Metso AS series Operating Instructions Manual
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Metso AS series Operating Instructions Manual

Metso AS series Operating Instructions Manual

Angle steam conditioning, combination type; with desuperheater for globe type
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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

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Summary of Contents for Metso AS series

  • Page 1 Control Valves Angle Steam Conditioning, Combination Type Series AS with Desuperheater for Globe type, Series GS Installation, Maintenance and Operating Instructions...

  • Page 2: Table Of Contents

    4 GV 76 en Table of Contents GENERAL...............3 Scope of the manual ..........3 Valve construction ..........3 Valve markings ............3 Technical specifications ........3 Valve seat leakage class ........3 Recycling and disposal ........3 Safety precautions ..........4 TRANSPORTATION, RECEPTION AND STORAGE...............4 VALVE INSTALLATION ........4 General ..............4 Installation into the pipeline ......4 Control valve assembly ........5...

  • Page 3: General

    Body material used. Plug, Stem material If you are uncertain about use of the valve or its suitability Seat material for your intended purpose, please contact Metso. Temp. min./max. Maximum (shut-off ) pressure Valve construction Valve manufacturing date Series AS, Angle Steam Conditioning, Combination type Tag No.

  • Page 4: Safety Precautions

    It can be measured or The valve is delivered in the closed position. A valve calculated using the Metso Nelprof software. Observe the equipped with a spring-return actuator is delivered in the relevant working environment regulations in terms of position determined by the spring.

  • Page 5: Control Valve Assembly

    Otherwise valve and trim damage or failure of the seals could result. NOTE: Flushing and hydrostatic test kit can be purchased from Metso. If you send the valve to the manufacturer for repair, do not dismantle it. Clean the valve carefully, including the inside.

  • Page 6: Replacing The Gland Packing

    4 GV 76 en Replacing the gland packing Table 1 Required torques for bonnet nuts Required Torques CAUTION: Valve Size Bonnet Stud Bolts (± 5 % allowable) Rating Do not dismantle the valve or remove it from the pipe- Carbon Steel St.

  • Page 7: Pilot Plug

    4 GV 76 en  Clean the body gasket surface.  Insert a new seat gasket (63) and the seat ring (7) & diffuser (81) kit into the body. CAUTION: Do not reuse the spiral wound gaskets (63 & 65 & 65a), this is need to be replace each time the valve is disas- sembled.

  • Page 8: Gs' Desuperheater

    4 GV 76 en  Remove the old packing rings (85) using a pointed tool, avoid damaging the seal surfaces and spray retainer.  Remove the spray retainer (88) sub-assembly using by the one of stud (87) carefully.  Grind welded point between the spray nozzle sub- assembly (detail ‘a’...

  • Page 9: Testing The Valve

    4 GV 76 en Tendril multi-stage Tendril multi-stage Pilot balanced trim Omega quick change, Standard balanced trim Omega quick change, Pilot balanced trim Fig. 12 Different trim designs TESTING THE VALVE CAUTION: Do not reuse the spray nozzle sub-assembly (detail ‘a’ , 89a~d), this is need to be replace each time the valve is CAUTION: disassembled.

  • Page 10: Removal & Mounting The Actuator

     Insert the yoke nut and tightly fasten the yoke by Several types of Metso actuators can be used with suitable turning the yoke nut clockwise using tightening clamps. Refer to the model VD spring-diaphragm and VC tools.
  • Page 11 4 GV 76 en  D. Actuator replacement (mounting) for VD Direct<air Remove the hexagon screws from the valve bonnet.  to close, stem extend> actuator (Fig. 13) Remove the actuator from the valve body assembly.  Mount the new or repaired actuator on top of the Actuator replacement (mounting)for VC actuator bonnet, using a suitable lifting device to setting.

  • Page 12: Tools

    4 GV 76 en TOOLS Removal of the actuator  L- wrench set(mm)  hex socket wrench set  chisel and hammer(10 pound)  +,- drivers ORDERING SPARE PARTS NOTE: Always use original spare parts to make sure that the valve functions as intended.

