A pressure activated valve for preventing fluid from flowing through an inflow control device during installation and commissioning of a production pipe of a well bore, comprising a cylinder open in both first and second longitudinal ends (102a,102b), characterized in that the pressure activated valve comprises: - a cylindrical piston moveably arranged within the cylinder, wherein the piston is hollow allowing fluid to enter into a first longitudinal end section and closed at a second longitudinal end section hindering fluid from passing therethrough, wherein the piston further comprises at least one radially arranged opening adjacent to the second longitudinal end section, - a seal arranged to interact with the piston and the cylinder, wherein either the cylinder comprises a slot for receiving and guiding a stopper which is fixed to the piston or the piston comprises a slot for receiving and guiding a stopper which is fixed to the cylinder wherein the slot (110,111) is configured to guide piston from i) a first position, wherein the piston is positioned in a pretensioned position by a spring, wherein the stopper (108,109) is abutting a first end (110a, 111a) of the slot (110, 111) and wherein the piston is arranged such that the at least one radially arranged opening and seal are located within the cylinder, thereby hindering any fluid from flowing through the pressure activated valve; towards ii) a second position by compressing the spring due to an internal pressure exerted on the piston, wherein the piston is moved in an at least partly helical path towards the first longitudinal end of the cylinder, until the stopper (108,109) is abutting a second end (110b,111b) of the slot (110,111); and thereafter towards iii) a third position by releasing the internal pressure exerted on the piston, wherein the piston is moved in a path towards the second longitudinal end of the cylinder until the stopper (108,109) abuts a third end (110c,111c) of the slot (110,111) such that the seal allows fluid to pass through the PAV. characterized in that the pressure activated valve comprises: - a cylindrical piston moveably arranged within the cylinder, wherein the piston is hollow allowing fluid to enter into a first longitudinal end section and closed at a second longitudinal end section hindering fluid from passing therethrough, wherein the piston further comprises at least one radially arranged opening adjacent to the second longitudinal end section, - a seal arranged to interact with the piston and the cylinder, - a cylindrical piston moveably arranged within the cylinder, wherein the piston is hollow allowing fluid to enter into a first longitudinal end section and closed at a second longitudinal end section hindering fluid from passing therethrough, wherein the piston further comprises at least one radially arranged opening adjacent to the second longitudinal end section, - a seal arranged to interact with the piston and the cylinder, wherein either the cylinder comprises a slot for receiving and guiding a stopper which is fixed to the piston or the piston comprises a slot for receiving and guiding a stopper which is fixed to the cylinder wherein the slot (110,111) is configured to guide piston from i) a first position, wherein the piston is positioned in a pretensioned position by a spring, wherein the stopper (108,109) is abutting a first end (110a, 111a) of the slot (110, 111) and wherein the piston is arranged such that the at least one radially arranged opening and seal are located within the cylinder, thereby hindering any fluid from flowing through the pressure activated valve; towards ii) a second position by compressing the spring due to an internal pressure exerted on the piston, wherein the piston is moved in an at least partly helical path towards the first longitudinal end of the cylinder, until the stopper (108,109) is abutting a second end (110b,111b) of the slot (110,111); and thereafter towards iii) a third position by releasing the internal pressure exerted on the piston, wherein the piston is moved in a path towards the second longitudinal end of the cylinder until the stopper (108,109) abuts a third end (110c,111c) of the slot (110,111) such that the seal allows fluid to pass through the PAV. i) a first position, wherein the piston is positioned in a pretensioned position by a spring, wherein the stopper (108,109) is abutting a first end (110a, 111a) of the slot (110, 111) and wherein the piston is arranged such that the at least one radially arranged opening and seal are located within the cylinder, thereby hindering any fluid from flowing through the pressure activated valve; towards ii) a second position by compressing the spring due to an internal pressure exerted on the piston, wherein the piston is moved in an at least partly helical path towards the first longitudinal end of the cylinder, until the stopper (108,109) is abutting a second end (110b,111b) of the slot (110,111); and thereafter towards iii) a third position by releasing the internal pressure exerted on the piston, wherein the piston is moved in a path towards the second longitudinal end of the cylinder until the stopper (108,109) abuts a third end (110c,111c) of the slot (110,111) such that the seal allows fluid to pass through the PAV.