Emerson ANDERSON GREENWOOD 4020HP Скачать руководство пользователя страница 5

ANDERSON GREENWOOD

 4020HP PRESSURE AND VACUUM RELIEF VALVE

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

5.0 INSTALLATION

1. Ensure that the mating connection to the 

tank is flat machined horizontal flange. 

2. Thoroughly clean the mating connection to 

remove all foreign matter which could lead 
to valve leakage if trapped between the valve 
seat and the pallet.

3. Ensure that the bore diameter of the tank 

connection nozzle is at least equal to the 
inlet bore of the valve connection.

4. For correct valve operation, there should be 

no external loads applied to the valve body.

5. Fit an inlet gasket to the mating flange 

ensuring it does not obstruct the flow path. 

6. Install the valve. Ensure that the main axis of 

the valve is perpendicular.

7. Tighten the flange bolting uniformly to 

ensure a good seal.

NOTE

The valve connection flange will have a 
combination of plain through holes, tapped 
through holes and blind tapped holes. The thread 
form of the tapped holes can be found from 
Table 1.

For valves of aluminium construction, 
appropriate flat face flanges should be used 
and a full-face gasket fitted.

6.0 MAINTENANCE

Regular inspection should be carried out 
to ensure that the pressure and vacuum 
ports are free from debris and that nothing 
preventing the correct operation of the valve is 
present. Maintenance should be performed at 
regular intervals and should be carried out by 
suitably qualified personnel in an appropriately 
equipped workshop. Alternatively, the valve 
should be returned to the manufacturer or 
suitably authorized agent for service/repair. 
During transport to the workshop the valve 
should be kept vertical to prevent damage to 
the internals.

WARNING

The relief valve must be isolated from tank 
pressure before servicing or removing. All gas/
vapour must be blocked and pressure safely 
vented. Wear appropriate protective clothing and 
breathing apparatus if hazardous gas/vapours 
are present.

NOTE

Storage tank inlet piping configurations should 
conform to recognized standards. Different 
configurations will develop different inlet pressure 
losses when the valve is flowing. This should be 
taken into consideration when sizing the valve for 
the application.

It is recommended that the external surfaces 
of carbon steel valves are painted immediately 
after installation.

TABLE 1 - INLET FLANGE THREAD FORMS

Size,
In. (mm)

Imperial

ANSI 125, 150

Metric

PN10

Metric

PN16

7.0 VALVE DISASSEMBLY (SEE FIGURE 1)

Before the valve is disassembled it should be 
thoroughly cleaned to remove potential hazards 
from process contamination.

IMPORTANT

During disassembly, it is important to identify 
the pressure and vacuum pallets so that on 
reassembly they are returned to the correct seat.

7.1 Pressure Side

1. Remove cap [P19] and release locknut [P18].
2. Remove all load from spring by removing 

adjusting screw [P16] complete 
with locknut. 

3. Remove nuts [P9], washers [P8] and 

casing [P2].

4. Remove  upper spring plate [P15]. For values 

6" (150 mm) and above, recover skid ring 
[P17] which is lifted between the adjusting 
screw and upper spring plate. 

5. Remove spring [P14] and stem [P13] 

complete with lower spring plate [P12]. 

6. Remove  weather hood [P1], bird screen [P5] 

and remove ball [P11]. Lift out pressure 
pallet assembly [P10].

7. Remove seat [P3] complete with guide posts 

[P4] by removing cap screws [P6]. 

8. Remove O-ring [P7]. Identify pallet assembly 

and seat pressure side parts. 

5

2 (50)

5

/

8

 – 11 UNC

M16 x 2

M16 x 2

3 (75)

5

/

8

 – 11 UNC

M16 x 2

M16 x 2

4 (100)

5

/

8

 – 11 UNC

M16 x 2

M16 x 2

6 (150)

3

/

4

 – 10 UNC

M20 x 2.5

M20 x 2.5

8 (200)

3

/

4

 – 10 UNC

M20 x 2.5

M20 x 2.5

10 (250)

7

/

8

 – 9 UNC

M20 x 2.5

M24 x 3

12 (300)

7

/

8

 – 9 UNC

M20 x 2.5

M24 x 3

Содержание ANDERSON GREENWOOD 4020HP

Страница 1: ...sembly 5 8 Valve Refurbishment 9 9 Valve Reassembly 9 10 Testing Set Pressure and Vacuum 10 Tables and Figures Table 1 Inlet Flange Thread Forms 5 Table 2 Vacuum Pallet Ranges inch 8 Table 3 Vacuum Pallet Ranges mm 8 Table 4 Seat Lap Band Width 9 Table 5 Pallet Thickness 10 Table 6 Pallet Lengths 10 Table 7 Equivalent Weights for Vacuum Setting 11 Table 8 Replacement Parts 13 Figure 1 Valve Genera...

Страница 2: ...vacuum will cause the vacuum pallet to begin to lift thus breaking the vacuum by allowing atmospheric air to be drawn into the tank in breathing In order for the valve to open and achieve its design lift an overpressure will be required The 4020HP PVRV has been designed to achieve this design lift and rated capacity within 10 overpressure Set pressures are adjusted by altering the compression on t...

Страница 3: ...rease set pressure and anticlockwise will decrease set pressure After adjustment secure adjusting screw P16 using locknut P18 and refit cap P19 3 Repeat set pressure verification as per 4 1 and repeat set pressure adjustment if required 4 3 Vacuum Setting Verification For verification of the vacuum setting the flow rate out of the accumulator should be limited such that when the vacuum setting is ...

