Kenco Engineering KDV DumpValve - Manual (Page 2)

INSTALLATION OF KDV SERIES DUMP VALVE
1. Prior to valve installation, inspect the unit for damage from shipping. Inspect the inlet (process
connection) and drain to ensure no foreign material or debris is present.
2. Install valve using good piping practice. Use an appropriate pipe sealant on all NPT threads.
3. Make sure drain is facing down. Also make sure the vent plug is positioned at the bottom of the
valve before tightening the union nut. If necessary, the union nut can be loosened to orient the
diaphragm housing in the proper position. Be sure to tighten the union nut up firmly before
putting the valve into service or leaking may result.
4. Connect the 30 to 70 psi pneumatic input signal to the valve actuation port. Always use clean,
dry instrument quality air or gas.
5. To ease assembly and maintenance, plumb a union connection between the valve drain port and
the condensate/drain line of the pressure vessel. Kenco also recommends a manual 2-way shut
off valve installed in the process vessel at a level below the dump valve. The outlet on the
manual valve should be connected to the condensate/drain line.
TROUBLESHOOTING
Problem Possible Cause Solution
Valve leaks when closed. 1. Debris between plug and
seat.
2. Plug and/or seat worn
3. Union nut not tight enough.
4. Crush washer excessively
worn.
5. Maintenance bolt is screwed
in too far, pushing the trim
plug off of the trim seat
1. Remove debris.
2. Replace trim plug and seat.
3. Tighten union nut.
4. Replace crush washer.
5. Unscrew the maintenance
bolt until the trim plug is
fully seated against the trim
seat.
Valve will not open. Pressure drop across valve too
great. 1. Increase pneumatic input
signal to 70 psi.
2. Make sure process pressure is
not higher than KDV-Dump
Valve rating.
Air/gas leaking from diaphragm
housing. 1. Diaphragm damaged. 1. Replace diaphragm.
WARNING!
Always make sure the process pressure is fully relieved, or zero before doing any
maintenance or assembly/disassembly to the valve!
MAINTENANCE AND REPAIR PROCEDURES
PREVENTATIVE MAINTENANCE
1. Inspect Trim Plug and Trim Seat for wear every 6 months.
2. Inspect Diaphragm, Thrust Plate and Trim Shaft for wear or damage once a year.