The 30-year-old frontman, who has been out of action for nine months after damaging knee ligaments, will not be rushed back into the first team despite returning to fitness
Murray damaged his knee ligaments in the Eagles' Championship play-off semi-final first leg against Brighton and Hove Albion in May and made his first Premier League appearance earlier this month.
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Murray scored 30 league goals as Palace sealed promotion to the top flight last season, but with Marouane Chamakh, Cameron Jerome and Dwight Gayle already in the squad, Pulis intends to ease the 30-year-old back into action.
"Glenn will be a good substitute for us for a few weeks," Pulis told The Croydon Advertiser. "I don't see him starting a game. He needs another week or so.
"We're just happy to have him on board and happy to have him part of it, but we understand he's been out for nine months."
Pulis' arrival at Palace has seen the club climb from the relegation zone and into 15th place but, with only 15 goals in his 16 games at the helm, the return of Murray will boost the manager's attacking options.