Linear and Quarter-turn Industrial Valves

Linear and Quarter-turn Industrial Valves

Various valves are designed and used for multiple roles in process control. Linear and quarter-turn valves are two types of valves used to regulate and control fluid flow in the industry. Their design and construction reflect the intended use of the valves, with each suited to a different class of service. 

All valves work by controlling the position of an internal structure that obstructs fluid passage to some extent. In general, fluid flow at the valve classifies as unrestricted (valve fully open), stopped (valve fully closed), or throttled (valve partially open). The operational requirements of the process will determine whether only two of those conditions (fully open and fully closed) or all three are required. When choosing an appropriate valve, the fluid, the process, and the surrounding environment must be considered. It is not always a simple task. 

Linear valves distinguish themselves using straight-line motion to position the valve plug, disc, diaphragm, or other flow controlling elements. The linear valve trim's shape, size, and arrangement provide the operator with a flow range through the valve. The linear valve's positioning allows it to regulate fluid flow slower but more accurately. Linear motion valves include gate and fixed cone valves—linear valves best suit flow control.

Quarter turn valves move from fully open to closed by rotating a shaft connected to the controlling element 90 degrees. Their relatively simple operation allows for a rugged and compact design. The ability of quarter-turn valves to quickly reposition from open to closed positions is one of their distinguishing features. The torque required to operate the valves is typically low to moderate. Quarter turn valves include ball and butterfly valves. 

Depending on the situation, linear valves and quarter-turn valves are the best choices for specific process environments. The linear valve's accuracy and ability to move in a linear fashion rather than a quarter-turn come with easy maintenance and a lower likelihood of cavitation. Both valve types are widely used and are not competing for the same application. Each excels in a specific set of applications.

Alfa Laval's Unique Mixproof 3-Body Sanitary Valve

Alfa Laval's unique Mixproof 3-Body valves allow for the simultaneous flow of two different products or fluids through the same valve without the risk of cross-contamination. The valve also includes a changeover function. 

The Mixproof 3-Body valve offers optimal process flow, exceptional hygiene, maximum uptime, and a low total cost of ownership. Its modular, three-valve-body design ensures reliable fluid handling and safety, making it ideal for use as a hygienic changeover valve. The Mixproof 3-Body valve translates into significant cost savings and increased efficiency.


  • Operating spillage-free
  • Simplified maintenance
  • High level of hygiene
  • Outstanding safety level
  • Based on proven platform

Alfa Laval manufactures sanitary valves and automation. Customers trust Alfa Laval valves in the food, biopharma, life science, pharmaceutical, and cosmetic industries for process performance and hygiene in the most demanding applications.

For more information about Alfa Laval valve products in Northern California and Northwestern Nevada, contact CTi Controltech by calling 925-208-4250 or visit

Flowserve Valve, Actuation and Instrumentation Product Portfolio

Flowserve Valve, Actuation and Instrumentation Product


Flowserve offers a comprehensive range of quarter-turn, rotary, linear, control, and specialty configurations. Every valve manufactured is built with unwavering performance, long service life, and safe operation in mind. Flowserve also provides precision actuation and instrumentation for all applications, including remotely controlled, fully-automated electric, hydraulic, and pneumatic actuators, as well as electronic positioners and level switches. In most hazardous environments, fail-safe isolation, on-off modulation, and precision process control ensure efficient and reliable operation. Every intelligent flow control solution provides industry-leading performance and reliability, with embedded technologies that make them simple to use and maintain. You'll get end-to-end intelligence that maximizes your uptime by combining our control solutions with real-time system analysis, predictive maintenance, and remote service capabilities.

CTi Controltech Proudly Representing BS&B Safety Systems in Northern California and Nevada

CTi Controltech Proudly Representing BS&B

Since designing the first rupture disk (bursting disc) in 1931, BS&B Safety Systems, continues to set the standard for pressure release and flame suppression products. Their experienced engineering staff and certified craftsmen assure you of a reliable, cost effective, technologically advanced, code compliant product. 

BS&B Safety Systems manufacturing facilities operate and test according to national, international standards and codes including ASME VIII, AD Merkblatt A1 and EN ISO 4126-2: Bursting disc safety devices. Don't settle for an imitation - use BS&B rupture disks, explosion vents, pressure relief valves, and related safety products. 

BS&B Product Include:

  • Rupture Disks (Bursting Discs)
  • Graphite Disks
  • Safety Heads
  • Explosion Vents
  • Sensors & Monitors
  • Buckling Pin Relief Valves
  • Explosion Vents
  • Sensors & Monitors
  • Safety Relief Valves
  • Flame Arresters

CTi Controltech represents BS&B products in Northern California (the counties north of and including Monterey, Kings, Tulare and Inyo) and Nevada (the counties north of and including Esmeralda, Mineral, Churchill, Lander, Eureka and White Pines).