Monel Check Valves

Falcon High-Performance Monel (M35-1 / Alloy 400) Check Valves

At Falcon, we design and manufacture industrial-grade Monel Check Valves engineered to prevent backflow and reverse fluid flow in severe, highly corrosive environments. Cast in high-purity ASTM A494 Grade M35-1 (Cast Monel 400) and trimmed with Monel K-500, our check valves offer automatic, rapid-closing isolation to protect pumps, compressors, and sensitive process equipment from severe pressure surges and water hammer.

Key Features & Advantages

• Superior Corrosion Immunity: Exceptional resistance to hydrofluoric acid (HF), high-velocity seawater, chloride stress-corrosion cracking, and strong alkaline solutions.

• Rapid Non-Slam Closure: Designed with optimized internal geometry and precision-balanced discs to minimize pressure drop and prevent damaging hydraulic shock (water hammer).

• Zero-Leakage Seating: Precision-lapped Monel-to-Monel seating surfaces deliver tight shut-off conforming to API 598 and ISO 5208 Rate A.

• Anti-Galling Hinge Pins: Monel K-500 hinge pins and internal hardware ensure smooth disc pivoting without binding or galling over long operational cycles.

• Low-Maintenance Construction: Bolted cover and pressure-seal bonnet configurations allow easy inline inspection and disc/seat maintenance without removing the valve body from the pipeline.

Technical Specifications & Manufacturing Range

Check Valve Types Offered

• Swing Check Valves:

  • Features a top-hinged disc that swings fully open under forward pressure. Offers full-bore flow capability with minimal resistance, ideal for horizontal and vertical-up pipelines.

• Piston / Lift Check Valves:

  • Uses line pressure to lift a guided piston disc off the seat. Superior for high-pressure, high-velocity gas and liquid lines requiring fast closure.

• Dual-Plate (Wafer) Check Valves:

  • Compact, lightweight wafer design with twin spring-loaded plates. Provides fast, non-slam closure with minimal space and structural support requirements.

• Tilting Disc Check Valves:

  • Designed with a pivoted disc that closes before reverse flow velocity reaches zero, dramatically reducing fluid hammer in high-flow marine and pump discharge applications.

• Ball Check Valves:

  • Uses a Monel ball guide system for compact, small-bore (1/2" to 2") high-pressure instrument and chemical feed lines.

Seating & Leakage Performance

• Monel-to-Monel Metal Seats (Standard): Precision-ground and lapped M35-1 / Monel K-500 seating rated to API 598 and ANSI/FCI 70-2 Class IV / V.

• Resilient Soft-Seated Inserts (Optional): PTFE, RTFE, or Devlon inserts embedded in the disc for ISO 5208 Rate A / FCI 70-2 Class VI (Zero-Leakage / Bubble-Tight) performance.

Contact Falcon for Your Valve Requirements

Whether you need standard Monel check valves or custom-engineered non-slam backflow preventers for severe process environments, our technical experts are here to assist you. Contact Falcon today with your project specifications, pressure ratings, and dimensional requirements.Our engineering team will promptly review your RFQ and provide a competitive quote along with full technical support to ensure optimal valve selection for your critical applications.