SK™ two-way pipeline conveying valve

Product Announcement from FLSmidth

The FLSmidth Type SK™ two-way pipeline valve provides positive and dependable switching of material flow in pressure pneumatic conveying pipelines. There are numerous applications suitable for a wide variety of materials such as cement, limestone, bentonite, barite, talc and other similar ground or pulverized materials. Available for manual, air cylinder or electric motor operation.

The SK two-way pipeline valve is available in eight standard sizes; 3 through 6-inch (75 through 150 mm) valves match I.D. of standard pipe; 8 through 14-inch (200 through 350 match I.D. of standard Schedule 30 pipe. Available in right hand or left hand mounting.

Body -Durable cast iron construction.

Disc -The internal mechanism works on the sliding disc and port principle. Hardened seats and discs resist abrasion and are lapped to maintain a positive seal at the closed port.

Motor -Motor operation features a built-in mechanical brake for accurate positioning of the valve seal disc. Motor electrical requirements are 3 phase, 60 Hz., 230/460 V.

Air - Heavy-duty air cylinder actuator with dual solenoid, 120V NEMA 4, pre-piped

Accessories -Limit switches for position indication are standard on air cylinder and motor-operated valves; optional on manually operated valves.

Special Application -High temperature 850°F (455°C), NFPA-85F design, alternate materials, voltages.


  • New design is interchangeable with existing actuators
  • Redesigned for servicing in place
  • New larger access port designed for quick seat and disc replacements
  • Hinged port
  • Replaceable seat cartridge
  • Replaceable disc
  • O-ring sealed under cartridge
  • Location pins for quick cartridge changeout
  • 8”, 10”, 12” and 14”
  • New design is dimensionally interchangeable with standard design
  • Spring-loaded linkage for reliable disc positioning


  • Hand, motor, air operators are standard
  • Sizes 8” to 14”
  • Left or right hand mounting
  • 45° diverter leg
  • Heavy cast iron construction
  • 50 psi seal tested
  • Standard flange drilling
  • High temperatures to 850°F
  • Abrasion resistant design
  • Explosion proof operators
  • NFPA 85f version available