Installation; I: Overhead Clearance Requirement; Ii: Common Lubricants - Flowserve Valtek Mark One Installation, Operation & Maintenance Instructions Manual

3. Contact your shipper immediately if there is shipping
damage.
4. Should any problem arise, call your representative.

Installation

1. Before installing the valve, clean the line of dirt,
welding chips, scale or other foreign material.
2. Whenever possible, the valve should be installed in
an upright position. Vertical installation permits
easier valve maintenance. This is also important for
cryogenic applications to keep the packing isolated
from the flowing medium, permitting the packing
temperature to remain close to ambient temperature.
CAUTION: Do not insulate extension bonnets
that are provided for hot or cold services.
Table I: Overhead Clearance Requirement
Valve Size Clearance
(inches) (inches)
1 3
/ , / , 1 3 / 76
2 4
1
1 / , 2 5 / 127
2
3 6 / 152
4 8 / 203
3. Be sure to provide proper overhead clearance for the
actuator to allow for disassembly of the plug from the
valve body. Refer to Table I for the necessary clear-
ance needed for valve disassembly.
4. Double-check flow direction to be sure the valve is
installed correctly. Flow direction is shown by the
Lubricant Manufacturer
Krytox 206 E.I. DuPont
GP 460 Graphite
Products Co.
Aeroshell Shell Oil Co.
Grease 7
Garlock Garlock Inc.
Luball
1-2
Valve Size Clearance
(inches) (inches)
6 10 / 254
8 13 / 330
10 14 / 356
12 15 / 381
Table II: Common Lubricants
Temperature
Range
-5° to 550° F /
-20° to 285° C
32° to 1000° F /
0° to 540° C
-100° to 300° F /
-75° to 150° C
32° to 500° F /
0° to 260° C
arrow attached to the body flange. Standard air-to-
open valves close on air failure and should be
installed so the flow tends to close the valve, except
in rare circumstances that will be clearly indicated.
Standard air-to-close valves open on air failure and
should be installed with the flow tending to open the
valve.
5. If welding the valve into the line, use extreme care to
avoid excess heat buildup in the valve.
6. If the valve has separable end flanges, the half rings
must be installed on the valve body before bolting the
valve into the line to ensure a tight connection.
WARNING: Failure to install half rings on the
valve body can cause serious personal injury.
7. Connect air supply and instrument signal (air or mA)
lines. Throttling control valves are equipped with a
valve positioner. Two connections are marked: one
for the air supply and the other for the instrument
signal. Both the actuator and the positioner are
suitable for 150 psi / 10.3 Bar air supply. An air
regulator is not required unless the supply pressure
exceeds 150 psi / 10.3 Bar. An air filter should be
installed before the positioner unless supply air is
clean and dry. All connections must be free of leaks.
CAUTION: On valves equipped with air filters, the
air filter must point down to perform properly.
NOTE: In some rare cases, the air supply must be
limited to less than 150 psi / 10.3 Bar. This is indi-
cated on a sticker found near the upper air port on the
actuator cylinder. An air regulator should be installed
to ensure the supply pressure does not exceed the
line pressure indicated on the sticker.
Description Applications
Fluorinated general purpose grease; handles common
liquids and gases; good lubricity in harsh mediums;
nonflammable, chemically inert; will not harm plastic
or metal parts
Graphite in petrolatum; high pressures; anti-galling,
graphite remains above 600° F / 316° C
Synthetic oil based; low temperature applications
General purpose molybdenum disulfide lubricant
economical; good in water, steam and common
chemicals; not good in harsh mediums where Krytox
206 is recommended
Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611