Stoppers and Nozzles

Stoppers and Nozzles

VISO isostatically pressed carbon bonded alumina graphite stoppers


VISO stoppers are the ideal choice for small to medium sized bottom pour steel foundry ladle applications. They offer the following characteristics:
• excellent thermal shock capabilities
• multiple use
• high temperature glaze giving excellent oxidation resistance
• argon injection version available
• range of fixing methods available


ROTOLOK Stopper Head


ROTOLOK stoppers offer the steel founder a reliable single use refractory component designed to operate even with the most aggressive steel grades. ROTOLOK stoppers offer excellent thermal shock resistance and are ideal for very large steel ladles.


ROTOLOK stoppers are available in a wide range of sizes to suit most stopper support rod designs or individual ladle casting practices.


In addition, various grades of ROTOLOK stoppers are available:
• ROTOLOK HR stoppers for superior erosion resistance
• Insulated ROTOLOK stoppers for enhanced protection of the metallic stopper rod
• "CVC" coated for improved opening and reduced nozzle sticking on first opening.

"Prior to our relationship with Weaver Materiel, we were purchasing riser sleeves direct from the OEM. As a stocking distributor, Weaver typically is able to deliver same or next day. OEM lead times averaged three to four weeks. With Weaver, I've been able to reduce my working inventory by about 40%."

- JD Schmidt, QA Manager, Ohio Ferrous Foundry

“Ashland Foundry & Machine Works and Weatherly Casting are grateful for the partnership in our working relationship with Weaver Materials.  Weaver has helped us maintain pricing and avoid increases in a volatile market.  Weaver has always kept us in supply of material when markets dictated shortages/allocation status.  If Weaver was not in our vendor pool daily production ability would have been negatively impacted.  Weaver is also technically able to review our foundry processes and make suggestions to either achieve a cost savings or process improvement.  I am looking forward to a continued collaboration between the Weaver team and my locations.”
- Chrissy C