These type of Screw Tip Sets have check rings with feet or pins that lock the ring into the rotation of the feed screw, often referred to as “locking check rings”.
The ring still has lateral freedom of movement. These designs generally offer improved shot control over open rotation rings. There is little wear on the ring or screw tip face.
The abrasion is transferred from the faces to the outer diameter of the check ring and it is this wear surface that dictates the useful life of the valve.
This is any valve with a free floating ring that is not locked to the screw rotation. These are most commonly 3-piece or... Continue
These are generally considered ball-check Screw Tip sets s. The entire valve is fixed to the feed screw flow through cha... Continue