It can be measured or CLOSED amounts (90°) and the disk is driven by an actuator calculated using Metso Nelprof valve-sizing software. (manual, electric, pneumatic or hydraulic). There is a mark- Observe the relevant work environment regulations on ing on the drive shaft as well as on the body.
Normally the High Performance Butterfly Valve Type BO is delivered complete with the actuator. Visual inspection Before leaving Metso, the valve has been checked for tight- ness and functionality by Metso Quality Control and set for operation in accordance with the order-related specifica- tions.
The ATEX, ASME and/or CE markings are placed on the type plate (see Figure 3 ) in accordance with the specification of the valve. Contact Please contact your local Metso on: www.metso.com/valves Figure 5 Check the flange position before installing...
2 BO 70 en Caution advised when installing flaps with the safety position “Spring-to-open”! If the disc endures the total length of the valve, you must close the disc prior to installation (pneumatic, hydraulic, etc.). Be sure that the energy supply is safely fastened and cannot suffer damage or break off during installation.
The grounding cable must have a braided wire with at least 16mm2 conductive area to the grounding point in the pip- ing construction. ATEX certified valves must be serviced and maintained only by Metso Service or authorized personnel. Figure 7 Sample for a crosswise installation with twelve flange holes.
O-rings (472, 474), U-ring (475), bearing bushings (410, 424) After dismantling the valve, you must replace the lock- ing plate (447). For ordering the necessary spare parts set, please contact your Metso Service Partner. Figure 10 Sealings and bushes...
2 BO 70 en DETACHING AND MOUNTING THE ACTUATOR General The actuator mounting is in accordance with DIN/ISO 5211. Marking All actuators based on this standard can be easily mounted on the valve. Typical installations are for pneumatic- and hydraulic actuators with valve controllers for control, ESD or on/off use or with electric actuator or manual gear.
2 BO 70 en EXPLODED VIEW AND PARTS LIST PARTS LIST Part No. Qty. Description Material Spare part Body Carbon Steel Disc Aluminium hard coated Sealing Ring Stainless Steel O-ring seal Cylinder head screw Stainless Steel Seat Drive shaft Stainless Steel Shaft Stainless Steel Thrust bearing...
2 BO 70 en TROUBLESHOOTING SAFETY INSTRUCTIONS Valve leakage at the shut-off disc Please pay attention to the following safety instructions □ No matter what the situation, do not close the valve by when doing maintenance and when operating the high- force: irreparable damage may occur if you do so.
Cleaning and maintenance interval Type BO high-performance disc valves are to a great extent maintenance-free. Check the valve regularly for tightness. Metso recom- mends a replacement of the O-ring (320) on demand or in critical applications after no more than two years.
2 BO 70 en 11.4 Reassembly 11.5 Replacement of the sealing element To re-install the disc valve, please proceed as follows: Please proceed as follows: □ Close the disc valve. □ At the end of the actuator shaft and on the shaft exten- sion of the disc valve, there is a marking.
2 BO 70 en Loosen the hexagon head screws (306). ( Now you can remove the o-ring (320). see Figure 20-Figure 21). (Figure 23) Figure 22 Remove Pos.320 Figure 19 Loosen the screws Before replacing the o-ring, you must clean all parts with care and diligence.
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2 BO 70 en Figure 25 Figure 29 Figure 26 Figure 30 Figure 27 Figure 31 Figure 28...
2 BO 70 en Now following parts can be changed with the recom- The reassembly takes place in reverse order. To avoid mended spare part sets: damage to the seals, install the bearing bushings (424, 425) and the shafts (401, 402) with extreme care. Quantity/ Description Contents...
2 BO 70 en TYPE CODE – HOW TO ORDER 1. sign PRODUCT SERIES / DESIGN Standard temperature valve, eccentric soft seated high cycle construction, typically used for oxygen plants: (VPSA) use Available only as wafer (sign 4 = "5") Actuator preferably flush-mounted (=no bracket) 2.
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