Offered with 150# ANSI, 300# ANSI and 600# ANSI Configurations
AKF-F Sight Flow Indicator
Reliable Visual Flow Verification for Industrial Applications
Flanged, Rugged, and Built for Harsh Process Environments
Product Overview
What Is the AKF-F?
The ARCHON AKF-F is a flanged sight flow indicator designed to provide instant visual confirmation of process flow in liquid service lines. Its robust cast body and multiple internal indicator options make it suitable for demanding industrial environments.
Key Purpose:
- Visual flow verification
- Process monitoring
- Troubleshooting and confirmation without instrumentation
Key Features & Benefits
Designed for Reliability and Visibility
ANSI flange ratings: 150#, 300#, and 600#
Available internal indicators:
- Drip Tube
- Flapper
- Rotator
Dual-window configurations available
Standard borosilicate glass
Optional fused glass for demanding applications.
Clear, dependable visual confirmation without electronics or moving instrumentation.
Construction & Materials
Built for Industrial Service
Cast body construction
Material options:
- Bronze
- Iron
- Carbon Steel
- Stainless Steel
Special alloys available upon request
Designed for long service life in process environments
Ideal For:
- Chemical processing
- Water and wastewater
- Industrial utilities
- General process flow observation
Indicator Options
Choose the Right Visibility Method
- Drip Tube: Ideal for low-flow verification
- Flapper: Simple mechanical indication
- Rotator: Enhanced visual movement for higher flows
- Plain View: Clear sight glass without internal indicator
Flexibility:
One body design, multiple visibility solutions.
Pressure Ratings & Standards
ANSI-Compliant Flanged Design
Standard ANSI raised-face flanges
Pressure ratings:
- 150#
- 300#
- 600#
Compatible with standard piping systems
Result:
Easy integration into existing process lines.
Size Range & Configurations
Broad Size Coverage
Nominal sizes from ½” through 14”
Dimensions consistent across:
- Plain (AKF-FP)
- Drip Tube (AKF-FD)
- Flapper (AKF-FF)
- Rotator (AKF-FR)
Note: Dimensions vary by flange rating and nominal size.
| Model | Nominal Size | A (in) | B (in) | C (in) | D (in) |
|---|---|---|---|---|---|
| AKF-FP-½ | ½” | 4-5/8 | 1-1/4 | ½ | 3-15/16 |
| AKF-FP-¾ | ¾” | 4-5/8 | 1-1/4 | ¾ | 3-15/16 |
| AKF-FP-1 | 1″ | 5-5/8 | 1-1/2 | 1 | 4-1/2 |
| AKF-FP-1¼ | 1¼” | 6-1/2 | 2-3/8 | 1-1/4 | 5-3/4 |
| AKF-FP-1½ | 1½” | 6-1/2 | 2-3/8 | 1-1/2 | 5-3/4 |
| AKF-FP-2 | 2″ | 7-7/8 | 2-7/8 | 2 | 7-3/8 |
| AKF-FP-2½ | 2½” | 9-3/8 | 3-3/4 | 2-1/2 | 8-15/16 |
| AKF-FP-3 | 3″ | 9-3/8 | 3-3/4 | 3 | 8-15/16 |
| AKF-FP-4 | 4″ | 11 | 4-3/4 | 4 | 9-1/2 |
| AKF-FP-6 | 6″ | 14-1/4 | 7 | 6 | 13-9/16 |
| AKF-FP-8 | 8″ | 16-1/8 | 9 | 8 | 18-1/16 |
| AKF-FP-10 | 10″ | 24-3/4 | 10 | 10 | 25 |
| AKF-FP-12 | 12″ | 25-3/4 | 11 | 12 | 26-5/8 |
| AKF-FP-14 | 14″ | 26-3/4 | 11 | 14 | 27-1/2 |
Typical Installation
Simple, In-Line Installation
- Flanged, inline mounting
- Vertical or horizontal flow (application dependent)
- Visual access from one or both sides
- No power or signal wiring required
Low Maintenance:
No calibration, electronics, or signal drift.
Applications
Where the AKF-F Excels
- Cooling water lines
- Chemical feed verification
- Pump discharge confirmation
- Utility and service water
- Process troubleshooting
Immediate confirmation that flow is present — no guessing.
Why Northeast Controls
Your Flow Visibility Partner
- Serving industry since 1937
- Application-driven product selection
- Custom materials and configurations available
- Engineering and technical support
- Fast response and dependable service