Страница 4: ...Pressure Compression Spring P15 Upper Spring Plate P16 Pressure Adjusting Screw P17 Skid Ring 6 150 mm and larger P18 Locknut P19 Pressure Cap V1 Vacuum Seat Body V2 Cover V3 Vacuum Seat V4 Vacuum Post V5 Shroud V6 Cap Screw V7 Seat O ring V8 Cover O ring V9 Cover Washer V10 Cover Hex Set Screw V11 Vacuum Pallet Assembly V12 Vacuum Mesh V13 Mesh Plate V14 Mesh Plate Hex Set Screw V15 Guide Tube Ga...

Страница 5: ... must be isolated from tank pressure before servicing or removing All gas vapour must be blocked and pressure safely vented Wear appropriate protective clothing and breathing apparatus if hazardous gas vapours are present NOTE Storage tank inlet piping configurations should conform to recognized standards Different configurations will develop different inlet pressure losses when the valve is flowi...

Страница 6: ...ide tube V16 and guide tube gasket V15 3 Remove seat V3 complete with vacuum posts V4 by removing cap screws V6 4 Remove O ring V7 Identify pallet assembly weights and seat as vacuum side parts If required unscrew hex set screws V14 remove mesh plate V13 and recover vacuum mesh V12 7 3 Pressure Pallet See Figure 2 1 Remove nut 8 and washer where used 7 to release pivot point 9 from assembly 2 Sepa...

Страница 7: ...ction whereas the HP has a significant disc for strength Refer to Table 2 for vacuum pallet ranges VLP VP Vacuum Pallet 2 50 mm 3 75 mm and 4 100 mm Remove nut 5 washer where used 4 to release stem 6 from assembly Separate pallet disk 3 diaphragm 2 pallet 1 and any weights taking care to identify weights removed to help reassembly VLP VP VACUUM PALLET 6 150 mm 8 200 mm 10 250 mm and 12 300 mm Remo...

Страница 8: ...VLP Pallet LP Pallet HP Pallet From To inc Above To inc Above To 50 Aluminium 30 61 61 178 178 2540 316 SST 64 147 147 356 356 2540 75 Aluminium 28 43 43 178 178 2540 316 SST 64 99 99 356 356 2540 100 Aluminium 28 41 41 178 178 2540 316 SST 64 89 89 356 356 2540 150 Aluminium 28 51 51 178 178 2540 316 SST 64 112 112 356 356 2540 200 Aluminium 28 58 58 305 305 2540 316 SST 64 122 122 508 508 2540 2...

Страница 9: ...during disassembly however they can also be identified by thickness and length See Tables 4 and 5 Also discard and replace the pallet disk 9 1 Vacuum Pallet VLP LP Vacuum Pallet 2 50 mm 3 75 mm and 4 100 mm See Figure 3 Assemble pallet 1 diaphragm 2 and pallet disk 3 to stem 6 and secure using washer if fitted 4 and nut 5 VLP LP Vacuum Pallet 6 150 mm 8 200 mm 10 250 mm and 12 300 mm See Figure 4 ...

Страница 10: ...ring assembly 2 Reinstall pressure pallet as identified during valve disassembly ensuring the pallet slides easily between the guide posts Place ball P11 in socket of pivot point 8 Refit bird screen P5 and weather hood P1 3 Assemble stem P13 complete with lower spring plate P12 to locate on ball P11 Assemble spring P14 and upper spring plate P15 For valves 6 150 mm and larger fit skid ring P17 in ...

Страница 11: ...19 1 3 8 6 27 5 2 12 5 6 14 0 14 7 0 2 0 4 0 9 3 9 2 1 4 8 0 9 3 6 14 3 0 6 4 22 4 2 10 31 14 1 14 6 4 16 1 0 8 0 5 2 5 0 0 9 4 1 4 1 8 9 3 4 4 1 16 3 5 7 3 25 7 1 11 36 6 9 16 7 2 18 1 2 9 0 5 2 9 7 0 9 4 9 6 1 8 10 5 8 4 5 18 3 9 8 2 28 10 0 13 40 15 8 18 8 0 20 1 5 0 0 5 2 14 3 0 9 5 1 8 2 3 11 8 2 5 0 20 4 3 9 1 31 12 9 14 45 8 7 20 8 8 22 1 7 1 0 5 3 2 9 1 4 5 9 9 2 3 12 10 6 5 4 22 4 8 10 34...

Страница 12: ...08 2 1 49 154 13 5 70 4 8 70 4 9 6 1 8 10 2 1 4 5 17 14 1 7 7 40 4 7 18 70 15 1 32 111 5 0 50 159 6 4 72 5 6 72 4 11 7 1 8 10 6 7 4 5 18 6 3 8 2 41 7 1 19 72 15 5 33 114 7 9 52 163 15 2 74 6 4 74 4 13 8 1 8 10 11 3 4 5 18 14 5 8 2 42 9 6 19 74 16 0 34 117 10 8 53 168 8 1 76 7 2 76 4 15 9 1 8 10 16 0 4 5 19 6 7 8 6 43 12 0 20 77 0 4 35 120 13 7 54 173 1 0 78 8 0 78 5 2 1 2 3 11 4 6 5 0 19 14 8 8 6 ...

Страница 13: ... PTFE 11281489 11280624 11281492 11281495 11281497 11280837 11281502 Backing Disk Figures 4 and 5 Very Low Pressure General Service Gasket 11183856 11183886 11183887 11183888 Low Pressure 11411623 11411631 11411634 11411636 High Pressure 11183282 11183284 11183285 11183286 11183287 11183288 11183289 Spacer Disk Figures 4 and 5 Very Low Pressure General Service Gasket 11183857 11183889 11183890 111...

Страница 14: ... been made to ensure their accuracy they are not to be construed as warranties or guarantees express or implied regarding the products or services described herein or their use or applicability All sales are governed by our terms and conditions which are available upon request We reserve the right to modify or improve the designs or specifications of such products at any time without notice Emerso...

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