Heavy-wall stainless steel
SS 304 / SS 316 barrel and flanges form the main body of the inductor.
Flanged inductor with pickup valve, reinforced hose and stainless-steel tube. Select the flange size, connection standard, body grade and metering arrangement for your project.
FROZENFIRE · INLINE INDUCTORS
FIXED & SEMI-FIXED · FLANGED CONFIGURATIONFlanged Inline Inductor
Stainless-steel construction. Flanged foam proportioning.
A heavy-wall SS 304 / SS 316 Venturi foam inductor for fixed and semi-fixed systems. Flanged connections, preset 3% or 6% induction and a complete concentrate pickup assembly support integration with foam monitors, pourers and generators.
SS 304 / SS 3163% or 6% preset3″ / 4″ / 6″ flanges
Talk to Frozenfire +91 7878 717 818- Working pressure
- 7–12bar
- Hydrostatic test pressure
- 21bar · test value
- Flange sizes
- 3″ / 4″ / 6″80 / 100 / 150 NB
- Preset proportion
- 3% / 6%custom metering available
PRODUCT OVERVIEW
Foam proportioning.
Part of your system.
The Frozenfire Flanged Inline Inductor proportions foam concentrate into a pressurised water stream through a stainless-steel Venturi nozzle and diffuser. It is designed for fixed and semi-fixed fire protection systems supplied from an external concentrate drum, tote or tank.
A heavy-wall stainless-steel barrel and flanges are available in SS 304 or SS 316. The assembly has a high-gloss safety-yellow epoxy / PU finish and flanged ends for installation in fire-water headers, foam pump rooms and mobile skid platforms.
The pickup kit includes a stainless-steel isolation ball valve, quick-connect fitting, clear reinforced suction hose and a rigid stainless-steel pickup tube. A non-return check valve controls backflow toward the concentrate supply.
Venturi nozzle & diffuser
A stainless-steel convergent nozzle produces suction; the divergent section mixes concentrate with the water stream.
Preset proportioning
Choose 3% or 6% induction. Custom metering is available for the specified duty.
Complete pickup assembly
An SS isolation ball valve, quick-connect fitting, clear reinforced hose and angled-tip SS pickup tube connect to the external concentrate supply.
Non-return check valve
A built-in brass / stainless-steel check valve is provided to prevent water backflow into the concentrate drum or tank.
Flanged integration
ANSI B16.5 Class 150 / BS 4504 PN16 Table RF connection options support rigid inline installation.
TECHNICAL DATA
Flanged technical specifications
Construction, connections and pressure data from the Flanged Inline Inductor catalogue, revision 07/26.
Download PDF| Parameter | Catalogue information |
|---|---|
| Product type | Flanged inline Venturi foam inductor |
| Body material | SS 304 / SS 316 heavy-wall barrel and flanges |
| Inlet & outlet connections | Flanged ANSI B16.5 Class 150 / BS 4504 PN16 Table RF |
| Available flange sizes | 3″ (80 NB), 4″ (100 NB), 6″ (150 NB) |
| Proportioning ratio | 3% or 6% preset induction; custom metering available |
| Foam pickup assembly | Clear reinforced PVC hose, SS pickup tube, SS ball valve and check valve |
| Working pressure range | 7–12 bar |
| Hydrostatic test pressure | 21 bar |
| External finish | Anti-corrosive high-gloss safety-yellow epoxy / PU coating |
Select the flange standard, size, stainless-steel grade and metering arrangement to match the installation. The 21 bar hydrostatic value is a test pressure; the specified working range is 7–12 bar.
Flow capacity by flange size
Catalogue flow ranges for each size. Select the inductor’s rated duty to match the downstream foam equipment.
| Flange size | Nominal bore | Flow capacity |
|---|---|---|
| 3″ | 80 NB | 600–1200 LPM |
| 4″ | 100 NB | 1200–2200 LPM |
| 6″ | 150 NB | 2200–3500 LPM |
WORKING PRINCIPLE
From flowing water
to proportioned solution.
Venturi induction uses the water supply to draw concentrate into the flowing stream.
Water accelerates
Water enters through the inlet flange and passes through the stainless-steel convergent nozzle, creating a low-pressure suction zone.
Concentrate enters
Atmospheric pressure drives concentrate through the stainless-steel pickup tube, reinforced hose and open isolation valve into the suction chamber.
Solution leaves the diffuser
Concentrate mixes with the water in the divergent diffuser. The foam solution flows to the connected foam monitor, pourer or generator.
OPERATION
Connect. Check.
Flush after use.
Product catalogue guidance to use with the selected equipment and the facility’s operating procedure.
