Dual Plate Butterfly Check Valve with Hydraulic Buffer System

Buy Dual Plate Butterfly Check Valve with Hydraulic Buffer System units directly from China manufacturer Dafugui to upgrade piping efficiency. Combining a compact wafer footprint with a internal hydraulic damping mechanism, this robust valve manages line vibration across 1.0–2.5 MPa utility networks while cutting installation weight.

Structural Design and Operating Advantages

Compact Wafer-Type Construction

The Dual Plate Butterfly Check Valve with Hydraulic Buffer System body design allows installation between pipeline flanges, reducing overall installation length compared with traditional swing-type check valves.

Benefits include:

Reduced installation space requirements

Lower valve weight for large-diameter pipelines

Easier maintenance in compact equipment layouts

Suitable for pump skid and modular systems

Dual Plate Flow Control Design

The valve uses two independent semi-circular plates connected through a central hinge shaft.

During normal flow:

Fluid pressure pushes the plates open.

The split-disc design provides a balanced flow path.

Lower disc movement helps reduce opening resistance.

During reverse flow:

Springs assist rapid initial closure.

The hydraulic buffer system controls the final seating movement.

Controlled closure helps reduce pressure fluctuations caused by sudden shutoff.

Standards and Design Compliance

Material Selection Guide for Operational Conditions

Dafugui Brand Advantage: Certifications & Quality Assurance

• Triple ISO Accreditation: Dafugui operates under certified ISO 9001 (Quality Management), ISO 14001 (Environmental), and ISO 45001 (Occupational Safety) frameworks to guarantee consistent manufacturing quality.

• Global Market Compliance: Products hold European CE certification for free circulation in EU industrial markets and meet rigorous API standards for international oil and gas fluid control systems.

• 100% Factory Traceability: Every Dual Plate Butterfly Check Valve with Hydraulic Buffer System features hard-stamped heat numbers and material identification codes linked to full EN 10204 3.1 Material Test Reports (MTR).

Quality Inspection Protocols

• Hydrostatic Shell Test: Tested at 1.5x working pressure for structural sound verification.

• High-Pressure Seat Test: Tested at 1.1x rating to confirm bubble-tight sealing.

• Plate Alignment & Spring Tension Inspection: Checked to ensure balanced plate closure without binding.

• Visual & Surface Audits: Verified free from sand holes, porosity, or machining burrs.

Technical Specifications

Frequently Asked Questions

Can this Dual Plate Butterfly Check Valve with Hydraulic Buffer System be installed in vertical piping runs?

Yes, it can be installed in vertical lines with upward flow. The torsional springs assist initial plate closure before flow reversal begins, ensuring prompt, non-slam shutoff.

Why is a dual plate design preferred over a single disc valve in space-constrained skids?

The dual plate configuration splits the flow area in half, drastically reducing disc travel distance and valve weight while allowing a much shorter face-to-face body profile.

How does Dafugui test for seat tightness before dispatching products from the factory?

Every single valve undergoes factory hydrostatic body testing at 1.5 times nominal pressure and bubble-tight seat sealing tests at 1.1 times nominal pressure according to ISO 5208 standards.