Metso NELDISC L4 Series Intallation, Maintenance And Operating Instructions Download

Page: 8 / 36

2 L6 70 en

5.2

Removing the valve from the pipeline

It is generally most convenient to detach the actuator and
its auxiliary devices (see Section 6), before removing the
valve from the pipeline. If the valve package is small or diffi-
cult to access, it may be more practical to remove the entire
package at the same time.

Ensure that the valve is not pressurized and the pipeline is
empty. Ensure that the medium cannot flow into the sec-
tion where servicing is to take place. The valve must be in a
closed position when removing.

Support the valve carefully with a hoist. Place ropes care-
fully and unscrew the pipe flange bolts. Ensure that the
ropes are positioned correctly. Lift valve correctly (see
Fig. 3).

5.3

Replacing the gland packing

PTFE V-rings are used as a standard gland packing and
graphite rings for high temperature constructions. The
packing construction is live loaded as standard.

The gland packing (20) must be changed if leakage occurs
even after the hex nuts (25) have been tightened as recom-
mended.

5.3.1

L6C, L6D, L6F/D and L4F/D



Make sure the valve is not pressurized.



Unfasten the nuts (25) and remove the disc spring
(TA-Luft) kits (43), the retaining plates (42) and the
gland (9).



Remove old packing rings (20). Do not damage the
surfaces of the packing ring counterbore and shaft. It
is not necessary to change anti-extrusion ring (22).



Clean the gland and packing ring counterbore.
Install new set of packings (V-ring or graphite). Slip
the rings onto the shaft. Ensure that there are no
burrs in the keyway groove which could damage the
packing.



Install the gland.



Mount the retaining plates with the text UPSIDE on
top (see Fig. 10).



Mount the disc spring kits.



Place the nuts on the studs.



Pre-compress the gland packing by tightening the
nuts with a tool until the disc springs have value of
compression (h

–h

) as in Tables 7 and 8.



Carry out 3…5 operation cycles with the valve. Suita-
ble range of movement is about 80 %.
It is not necessary to fully close or open the valve
during the operation.



Unfasten the nuts and disc springs.



Measure the height h

of the disc springs and use

these values as a basis when defining the final
height of the springs (as compressed condition).



Re-install the disc springs and tighten the nuts with
the tool. Tighten the nuts until the set value of com-
pression (h

–h

) of disc springs is achieved, see

Tables 7 and 8.

NOTE:

For safety reasons, replace pressure retaining bolting if the
threads are damaged, have been heated, stretched or cor-
roded.

CAUTION:
Do not dismantle the valve or remove it from the pipe-
line while the valve is pressurized!

Fig. 10.

Mounting the retaining plates

Table 7.

Tightening of gland packing, L6C and L6D

L6C

L6D

Spring set

dia

Thread

Compression (h

–h

), mm

Packing ring material

DN / NPS

M, UNC

PTFE

100 / 4

M8, 5/16

2.0

1.0

150 / 6, 200 /

150 / 6

M8, 5/16

2.5

1.5

250 / 10

200 / 8

M10, 3/8

2.5

1.5

300 / 12

M10, 3/8

3.0

1.5

350 / 14

250 / 10

M10, 3/8

3.0

2.0

400 / 16

M10, 3/8

3.0

2.0

450 / 18

300 / 12

35.5

M14, 1/2

4.5

2.5

500 / 20

350 / 14

35.5

M14, 1/2

4.5

2.5

600 / 24

400 / 16

35.5

M14, 1/2

4.5

3.0

700 / 28,

750 / 30

450 / 18,

500 / 20

M18, 5/8

5.0

3.0

800 / 32

600 / 24

M18, 5/8

5.5

3.5

900 / 36,

950 / 38

700 / 28,

750 / 30

M20, 3/4

6.0

4.0

1000 / 40

M20, 3/4

6.5

4.0

1200 / 48

M20, 3/4

6.0

5.0

800 / 32

M24, 1

6.5

5.5

900 / 36

M22, 7/8

6.5

5.0

1400 / 56

M30, 1 1/4

6.5

1000 / 40,

1200 / 48

M24, 1

(4 pcs.)

