NiAlBr Diaphragm Valve - Flanged Class 150
Nickel Aluminium Bronze (NiAlBr) Diaphragm Valve with Flat Face Flanged connections, Class 150# rating. Features zero-leakage design ideal for highly corrosive and abrasive applications including Sodium Hypochlorite, Seawater, and dilute Hydrochloric Acid (HCl 5%). The flexible diaphragm isolates the process fluid from the valve mechanism.
Process Fluids
Available Sizes: 1/2", 3/4", 1", 1-1/2", 2", 3", 4", 6"
Materials of Construction (MOC)
| Component | Material Specification |
|---|---|
| Body & Bonnet | Nickel Aluminum Bronze (ASTM B148 C95800) |
| Stem / Spindle | Monel 400 / K500 |
| Seat / Trim | NAB / PTFE / Viton |
Technical Specifications
| Parameter | Specification / Standard |
|---|---|
| Manufacturing / Design Standard | API 609 / API 600 / ASME B16.34 |
| Testing Standard | API 598 / EN 12266-1 |
| Pressure Rating | Class 150 / Class 300 / PN16 |
Dimension Table - Class 150# Flanged (ASME B16.5)
Legend: L = Face-to-Face | D = Flange OD | D1 = Bore Diameter | b = Flange Thickness | n × d = Bolt Holes | H = Overall Height
Features & Benefits
Zero Leakage Design
Flexible diaphragm provides bubble-tight shut-off with zero external leakage, ideal for hazardous and corrosive fluids.
Process Isolation
Diaphragm completely isolates the process fluid from the valve mechanism, preventing contamination and corrosion of operating parts.
Handles Slurries
Streamlined flow path with no pockets or crevices makes it ideal for slurries, viscous fluids, and fluids with suspended solids.
Easy Maintenance
Diaphragm can be replaced without removing the valve from the pipeline. Simple construction with minimal parts.
Test Pressure Requirements
| Test Type | Pressure (Class 150) | Standard |
|---|---|---|
| Hydrostatic Shell Test | 450 PSI (31 bar) | BS 5156 |
| Hydrostatic Seat Test | 300 PSI (21 bar) | BS 5156 |
| Pneumatic Low Pressure Test | 80 PSI (5.5 bar) | BS 5156 |
Standards Compliance
Diaphragm Valves
Diaphragm Valves
Flange Dimensions
Face-to-Face
NiAlBr Material
Diaphragm Material
Typical Applications
Chemical Processing
Sodium hypochlorite, acids, alkalis
Water Treatment
Chlorination, dosing, filtration
Marine & Offshore
Seawater systems, ballast
Desalination
Brine handling, chemical dosing
Technical Notes
- All dimensions are in millimeters unless otherwise specified
- Tolerance: ±3mm for standard dimensions
- Complete material traceability provided with Mill Test Certificates (MTCs)
- Valves tested as per BS 5156 and customer specifications
- All wetted parts are suitable for process fluids
- Diaphragm materials: EPDM, PTFE-lined, Butyl, Neoprene available
- Pneumatic and electric actuators available on request