Dear Khun Chawin,
We can provide the gave saver range 5-25 Barg with surcharge expasive.
Under normal pressure conditions the spring holds the valve open. When the system pressure exceeds the set pressure (5.5 Barg) , the force exerted by the spring is overcome and the valve closes.
If you need to use the gave saver range 5-25 Barg , we will revise quotation for you.