A:the product says all This controller adoption ripples tube type spreads the feeling machine, can used for the causticity air or liquid to lie quality.The initial value of the controller is adjustable, regulating the scope 0.02-3 MPas, work pressure scope 0.05-6.3 MPas. Two:technique parameter 1:the wreath 境 WEN DU4:-5- +40 ° Cs 2:lie quality WEN DU4:0 - 120 ° Cs 3:outer shell protection grade:IP65