Flowserve Vogt Forged Steel Gate - Manual (Page 30)

Flow Control
Vogt Valves
30 Forged Steel Gate, Globe and Check Valves FCD VVENIM2000-02
Customer Service
If at any time you require assistance from Flowserve in the maintain-
ing of your Vogt valves, feel free to call your Customer Service
Representative, at the appropriate number listed on the back cover
of this manual. Or write us at:
Flowserve Sulphur Springs Operations
1511 Jefferson Street
Sulphur Springs, Texas 75482 USA
Or Fax us at: (903) 439-3386
Field Service
Our Sales Representatives are the best in the business. They can
provide you with technical information about your Vogt valves, and
are available to visit your facility to conduct general maintenance
seminars.
When You Call or Write
Be sure you provide the correct information and/or part numbers for
your Vogt valves. Over the years there have been design changes
due to our continuing effort make great valves even better. It is very
important that we are provided the information necessary to cor-
rectly identify your valve.
The following information, located on the valve nameplate, is
required to ensure the correct information and/or parts are provided
for your valve:
1. The valve size and series number (including any prefixes or
suffixes).
2. The valve drawing number listed on the valve nameplate.
Please note: In early 2002, our parent company changed, so the
nameplates on Vogt valves will show one of three company names:
• Henry Vogt Machine Co, Louisville, KY, or
• Edward Vogt Valve, Inc, Jeffersonville, Indiana.
• Flowserve, Inc, Sulphur Springs, TX.
5.9 Routine Inspection and
Maintenance
Once the right valve is properly installed, field maintenance is of a
generally routine nature and can be readily performed by the user.
The critical areas of a valve include the stem threads and those loca-
tions where leakage will most likely occur—the stem packing, the
bonnet joint, the seat and the end connections. It is desirable that
a maintenance program be established which will include periodic
inspection of the noted critical areas. The most common location of
a noticeable leak is at the stem seal. Leakage at the stem can usually
be stopped by adjusting the packing. If leakage cannot be stopped
by packing adjustment, repacking is indicated. However, backseating
the valve and attempting to repack under pressure is hazardous and
is not recommended. Rather than attempting to repack under pres-
sure, it is preferable to use the backseat to control the stem leakage
until a shutdown provides safe repacking conditions.
5.10 Major Field Repair
Maintenance involving rework or replacement of parts is considered
major repair. When circumstances dictate field repair of Vogt valves,
the following information is offered as an aid. It must be pointed out,
however, that valves repaired in the field are no longer under “Prod-
uct Warranty,” and in no event is Flowserve liable for any incidental
or consequential damages resulting from any cause whatsoever.
There are no warranties of any kind whatsoever, express or implied,
other than those stated in Flowserve’s limited warranty provision.
5.11 Care and Maintenance
of Vogt Forged Steel Valves
Preliminary Considerations for Valve Repair:
1. Use experienced, trained personnel.
2. Observe all standard safety precautions
3. If possible, remove valve from line so that work can be done in a
clean, well-lighted area.
4. Use genuine Vogt replacement parts.
5. Use proper tools.
6. Pressure test valve before reinstalling. This is particularly es-
sential on valves intended for critical service.
7. Remember that improper repairs can be hazardous.
Replacement Parts – How To Order
Genuine replacement parts are available for Vogt current standard
valves and can usually be shipped from stock. All parts are made
with the same careful inspection and laboratory control given original
valves and parts. Orders for replacement parts should clearly identify
the items required and should specify the correct name of the part,
valve size and series number, drawing and revision number, material,
etc. The drawing and revision number which appears on the identifi-
cation disc attached to the handwheel is of particular value.