6.5

6.0

1400 / 56

M36, 1 1/2

9.0

6.5

Table 8.

Tightening of gland packing, L6F/D and L4F/D

L6F/D
L4F/D

Spring set dia

Thread

Compression (h

–h

) mm

Packing ring material

DN / NPS

M, UNC

Gr PTFE

PTFE

100 / 4

M10, 3/8

1.5

1.0

150 / 6

M10, 3/8

1.5

1.0

200 / 8

35.5

M14, 1/2

2.0

1.0

250 / 10

M18, 5/8

3.5

1.5

300 / 12

M20, 3/4

4.0

2.0

350 / 14

M20, 3/4

3.5

2.0

400 / 16

M20, 3/4

3.5

2.0

450 / 18

M22, 7/8

4.0

2.5

500 / 20

M24, 1

6.0

3.5

600 / 24

M24, 1

6.5

4.0

700 / 28

M30, 1 1/4

6.5

4.0

750 / 30

M30, 1 1/4

6.5

4.0

900 / 36

M24, 1

(4 pcs.)

6.5

5.0

Summary of Contents for NELDISC L4 Series

Page 1: ...2 L6 70 en 10 2017 NELDISC Metal seated high performance triple eccentric disc valve Series L6 L4 Installation Maintenance and Operating Instructions ...

Page 2: ...TION 4 3 1 General 4 3 2 Mounting into the pipeline 5 3 3 Actuator 7 4 COMMISSIONING 7 5 MAINTENANCE 7 5 1 Maintenance general 7 5 2 Removing the valve from the pipeline 8 5 3 Replacing the gland packing 8 5 4 Valve leakage 9 5 5 Replacing the seat ring 10 5 6 Replacing the disc shafts and bearings 11 5 7 Assembling the valve 11 6 DETACHING AND INSTALLING THE ACTUATOR 12 6 1 General 12 6 2 Detachi...

Page 3: ...e manufacturing parts list no 10 Pressure class 1 4 Technical specifications Type L6 Flanged reduced bore metal seated triple eccentric disc valve L4 Wafer reduced bore metal seated triple eccentric disc valve Pressure class L6C ASME Class 150 L6D ASME Class 300 L6F Body and trim ASME Class 600 L6F D Body ASME Class 600 Trim ASME Class 300 L4F D Body ASME Class 600 Trim ASME Class 300 Possible fla...

Page 4: ...valve and remove the medium before dismantling the valve Be aware of the type of medium involved Protect people and the environment from any harmful or poisonous sub stances Make sure that no medium can enter the pipeline during valve maintenance Failure to do this may result in damage or personal injury CAUTION Beware of the discs cutting movement Keep hands other parts of the body tools and othe...

Page 5: ...ly after a pipe elbow the valve shaft must be directed toward the centre point of the pipe see Fig 5 This is especially important when the valve is used as a control valve The valve shaft of a valve mounted after the centrifugal pump must be perpendicular to the pump shaft see Fig 6 When thus installed the valve discs will be more evenly loaded and vibrations otherwise possible in the intermedi at...

Page 6: ... 8 32 1 1 2 8UN 260 48 200 8 34 1 1 2 8UN 260 56 200 8 36 1 1 2 8UN 280 56 210 8 40 1 1 2 8UN 280 64 200 8 42 1 1 2 8UN 290 56 210 16 48 1 1 2 8UN 310 72 240 16 52 1 3 4 8UN 350 72 280 16 56 1 3 4 8UN 360 80 290 16 flanges acc to ASME B16 47 series A Table 3 Stud bolt dimensions mm L6D ASME Class 300 flanges Both flanges included Size NPS Thread K L L1 Length Qty Length Qty 04 3 4 UNC 115 12 100 4...

Page 7: ...our local Metso experts During this periodic inspection the parts detailed in the Spare Part Set should be replaced Time in storage should be included in the inspection inter val Maintenance can be performed as presented below Fo maintenance assistance please contact your local Metso office The part numbers in the text refer to the exploded view and to the parts list in Section 9 unless otherwise ...

