Downhole pump down plug (PDPC)

O ring is a type of seals with solid rubber material or PTFE and an O-shaped cross section.

The JST valve insert seal is mainly used for sealing valve seat of fracturing pump. It is made of modified polyurethane material of excellent extrusion resistance, puncture resistance and fatigue resistance, which guarantees the fracturing work under various working conditions.

DLI is a dust resistance and oil-scraping double acting seal. Consist of PU and iron material.

T-seals are three piece seals with an elastomeric lip and hard plastic anti-extrusion rings, it is proved to be of long time service. The standard design will fit into an o-ring gland and can be machined or net moulded.

A seal assembly for use in a wellbore tool, it acts as a flow restrictor protecting a lower end of the seal assembly from high pressure and/or high volume flow.

VT type V Packing is widely used for sealing pistons and rods with both single and double acting cylinders.

JST's Inner and Outer BOP Seals could be made according to customer requirements. These seals are used in various type of Blow Out Preventors (BOP's).

JST FHR series is  made of a helical wound spring and a polymer jacket, which is mainly used for rod.