Watts TK-DL - Manual (Page 6)

6
Nicholson Labs
1423 Queen City Ave.
Cincinnati, OH 45214
Tel: (513) 251-8378
Fax: (513) 251-4388 BAVCO
20435 S. Susana Road
Long Beach, CA 90810-1136
Tel: (310) 639-5231
Fax: (310) 639-0721
SYMPTOM CAUSE SOLUTION
1. Check valve fails to hold a. Debris on check disc Disassemble and clean
1.0 PSID minimum sealing surface
b. Leaking gate valve Disassemble and clean or repair
c. Damaged seat disc or Disassemble and replace
seat o-ring
d. Damaged guide holding Disassemble clean or replace
check open
e. Weak or broken spring Disassemble and replace spring
2. Chatter during flow a. Worn, damaged or Disassemble and repair or
conditions defective guide replace guide
3. Low flows passing a. Mainline check fouled Disassemble and clean
through mainline
valve
b. Meter strainer plugged Disassemble and clean
c. Damaged mainline seat Disassemble and replace
disc or seat
d. Broken mainline spring Disassemble and replace
Calibration Centers
Troubleshooting Guide
Double Check Valve Assemblies