Rotary Control Valves.

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  • The Duball DL is a high-performance, metal-seated, full-bore ball valve, equally suitable for isolation, on-off and modulating control applications. The excellent characteristics of NAF Duball DL are particularly beneficial under the most challenging operating conditions in the process industry, where difficult media and demanding pressure conditions make severe demands on the design, materials and performance.
    Metal Seated Split-Body Full Port
  • The NAF Duball DL Ceramic is a ball valve that is internally lined with ceramic for erosive and abrasive media. It is primarily intended for control but has a sealing class as for a shut-off valve. The valve represents a concrete result of our product philosophy which is focused on functionality, high quality and low life cycle costs, and is based on concentrating our range to a limited number of valve types, but all of them suitable for a wide variety of applications.
    Ceramic Lined
  • The NAF Duball DL Pocket Valve is the pulp and paper industry’s choice for a reliable and robust valve solution that allows for safe removal of sand or debris in separator and junk trap applications during normal process operation. Building on years of experience in providing flow control solutions in harsh environments, the Duball DL Pocket Valve is specifically designed to ensure continuous process uptime and throughput by allowing process pressure to be maintained while unwanted process particles are eliminated.
    Full Port Pocket
  • The MaxFlo 4 is a high-performance eccentric rotary plug control valve. The flow path is unobstructed by the shaft, allowing higher capacity for a given valve size. This noncrossover shaft design also eliminates shaft damage from erosive process fluids. The shaft is designed per ASME B16.34 Section 6.5 to prevent the stem from being removed while the valve is under pressure for increased safety.
    Eccentric Plug
  • Setball Segmented Ball Valves are cost-competitive general service valves that offer excellent rangeability and high-flow capacity. NAF Setball can be used in a wide variety of applications and meets the highest demands for control accuracy provided by the equal percentage characteristic and the splined connection between shaft and sector.
    Segmented Ball CL150-300
  • The NAF Setball for Middle Consistency (MC) pulp is a ball sector valve with metal-to-metal seating and combines the best control characteristics of the ball valve and the butterfly valve. It can be used both as control valve and as shut-off valve and is available in flanged version. This valve type is developed for MC-pulp 8-19%. It has an enlarged outlet with one size bigger flange on the outlet to get an excellent flow characteristic for the MC-pulp out of the valve. It is available as standard in 1.4408/CF8M, CG8M and SMO254.
    MC Pulp Segmented Ball CL150-300
  • NAF Setball ProCap Segmented Ball Valves are unique high-tech capping valves designed for automated filling of wood chips for batch digester applications in the pulp industry.
    Capping Valve
  • The NAF Setball SF valve is a cost-competitive, compact, rotary control, V-port ball sector valve that offers excellent rangeability and high-flow capacity. In comparison to the NAF Setball, the Setball SF offers a compact design with a short face-to-face.
    Short Face Segmented Ball CL150-300
  • The Valtek ShearStream is a segmented, ball control valve that provides exceptional control and rangeability for the process industries. Designed to overcome the problems of harsh, particle entrained processes, ShearStream also provides accurate, reliable control in a broad range of applications, such as chemical, power and petroleum.
    Segmented Ball CL150-600
  • Valbart designed the Trunnion Mounted Control Ball Valve (TMCBV) to operate at high pressures while minimizing the torque needed to operate the valve. The spring-loaded, process energized seats offer tight (Class IV and Class V) shutoff at any pressure. In most cases, the TMCBV's capacity is greater than that of a comparable globe valve. This allows the customer to use a smaller, lighter valve and experience cascading savings. This valve also requires a smaller, less expensive actuator and less expensive pipe supports.
    Trunnion Mounted Ball Control
  • The NAF Torex, High-Performance butterfly valve is available with either metal-to-metal or soft seats. Due to its unique design and triple offset, it closes extremely tight. It can be used both as a control valve and as a shut-off valve.This valve can be supplied in either wafer or lugged versions. The valves are also available in other materials e.g. Carbon steel, and Titanium, other stainless steel materials and in Fire-safe design.
    Triple Offset
  • The NAF Trunnball DL is a full-bore trunnion-mounted ball valve, developed by Flowserve engineers with more than 80 years of experience manufacturing ball valves. The ball is supported by two large, low friction trunnion bearings for consistent low torque even at high differential pressures. Due to its bi-directional tightness, low friction and high controllability, it is an excellent choice for isolation, on/off and modulating control applications.
    Full Port 2-Piece
  • The Valtek Valdisk valve is a high-performance butterfly control valve. Its double-offset shaft provides eccentric-cammed disc rotation to lift it out of the seat, thus immediately eliminating seat friction, to improve throttling control and reduce seat wear. A one-piece splined shaft connected to a clamped actuator lever provides excellent throttling control. Its soft seating arrangement is designed for bubble-tight shutoff while maintaining low breakout torque.
    Double Offset High Cv
  • The Valtek Valdisk BX is a double offset butterfly control valve designed to meet the most routine and the most rigid service requirements. Adopted from Flowserve's Durco BX product, the Valdisk BX offers a proven design and variety of configurations for seating, packing and materials.
    Double Offset
  • The Valdisk TX3 is a high performance triple offset butterfly control valve capable of closing with zero leakage. The precision seat and seal are machined at an offset angle creating even seat loading around the entire seat ring and eliminating rubbing between the seat and seal during opening and throttling. This design provides repeatable long-lasting zero leakage shut-off.
    Triple Offset