- 01
Check the flanged installation
Check that flange bolts are evenly tightened with the correct gaskets installed. Match the body’s flow-direction arrow to the pipeline flow.
- 02
Prepare the concentrate supply
Insert the stainless-steel pickup tube to the bottom of the concentrate drum, tote or tank. Open the foam isolation ball valve before starting water flow.
- 03
Start and verify induction
Open the main water isolation valve gradually to achieve the required duty within the 7–12 bar working range. Check the clear suction hose for continuous concentrate flow without trapped air.
- 04
Transfer to clean water
After use, close the main water supply and move the pickup tube into a container of clean fresh water.
- 05
Flush the pickup and inductor
Re-pressurise the water line and flush for 2–3 minutes, continuing until clear water is drawn through the pickup hose and discharged.
- 06
Drain and secure
Close the foam ball valve, disconnect the pickup hose, drain residual water and secure the system.
APPLICATIONS
Foam delivery across
industrial environments.
Applications and installation settings described in this product’s catalogue. Select the equipment and concentrate arrangement for the protected hazard.
- 01Petroleum refineries
- 02Chemical tank farms
- 03Loading gantries
- 04Offshore platforms
- 05Foam pump rooms
- 06Mobile skid platforms
INSPECTION & MAINTENANCE
Keep the passage clear.
Check the proportion.
After-use care, monthly inspection and annual maintenance from the product catalogue. Include these in the equipment’s maintenance programme.
01After every use
- Flush the inductor and complete pickup assembly with clean water using the shutdown sequence above.
- Remove residual concentrate to prevent deposits from obstructing the Venturi jet and check valve.
- Drain the pickup hose and secure the system after flushing.
02Monthly inspection
- Inspect the safety-yellow coating for chips or deep gouges; touch up with epoxy primer where necessary.
- Check flange joints and gaskets for water or concentrate leakage.
- Inspect the reinforced PVC pickup hose for kinks, cracks or hardened sections and replace deteriorated hose.
03Annual / preventive overhaul
- Isolate the water supply, release line pressure and drain the pipeline before unbolting the centre body flange.
- Inspect the stainless-steel Venturi orifice for scale, algae or chemical deposits. Clean with a soft nylon tube brush and warm water.
- Inspect the suction check-valve spring, disc movement and seal seating. Replace worn elastomeric seals.
- Reassemble the centre flange with a fresh EPDM / neoprene gasket and tighten the bolts evenly in a star pattern.
TROUBLESHOOTING
Identify the cause.
Restore the flow.
Checks from the Flanged Inline Inductor catalogue. Isolate, depressurise and drain the line before opening the inductor or servicing its check valve.
No concentrate induction
- Possible cause
- Low inlet pressure, a closed / partly closed foam ball valve, or a blocked Venturi or check valve.
- Check & action
- Check inlet pressure against the selected operating duty and ensure the foam isolation valve is fully open. Isolate, depressurise and drain before inspecting or cleaning blocked passages.
Water returns to the foam drum
- Possible cause
- The pickup check valve is held open by debris or dried concentrate.
- Check & action
- After isolating and depressurising the system, inspect the suction check valve, clean the seal face with warm water and retest.
Weak foam solution
- Possible cause
- Air enters through suction connections, or the pickup tube is above the concentrate level.
- Check & action
- Secure the hose clamps and fittings, and keep the pickup tube at the bottom of the concentrate container.
High pressure drop
- Possible cause
- Excessive downstream backpressure, for example from a long hose run or an unsuitable nozzle size.
- Check & action
- Match downstream foam equipment to the inductor’s rated flow and check the connected hose and nozzle arrangement.
DOCUMENTS & SUPPORT
The catalogue.
Your project details.
Download this product’s original PDF or discuss the selected configuration with Frozenfire.
Flanged Inline Inductor
Original product literature
Flange configurations, size-wise flow ranges, pickup assembly, operating instructions, maintenance and troubleshooting.
Download PDF Open catalogueSpecify your configuration
Product and project enquiries
Share flange size and connection standard, required flow and inlet pressure, SS grade, concentrate type, proportion, installation drawing and quantity.
Request technical detailsEXPLORE THE RANGE
More configurations.
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A portable Venturi inductor that draws foam concentrate from an external container into the water stream at a preset proportion. Instantaneous male inlet and female outlet connections support quick integration with compatible foam delivery equipment.
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02 · SELECTABLE FOAM PROPORTIONING
Aluminium Variable Flow Inline Inductor
An aluminium inline foam inductor with selectable 0%, 1%, 3% and 6% foam-proportion settings. Venturi-based operation draws concentrate through the pickup hose for compatible mobile and fixed foam-system arrangements.
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