Goss
Goss FM-100F Brass Nitrogen Flowmeter
- SKU:
- FM-100F
- Availability:
- Allow 2-3 Days to Ship
- Weight:
- 1.25 LBS
Description
Goss FM-100F Brass Nitrogen Flowmeter
Goss FM-100F Brass Nitrogen Flowmeter provides precise, visible control of nitrogen flow for HVAC and refrigeration brazing, purging, and service applications. Designed to help maintain a controlled nitrogen sweep through tubing during brazing, the FM-100F helps reduce oxidation and scale formation inside copper lines while conserving nitrogen through adjustable flow control.
The flowmeter features a solid brass body, a visible round steel flow ball, and an adjustable range from 0 to 75 SCFH. Flow is calibrated at 50 PSI regulator inlet pressure, and standard 1/4" flare (7/16"-20) inlet and outlet connections provide compatibility with common HVAC service setups.
Product Highlights
- Professional nitrogen flowmeter for HVAC and refrigeration service
- Designed for brazing and nitrogen-purging applications
- Provides visual confirmation of nitrogen flow through tubing
- Helps reduce oxidation and scale formation inside copper lines during brazing
- Adjustable flow helps conserve nitrogen
- Flow range from 0 to 75 SCFH
- Calibrated at 50 PSI regulator inlet pressure
- Solid brass body for durability
- Visible round steel flow ball provides clear flow indication
- Standard 1/4" flare (7/16"-20) inlet and outlet connections
- Internal auto-reset safety feature helps protect against over-pressure
- Manufacturer part number FM-100F
Technical Specifications
| Manufacturer | Goss |
|---|---|
| Part Number | FM-100F |
| Product Type | Nitrogen Flowmeter |
| Gas Service | Nitrogen |
| Flow Range | 0 to 75 SCFH |
| Calibration Pressure | 50 PSI Regulator Inlet Pressure |
| Body Construction | Solid Brass |
| Flow Indicator | Visible Round Steel Flow Ball |
| Inlet Connection | 1/4" Flare (7/16"-20) |
| Outlet Connection | 1/4" Flare (7/16"-20) |
| Safety Feature | Auto-Reset Internal Over-Pressure Protection |
| Primary Applications | HVAC Brazing, Refrigeration Brazing and Nitrogen Purging |
Controlled Nitrogen Flow
0–75 SCFH Adjustment
The FM-100F provides an adjustable nitrogen flow range from 0 to 75 SCFH, allowing the technician to set the flow required for brazing, purging, and related HVAC or refrigeration service work.
Visual Flow Confirmation
A visible round steel flow ball provides a clear indication that nitrogen is moving through the flowmeter and connected tubing during service.
Helps Reduce Internal Oxidation
Maintaining a controlled nitrogen flow through copper tubing during brazing can help reduce the formation of oxidation and scale inside the line. The FM-100F gives technicians a visible way to confirm and adjust nitrogen flow during the brazing process.
Designed to Conserve Nitrogen
Rather than supplying unrestricted gas flow, the FM-100F allows nitrogen delivery to be adjusted to the needs of the application. Controlled flow can help reduce unnecessary nitrogen consumption while maintaining an appropriate purge through the tubing.
50 PSI Calibration
The published flow range is calibrated with a 50 PSI regulator inlet pressure. For accurate flow indication, use the flowmeter with an appropriate nitrogen regulator and service setup consistent with the specified calibration conditions.
1/4" Flare Connections
1/4" Flare Inlet
The FM-100F uses a standard 1/4" flare (7/16"-20) inlet connection for attachment to compatible nitrogen regulator and service equipment.
1/4" Flare Outlet
The outlet also uses a 1/4" flare (7/16"-20) connection for convenient integration with compatible hoses, fittings, and HVAC service setups.
Auto-Reset Safety Feature
The FM-100F incorporates an internal auto-reset safety feature designed to help protect the flowmeter against over-pressure conditions. This feature adds protection to the flowmeter during compatible nitrogen-service applications.
Common Applications
HVAC Brazing
- Copper-line brazing
- Nitrogen sweeping during brazing
- HVAC installation
- HVAC repair and maintenance
- Tube and fitting work
Refrigeration & Purging
- Refrigeration system brazing
- Nitrogen purging
- Controlled line flushing
- Service and maintenance work
- Professional refrigeration applications
Flowmeter Selection Considerations
Confirm that the nitrogen regulator, inlet pressure, flare fittings, hoses, and downstream equipment are compatible with the FM-100F before ordering. The flowmeter is calibrated at 50 PSI inlet pressure and uses standard 1/4" flare connections on both the inlet and outlet.
Goss Torch Equipment Catalog
Refer to the Goss Torch Equipment Catalog for additional FM-100F information, compatible nitrogen regulators, service fittings, and related Goss HVAC and refrigeration equipment.
California Proposition 65 Warning
WARNING: This product may expose you to chemicals, including brass and lead compounds, which are known to the State of California to cause cancer and reproductive harm. Wash hands after handling.
Need Help Selecting Nitrogen Service Equipment?
Our industrial specialists can help review your nitrogen regulator, required flow range, flare connections, and HVAC or refrigeration brazing setup before you order.
Frequently Asked Questions
What is the Goss FM-100F used for?
The FM-100F is designed to control and visually indicate nitrogen flow during HVAC and refrigeration brazing, purging, and related service applications.
What is the flow range of the FM-100F?
The adjustable nitrogen flow range is 0 to 75 SCFH.
At what pressure is the flowmeter calibrated?
The FM-100F is calibrated at 50 PSI regulator inlet pressure.
Why is nitrogen used during copper brazing?
Controlled nitrogen flow through the tubing helps reduce oxidation and scale formation inside copper lines while they are being brazed.
How can I tell whether nitrogen is flowing?
The FM-100F uses a visible round steel flow ball to provide visual confirmation of nitrogen flow.
What connections does the FM-100F use?
Both the inlet and outlet use standard 1/4" flare connections with 7/16"-20 threads.
What is the FM-100F body made from?
The flowmeter features a solid brass body designed for professional service.
Does the FM-100F have over-pressure protection?
Yes. The flowmeter includes an internal auto-reset safety feature designed to help protect against over-pressure.
Can the FM-100F help save nitrogen?
Yes. Its adjustable flow control allows nitrogen delivery to be matched to the application rather than supplying unnecessary unrestricted flow.
Important Ordering Notes
- Manufacturer part number: FM-100F.
- Designed specifically for nitrogen service.
- Flow range is 0 to 75 SCFH.
- Flow is calibrated at 50 PSI regulator inlet pressure.
- Features a solid brass body.
- Uses a visible round steel flow ball for flow indication.
- Inlet connection is 1/4" flare (7/16"-20).
- Outlet connection is 1/4" flare (7/16"-20).
- Includes an internal auto-reset safety feature for over-pressure protection.
- Designed for HVAC and refrigeration brazing and nitrogen-purging applications.
- Confirm regulator pressure, fittings, hoses, and downstream-equipment compatibility before ordering.
- Use only with compatible nitrogen-service equipment.
- Follow applicable compressed-gas, brazing, HVAC, and workplace safety procedures.
- Refer to the Goss Torch Equipment Catalog for additional product information.