Page 8: ...ement is about 80 It is not necessary to fully close or open the valve during the operation Unfasten the nuts and disc springs Measure the height h1 of the disc springs and use these values as a basis when defining the final height of the springs as compressed condition Re install the disc springs and tighten the nuts with the tool Tighten the nuts until the set value of com pression h1 h2 of disc...

Page 9: ... with the tool Tighten the nuts until the set value of com pression h1 h2 of disc springs is achieved see Table 9 If the leakage still occurs when the valve is pressur ized re tighten the nuts but don t exceed the value in the Table 9 by 50 or do not fully compress the disc springs 5 4 Valve leakage Valve leakage is not always caused by a damaged seat ring or disc The reason can also be that the d...

Page 10: ...at ring The screw heads must be below the flange surface in lug type valves Check the position between the seat ring and the disc The valve closes clockwise see Fig 14 Mount the actuator into the valve Adjust the closed position limit and check the open position limit see Section 6 5 5 2 L6F Remove the clamp ring 2 and the old seat ring 4 Clean up graphite from the body groove Polish the contact s...

Page 11: ...a larger pin size File off any burrs from the shafts The bearings for the valves N U and H constructions are cobalt alloy bushings which are mounted into the body together with the shafts Mount the bearing into the shaft Spray a thin layer of dry lubricating fluid e g Molykote 321R or equiva lent into the inside surface of the bushing and the shaft bearing groove Press the bushing with a tight eni...

Page 12: ...tor It is highly recommended to use a suitable bushing from the tool set H061544 between the tightening screw I and drive shaft The bushing dimensions are given in Table 12 Detach the actuator finally from the valve after the screws that attach the actuator to the valve have been removed 6 4 Installing the B1 series actuator Turn the valve to the closed position before mount ing the actuator Clean...

Page 13: ...haft according to Fig 22 Cylindri cal pins III are inserted in the bushing slots and these must be directed into the corresponding slots in the actuator during tightening Before the installa tion of the bushing and the tightening screw impu rities such as old threadlocking material have to be removed from the threads of the tightening screw and Loctite 225 or similar Threadlock have to be carefull...

Page 14: ...carried out improperly Finally the extreme rotation positions of the valve are adjusted with the adjustment screws at the ends of the actuator The location of the screws for adjust ing the close and open positions of the valve are marked on the actuator housing see Fig 25 See Section 6 7 6 6 Detaching and installing other actuator types See actuator s manual for details 6 7 Stop screw adjustment 6...

Page 15: ...fing the stop screw After adjusting check the adjusting margin through the air connection hole The piston must not touch the cylinder end If necessary increase the margin by loosening the bracket screws and turning the actua tor clockwise An extra long screw is needed for opening angles 80 6 7 7 Spring return cylinder actuator B1JA Spring to open The actuator being unpressurized the valve is open ...

Page 16: ...special tools are needed for servicing the valve How ever we recommend an extractor tool ID code table in actuator s IMO for removing the actuator from the valve The tool can be ordered from the manufacturer 8 ORDERING SPARE PARTS When ordering spare parts always include the following information type code sales order number serial number stamped on a valve body number of the parts list part numbe...

Page 17: ... 81 5 QP4C 4 3 62 M07 26 19 11 4 2 61 7 QP5C 0 8 12 3 5 51 M10 27 20 12 3 3 48 0 2 3 3 8 55 sprin g 3 2 46 0 8 12 4 6 68 10 13 2 1 30 12 3 8 55 sprin g 4 5 65 16 1 6 23 0 9 13 3 1 45 0 5 7 2 6 38 1 3 19 3 8 55 14 1 6 23 1 15 3 2 46 300 12 500 370 12 5 5 80 sprin g 4 6 67 4 58 sprin g 5 5 80 7 QP5C 0 1 1 4 1 59 M10 43 32 13 3 5 51 10 M12 44 32 16 2 8 41 0 5 7 3 6 52 0 3 43 1 14 4 3 62 12 17 1 8 26 ...

