Wafer Check Valve Manufacturer - KFTE

Types of Wafer Check Valve

Wafer check valves are compact, flange-mounted valves designed to prevent backflow in pipelines. They come in various types based on design, mechanism, and application.

1. Dual-Plate/Double-Door Wafer Check Valve

• Design: Features two hinged semi-circular discs that fold open with flow and snap shut when flow stops.

• Advantages: Lightweight, space-saving, and quick closure reduces water hammer risk.

• Applications: Common in water supply, HVAC, and low-to-medium pressure systems.

2. Spring-Loaded Wafer Check Valve

• Design: Uses a spring-assisted disc (single or dual) to ensure rapid closure, even with fluctuating flow.

Subtypes:

• Silent/Non-Slam: Prevents slamming noise by closing before flow reversal.

• High-Pressure: Reinforced design for systems with high pressure or rapid pressure changes.

• Applications: Ideal for vertical pipelines, steam systems, and industries requiring quiet operation.

3. Nozzle Wafer Check Valve

• Design: Streamlined body with a nozzle-shaped inlet to minimize turbulence and pressure drop.

• Advantages: Efficient flow with reduced resistance.

• Applications: Used in chemical processing, power plants, and high-flow systems.

4. Conduit Wafer Check Valve

• Design: Complies with UL standards for fire protection systems. Often includes a rubber seat for tight sealing.

• Applications: Fire sprinkler systems and other safety-critical fluid control.

5. Single-Disc Wafer Check Valve

• Design: A single disc pivots on a hinge or central pin, closing with gravity or backflow.

• Advantages: Simple design, cost-effective.

• Applications: Low-pressure water and wastewater systems.

6. Lift Wafer Check Valve

• Design: A piston-like disc lifts vertically with flow and seats tightly when flow stops. Less common in wafer form.

• Applications: Suitable for high-pressure oil/gas or steam systems where tight sealing is critical.

7. Wafer Tilting Disc Check Valve

• Tilting Disc Structure: The valve features a disc that tilts on a hinge or pivot point, opening with forward flow and closing under gravity or spring assistance when flow reverses.

• Compact Wafer Design: Unlike traditional swing check valves, it is lightweight and designed to fit between flanges without requiring additional bolts or space.

• Spring-Assisted Closure: Some models include springs to ensure rapid, non-slam closure, reducing water hammer risk.

Advantages of Wafer Check Valves

Wafer check valves are widely favored in fluid control systems due to their unique design and functional benefits.

1. Compact and Lightweight Design

• Space-Saving: Their slim profile fits tightly between flanges, ideal for systems with limited space (e.g., HVAC, tight pipe runs).

• Reduced Weight: Less material use lowers shipping/installation costs compared to bulky swing or lift check valves.

2. Cost-Effective

• Lower Material Costs: Simplified construction requires fewer components.

• Easy Installation: No need for extra bolts or supports—simply clamp between existing flanges.

3. Quick Closure Mechanism

• Prevents Water Hammer: Rapid disc closure (gravity- or spring-assisted) minimizes pressure surges and pipe damage.

• Non-Slam Options: Spring-loaded designs ensure silent, gradual shutoff in vertical or variable-flow systems.

4. Versatility

• Broad Applications: Suitable for water, steam, oil, gas, and corrosive fluids.

• Material Flexibility: Available in stainless steel, cast iron, PVC, and alloys for diverse environments (e.g., chemical plants, marine systems).

5. Low Maintenance

• Fewer Moving Parts: Hinged disc or dual-plate designs reduce wear and failure points.

• Durable Sealing: Resilient seats (elastomer or metal) ensure long-term leak prevention.

6. Minimal Pressure Drop

• Efficient Flow: Streamlined internal design (e.g., dual plates, tilting disc) reduces flow resistance, saving energy in high-flow systems.