mumbai, Feb. 19 -- Global private equity majors and strategic infrastructure investors including Macquarie, Actis, Blackstone and Sembcorp are preparing to bid for a controlling stake in Welspun Group's clean-energy arm, Welspun New Energy, at a valuation higher than was estimated just three months ago, people familiar with the development said. "The company is seeking around $250 million in value. With a lot of consolidation that has happened in the sector recently, the valuation expectations have inched up," one of the persons cited above said Binding bids are expected soon, one of the persons said on the condition of anonymity. "Large PE firms and some strategics are likely to bid," this person said. Mint reported on 18 November of the c...