Page 18: ...2 4 7 68 sprin g 4 2 61 3 6 52 0 3 4 4 8 70 M25 244 180 322 0 6 9 0 2 3 40 2 3 33 50 1 2 17 900 36 9400 6930 322 0 3 4 sprin g 40 3 3 48 950 38 9400 6930 50 1 7 25 1000 40 12600 9290 322 sprin g 40 4 4 64 50 2 3 33 1200 48 16400 12090 40 5 7 83 50 2 9 42 502 1 3 19 1400 56 25600 18880 50 4 8 70 502 2 29 1600 64 35000 25800 50 6 6 96 502 2 7 39 1700 68 22000 16200 50 4 2 61 502 1 7 25 1800 72 22000...

Page 19: ...3 4 4 1 59 16 1 3 19 0 9 13 3 43 0 6 9 2 3 33 1 5 22 3 7 54 14 250 10 460 340 11 6 4 93 5 QPC5 0 3 4 3 9 57 M10 40 29 12 5 72 sprin g 4 4 64 3 8 55 0 1 1 5 3 77 7 M12 38 28 13 3 2 46 10 M14 28 21 16 2 5 36 0 5 7 3 5 51 0 1 1 2 9 42 1 14 4 2 61 12 5 9 86 sprin g 5 5 80 17 1 7 25 14 2 4 35 0 6 9 3 6 52 20 1 4 20 1 14 2 9 42 0 6 9 2 3 33 1 5 22 3 5 51 300 12 800 590 13 5 6 81 7 M14 49 36 16 4 4 64 sp...

Page 20: ...22 0 9 13 3 43 0 5 7 2 4 35 130 50 0 8 12 502 0 3 4 700 28 6700 4940 32 4 8 70 sprin g 4 3 62 3 6 52 0 2 3 4 9 71 M25 244 180 322 0 6 9 0 2 3 750 30 40 2 3 33 800 32 9800 7230 322 0 2 3 sprin g 40 3 4 49 50 1 8 26 900 36 12000 8850 322 sprin g 40 4 2 61 50 2 2 32 1000 40 19000 14010 50 3 4 49 502 1 5 22 1050 42 1100 44 1200 48 1250 50 1400 56 38000 28000 50 7 2 104 502 2 9 42 1500 60 602 2 29 Spri...

Page 21: ...8 12 4 3 62 M10 27 20 12 3 3 48 0 4 6 4 6 67 0 1 1 3 8 55 0 8 12 5 6 81 10 13 2 1 30 12 3 8 55 0 2 3 5 3 77 16 1 7 25 0 7 10 3 9 57 0 5 7 3 0 44 1 2 17 4 8 69 14 250 10 600 11 8 3 120 5 QPC5 0 2 3 5 1 74 M12 21 16 12 6 5 94 5 7 83 4 9 71 0 1 1 6 9 100 7 M14 36 27 13 4 2 61 10 16 3 3 48 0 4 6 4 6 67 0 1 1 3 8 55 0 8 12 5 5 80 12 7 7 112 7 2 104 17 2 2 32 14 3 1 45 0 5 7 4 7 68 20 1 8 26 0 8 12 3 8 ...

Page 22: ... lbf ft 600 24 5330 3930 32 3 9 57 0 3 4 4 7 68 3 9 57 0 7 10 5 5 80 M25 147 108 40 1 8 26 322 0 7 10 3 9 57 0 4 6 3 1 45 700 28 8710 6422 32 6 2 90 5 6 81 4 7 68 0 2 3 6 4 93 322 0 5 7 0 2 3 750 30 40 3 0 44 800 32 12740 9390 322 0 2 3 40 4 4 64 50 2 3 33 900 36 15600 11495 40 5 5 80 50 2 9 42 Spring spring torque not adequete to reach tIghtness according to ISO 5208 Rate D BS 6755 Part 1 Rate D ...

