untitled Li ce ns ed C op y F U LL N A M E , D A T E , U nc on tr ol le d C op y, ( c) B S I BRITISH STANDARD BS EN 50216 8 2005 Incorporating amendment no 1 Power transformer and reactor fittings — P[.]
BRITISH STANDARD BS EN 50216-8:2005 Incorporating amendment no Licensed Copy: :FULLNAME, : DATE, Uncontrolled Copy, (c) BSI Power transformer and reactor fittings — Part 8: Butterfly valves for insulating liquid circuits The European Standard EN 50216-8:2005, incorporating amendment A1:2006, has the status of a British Standard ICS 23.060.30; 29.180 12&23100 - ≤175 >175 ≤ 0,5 ≤ 1,0 ≤ 2,0 6.3 Operating torque The operating torque should not exceed values shown in the following Table Table – Operating torque Nominal diameter of valve in mm ≤ 100 >100 - ≤150 >150 Operating torque in Nm ≤ 10 ≤ 30 ≤ 30 Closing torque in Nm ≤ 70 ≤ 100 ≤ 150 Opening torque in Nm ≤ 40 ≤ 50 ≤ 50 The following additional definitions apply: 6.3.1 operating torque torque necessary to turn the shaft from the open to the closed position 6.3.2 closing torque torque necessary to obtain the complete closure of the valve 6.3.3 opening torque torque necessary to open the valve, after complete closure 6.4 Maximum working overpressure with the butterfly valve in open and closed position The fully mounted valve, in service conditions, shall withstand and operate with any pressure inside the pipe from vacuum to 100 kPa in open position and 80 kPa in closed position In addition, the pressure or vacuum can be applied on only one side of the closed butterfly Higher pressure values may be agreed between purchaser and manufacturer EN 50216-8:2005 Tests 7.1 Tightness of the mounted valve – 10 – This test is to be considered a type test Licensed Copy: :FULLNAME, : DATE, Uncontrolled Copy, (c) BSI Test must be done with air at a pressure of 200 kPa on the valve mounted on a tube flanged on one side, with a blind flange on the other side; no air leaks must be observed with all the assembly immersed in water The tightness of the mounted valve either to pressure or to vacuum has to be guaranteed mainly by the valve design and by the materials and machining characteristics used in the construction 7.2 Tightness of the butterfly blade This test is a routine test to be carried out by sampling on each manufacturing lot; number of samples to be decided and declared by the manufacturer The valve shall be closed by a dynamometric spanner using the values indicated in Table The valve shall then be tested with oil at 20 °C, 100 kPa and viscosity of 30,5 cSt The leakage at the butterfly over a period of hour must be less than the maximum admissible values indicated in Table In addition, as a type test, a butterfly blade may be submitted to a test as above, but with oil at 60 °C The leakage amount after one hour shall be agreed between purchaser and supplier ! Other methods of test can be agreed between supplier and purchaser." 7.3 Operating torque This test is a routine test to be carried out by sampling on each manufacturing lot; number of samples to be decided and declared by the manufacturer The torque values must be less than the values shown in Table 7.4 Maximum working overpressure with the butterfly valve in open and closed position This test is to be considered a type test The valve shall be mounted on a pipeline in which it is possible to create an oil pressure of 200 kPa on both sides of the butterfly After operations without any malfunctioning in the different conditions: • pressure on both sides, • pressure on each side; the valve shall be dismounted from the pipeline and visually inspected to verify the integrity of the components Supply conditions The valves shall be supplied clean from any mechanical scrap or particle and slightly oiled with