
Disc assembly, Spring, Seat, Seat o-ring, Cover o-ring
and lubricant.
*
Stainless Steel Seat.
Rubber Parts for Both Checks
0887129
RK 909 RC3
3
⁄
4
– 1
20-25
0887142
RK 909 RC3
1
1
⁄
4
– 2
32-50
0887310
RK 909 RC3 HW
3
⁄
4
– 1
20-25
0887311
RK 909 RC3 HW
1
1
⁄
4
– 2
32-50
Kit includes:
Check discs, Seat o-rings, Cover o-rings and lubricant.
HW model has bronze disc.
†
Note:
1
1
⁄
4
"
– 2
"
(32-50mm) 909/909M1
share a common kit.
Complete Rubber Parts
Order No.
Kit No.
Size in.
mm
0887130
RK 909 RT
3
⁄
4
– 1
20-25
0887144
RK 909 RT
1
1
⁄
4
– 2
32-50
Kit includes:
Check discs, Seat o-rings, RV diaphragm, RV o-rings,
Piston o-rings, Cover o-rings and lubricant.
Seat Kits for One Check
0887124
RK 909 S
3
⁄
4
– 1
20-25
0887139
RK 909 S
1
1
⁄
4
– 2
32-50
0887125
RK 909 S-SS
*
3
⁄
4
– 1
20-25
0887140
RK 909 S-SS
*
1
1
⁄
4
– 2
32-50
Kit includes:
Seat, Seat o-ring and lubricant. *Stainless Steel Seat.
Cover Kits
0887127
RK 909 C1
3
⁄
4
– 1
20-25
0887128
RK 909 C2
3
⁄
4
– 1
20-25
0887132
RK 909 VC
3
⁄
4
– 1
20-25
0887137
RK 909 C4
1
1
⁄
4
– 2
32-50
0887143
RK 909 VC
1
1
⁄
4
– 2
32-50
Kit includes:
Cover, Cover o-ring and lubricant.
For other repair kits and parts send for PL-RP-BPD.
5
First Check
Second Check
Servicing First and Second Check Valves
3
/
4
" to 2" (20 to 50mm)
3
/
4
" to 2" Replacement Parts
First Check
Service Parts Kit
Second Check
Service Parts Kit
Body
Note:
No special tools
required to service
Series 909
Relief Valve
Service Parts Kit
For further details contact your local technical sales representative, see back page.
