Multiple ball valves on a test bench

Selecting the right valve goes beyond understanding the function it needs to serve. It’s also important to factor in cost efficiency, durability and maintenance considerations. In some cases, according to Lionel Maasdorp, MD at Allmech, leading South African manufacturer of boilers and supplier of water treatment components, switching from a solenoid valve to a ceramic ball valve can help to cut down on costs, while improving performance.

“Various industries, including water treatment and agriculture, make use of ceramic ball valves for a multitude of applications, usually where the demands on the valve exceed the capacity of conventional valve materials,” says Maasdorp. “The high-performance nature of ceramic valves means they often have a greater tolerance for wear resistance, corrosion, and high temperatures than many other types of valves. However, even within the category of ball valves, there are different types available for specific purposes. The Runxin ceramic ball valves that Allmech supplies are cost effective, durable, corrosion-resistant, efficient and low maintenance.”

Multiple ball valves on a test bench

For this reason, many Allmech clients are choosing to switch to ceramic ball valves from solenoid valves where possible. While the diaphragm in a solenoid valve may collect dirt as liquid moves through it, ceramic ball valves don’t have a diaphragm, meaning they are less prone to dirt build-up inside the valve.

“The electromagnet used in the solenoid coil to move or lift the internal stainless steel armature assembly also often produces a water hammering effect on the surrounding pipes when the valve is opened or closed,” says Maasdorp. “In manually operated ball valves there is also a risk of water hammer with fast-flowing media, but automated ball valves like the Runxin electronic and time-controlled models slow the closing mechanism down and prevent water hammering.”

Furthermore, in sensitive environments or where minimal wastage is an important operational requirement, ceramic ball valves can provide a better option as the design of the valve means the ball core and seat are precisely ground in pair to ensure there is no leakage. In contrast, solenoid valves are prone to seepage and blockages and need to be closely managed for leaks.

Maasdorp says that ceramic ball valves are ideal for many water-related applications, including water saving systems, industrial automatic control systems, automatic small application sewage systems, environmental protection projects, water supply and drainage, food and water treatment, and irrigation systems.

“Ceramic ball valves have many important factors that make them an excellent choice for robust applications,” he says. “They are cost effective, low maintenance, durable and their self-balancing design lowers torque and makes for smoother operation.”

The ceramic ball valve also has the advantage of small flow resistance, good corrosion resistance, good wear resistance and long lifetime, making it an excellent option for inclusion in an industrial system.

About Allmech

Allmech was founded in 1995 and has grown over two decades to become one of South Africa’s leading boiler manufacturers and suppliers to the water treatment industry. Allmech offers a comprehensive range of electrical, gas and oil-fired boilers with water treatment to suit.

With a customer base stretching from its head office in Benoni, Johannesburg, throughout Southern Africa and beyond, Allmech has become recognised as an experience end-to-end provider for clients requiring boiler plant, steam supply of all types, cooling towers, water treatment equipment and associated chemical programmes. Aside from sales to direct and distributor clients, the company’s services include technical support, repairs and maintenance, and spares sales.

Allmech is also the only authorised South African agent for Runxin valves, produced by the global Wenzhou Runxin Manufacturing Machine Co., headquartered in China.

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