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Control Valves
Angle Steam Conditioning,
Combination Type

Series AS
with Desuperheater for Globe type,
Series GS

Installation, Maintenance and
Operating Instructions

4 GV 76

en • 6/2

Содержание AS series

Страница 1: ...Control Valves Angle Steam Conditioning Combination Type Series AS with Desuperheater for Globe type Series GS Installation Maintenance and Operating Instructions 4 GV 76 en 6 2016 ...

Страница 2: ...N RECEPTION AND STORAGE 4 3 VALVE INSTALLATION 4 3 1 General 4 3 2 Installation into the pipeline 4 3 3 Control valve assembly 5 3 4 Valve insulation 5 4 MAINTENANCE 5 4 1 General 5 4 2 Gland packing adjustment 5 4 3 Replacing the gland packing 6 4 4 Replacing the trim and body reassembly 6 4 5 Pilot Plug 7 4 6 Spray Nozzle 7 4 7 GS Desuperheater 8 5 TESTING THE VALVE 9 6 REMOVAL MOUNTING THE ACTU...

Страница 3: ...turing date 10 Tag No 11 Serial No 1 4 Technical specifications Face to face length customized dimensions depending on the customer spec Body rating Class 150 to Class 900 Max pressure differential acc to pressure class Temperature range amb to 593 C depending on the body materials and bonnet type Flow direction indicated by an arrow on the body normally flow to close Actuator mounting threaded bo...

Страница 4: ...s 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 plug movement Keep fingers other parts of the body tools and other objects out of the open flow port Leave no foreign objects inside the pipeline When the valve is actuated the plug functions as a cutting device Close and detach the...

Страница 5: ...o their installation mainte nance and operating manuals 3 4 Valve insulation If necessary the valve may be insulated Insulation must not continue above the upper level of the valve body see Fig 5 Fig 5 Insulation of the valve 4 MAINTENANCE 4 1 General The Neles series AS Angle Steam Conditioning valve require regular maintenance Check the gland packing for leakage This section outlines the mainten...

Страница 6: ... Required Torques 5 allowable mm in Size Q ty Carbon Steel Bolts St Steel Bolts Nm lbf ft Nm lbf ft 50 2 150 300 1 2 13UNC 8 101 74 80 59 600 1 2 13UNC 8 158 116 123 90 900 7 8 9UNC 8 199 146 199 146 1500 7 8 9UNC 8 286 210 80 3 150 300 3 4 10UNC 8 176 129 136 100 600 3 4 10UNC 8 211 155 900 1 1 8 8UNC 8 558 409 1500 1 1 8 8UNC 8 792 581 100 4 150 300 7 8 9UNC 8 222 163 160 118 600 7 8 9UNC 8 327 ...

Страница 7: ...lot cover 74 Remove the pilot plug 73 and pilot stem 72 from pilot main plug 71 Remove the pilot spring 77 carefully Remove the pilot plug 73 and the pilot seat as well as the surface inside of the pilot main plug 71 If there is damage scratches or grooves it should be replaced or repaired Insert the cleaned pilot spring 77 into the upper side of main plug Install the pilot plug 73 pilot stem 72 o...

Страница 8: ...one into the packing gland box using the gland as a tool Insert a new spray gasket 86 into the spray retainer 88 Install the spray cover 84 Tighten hexagon nuts 87a Fig 10 Integral Spring loaded injection type spray nozzle 4 7 GS Desuperheater Disassembly Assembly Remove the housing hexagon nuts 96a Remove the housing bonnet 95 sub assembly care fully Remove the flange gasket 97 Grind welded point...

Страница 9: ...e open position during the test Omega quick change Standard balanced trim Omega quick change Pilot balanced trim Tendril multi stage Tendril multi stage Pilot balanced trim CAUTION Do not reuse the spray nozzle sub assembly detail a 89a d this is need to be replace each time the valve is disassembled CAUTION Do not reuse the spiral wound gasket 86 this is need to be replace each time the valve is ...

Страница 10: ...nnect air line and accessories Lift the top stem 18 using by specified air pressure Adjustment stem length after clamping the clamp 1 according to rated travel stroke as open and close position as per pressurizing and depressurizing the lower diaphragm chamber Tighten stem socket head screws 1a and hexa gon nuts 1b with stem lock nut 5 C Actuator removal for VD Direct air to close stem extend actu...

Страница 11: ... the valve body assembly F Actuator replacement mounting for VC actuator Fig 14 Mount the new or repaired actuator on top of the valve bonnet using a suitable lifting device Insert the hexagon screws and tightly fasten the yoke by turning the hexagon screws clockwise using tightening tools Connect air line with actuator Down the top stem 18 by using specified air pressure Adjust stem length after ...

Страница 12: ...hen ordering spare parts always include the following information type code sales order number serial number number of the parts list part number name of the part and quantity required This information can be found from the identification plate or documents NOTE Always use original spare parts to make sure that the valve functions as intended ...

Страница 13: ...T 18 HEXAGON NUT 19 IDENTIFICATION PLATE 19a RIVET 21 LANTERN RING 25 DISK STACK 63 SEAT GASKET X 64 SEAL RING X 65 BODY GASKET X 65a BODY GASKET X 67 PACKING SPACER 69 PACKING RING X 71 PILOT MAIN PLUG Item Description Recommended spare part 72 PILOT STEM 73 PILOT PLUG 74 PILOT COVER 75 PILOT BOLT 76 PILOT WIRE 77 PILOT SRPING 80 DESUPERHEATER HOUSING 81 DIFFUSER 82 LINER 83 SPRAY BODY 84 SPRAY C...

