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IOM-A-Deringer 20G/20GX/30G/30GX_6-8

 

   2005 

EDP#2916000

 

© 2020 Watts

Removing Access Port Cover Plate

C

D

Removing the First Dual-action

TM

 Check Module

FLOW

C

A

A

Removing the Second Dual-action Check Module

A

Deringer 30G/30GX:  

Disassembly and Maintenance of Bypass Check Valve

A

C

B

A

1.   Using  a 

15

/

16

" socket wrench loosen all eight 

bolts on the access port cover plate (A). 

2   Remove bolts and tapered washers (B) and 

store in a safe place. Be careful not to lose 

tapered washers as the access cover will not 

seal properly without the tapered washers.

3.   Remove access port cover plate (C). Do  

not remove access port O-ring (D).

B

1.   Use  a 

15

/

16

" socket wrench to loosen the check retainer 

bolts on both sides of the valve body (A). Do not com-

pletely remove check retainer bolts from valve body. 

Loosen the bolts until the ends of the bolts are flush 

with the inner wall of the valve body (B). 

2   Insert a flathead screwdriver between the inner valve 

body and the first check module flange (C), gently push 

the first check module in the downstream direction until 

the first check module can easily be removed from the 

access port by hand.

A

A

1.   Use a 1

1

/

8

" socket wrench to loosen the check 

retainer bolts on each side of the valve body (A). Do 

not completely remove check retainer bolts from valve 

body. Loosen the bolts until the ends of the bolts are 

flush with the inner wall of the valve body (B).

2.   Insert a flathead screwdriver between the inner valve 

body and the second check module flange (C), gently 

push the second check module in the upstream 

direction until the second check module can easily 

be removed from the access port by hand.

FLOW

C

B

D

Part 1

1.   Use an adjustable wrench to rotate check cover (A)  

counterclockwise to remove.

2.   Examine cover plate O-ring (B) for damage or fouling.
3.   Remove spring (C).
4.   Remove check poppet assembly (D) and examine for damage  

or fouling.

5.   Examine seat cage, located inside the bypass check valve body,  

for damage or fouling to the sealing seat. Do not remove unless the 

seat cage is being replaced.

6.   Reverse the order of above instructions to reassemble bypass  

check valve. 

A

B

Summary of Contents for AMES Deringer 20G

Page 1: ...equired to consult the local building and plumbing codes prior to installation If the information in this manual is not consistent with local building or plumbing codes the local codes should be follo...

Page 2: ...tenance NOTE valve is still under pressure When opening test cocks water will be released Take precautions to ensure discharging water does not damage the surrounding area equipment or create an unsaf...

Page 3: ...first check module flange C gently push the first check module in the downstream direction until the first check module can easily be removed from the access port by hand A A 1 Use a 11 8 socket wrenc...

Page 4: ...A 2 Remove disk retaining washer B 3 Use a flathead screwdriver to remove the gasket from poppet cavity C 4 Install new red silicone poppet disk D 5 Reverse the order of the above instructions to rea...

Page 5: ...the order of the above instructions to reassemble check Elastomer disk must be flat in clapper H cavity before tightening disk retainer screws F Do not cross thread disk retaining screws F F G D H B C...

Page 6: ...t bind against check seat Binding retainer screws against check seat will result in permanent damage to second check modules WARNING FLOW C E A B Not Binding Binding I Installing First Dual action Che...

Page 7: ...g from one side of the valve to the other A B F C E G D Close Test Cocks and Double Check All Closing Sealing Mechanisms 1 Using the test cock wrench or a small adjustable wrench close main test cocks...

Page 8: ...st of repairing or replacing other property which is damaged if this product does not work properly other costs resulting from labor charges delays vandalism negligence fouling caused by foreign mater...

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