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Product Category: Ball Valves

Floating ball valves, trunnion mounted or fully lined ball valves. These valves are used for isolation, on/off and control applications in all process plants.

NAF – Duball DL Ball Valve

High-Performance Full-Bore Isolation and Control

The NAF-Duball DL is a full-bore, metal or soft-seated ball valve engineered for isolation, on/off and modulating control in demanding industrial services. Its split-body construction, spring-loaded stem packing, and bidirectional sealing deliver reliable shut-off and stable operation, even with difficult media and high differential pressures. A blowout-proof stem, rigid seat designs, and a robust torque path ensure consistent performance, while the off-centre body joint enables fast seat and ball replacement without removing the actuator. With direct mounting of the NAF-Turnex actuator and full integration with the NAF-D30 intelligent positioner, the Duball DL provides a compact, vibration-resistant valve package suitable for severe service across chemical, pulp & paper, mining, petrochemical and power applications.

For technicians, engineers and production managers, this means:

  • Reliable long-term sealing – Spring-loaded stem packing provides stable, maintenance-free operation in automated and control services.
  • Consistent shut-off under demanding process conditions – Floating ball design delivers bidirectional tightness, even with challenging media.
  • Reduced downtime during shutdowns – The off-centre body joint allows seat and ball replacement without removing the actuator, simplifying maintenance.
  • Stable torque transmission – Blowout-proof stem with long foot minimises backlash, ensuring predictable operation and accurate control.
  • Flexible trim and material options – Reinforced PTFE seats, Alloy 6 metal seats, sealed or scraper designs, and high-temperature variants address a wide range of duties.
  • Optimised for automation and control loops – Direct mounting of NAF-Turnex actuators and optional NAF-D30 positioners creates a compact, vibration-resistant valve package.
  • Improved process stability in high-energy applications – Optional Z-trim reduces cavitation and noise, protecting downstream equipment.

Our Valve Repair Centres in Secunda and Durban provide expert repair, reconditioning, automation and testing services, ensuring that your NAF-Duball DL valves remain in peak condition.

Robust design. Stable operation. Lower maintenance effort. 

Richter – KN PFA Lined Ball Valve

Heavy-Duty Corrosion Protection and Shut-Off

The Richter KN PFA-lined ball valve is engineered for reliable shut-off and control in aggressive, corrosive and metal-reactive chemical duties where metallic valves cannot maintain long-term sealing integrity. Its thick fluoropolymer lining, robust ductile iron or steel body, and ENVIPACK stem sealing system deliver dependable performance under thermal cycling, vacuum conditions and high-corrosion environments.

Designed as a modular valve family—including KN, KNA, KNR, KNAR and KA-N variants—the series supports shut-off, control and drain duties from a single platform. This allows engineers to standardise on one system while specifying different body configurations, end connections and automation options to suit process requirements. PFA or antistatic PFA-L linings provide proven permeation resistance and protect wetted parts in applications involving strong acids, halogenated compounds, pickling solutions and high-purity chemicals.

Its low operating torque, high dimensional stability and actuator compatibility help maintain operational reliability across chemical production, minerals processing and high-purity manufacturing environments.

With decades of proven performance in acid, HF, HNO₃, pickling, and ultrapure chemical services, the Richter KN series is the go-to choice when standard materials fall short.

For technicians, engineers and production managers, this means:

  • Longer service life — Thick PFA/PFA-L lining and ENVIPACK stem sealing reduce chemical attack and minimise wear in corrosive or metal-reactive media.
  • Reliable shut-off and control — Precision ball and seat geometry maintain tight isolation and stable throttling under varying process conditions.
  • Lower maintenance effort — Zero-adjustment stem sealing and corrosion-resistant construction reduce intervention frequency and maintenance downtime.
  • Improved plant availability — Durable lining anchoring and robust body design limit failures caused by blistering, permeation or thermal distortion.
  • Operational flexibility — Modular variants (KN, KNA, KNR, KNAR, KA-N) allow one valve family to cover shut-off, control and drain applications across the plant.
  • Reduced environmental risk — ENVIPACK low-emission stem sealing supports fugitive-emission compliance in hazardous and regulated areas.
  • Simplified automation — Low torque requirements ensure compatibility with pneumatic and electric actuators without compromising sealing integrity.
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