NiAlBr Ball Valve, NRV & Brass Y-Strainer: Complete Technical Guide for Fire Protection & Marine Systems
January 12, 2026 | 8 min read
Fire protection and marine piping systems demand valves and accessories that can withstand harsh environments, corrosive seawater, and provide reliable performance when it matters most. This technical guide covers three essential components: Nickel Aluminium Bronze (NiAlBr) Ball Valves, Stainless Steel Non-Return Valves (NRV), and Brass Y-Type Strainers.
1. NiAlBr Ball Valve (Screwed End – Full Port)
Nickel Aluminium Bronze ball valves are the gold standard for marine and fire protection applications. The ASTM B148 C95800 material offers exceptional corrosion resistance in seawater environments, making these valves ideal for offshore platforms, shipboard systems, and coastal fire protection installations.
General Specifications
| Valve Type | Ball Valve |
| Construction | Two Piece Ball Valve |
| Port | Full Port |
| End Connection | Screwed End – BSP Female |
| Thread Standard | BSP (ISO 228-1) |
| Design Standard | BS 5351 |
| Testing & Inspection | API 598 |
| Fire Test Standard | API 607 Fire-safe design |
| Pressure Class | Class 150 |
| Operation | Lever Operated |
| Stem Design | Blow-out Proof |
Testing Pressure (Class 150)
| Class | Hydro Test – Body (kg/cm²) | Hydro Test – Seat (kg/cm²) | Air Test – Seat (kg/cm²) |
|---|---|---|---|
| 150# | 32 | 22 | 7 |
Dimension Table – Class 150 (Screwed End)
| Size (NB) | A (mm) | ØC (mm) | L (mm) | Thread (BSP) |
|---|---|---|---|---|
| 15 | 63 | 13 | 155 | 1/2" |
| 25 | 82.7 | 25 | 160 | 1" |
| 50 | 122 | 50 | 178 | 2" |
Bill of Material
| Part No. | Part Name | Material |
|---|---|---|
| 01 | Body (Centre Piece) | Nickel Aluminium Bronze – ASTM B148 C95800 |
| 02 | Connector / End Piece | Nickel Aluminium Bronze – ASTM B148 C95800 |
| 03 | Ball | Nickel Aluminium Bronze – ASTM B148 C95800 |
| 04 | Stem | Stainless Steel AISI 316 |
| 05 | Gland Nut | Stainless Steel AISI 316 |
| 06 | Gland Bush | Stainless Steel AISI 316 |
| 07 | Lock Nut | Stainless Steel AISI 316 |
| 08 | Seat Ring | PTFE |
| 09 | Stem Seal | PTFE |
| 10 | Body Seal | PTFE |
| 11 | Wrench (Lever) | Carbon Steel |
| 12 | Stop | Stainless Steel AISI 316 |
| 13 | Stopper Pin | Stainless Steel AISI 316 |
| 14 | Stud & Nut | Carbon Steel |
Key Features
- Valves manufactured from certified NAB raw material
- Suitable for fire protection and marine environments
- Material Test Certificate (MTC) available
- In-house inspection prior to dispatch
- TPI Inspection available at actuals
2. NRV – Non-Return Valve (Horizontal & Vertical Type)
Non-Return Valves (NRV), also known as check valves, are critical components in fire protection systems. They prevent backflow and ensure unidirectional flow in fire lines, protecting pumps and maintaining system pressure.
NRV Vertical Type
Designed for vertical pipeline installations where flow direction is upward.
NRV Horizontal Type
Designed for horizontal pipeline installations with gravity-assisted sealing.
NRV Specifications
| Design | Lift Type |
| Body & Internals | SS 304 (ASTM A351 CF8) |
| End Connection | 1/2" BSP (F) × 1/2" BSP (F) |
| Application | Non-return protection in fire lines |
3. Brass Y-Type Strainer
Y-Type strainers are essential for protecting downstream equipment from debris and particulates. The 45° screen angle provides efficient filtration while minimizing pressure drop, making them ideal for fire protection, water, and industrial piping systems.
General Specifications
| Type | Brass Y-Type Strainer |
| Flow Direction | Inline |
| Screen Angle | 45° |
| Screen Type | Removable SS Perforated Screen |
| End Connection | BSP Female Threads (ISO 228-1) |
| Pressure Rating | 20 Bar |
| Temperature Range | –10°C to 100°C |
| Application | Fire protection / water / industrial piping |
Bill of Material
| S. No. | Description | Material | Technical Standard |
|---|---|---|---|
| 1 | End Adaptor | Brass | CW617N as per EN 12165 |
| 2 | Body | Brass | CW617N as per EN 12165 |
| 3 | Ring / Seal | NBR | Nitrile Rubber, Oil & Water Resistant |
| 4 | Strainer | Stainless Steel 304 | ASTM A351 CF8 |
Dimension Table
| Size (Inch) | DN | A (mm) | G (BSP Thread) | L (mm) |
|---|---|---|---|---|
| 1/2" | 15 | 10.0 | 1/2" | 52.0 |
| 3/4" | 20 | 13.0 | 3/4" | 65.0 |
| 1" | 25 | 14.0 | 1" | 75.0 |
| 1-1/4" | 32 | 18.0 | 1-1/4" | 89.5 |
| 1-1/2" | 40 | 20.0 | 1-1/2" | 103.5 |
| 2" | 50 | 23.0 | 2" | 125.0 |
4. Testing, Quality & Compliance
Standards Compliance
Manufacturing & testing as per relevant international standards
Material Test Certificate
MTC available on request for all products
Inspection
In-house inspection prior to dispatch
Packing
Industrial export-worthy packing
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