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Installation & Maintenance Manual
Jul 14, 2018

Installation & Maintenance Manual

1 March 22, 2013

www.a-tcontrols.com

Engineering\documents\products\IOM\IOM8035.docx

CAUTION: 1. For your safety read this manual before installation or servicing.

2. Before installing or servicing,

please ensure the line pressure ha

s been relieved, and any

hazardous fluids have been drained or purged from the system.

3. Please do not use the valve in excess of its designed pressure and temperature ranges.

1. USE:

1.1

Maximum results and optimum valve life can be main

tained under normal service conditions and in accordance

with pressure/temperature ratings and corrosion data chart.

2. STORAGE:

If valves are not to be installed immediately, please note the following:

2.1

Valves should be stored in a dry & clean indoor space.

2.2

Check to see that the valve is in the CLOSED position

for bare shaft or manual type in order to avoid damage to

the seal. For automated package

s, the valve position will be set accordi

ng to the requirement of the actuator.

2.3

The surface of the valves should

be greased properly for protection.

2.4

Valve ports should be sealed by plastic caps to

prevent dirt from entering and damaging inner parts.

3.

INSTALLATION & OPERATION

3.1

Before installing, check all valves & mating flange

s to ensure gasket surfaces are free from defects.

3.2

Ensure all valves and lines are flushed clean without

any dirt or debris which may damage valve seals.

3.3

Check pipe alignment & appropriate supports. It is not

recommended to install valv

es to improperly positioned

pipes.

3.4

Valves are designed with a preferre

d flow direction; a flow arrow on t

he valve body indicates preferred flow

direction. Valves installed

with reversed flow direct

ion will not seal properly.

3.5

Check to see that valve is in OPEN position

to protect the Seat from damage during installation.

3.6

Install valve into pipeline and tighten bolts properly

. Note: over tightening of any side may cause leakage.

Do not overturn the Segment when

operating the valve to avoid scratching the seat. If this happens,

please follow the Disassembly & Assembly instru

ctions to remove cover and seat; then turn the

Se

g

ment back to ri

g

ht position and reassemble the valve parts.

image.png 

GENERAL MAINTENANCE

Check valve periodically to ensure the system is per

forming properly. Follow the instructions and refer

to the parts list below if it is necessary to disassemble the valve.

5. DISASSEMBLY

For Soft-Seated Type

5.1

Relieve line pressure and flush to remove any hazardous material. Allow temperature in pipeline and

valve to cool to a temperature safe for handling.

5.1.1 Remove valve from pipeline.

5.2

Turn the valve to the CLOSED position.

5.3

Loosen the Bolts (8), remove the Cap (7) and Seat (6A) from the Body (1).

5.4

Remove the Gland bolts (14) then remove the Gland (13). Remove the Lower Cover Bolts (17) and the

End Cover (5)

5.5

CAUTION: BEFORE REMOVING STEM (3) AND

SHAFT (4) INSURE THAT SEGMENT (2) IS NOT

GOING TO FALL OUT OF THE VALVE AND BE DAMAGED.

5.6

Remove Stem (3) and Shaft (4) carefully while supporting Segment (2).

5.7

Remove Gland Packing (12) being careful not to scratch or damage gland bore. Remove washers (10,

11) and Upper Thrust Bearing(9).

5.8

Remove cover gasket (16) again being careful not to scratch the surface. Remove Lower Thrust

Bearing (9) and Support (15).

5.9

Carefully clean and inspect all parts for wear and damage. Insure all gasket and packing residue is

thoroughly cleaned before valve is reassembled. All soft parts should be replaced.

For Metal-Seated Type

5.10 Relieve line pressure and flush to remove any hazardous material. Allow temperature in pipeline and

valve to cool to a temperature safe for handling.

5.11 Turn the valve to the CLOSED position.

5.12 Remove valve from pipeline.

5.13 Loosen the Bolts (8), remove the Cap (7), Spring (6F), Seat Gland (6E), Packing (6D), and Seat

Support (6B) from Body (1).

5.14 Remove the Gland bolts (14) then remove the Gland (13). Remove the Lower Cover Bolts (17) and the

End Cover (5)

5.15 CAUTION: BEFORE REMOVING STEM (3) AND

SHAFT (4) INSURE THAT SEGMENT (2) IS NOT

GOING TO FALL OUT OF THE VALVE AND BE DAMAGED.

5.16 Remove Stem (3) and Shaft (4) carefully while supporting Segment (2).

5.17 Remove Gland Packing (12) being careful not to scratch or damage gland bore. Remove washers (10,

11) and Upper Thrust Bearing(9).

5.18 Remove cover gasket (16) again being careful not to scratch the surface. Remove Lower Thrust

Bearing (9) and Support (15).

5.19 Carefully clean and inspect all parts for wear and damage. Insure all gasket and packing residue is

thoroughly cleaned before valve is reassembled. All soft parts should be replaced

6. ASSEMBLY

For Soft-Seated Type

6.1

Install Upper Thrust Bearing (9) and Lower Support (15) along with Lower Thrust Bearing (9).

6.2

Carefully support Segment (2) in housing while inserting Stem (3) and Shaft (4) into body and into

Segment (2).

6.3

Install Cover Gasket (16) and End Cover (5) then secure with Cover Bolts (17).

6.4

Install Washer (10) followed by Washer

(11) then carefully install Gland Packing (12).

6.5

Install Gland (13) the secure with Gland Bolts (14)

6.6

The Segment should be in the closed position as shown below before installing the Seat and Cover.

See figure below

image.png 

Ò

V-SEGMENT SERIES

V-Port Segment Control Valves (VS/VV/VM)

Installation & Maintenance Manual

3 March 22, 2013

www.a-tcontrols.com

Engineering\documents\products\IOM\IOM8035.docx

6. ASSEMBLY

For Soft-Seated Type

6.1

Install Upper Thrust Bearing (9) and Lower Support (15) along with Lower Thrust Bearing (9).

6.2

Carefully support Segment (2) in housing while inserting Stem (3) and Shaft (4) into body and into

Segment (2).

6.3

Install Cover Gasket (16) and End Cover (5) then secure with Cover Bolts (17).

6.4

Install Washer (10) followed by Washer

(11) then carefully install Gland Packing (12).

6.5

Install Gland (13) the secure with Gland Bolts (14)

6.6

The Segment should be in the closed position as shown below before installing the Seat and Cover.

See figure below.

6.7

Insert the Seat (6A) and End Cover (5) into the Body (1),

6.8

Tighten Cover Bolts (17) and Bolts (8) in diagonal pattern with even strength. Tighten Gland Bolts (14).

6.9

Check that it is assembled correctly and in the CLOSED position.

For Metal-Seated Type

6.10 Complete steps 6.1 through 6.5 under Soft-Seated Type.

6.11 Insert the Seat Support (6B), Seat (6C), Packing (6D) Seat Gland (6E), Spring (6F) and Cap into the

Body (1).

6.12 Tighten Cover Bolts (17) and Bolts (8) in diagonal pattern with even strength. Tighten Gland Bolts (14).

6.13 Check that it is assembled correctly and in the CLOSED position

image.png 

 


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