The phrase "allow it to maintain" is correct and usable in written English.
You can use it when discussing the permission or capability for something to continue or preserve a certain state or condition.
Example: "We need to allow it to maintain its current performance levels to ensure efficiency."
Alternatives: "permit it to sustain" or "enable it to uphold".
(See "Australia Blocks Minmetals-Oz Deal") Without the government's objections, the board of OZ Minerals probably could not have dreamed they could swing a deal to clear all its debt but allow it to maintain its most valuable assets.
HDFC Bank is also likely to make a preferential offer to its promoter, HDFC, to allow it to maintain its shareholding in the merged entity.
According to the bankers, American is looking to put together more than $1.5 billion in debtor-in-possession financing, which would allow it to maintain its operations.
Amgen Inc. won a closely watched court battle yesterday that will allow it to maintain its monopoly on the biotechnology industry's best-selling drug.
Now, Amazon needs to prove it can build a sustainable app ecosystem that will allow it to maintain its position in the voice computing landscape; and keeping developers happy is a critical step.
The design was also given high freeboard to allow it to maintain its speed in heavy weather.
While the company is still focused on physical expansion (looking to enter at least two new cities each year), its commitment to online education has allowed it to maintain its position in the Chinese market and grow, according to a Deloitte report.
The SAM's organization allows it to maintain its indeterminate nature while producing determinate lateral organs.
– has enticed kings and governments and allowed it to maintain its curious influence over the city's evolution.
At the time, management assured the members that the group would maintain majority ownership thereby allowing it to maintain its "ethical approach to business".
Instead, the device, black and rubbery, slips over about the middle two-thirds of the phone, allowing it to maintain its sleek shape.