Page 23: ...49 32 0 7 10 1 2 17 2 2 32 0 8 12 1 5 22 1 7 25 2 7 39 350 14 1250 920 17 4 5 65 M15 66 49 20 3 7 54 0 2 3 3 7 54 sprin g 3 1 45 0 6 9 4 2 61 M16 44 32 25 1 9 28 0 8 12 3 1 45 0 4 6 2 5 36 1 3 19 3 5 51 M25 45 33 32 1 0 15 1 1 16 2 8 49 0 8 12 2 1 30 1 6 23 3 3 48 40 0 5 7 400 16 1600 1180 20 4 7 68 sprin g 4 1 59 sprin g 3 5 51 0 3 4 4 5 65 M16 56 41 25 2 5 36 0 6 9 3 2 46 0 3 4 2 6 38 1 1 16 3 7...

Page 24: ... 6 67 sprin g 4 1 59 sprin g 3 4 49 0 4 6 4 6 67 322 0 7 10 3 3 48 0 3 4 2 6 38 1 2 17 3 8 55 40 2 2 32 50 1 1 16 502 0 4 6 700 750 28 30 8000 5890 322 0 4 6 3 6 52 0 1 1 2 9 42 0 9 13 4 0 58 40 3 0 44 50 1 5 22 800 32 322 40 50 502 900 36 50 502 602 752 Spring spring torque not adequete to reach tightness according to ISO 5208 Rate D BS 6755 Part 1 Rate D ANSI FCI 70 2 Class V IEC 534 4 or MSS SP...

Page 25: ... 16 1 17 20 9 42 24 25 13 11 14 3 14 12 2 27 26a 4 19 2 15 18 15 30 44 26b Item Qty Description Spare part category 1 1 Body 2 1 Clamp ring 3 1 Disc 3 4 1 Seat ring 2 9 1 Gland 10 1 Blind flange 11 1 Drive shaft 3 12 1 Shaft 3 13 1 Key 3 14 3 Pin 3 15 1 Bearing 3 16 1 Bearing 3 17 2 Thrust bearing 18 1 Gasket 1 19 1 Body seal 1 20 1 set Gland packing 1 21 1 Spring washer 22 1 Anti extrusion ring 2...

Page 26: ...l parts from the categories 1 2 and 3 10 16 1 20 9a 25 42 13 11 14 3 14 12 2 44 4 27 15 18 15 19 24 9b 26b 26a Item Qty Description Spare part category 1 1 Body 2 1 Clamp ring 3 1 Disc 3 4 1 Seat ring 2 9a 1 Casting gland 9b 1 Compression ring 10 1 Blind flange 11 1 Drive shaft 3 12 1 Shaft 3 13 1 Key 3 14 3 Pin 3 15 4 Bearing 3 16 2 Bearing 3 18 1 Gasket 1 19 1 Body seal 1 20 1 set Gland packing ...

Page 27: ...00 135 475 148 9 31 75 225 1475 360 135 6900 1 1 4 7 8 NPS Dimensions in lb U V A A1 øB øB1 øH øD C E øO R P M N K S T 4 5 00 2 91 9 13 6 18 7 50 0 75 3 54 10 75 0 59 4 13 0 67 0 19 0 98 9 76 2 76 55 M10 M8 5 5 51 3 15 10 12 7 31 8 50 0 91 5 31 12 09 0 79 4 92 0 87 0 19 1 38 10 71 3 54 75 M12 M8 6 5 51 3 11 11 81 8 50 9 50 0 91 5 31 12 99 0 79 4 92 0 87 0 19 1 38 11 61 3 54 88 M12 M8 8 5 98 3 25 1...

Page 28: ...E øO R P M N K S T 4 5 00 2 91 10 12 6 19 7 87 0 91 3 54 10 75 0 59 4 13 0 67 0 19 0 98 9 76 2 76 75 M10 M8 5 5 51 3 15 11 14 7 31 9 25 0 91 4 72 12 09 0 79 4 92 0 87 0 19 1 38 10 71 3 54 110 M12 M8 6 5 51 3 11 12 64 8 50 10 63 0 91 5 31 12 99 0 79 4 92 0 87 0 19 1 38 11 61 3 54 132 M12 M8 8 5 98 3 15 15 12 10 62 13 00 1 02 6 50 14 49 0 98 5 35 1 09 0 25 1 81 12 68 4 33 1 26 198 M12 M10 10 6 50 3 ...

