This is our most popular valve design. It is the freest flowing, and the most economical valve.
Advantages of 3 Piece Ring Valves
High Quality Tool Steel
Our valves are constructed of high quality tool steel. Tool steel, while wear resistant, has an exceptional ability to absorb twisting and bending without fracturing.
Nitride Case Hardening
All ring valves are first through hardened, and then nitride case hardened to provide high wear resistance.
Sturdy Design
Ring geometry is designed for high strength and low edge stress concentration to eliminate the possibility of cracking. The tapered front seat of the valve body and generous radii reduce stress concentrations making a strong valve body which is even more resistant to fracturing.
Free Flow Design
All valves are designed to process heat sensitive polymers without excessive sheer to the material. All sharp edges and corners are rounded off, and the flow surfaces of the valve assembly are highly polished.
Tuned Response Rings
Ring valves are offered in a variety of compressions (low, medium, or high) to specifically suit customer's molding needs.
Precision Ground Mating Surfaces
The sealing surfaces of the valve are precision ground to assure exact size and concentricity so the valve will shut off and seal with perfection.
Special Materials and Coatings
In addition to our standard SKD61 valves, we also offer valves made of extremely wear resistant H13. This special steel, when heat treated and nitride case hardened, provides unparalleled wear resistance for glass filled applications.
For larger valves that demand extreme wear resistance, Yashi Screw recommends its Silver Bullet hard faced valve assembly. This valve has high wear resistance alloys that are welded into the contact surfaces of the valve assembly.
Yashi Screw also offers an array of coatings, treatments, and special designs to suit your needs.