Wafer Check Valve Compact Clamped Type for Industrial Pipeline System

Wafer Check Valve is slim wafer-type automatic non-return valve designed for pipeline anti-backflow and medium protection.
Body material: high-quality cast iron / stainless steel optional
End connection: wafer clamped type, installed between two flanges
Pressure rating: PN10-PN16 / Class150
Ultra-thin compact structure, greatly save pipeline installation space
Lightweight design, easy for quick installation and disassembly
Automatic pressure-driven operation, no manual control required
Effective bidirectional anti-backflow function, protect upstream equipment
Low flow resistance, no influence on normal pipeline medium transmission
Precise sealing surface, stable shut-off performance and zero leakage
Impact-resistant rigid body, durable for long-term industrial operation
Wide medium adaptability, stable working performance
OEM support for material, size and specification customization

Description
Shipping & Delivery

Wafer Check Valve

Specification

Product Overview

In modern industrial fluid control systems, check valves are critical, non-return components engineered to prevent reverse medium flow, protect upstream pumps, compressors, and process equipment, and maintain system pressure stability. As global industrial infrastructure expands and process safety standards rise, demand for high-reliability, standard-compliant check valves has grown across oil and gas, petrochemical, power generation, metallurgy, and water treatment sectors. The wafer-type single-plate hard-seal check valve detailed herein is designed and manufactured in strict adherence to API 609, ASME B16.34, ASME B16.10, API 598, and EU CE directives, with a DN100 nominal size, 150LB pressure class, WCB carbon steel body, Cr13 martensitic stainless steel seat, wafer-style connection, and metal-to-metal hard-seal structure. This valve combines precision engineering, robust material selection, and optimized flow dynamics to deliver consistent, long-term performance in medium-pressure, high-temperature, and high-flow industrial environments, making it a trusted solution for critical pipeline applications worldwide.

I. Core Design Standards & Performance Specifications

1.1 Design & Manufacturing Standards

All design, material, dimensional, and testing requirements for this wafer-type single-plate hard-seal check valve are aligned with globally recognized industrial valve standards, ensuring full interchangeability, safety, and compliance for international projects:

API 609: Standard for Lug- and Wafer-Type Butterfly Valves and Check Valves, governing structural design, pressure ratings, and performance requirements for wafer-style check valves.
ASME B16.34: Valves – Flanged, Threaded, and Welding End, defining pressure-temperature ratings, material requirements, and dimensional tolerances for industrial valves.
ASME B16.10: Face-to-Face and End-to-End Dimensions of Valves, standardizing the valve’s axial length for universal compatibility with pipeline flanges.
API 598: Valve Inspection and Testing, mandating 100% shell and seat leakage testing for all production units.
EU CE Directives: Compliance with pressure equipment safety standards for market access in the European Economic Area.

1.2 Dimensional & Pressure Specifications

Nominal Size (DN): DN100 (standard industrial medium-flow size, balancing flow capacity and installation footprint for most process pipelines).
Pressure Class: 150LB (ASME B16.34 Class 150), with a maximum allowable working pressure of 2.07 MPa at ambient temperature, suitable for medium-pressure industrial fluid systems.
Face-to-Face Dimension: Compliant with ASME B16.10, ensuring interchangeability with equivalent valves from global manufacturers.
Connection Type: Wafer-style, designed for installation between two ANSI/ASME or DIN standard pipeline flanges, eliminating the need for integral valve flanges.

1.3 Material Specifications

Valve Body: WCB (ASTM A216 Grade WCB) cast carbon steel, the industry-standard material for industrial valves, offering:
- Tensile strength: 485–655 MPa
- Yield strength: ≥250 MPa
- Operating temperature range: -29°C to 425°C
- Excellent castability, structural rigidity, and compatibility with non-corrosive/weakly corrosive media (water, steam, oil, natural gas).
Valve Seat & Disc: Cr13 (13% chromium martensitic stainless steel), selected for:
- Hardness: HRC 40–45 (after quenching and tempering)
- Superior wear, erosion, and high-temperature resistance
- Thermal expansion coefficient closely matched to WCB, preventing seal gap formation during thermal cycling
- Good corrosion resistance in mild industrial environments.
Internal Components: 304 stainless steel pins and springs, for corrosion resistance and long-term mechanical reliability.

1.4 Sealing & Operational Performance

Sealing Type: Metal-to-metal hard seal, with precision-ground sealing surfaces (Ra ≤ 0.8 μm) to achieve zero leakage per API 598 requirements.
Closing Response Time: ≤0.5 seconds, to minimize reverse flow and water hammer risk.
Leakage Rate: <0.1% of nominal flow rate, meeting API 598 zero-leakage standards for metal-seated check valves.
Operation Mode: Automatic, self-actuated by medium flow and pressure, requiring no external power or manual intervention.
Durability: 100,000+ open-close cycles with <0.1 mm sealing surface wear, ensuring 8+ years of service life under normal operating conditions.