Description:

Body Material: 4140

O-ring Material: Viton-70 Durometer

Disk Material：Ceramic

The Multistage Pressure-Activated Vent sub is composed of pressure bypass component and lower opening component. It can convert the annulus pressure at the upper end of the packer to the annulus at the lower end of the packer, and complete the functions of pressure initiation and opening to establish negative pressure. This product must be used in conjunction with the pressure delay initiation device.