Water treatment specialist Allmech has expanded its product range with the introduction of large stainless steel ceramic core ball valves, which are now available in South Africa from the company’s Benoni-based premises.

The ceramic core ball valve design is intended to address some of the common challenges associated with mining applications, where valves often suffer from wear owing to high pressures, abrasive materials and chemical exposure.

Allmech MD Lionel Maasdorp expects increased adoption of these valves within the local mining industry, particularly in applications involving corrosive and high-pressure fluid handling.

He explains that as mining companies seek more reliable, low-maintenance valve solutions, Allmech’s ceramic core ball valve range may offer a compelling alternative to traditional options.

These valves are designed for high-pressure applications and offer enhanced durability as well as corrosion resistance, making them well-suited for use in mining operations that handle abrasive and corrosive fluids, he tells Mining Weekly.

While the ceramic core ball valves are a relatively new addition to the market, Maasdorp says they have already demonstrated success in industrial applications, including in petroleum and allied industries in Asia.

Maasdorp believes that these valves’ performance in these sectors suggests they will be a reliable option for mining operations in South Africa, and beyond.

“Given their track record, we are confident that these valves will rival the reliability of any other high-performance valves currently available,” he says.

The introduction of ceramic core ball valves forms part of Allmech’s broader strategy to strengthen its presence in the mining sector.

The company already supplies multi-flow control valves with flow rates ranging from 2 m³/h to 50 m³/h, and the addition of the larger ceramic core ball valves is expected to provide mining companies with an alternative to traditional valve technologies.

“We aim to offer the mining industry a robust, long-lasting valve solution that meets the unique demands of their operations,” Maasdorp explains.

He further notes the development of these valves stems from the success of Chinese filter and valve manufacturer Runxin’s ceramic core multi-flow filter valves.

“The increased demand for these valves resulted in the establishment of a dedicated production company – Runjing, which now manufactures the ceramic core ball valves,” he explains.

Runxin’s multi-flow filter valves demonstrated strong performance in various industries, leading to the development of ceramic core ball valves as a complementary product line.

Maasdorp explains that the unique manufacturing process of these valves results in a low- friction seal, allowing them to be opened and closed more easily, even under high-pressure conditions – a factor particularly important in mining operations where reliable valve performance is critical to maintaining process efficiency.

The new range includes stainless steel, production pressure operated or unplasticised polyvinyl chloride valve options. The internal components, including the ball, core and seats, are manufactured as matched pairs, ensuring zero leakage.

In applications requiring enhanced acid resistance, the standard alumina ceramic core can be substituted with silicon carbide, while Hastelloy connector pins can be used for additional durability.

Mining Considerations

Reliability and ease of maintenance are key concerns for the mining industry, where unplanned downtime can have significant cost implications.

Maasdorp explains the ceramic core ball valves are designed to reduce maintenance requirements, helping to improve plant efficiency, while automated versions of the valves, which are equipped with electric actuators, facilitate seamless plant automation.

“Automation enables real-time monitoring and control of valve operations, with open and closed position signals providing confirmation that the valve is functioning as expected,” Maasdorp says.

The ability to remotely control these valves can improve safety and efficiency in mining plants, particularly in operations involving hazardous materials, he adds.

To ensure that the valves meet industry standards for reliability and performance, they undergo extensive testing during the manufacturing process, with Maasdorp pointing out that there are 20 inspectors overseeing 18 different measuring standards to verify quality.

The ceramic components go through 15 separate processes, while the metal and plastic components are subjected to five different testing protocols. Electronic components, where applicable, undergo 32 tests, he says.

These rigorous quality control measures include assessments of concentricity, ceramic hardness and leak prevention, as well as durability trials simulating one-million duty cycles at 6 bar pressure.

Where the valves are fitted with electrical actuators, additional tests are conducted to ensure water resistance and proper functionality.

“Our longstanding relationship with Runxin and Runjing has shown us that continuous product innovation is driven by constructive customer input. Over the years, this has led to significant advancements, including the development of large disc filters and flow control valves for the agricultural sector,” Maasdorp says.

Similar improvements may be made to the ceramic core ball valve line as new industry requirements emerge, he concludes.