transformer mineral oil to prevent corrosion during shipment and stocking Licensed Copy: :FULLNAME, : DATE, Uncontrolled Copy, (c) BSI – 11 – ! a) Types A1, A2 and A3 Assembly with screws and nuts" ! c) EN 50216-8:2005 Type A3 Alternative assembly with screws and nuts" Key: - Butterfly valve - Flange - Transformer tank - Screw – bolt - Pipeline – radiator !b) Types A1, A2 and A3 Assembly with bolts and nuts" !Figure - Assembly layout of butterfly valves types A1, A2 and A3" Licensed Copy: :FULLNAME, : DATE, Uncontrolled Copy, (c) BSI EN 50216-8:2005 a) – 12 – Assembly on pipeline between flanges c) Assembly on tank wall with welded studs Key: - Butterfly valve - Flange - Transformer tank - Screw – bolt -stud - Pipeline – radiator b) Assembly on tank wall with bolts Figure – Assembly layout of butterfly valves type B1 and B2 Licensed Copy: :FULLNAME, : DATE, Uncontrolled Copy, (c) BSI – 13 – EN 50216-8:2005 Key: - Butterfly valve - Flange - !Text deleted" - Screw – bolt -stud - Pipeline – radiator Assembly on pipeline between flanges Figure – Assembly layout of butterfly valves type C1 and C2 Licensed Copy: :FULLNAME, : DATE, Uncontrolled Copy, (c) BSI EN 50216-8:2005 – 14 – Table ! Type DN ØA W ØB N R1 A1T-50 short 50 51 125 125 M16 A1H-50 short 50 51 125 125 A1T-80 short 80 78 150 160 A1H-80 short 80 78 150 160 A2T-80 mid 80 78 150 160 A2H-80 mid 80 78 150 160 A3T-80 long 80 78 150 160 A3H-80 long 80 78 150 160 R2 Ø18 M16 Ø18 M16 Ø18 M16 Ø18 ØD K S H L max P max Q max R max 63 70 14 110 40 52 52 63 70 14 110 40 52 52 90 70 21 120 42 52 52 90 70 21 120 42 52 52 90 85 21 120 42 52 52 90 85 21 120 42 52 52 90 105 21 120 42 52 52 90 105 21 120 42 52 52 Figure - Dimensions of butterfly valves types A1, A2 and A3 " Licensed Copy: :FULLNAME, : DATE, Uncontrolled Copy, (c) BSI – 15 – EN 50216-8:2005 Table L P Q R (max) (max) (max) (max) Type DN ØA ØB ØW ØD N Ød H S B1 - DN 80 80 78 160 200 122 18 13 35 145 35 52 52 B1 - DN 80/8 80 78 160 200 122 18 13 35 150 35 52 52 B1 – DN 100 100 98 180 220 142 18 14 35 155 35 52 52 B1 – DN 125 125 124 210 250 172 18 17 40 175 40 76 76 B1 – DN 150 150 149 240 285 195 22 17 40 195 40 76 76 B1 – DN 175 175 174 270 315 225 22 18 40 210 40 76 76 B1 – DN 200 200 198 295 340 250 22 30 60 245 60 76 76 B1 – DN 250 250 249 350 395 305 12 22 32 65 270 65 91 91 B1 – DN 300 300 299 400 445 355 12 22 35 65 295 65 91 91 Figure – Dimensions of butterfly valves type B1 Licensed Copy: :FULLNAME, : DATE, Uncontrolled Copy, (c) BSI EN 50216-8:2005 – 16 – Table L P Q R (max) (max) (max) (max) Type DN ØA W ØB N Ød ØD H S B2 – DN 80 80 78 150 160 18 122 14 35 125 35 52 52 B2 – DN100 100 98 170 180 18 140 18 35 135 35 52 52 Figure – Dimensions of butterfly valves type B2 Licensed Copy: :FULLNAME, : DATE, Uncontrolled Copy, (c) BSI – 17 – EN 50216-8:2005 Table Type DN ØA ØB ØW N Ød S L (max) P (max) Q (max) R (max) C1 - DN 25 25 28 85 115 M12 35 95 35 52 52 C1 - DN 50 50 51 125 165 M16 35 120 35 52 52 C1 - DN 80 80 78 160 200 M16 35 140 35 52 52 C1 - DN 80/8 80 78 160 200 M16 35 140 35 52 52 C1 – DN 100 100 98 180 220 M16 35 150 35 52 52 C1 – DN 125 125 124 210 250 M16 40 175 40 76 76 C1 – DN 150 150 149 240 285 M20 40 195 40 76 76 C1 – DN 175 175 174 270 315 M20 40 208 40 76 76 C1 – DN 200 200 198 295 340 M20 40 219 40 76 76 C1 – DN 250 250 249 350 395 12 M20 40 244 40 76 76 C1 - DN 300 300 299 400 445 12 M20 60 270 60 91 91 Figure – Dimensions of butterfly valves type C1 Licensed Copy: :FULLNAME, : DATE, Uncontrolled Copy, (c) BSI EN 50216-8:2005 – 18 – Table Type DN ØA W ØB N Ød S L (max) P (max) Q (max) R (max) C2 - DN 50 50 51 120 125 M16 35 105 35 52 52 C2 – DN 80 80 78 150 160 M16 35 120 35 52 52 C2 – DN 100 100 98 170 180 M16 35 125 35 52 52 Figure – Dimensions of butterfly valves type C2