  • Page 13: Exploded View And Parts List

    4 GV 76 en EXPLODED VIEW AND PARTS LIST Series AS Live Load Application PILOT PLUG Item Description Recommended spare part Item Description Recommended spare part BODY PILOT STEM PLUG SET PILOT PLUG 3* PLUG PILOT COVER 5* STEM PILOT BOLT PILOT WIRE 6* PLUG PIN YOKE NUT...
  • Page 14 4 GV 76 en Series GS Item Description Recommended spare part DESUPERHEATER HOUSING SPRAY NOZZLE NOZZLE PLUG NOZZLE SEAT NOZZLE SPRING LOCK NUT HOUSING BONNET STUD HEXAGON NUT FLANGE GASKET...

  • Page 15: Dimensions And Weights

    4 GV 76 en DIMENSIONS AND WEIGHTS 10.1 Actuators VD, VC VDD Direct Action VDR Reverse Action FRONT RIGHT FRONT RIGHT (UNIT: mm) Without handwheel Size Weight (kg) NPT 1/4 NPT 1/4 NPT 1/4 NPT 1/4 NPT 1/4 NOTE 1. "Br" refers to reverse acting actuator, VDR 2.
  • Page 16 4 GV 76 en Size # 30 (UNIT: mm) Size # 40 Size # 50 (UNIT: mm) (UNIT: mm) Weight (kg) Weight (kg) Weight (kg) Stroke ØC Stroke ØC Stroke ØC Ø370 420 PT 1/2 92 Ø460 560 PT 1/2 120 Ø560 560 PT 1/2 186 Ø370...
  • Page 17 4 GV 76 en Size # 30 Size # 40 Size # 50 (UNIT: mm) (UNIT: mm) (UNIT: mm) Weight Weight Weight ( kg) (kg) (kg) Stroke A ØC Stroke A ØC Stroke A ØC 1095 1095 Ø370 410 470 PT 1/2 134 157 Ø460 845 616 PT 1/2 180 208 Ø560...

  • Page 18: Installation Guidelines

    Hydrostatic testing and Line flushing ensure reliable temperature measurement. Metso´s guide value for a slope against the flow is 1:200 as When the line is hydrostatic test and flushing, the control minimum. The drain must be provided at the lowest point valve should not used as an isolating valve.

  • Page 19: Downstream Piping

    It is necessary to have straight piping downstream of the away from piping (see drains). valve because sprayed water needs some distance to evap- Metso´s guide value for a slope with the flow is minimum orate and for example bends will separate water from 1:200.

  • Page 20: Spray Water Pipe

    Metso´s guideline value for a standard drain connection disturb temperature measurement causing problems in upstream is a G ½” pipe thread.

  • Page 21: Pre-Heating

    It is necessary to protect the downstream piping system. The connection has to be at lowest point after the valve. Metso´s guideline value for a standard drain connection in downstream piping is to size it for ~10% of the maximum spray water amount.

  • Page 22: Type Code

    (90) 60 (120) 82 (140) 106 (160) Special Special YY Special Contact Metso Automation for Cv details * Rated Cv is applied differently depending on the trim type & trim characteristic. * Srk. & number in bracket means the valve stroke.
  • Page 23 4 GV 76 en Desuperheater for Globe type, Series GS PRODUCT OTHERS VALVE SERIES HOUSING CONSTRUCTION Desuperheater for Globe type Desuperheater with Straight housing Desuperheater with Angle housing Desuperheater only HOUSING CONSTRUCTION Special BODY SIZE INLET SIZE OUTLET SIZE HOUSING MATERIAL "...
  • Page 24 4 GV 76 en Metso Flow Control Inc. South Korea, 235 Cheomdansaneop 1-ro, Daesowon-myeon, Chungju-si, Chungbuk-do, 380-871, Korea Tel. +82 43 852 7708, Fax +82 43 841 9890 Europe, Vanha Porvoontie 229, P.O. Box 304, FI-01301 Vantaa, Finland. Tel. +358 20 483 150. Fax +358 20 483 151 North America, 44 Bowditch Drive, P.O.

This manual is also suitable for:

Gs series

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