Page 29: ...60 135 2770 1 1 4 1 1 4 NPS Dimensions in lb U V A A1 øB øB1 øH øD C E øO R P M N K S T 4 7 48 4 33 10 75 6 19 8 50 1 02 4 33 10 63 0 59 4 92 0 67 0 19 0 98 9 65 4 33 1 26 99 3 8 3 8 6 8 27 4 92 14 02 8 50 11 50 1 14 5 91 12 40 0 79 4 53 0 89 0 19 1 38 11 02 4 33 1 26 198 1 2 3 8 8 9 06 6 97 16 54 12 13 13 75 1 26 8 86 14 80 0 98 5 75 1 09 0 25 1 81 12 99 4 33 1 26 330 1 2 1 2 10 9 84 5 71 20 00 1...

Page 30: ...1 250 400 160 3150 M3 M36 190 6 79 5 NPS Dimensions in lb U V X Y A A1 ØB ØB1 ØH ØD C E K ØO R P M N S T 6 8 27 4 68 13 98 8 50 11 50 1 12 8 50 16 28 14 27 1 18 6 33 1 31 0 25 2 01 5 12 1 38 227 M12 M12 8 9 06 6 19 16 54 10 63 13 75 1 26 10 08 18 03 15 75 1 38 7 01 1 54 0 38 2 28 6 30 1 57 326 M16 M12 10 9 84 5 71 20 08 12 75 17 00 1 38 12 20 20 87 17 72 1 77 7 87 2 01 0 50 3 15 6 30 1 57 595 M16 ...

Page 31: ...685 1195 135 475 148 9 31 75 225 360 135 1 1 4 1 1625 Size Dimensions in UNC Weight lb NPS Di A A1 øB øB1 C E O R P M N S T U V 04 3 2 52 1 02 10 83 6 19 5 31 10 63 0 59 4 92 0 67 0 19 0 98 4 33 1 26 1 2 3 8 37 06 5 2 99 1 18 13 98 8 50 7 48 13 19 0 79 5 31 0 87 0 19 1 38 4 33 1 26 1 2 3 8 66 08 6 3 50 1 42 16 54 10 63 8 86 15 20 0 98 5 75 1 09 0 25 1 81 4 33 1 26 1 2 1 2 143 10 8 4 49 1 93 20 08 ...

Page 32: ...150 1660 194 595 3 4 446 B1C50 610 1350 1970 242 690 1 830 Type Dimensions mm NPT kg X G F V J B1J B1JA8 135 420 560 43 279 3 8 17 B1J B1JA10 175 490 650 51 290 3 8 30 B1J B1JA12 215 620 800 65 316 1 2 57 B1J B1JA16 265 760 990 78 351 1 2 100 B1J B1JA20 395 935 1200 97 358 3 4 175 B1J B1JA25 505 1200 1530 121 448 3 4 350 B1J B1JA32 540 1410 1830 153 525 1 671 Type Dimensions in NPT lb X G F V J B1...

Page 33: ...sign in size range 28 80 cl 150 cl 300 and 4 36 L6F D Tmax 425 C 800 F shaft bearings surfaces chrome plated bearings NITRONIC 60 not NACE bearings cobalt based alloy NACE body and blind flange gaskets graphite clamp ring screws Gr 660 NACE bare shaft valve ATEX II 2 G c H or 1H NACE High temperature tmax 600 C 1112 F bearing surfaces of shafts cobalt based alloy bearings cobalt based alloy body a...

Page 34: ...34 2 L6 70 en ...

Page 35: ...2 L6 70 en 35 ...

Page 36: ... Sorocaba São Paulo Brazil Tel 55 15 2102 9700 Fax 55 15 2102 9748 Asia Pacific 238B Thomson Road 17 01 Novena Square Tower B Singapore 307685 Tel 65 6511 1011 Fax 65 6250 0830 China 11 F China Youth Plaza No 19 North Rd of East 3rd Ring Rd Chaoyang District Beijing 100020 China Tel 86 10 6566 6600 Fax 86 10 6566 2583 Middle East Roundabout 8 Unit AB 07 P O Box 17175 Jebel Ali Freezone Dubai Unite...

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