fisher_cavitrol III micro-flat trim cutaway valve

Fisher™ CAV III Micro-Flat Trim – Anti-Cavitation & Low Flow Control for Severe Service Valves

Explore the Fisher™ CAV III Micro-Flat Trim, designed for clean, cavitating liquid applications with pressure drops up to 241 bar (3500 psi) and very low flows. Ideal for pump recirculation, boiler feedwater, and other critical processes. Check full specs and contact Kateteco for inquiries.

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Product Overview

The Fisher™ CAV III Micro-Flat Trim is an engineered valve trim solution combining the proven cavitation control of Cavitrol™ III trim with the precision low-flow capabilities of Micro-Flat trim. Designed for clean, cavitating liquid applications, it handles extreme pressure drops up to 241 bar (3500 psi) while maintaining stable performance in very low flow conditions. This trim is ideal for severe service applications in industries like power generation, hydrocarbon processing, and water management, where cavitation damage and low-flow instability can compromise system longevity and safety. Its multi-stage design divides the pressure drop across several stages, minimizing energy release and preventing cavitation formation. The hardened materials and cage-style construction further ensure extended service life and reduced maintenance needs.

Key Features & Benefits

Cavitation Prevention: Manages high-pressure drops (up to 241 bar) to eliminate cavitation damage, protecting valve components and downstream piping.
Low Flow Precision: Enables reliable control in very low flow applications, ensuring process stability where conventional trims fail.
Robust Design: Hardened trim materials (e.g., stainless steel) provide excellent erosion resistance, while the cage-style trim allows easy inspection and component replacement without removing the valve body from the pipeline.
Protective Seat Design: Separates shutoff functions from throttling duties, safeguarding seat surfaces from high-velocity fluid damage.
Certified Compliance: Meets international standards including SIL, ATEX, PED, CRN, and NACE for safety and reliability in critical environments.
Wide Compatibility: Fits NPS 1, NPS 1-1/2, and NPS 2 valves with options for flanged, butt-weld, RTJ, threaded, or socket-weld connections.

Typical Applications

Pump Recirculation (Minimum Flow Protection)
Boiler Feedwater Systems
Condensate and Feedwater Recirculation
High-Pressure Drop Water Services
Clean, Cavitating Liquid Processes

Product Attributes

Attribute	Details
Brand	Fisher™
Trim Model	CAV III Micro-Flat Trim
Primary Applications	Cavitation Control, Low Flow
Max Pressure Drop	241 bar (3500 psi)
Flow Characteristic	Linear
Shutoff Class	Class IV & V (FCI 70-2)
Valve Sizes	NPS 1, NPS 1-1/2, NPS 2
Materials	Carbon Steel, Stainless Steel (Other materials available upon request)
Process Connections	Flanged, Butt-Weld, RTJ, Threaded, Socket-Weld
Pressure Rating	ASME Standards
Certifications	SIL, ATEX, CUTR, PED, CRN, NACE
Temperature Operating Range	Standard Temperature

Why Choose the CAV III Micro-Flat Trim?

This trim integrates Fisher’s legacy of reliability with advanced multi-stage pressure reduction technology. By controlling cavitation and enabling precise low-flow regulation, it reduces maintenance costs, minimizes downtime, and extends valve life in demanding environments. Its modular design ensures easy retrofitting and compatibility with existing Fisher Vee-Ball and other severe service valves.

For further technical details, custom configurations, or pricing information, feel free to reach out to the Kateteco sales team. We are here to help you select the ideal solution for your application needs.

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