Swing check valve Bronze 16K - F7417 (Union Bonnet Type)

Bronze Lift Check Valve JIS 16K F7417

Lift check globe valve with union bonnet, designed for small-diameter marine pipelines where reverse flow prevention is required in JIS 16K class systems. Operation is automatic, actuated by differential line pressure; no external actuator is required. Suitable for clean media to ensure reliable seating and minimize wear.

Standards and Testing

• Design standard: JIS F7417-1996
• Test standard: JIS F7400-1996
• Flange class: JIS 16K
• Body hydrostatic test: 3.3 MPa
• Seat test: 2.42–0.4 MPa

Materials of Construction

• Body: BC6 bronze
• Bonnet: BC6 bronze
• Disc: BC6 bronze
• Bonnet gasket: non-asbestos
• Bonnet type: union bonnet
• Sizes: DN15 to DN40

Specification note: The technical text may reference “Bronze 5K Lift Check Globe Valve”, but the product title and test pressures correspond to 16K. Confirm final flange and test class during procurement or technical submission.

Operational Characteristics

Disc lifts under forward flow and reseats when flow decreases or backpressure occurs. Lift check design requires sufficient differential pressure and clean media to avoid disc chatter, noise, and seat wear. Not suitable for media with solids or high viscosity.

Typical Applications

• Fresh water and service water lines
• Auxiliary shipboard circuits
• Small pump discharge lines
• Networks with JIS 16K flanges
• Installations requiring internal access via union bonnet

Maintenance

The union bonnet allows access to disc and bonnet gasket. Periodic inspection should include seat cleaning, disc free movement check, and leak testing under reverse pressure.