NiAlBr Nickel Aluminium Bronze Check Valve Flanged Class 150
Check Valves

NiAlBr Check Valve - Ball Check / Y-Check Flanged Class 150

Nickel Aluminium Bronze (NiAlBr) Check Valve available in Ball Check or Y-Check configurations with Flat Face Flanged connections, Class 150# rating. Designed for preventing backflow in highly corrosive applications including Sodium Hypochlorite, Seawater, and dilute Hydrochloric Acid (HCl 5%).

Process Fluids

Sodium Hypochlorite Seawater HCl 5% Chlorinated Water

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

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Technical Specifications

Valve Type

Ball Check / Y-Check Valve

Operation

Automatic (Flow Actuated)

End Connection

Flanged (Flat Face)

Pressure Rating

Class 150# (PN20)

Design Temperature

60°C (140°F) Max

Design Standard

API 6D / BS 1868

Materials of Construction (MOC)

Component Material Specification
Body Nickel Aluminium Bronze ASTM B148 C95800 / UNS C95800
Cover / Bonnet Nickel Aluminium Bronze ASTM B148 C95800 / UNS C95800
Disc / Ball Nickel Aluminium Bronze ASTM B148 C95800
Hinge Pin Monel 400 / NiAlBr ASTM B164 / B148 C95800
Seat Ring Nickel Aluminium Bronze ASTM B148 C95800 (Integral)
Body Gasket PTFE / Spiral Wound SS316 + PTFE Filler
Bolting Stainless Steel / Monel ASTM A193 B8M / Monel 400

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" 15 114 89 35 11 4 × 16 75 2.8
3/4" 20 127 98 43 13 4 × 16 85 3.5
1" 25 140 108 51 14 4 × 16 95 5.0
1-1/2" 40 178 127 73 16 4 × 16 115 8.5
2" 50 203 152 92 16 4 × 19 135 12
3" 80 241 190 127 19 4 × 19 165 25
4" 100 292 229 157 24 8 × 19 195 42
6" 150 356 279 216 25 8 × 22 250 82

Legend: L = Face-to-Face | D = Flange OD | D1 = Bore Diameter | b = Flange Thickness | n × d = Bolt Holes | H = Overall Height

Features & Benefits

Superior Corrosion Resistance

NiAlBr provides exceptional resistance to seawater, chlorides, and acidic environments, ensuring long service life in marine and chemical applications.

Reliable Backflow Prevention

Precision-machined seating surfaces ensure tight shut-off and reliable prevention of reverse flow in critical piping systems.

Low Pressure Drop

Streamlined flow path design minimizes pressure loss while maintaining effective check valve function.

Complete Traceability

Full material traceability with Mill Test Certificates (MTCs) and compliance documentation as per international standards.

Test Pressure Requirements

Test Type Pressure (Class 150) Standard
Hydrostatic Shell Test 450 PSI (31 bar) API 598
Hydrostatic Seat Test 300 PSI (21 bar) API 598
Pneumatic Low Pressure Test 80 PSI (5.5 bar) API 598

Standards Compliance

API 6D

Pipeline Valves

API 598

Valve Testing

BS 1868

Check Valves

ASME B16.5

Flange Dimensions

ASME B16.34

Valve Design

ASTM B148

NiAlBr Material

Typical Applications

Marine & Offshore

Seawater cooling, ballast systems

Desalination Plants

Pump discharge, brine handling

Chemical Processing

Sodium hypochlorite, chlorine

Water Treatment

Chlorination, dosing systems

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 API 598 and customer specifications
  • All wetted parts are suitable for process fluids
  • Both Ball Check and Y-Check configurations available
  • Special materials, coatings, and certifications available on request

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