Packing ring

• Filling ring working principle: the gas enters the cup groove of the packing box from the axial gap, the gas pressure makes the packing ring and the piston rod surface and the cup groove section to form a seal, when the gas pressure is not present, the spring force acts on the packing ring, and the ring lobe is combined around the piston rod. The packing ring group can float freely in the cup groove to compensate for the radial runout of the piston rod. The relative position between the sealing rings is fixed with a pin/hole structure, and the incision gap of the tangential ring is covered radially to close the leakage path.