Flanged Float Control - CFF21M-H2 | Cla-Val

Cla-Val CFF21M-H2 Flanged Float Level Switch

The Cla-Val CFF21M-H2 is a float-operated level switch from the CFF series, designed for use in fuel-water filter separators and aviation fuel supply systems. The CFF series is applied for level control in fuel-water separation processes, including Av-Gas, JP-5, and Diesel fuel service.

Functional Role

The float monitors the separated phase level inside the filter separator. The output can be integrated into system logic for:

• automatic water drainage,
• fuel shutoff control,
• protection of downstream equipment from water carryover,
• separator operation monitoring in marine fuel systems.

This is not a flow control valve. It is a level control device and should be specified in conjunction with the separator’s drain/shutoff circuit.

Technical Application Data

• Type: Flanged Float Control
• Model: CFF21M-H2
• Application: fuel-water filter/separators
• Media: Av-Gas, JP-5, Diesel fuel
• System Specification: MIL-F-15618 (SHIPS), Class 1
• System Function: automatic drain and fuel shutoff controls
• Connection: flanged
• Piping: sil-brazed nickel-copper pipe

Difference from CFF18MT-H2

The CFF18MT-H2 is explicitly designated as the with Tester version. For CFF21M-H2, no tester indication appears in the quick reference catalog; tester requirement must be confirmed via the final datasheet or fuel system specification.

Selection Criteria

Selection should be based on filter separator type, fuel compatibility, actuation level, flange connection, drain/shutoff control configuration, and compliance with marine or industrial specifications.

Maintenance

Inspection includes free float movement, chamber cleanliness, flange sealing integrity, nickel-copper piping condition, and verification of response to actual or simulated water level.