Find selection with dynamic value having space

like 'ltrY2axisTopUp Acmount'
I have 

`var val = 'ltrY2axisTopUp Acmount'`
now i want to find like this

```
$(':input[value=' + val + ']')

```

It says 

```
Error: Syntax error, unrecognized expression: #lsltrY2axis option[value=ltrY2axisTopUp Acmount]

```