Protractor Slider set aria-valuenow for testing

I have a slider object, and need to test it via protractor.

This is the code of slider

<div id="slider1_max-slider-handle_div" tabindex="0" aria-valuenow="93.3" style="top: 6.7%;" aria-valuemax="100" aria-valuemin="0" role="slider" class="slider-handle max-slider-handle custom"></div>

I've tried to set values on slider via:

 browser.driver.actions().dragAndDrop(element(by.id('slider1_max-slider-handle_div')), {x:0, y:0}).perform();

But it is not working... Slider is moving but on some strange positions.

Basically I need to set a value, for example '50' and want to move slider to this positions (which is set in aria-valuenow).

Is there any way how to perform it?