B148 C95800 2507 Dual Disc Wafer Check Valve
B148 C95800 2507 Dual Disc Wafer Check Valve - Image 2
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B148 C95800 2507 Dual Disc Wafer Check Valve

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Description

TECHNICAL DATA SHEET

DUAL PLATE WAFER CHECK VALVE | PN16 | SOFT SEAT DESIGN

PARAMETER SPECIFICATION NOTES
Valve Type Dual Plate Check Valve Standard design
Design Standard API 594 / ASME B16.34 Wafer type per Annex A
Size Range DN 50 to DN 1200 (2″ to 48″) Full bore (100% port)
Pressure Rating PN16 (16 bar @ 120°C)
End Connection Wafer suit for RF Flanges per EN 1092-1 Face-to-face: EN 558-20
Body Material ASTM B148 C95800 (Ni-Al Bronze) UNS C95800
Disc Material ASTM B148 C95800 (No hardfacing) As-cast surface finish Ra ≤ 3.2 μm
Shaft Material Monel K500 (UNS N05500) Solution-treated & aged
Seat Material Full Fluororubber (FKM) Viton® FKM-75, bonded to disc
Spring Material Monel K500
Hinge Bushings Self-lubricating bronze Maintenance-free
Temperature Range Standard: -20°C to +150°C Seat limit: -29°C to +200°C (short term)
Flow Direction Horizontal / Vertical upflow
Hydrostatic Test Press 24 bar (1.5 × PN16) per EN 12266-1
Seat Leakage Class API 598 Class VI (Soft seat) Bubble-tight shutoff
Cracking Pressure ≤ 0.1 bar
Flow Coefficient (Kvs) 2800 (for DN150 valve) Higher vs. metal-seat designs
Max Flow Velocity 8 m/s
Seal Configuration Elastomer-to-Body Direct Sealing No metal-to-metal contact
Certifications • PED 2014/68/EU Cat. II
• WRAS		 Material Certs: EN 10204 3.1

KEY UPDATES & FEATURES

  1. Sealing System

    • Pure FKM (Viton®) seats bonded directly to C95800 discs

    • Zero metal sealing components – eliminates galling risk

    • Leakage rate: ≤ 0.01 ml/min per inch seat dia. (Class VI)

  2. Simplified Disc Design

    • No Stellite hardfacing – cost-optimized for non-abrasive services

    • Disc surface: Machined to Ra 3.2 μm for optimal rubber adhesion

  3. Standard Hinge Mechanism

    • No torsion springs (non-slam feature removed)

    • Gravity-assisted closing (vertical installation required for optimal performance)

PERFORMANCE DATA

Characteristic Value
Cycle Life (Water) >50,000 cycles
Max Backpressure Resistance 25 bar (PN16 × 1.56)
Chemical Compatibility Water, oils, H₂S ≤2000 ppm, weak acids (pH>4)
Installation Angle Limit Vertical: 0°±10°
Horizontal: ±3° level

MATERIAL SPECIFICS

Fluororubber Seats (Viton® FKM-75):

  • Hardness: 75 Shore A

  • Compression Set: ≤15% (70h @ 200°C per ASTM D395)

  • Fluid Resistance: Swell ≤10% in ASTM Oil #3 @ 150°C

Disc (C95800 without hardfacing):

  • Max Surface Pressure: 50 MPa (with FKM seat)

  • Surface Finish: CNC-machined to Ra ≤3.2 μm

COMPLIANCE & APPLICATIONS

Standards:

  • API 594 (Dimensional/Testing)

  • ISO 5208 (Leakage Testing)

  • WRAS (Water Supply Regulations)

Typical Services:

  • Cooling water systems

  • Hydraulic oil return lines

  • Low-abrasion chemical transfer (e.g., glycol, solvents)

  • Potable water distribution

OPTIONAL FEATURES

▢ EPDM Seats (for ozone/steam resistance)
▢ Disc Protection Coatings (e.g., Xylan® for sticky media)
▢ Position Indicator
▢ PTFE Hinge Bushings (extended chemical resistance)

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