supply of ball valve/ drain valve 90 square mm, 1 [ball valve/ drain valve 90 square mm, 1 1/4 suitable for 3-phase loco main transformer as per abb id no. hstn 422368. note: one sample should be got approved before effecting bulk supply.]ball valve/ drain valve 90 square mm, 1 [ball valve/ drain valve 90 square mm, 1 1/4 suitable for 3-phase loco main transformer as per abb id no. hstn 422368. note: one sample should be got approved before effecting bulk supply.],ball valve/ drain valve 90 square mm, 1 1/4 suitable for 3-phase loco main transformer as pe r abb id no. hstn 422368. note: one sample should be got approved before effecting bulk supply. [ warr anty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]