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3

6. 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 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.
The air filter should be installed before the
positioner unless the supply air is unusually
clean and dry. 

CAUTION:

On valves equipped

with air filters, the filter 
must point down for proper
performance.

Note:

In some unusual cases, air supply must

be limited to less than the previously
mentioned amount of 150psi/10.3 Bar. In this
case, a sticker found near the upper air port
on the actuator cylinder will indicate this and
an air regulator should be installed to insure
that the supply pressure does not exceed the
line pressure indicated on the sticker.

MAINTENANCE

Valve parts are subject to normal wear and
must be inspected and replaced as necessary.

Inspection and maintenance frequency
depends on the severity of service conditions.
This section contains preventive maintenance
steps which can be performed while the valve
is still in-line and, in some cases, still in
service. If a problem is suspected of being
internal, refer to the Assembly/Disassembly
section.

1. Inspect end flanges and bonnet for signs of

gasket leakage.  Tighten flange and bonnet
bolting (if required).  See Table 4

2. Check the pressure-balance sleeve, metal

bellows seal, body drain plug, etc. (if
included) for fluid leakage to the
atmosphere.

3. 

Keep valve clean and repaint areas
affected by severe oxidation 

4. Examine the valve for damage caused by

corrosive fumes or process drippings.

5. Check lubricant supply and add lubricant if

necessary.  See Table 3 for common
lubricants.

6. Packing box bolting must be slightly over

finger-tight.  Tighten only as necessary to
prevent stem leakage. 

CAUTION:

Do not over-tighten

packing. This may cause
excessive packing wear and
high stem friction, which can

Product In

s

truction Manual

Lubricant

Krytox 206

GP 460

Aeroshell
Grease 7

Garlock

Luball

Manufacturer

E.I. DuPont 

Graphite

Products Co.

Shell Oil Co. 

Garlock Inc.

Temperature Range

-5º to 550º F /

-20º to 285º

32º to 1000º F /

0º to 540º C

-100º to 300º F / 

-75º to 150º C

32º to 500º F / 

0º to 260º C

Description Applications

Fluorinated general purpose grease; handles common
liquids and gases; good lubricity in harsh mediums; non-
flammable, chemically inert; will not harm plastic or metal
parts

Graphite in petrolatum; high pressures; anti-galling,
graphite remains above 600º F/ 316º 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

Table 3: Common Lubricants

Содержание Optimux OpGL

Страница 1: ...shutoff easier to achieve Valve specifications are as follows Table 1 Specifications TABLE OF CONTENTS INTRODUCTION Scope of Manual pg 1 Description pg 1 Specifications pg 1 Safety Information pg 1 U...

Страница 2: ...uator vertical above the body 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 tempe...

Страница 3: ...the Assembly Disassembly section 1 Inspect end flanges and bonnet for signs of gasket leakage Tighten flange and bonnet bolting if required See Table 4 2 Check the pressure balance sleeve metal bellow...

Страница 4: ...ep 2 If valve is air to open apply air under piston to raise the plug off the seat before taking the valve apart 2 Take out the bonnet flange bolting which will allow for removal of the actuator bonne...

Страница 5: ...the top guide to enter Different spacer lengths allow a wide variety of packing configurations such as twin seal and vacuum pressure packing WARNING Valves with extended bonnets or metal bellows seals...

Страница 6: ...d up against the finger tight body with such force that it will not be possible to wriggle the flange If improper seating occurred the bonnet flange can be wriggled with light hand force If this occur...

Страница 7: ...positioned correctly between the bonnet and seat ring 2 Loosen the stem clamp 3 Take out the packing box bolting and yoke clamps 4 Completely unscrew the actuator off of the plug and bonnet without r...

Страница 8: ...time until it is in place Replace the stem bellows and the stem clamp 7 Reinstall the gasket and adjusting screw using a new adjusting screw gasket The adjusting screw should be tightened only to the...

Страница 9: ...points to the closed position 13 Reconnect the actuator positioner tubing supply and signal lines AIR ACTION REVERSAL Air to Open To switch the air action from air to close to air to open continue as...

Страница 10: ...No 88 Yoke Clamp Item No 76 Packing Spacer s Item Nos 94 99 Bonnet Item No 40 Bonnet Flange Item No 70 Anti Extrusion Spacer Item No 93 Adjusting Screw Gasket Item No 248 Spring Button Item No 227 Ac...

Страница 11: ...Square Packing w Lubricator Fitting Twin Square Packing w Lantern Ring Braided Wiper Rings 2 Vacuum Seal V packing Vacuum Seal Twin V packing w Lantern Ring Fugitive Emissions Packing PTG PT PTXT Liv...

Страница 12: ...12 OpGL Globe Control Valve O S O S Figure 3 Air action Configurations Air to Open Air to Close...

Страница 13: ...em No 114 Bonnet Flange Stud Item No 108 Bonnet Flange Item No 70 Figure 4 Exploded View Body Assembly NOTE Item numbers correspond directly to the valve s bill of material Refer to it for specific pa...

Страница 14: ...Screw Gasket Item No 248 Cylinder Item No 202 Serial Plate Item No 252 Stem Clamp Item No 249 Stem Clamp Bolt Item No 240 Spring Button Item No 227 Spring Item No 229 Actuator Stem Lock Nut Item No 3...

Страница 15: ...service conditions and contact factory 5 Incorrectly adjusted plug 5 Refer to steps 8 10 of Reassembling the Body section for correct plug adjustment 6 Improper flow direction 6 Refer to original spec...

Страница 16: ...ly and should not be considered certified or as a guarantee of satisfactory results by reliance thereon Nothing contained herein is to be construed as a warranty or guarantee express or implied regard...

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