NiAlBr Nickel Aluminium Bronze Diaphragm Valve Flanged Class 150
Diaphragm Valves

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

Sodium Hypochlorite Seawater HCl 5% Slurries

Available Sizes: 1/2", 3/4", 1", 1-1/2", 2", 3", 4", 6"

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Technical Specifications

Valve Type

Weir Type Diaphragm Valve

Operation

Manual (Handwheel)

End Connection

Flanged (Flat Face)

Pressure Rating

Class 150# (PN20)

Design Temperature

60°C (140°F) Max

Design Standard

BS 5156 / ISO 5765

Materials of Construction (MOC)

Component Material Specification
Body Nickel Aluminium Bronze ASTM B148 C95800 / UNS C95800
Bonnet Nickel Aluminium Bronze ASTM B148 C95800 / UNS C95800
Diaphragm EPDM / PTFE Lined FDA Compliant Grade
Weir Nickel Aluminium Bronze ASTM B148 C95800 (Integral)
Compressor Stainless Steel / NiAlBr SS316 / C95800
Handwheel Cast Iron / Aluminium Epoxy Coated
Spindle Stainless Steel SS316 / SS304
Bolting Stainless Steel ASTM A193 B8M

Note: All wetted parts are suitable for process fluids (Sodium Hypochlorite, Seawater, HCl 5%)

Dimension Table - Class 150# Flanged (ASME B16.5)

Size (inch) DN (mm) L (mm) D (mm) D1 (mm) b (mm) n × d H (mm) Weight (kg)
1/2" 15 130 89 35 11 4 × 16 145 3.5
3/4" 20 140 98 43 13 4 × 16 155 4.2
1" 25 150 108 51 14 4 × 16 170 5.5
1-1/2" 40 180 127 73 16 4 × 16 195 9.0
2" 50 200 152 92 16 4 × 19 220 14
3" 80 250 190 127 19 4 × 19 265 28
4" 100 290 229 157 24 8 × 19 310 48
6" 150 370 279 216 25 8 × 22 385 95

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

BS 5156

Diaphragm Valves

ISO 5765

Diaphragm Valves

ASME B16.5

Flange Dimensions

ASME B16.10

Face-to-Face

ASTM B148

NiAlBr Material

FDA

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

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