# ANSUL Medium Expansion Foam Nozzle

- Link: https://fasco.pk/product/ansul-medium-expansion-foam-nozzle/
- Published: 2026-10-28T07:33:53+00:00
- Author: Fasco Pakistan

# ANSUL Medium Expansion Foam Nozzle

The **ANSUL Medium Expansion Foam Nozzle** is a portable firefighting device designed
to produce and discharge medium-expansion foam for suitable fire protection applications.
It uses an air-aspirating design, drawing air into the foam solution as it passes
through the nozzle to create expanded foam.

ANSUL offers two documented medium-expansion handline nozzle models: the KR-M2 and
KR-M4. The KR-M2 has a nominal flow rate of 227 litres per minute, while the KR-
M4 has a nominal flow rate of 454 litres per minute, both at 100 psi (approximately
6.9 bar). The published datasheet lists an expansion ratio of approximately 50:1
for these models.

Medium-expansion foam can produce considerably more foam volume than low-expansion
foam using a given volume of solution. Depending on the fire hazard and system design,
it can help cover spill areas and reach locations such as openings in buildings.
Correct selection depends on the application, compatible foam concentrate, water
supply, and proportioning equipment.

## Key Features

### 1. Air-Aspirating Foam Generation

The nozzle draws air into the foam solution to generate expanded foam. This design
supports medium-expansion foam application when operated within the manufacturer’s
specified pressure and system requirements.

### 2. Two Flow-Rate Options

The ANSUL KR-M2 and KR-M4 models provide different nominal flow capacities:

 * **KR-M2:** 227 L/min (60 US gpm) at 100 psi.
 * **KR-M4:** 454 L/min (120 US gpm) at 100 psi.

The appropriate model should be selected according to the required discharge rate
and the capacity of the firefighting system.

### 3. Stainless-Steel Construction

The published product datasheet specifies a stainless-steel nozzle tube and a tough
polyurethane handle. These materials are intended to provide practical durability
and corrosion protection for firefighting equipment.

### 4. Ball Shut-Off Valve

The documented models include a ball shut-off valve, allowing the operator to control
the discharge during use. Operators should follow the manufacturer’s operating and
maintenance instructions.

### 5. Medium-Expansion Foam Output

The published expansion ratio is approximately 50:1. Actual foam performance can
vary with the operating pressure, foam concentrate, proportioning arrangement, and
other system conditions.

### 6. Compatible Foam Concentrates and Eductors

ANSUL recommends using the appropriate ANSUL Model Z eductor to proportion foam 
concentrate to the nozzle. The product documentation identifies compatible concentrate
families for specific applications. Confirm current compatibility with the manufacturer
before selecting the foam concentrate.

## Technical Specifications

The following specifications are for the documented ANSUL KR-M2 and KR-M4 models.

 * **Product Name:** ANSUL Medium Expansion Foam Nozzle
 * **Manufacturer / Brand:** ANSUL
 * **Product Type:** Portable medium-expansion foam handline nozzle
 * **Available Models:** KR-M2 and KR-M4
 * **KR-M2 Part Number:** 415983
 * **KR-M4 Part Number:** 415984
 * **KR-M2 Flow Rate:** 227 L/min (60 US gpm) at 100 psi
 * **KR-M4 Flow Rate:** 454 L/min (120 US gpm) at 100 psi
 * **Nominal Test Pressure:** 100 psi (approximately 6.9 bar)
 * **Normal Operating Pressure:** 75–100 psi (approximately 5.2–6.9 bar)
 * **Minimum Stated Operating Pressure:** 45 psi (approximately 3.1 bar)
 * **Expansion Ratio:** Approximately 50:1
 * **Nozzle Tube Material:** Stainless steel
 * **Handle Material:** Tough polyurethane
 * **Shut-Off Valve:** Ball valve
 * **Approximate Shipping Weight, KR-M2:** 3.6 kg
 * **Approximate Shipping Weight, KR-M4:** 4.1 kg
 * **Foam Proportioning Equipment:** Matching ANSUL Model Z eductor, selected for
   the relevant model
 * **Inlet Connection:** Confirm the exact supplied configuration
 * **Certifications and Approvals:** Confirm current documentation for the exact
   product and application

## Applications

Subject to the approved fire protection design and compatible foam concentrate, 
medium-expansion foam nozzles may be used for:

 * Suitable flammable liquid spill fires
 * Selected industrial fire protection applications
 * Tire fires and certain waste or landfill fire scenarios
 * Baled cotton, rolled paper, and similar storage hazards where the system design
   specifies medium-expansion foam
 * Applying foam through door, window, or basement openings in suitable emergency
   scenarios
 * Other fire suppression operations for which the equipment is approved

The nozzle is not a universal solution for every fire type. Confirm its suitability
against the specific hazard, foam concentrate, and applicable fire protection standards.

## How to Select the Correct ANSUL Foam Nozzle

### Choose the Required Flow Rate

Select the KR-M2 for the documented 227 L/min configuration or the KR-M4 for the
documented 454 L/min configuration, provided the selected flow matches the system
design and available water supply.

### Verify Operating Pressure

The nominal flow ratings are specified at 100 psi. The datasheet gives a normal 
operating range of 75–100 psi and identifies 45 psi as the minimum pressure for 
acceptable operation. Follow the product-specific operating instructions.

### Match the Eductor

ANSUL recommends the matching Model Z eductor for foam concentrate proportioning.
Confirm that the eductor capacity matches the selected nozzle and that the required
concentrate percentage is supported.

### Confirm Foam Concentrate Compatibility

Use only a foam concentrate approved for the intended hazard and compatible with
the selected equipment. Check the current manufacturer documentation before ordering.

### Verify the Model and Connection

Confirm whether the required product is the KR-M2 or KR-M4 and verify the inlet 
connection, part number, and supplied accessories.

## Why Choose FASCO?

FASCO supplies firefighting and fire safety equipment for professional and industrial
applications. Selecting the correct nozzle and matching proportioning equipment 
helps ensure that the foam system meets its intended operational requirements.

When contacting FASCO, provide your required flow rate, operating pressure, foam
concentrate type, and connection requirements. This information helps confirm the
correct ANSUL model for your application.

## Buy ANSUL Medium Expansion Foam Nozzle from FASCO

Looking for an ANSUL medium-expansion foam nozzle for your fire protection system?
Contact FASCO to enquire about the KR-M2 and KR-M4 models, verify availability, 
and request a quotation.

Confirm the exact model, technical specifications, compatible foam concentrate, 
and matching eductor before placing your order.

**Contact FASCO for product details and pricing.**