By Francis Kan SINGAPORE (Reuters) - Brent crude was lower on Tuesday, weighed down by lingering concerns over the health of the global economy, the Greek debt crisis and a stronger dollar. ICE Brent crude fell 25 cents to $111.14 a barrel by 0439 GMT. U.S. crude was at $94.71 a barrel, down 23 cents. The market's optimism over efforts by European policymakers to approve an emergency bailout for Greece was tempered by Standard & Poor's negative view on the private sector involvement in a second Greek bailout package. "There's been a good flow of economic data that has helped oil prices and if that can continue this week we can expect more upside," said Ben Le Brun, market analyst with CMC Markets in Sydney. "But there are concerns still there, including the U.S. debt ceiling and also the softer Chinese data." The rally in equities which had helped support oil prices in recent sessions took a breather, as Asian stocks steadied near one-month highs on Tuesday after five consecutive days of gains. DATA, RISKS, TECHNICALS U.S. Treasury Secretary Timothy Geithner has warned of huge risks if Congress fails to raise the $14.3 trillion debt ceiling by August 2, potentially triggering a default that could send shivers through an already-fragile banking system. Adding to the market's nervousness are signs of a slowdown in China, after data last Friday showed the country's factory sector grew at its slowest pace in 28 months.

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