Страница 14: ...95 97 89 89d 89c 89a 89b 80 Item Description Recommended spare part 80 DESUPERHEATER HOUSING 89 SPRAY NOZZLE 89a NOZZLE PLUG 89b NOZZLE SEAT 89c NOZZLE SPRING 89d LOCK NUT 95 HOUSING BONNET 96 STUD 96a HEXAGON NUT 97 FLANGE GASKET X ...

Страница 15: ...t acting actuator VDD UNIT mm With handwheel Size A2 Bd Br D A3 B hd B hr C2 Weight kg 25 255 348 373 NPT 1 4 312 110 170 225 22 29 295 391 416 NPT 1 4 312 122 182 251 28 37 375 464 489 NPT 1 4 342 141 201 284 43 48 486 652 677 NPT 1 4 464 144 244 381 119 55 566 695 720 NPT 1 4 464 144 244 381 145 NOTE 1 Br refers to reverse acting actuator VDR 2 Bd refers to direct acting actuator VDD VDD Direct ...

Страница 16: ... 830 Ø560 225 560 PT 1 2 192 242 995 390 70 145 840 Ø560 235 560 PT 1 2 195 246 1025 420 80 145 850 Ø560 245 560 PT 1 2 198 251 1055 450 90 145 860 Ø560 255 560 PT 1 2 201 256 1085 480 100 145 870 Ø560 265 560 PT 1 2 203 261 1115 510 120 145 890 Ø560 285 560 PT 1 2 209 270 1175 570 140 145 910 Ø560 305 560 PT 1 2 215 279 1235 630 180 145 950 Ø560 345 560 PT 1 2 227 298 1355 750 Size 60 UNIT mm Str...

Страница 17: ...15 Ø560 225 845 616 PT 1 2 252 303 1280 390 70 145 1125 Ø560 235 845 616 PT 1 2 255 308 1310 420 80 145 1135 Ø560 245 845 616 PT 1 2 258 313 1340 450 90 145 1145 Ø560 255 845 616 PT 1 2 261 318 1370 480 100 145 1155 Ø560 265 845 616 PT 1 2 263 322 1400 510 120 145 1175 Ø560 285 845 616 PT 1 2 269 332 1460 570 140 145 1195 Ø560 305 845 616 PT 1 2 275 341 1520 630 180 145 1235 Ø560 345 845 616 PT 1 ...

Страница 18: ...used as an isolating valve Make sure the control valve always be opened position before start this process Otherwise valve and trim damage or failure of the seals could result Flushing and hydrostatic test kit can be purchased from Metso 11 4 Piping upstream Upstream piping just before the AS valve must be straight and have no other components T piece junctions must also be avoided Metso s guideli...

Страница 19: ...steam and hence prevent optimum evaporation Metso s guideline for straight downstream piping is about10 times the nominal diameter and a minimum of 2 5 m In downstream piping it is also necessary to keep water away from piping see drains Metso s guide value for a slope with the flow is minimum 1 200 A drain should be provided a the lowest point 10 DN min 2 5 m Slope min 0 5 10 DN min 2 5 m Slope m...

Страница 20: ...ater control valve and the spray pipe should be minimized to less than 5 meters 11 7 Drains Condensate or non evaporated spray water in the valve or steam piping is very risky it can cause erosion in piping and the valve it causes vibration and water hammer and it can disturb temperature measurement causing problems in control Upstream drains are necessary to protect the AS valve The drain connect...

Страница 21: ... the temperature sensors The drain between AS valve and the temperature sensor is manda tory 11 8 Pre Heating Pre Heating lines prevent the formation of condensate and reduce the risk of thermal stress Especially in cases where the AS valve is closed in normal conditions e g Bypass Valves preheating has to be arranged 11 9 Temperature sensor The temperature sensors are fitted downstream in the str...

Страница 22: ...316 SS Graphite for high temp M S W gasket type 316 SS Graphite for extreme temp Y Special 18 STUD NUT MATERIAL H A193 gr B16 A194 gr 4 Y Special 19 OPTIONS X Not applicable Y Special 20 TRIM TYPE 21 TRIM CHARACTERISTIC 22 RATED Cv Sign Sign Sign Description Body Size 2 Srk 3 Srk 4 Srk 6 Srk 8 Srk 10 Srk 12 Srk 14 Srk 16 Srk B Balanced plug type L Linear FT Tendril 1 stage Full capacity 32 40 78 5...

Страница 23: ... 4 END CONNECTION W Flanged RF ASME B16 5 V Socket welding ASME B16 11 Q Butt welding ASME B16 25 Z Ring joint flange ASME B16 5 Y Special 5 HOUSING CONSTRUCTION S Desuperheater with Straight housing N Desuperheater with Angle housing D Desuperheater only Y Special 6 HOUSING MATERIAL BX A335 gr P11 CM A335 gr P21 DK A335 gr P91 XX Not applicable YY Special 7 SPRAY NOZZLE CONSTRUCTION A 1 Spray noz...

Страница 24: ...a Av Independéncia 2500 Iporanga 18087 101 Sorocaba São Paulo Brazil Tel 55 15 2102 9700 Fax 55 15 2102 9748 Asia Pacific Haw Par Centre 06 01 180 Clemenceau Avenue Singapore 239922 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 B...

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