Swing check valve Bronze 5K - F7415 (Union Bonnet Type)

Bronze Lift Check Valve JIS 5K F7415

Lift check globe valve with union bonnet, designed for small-diameter marine auxiliary piping. Although often categorized commercially as swing check, the technical specification defines this product as Bronze 5K Lift Check Globe Valve – Union Bonnet Type.

Standards and Testing

• Design standard: JIS F7415-1996
• Test standard: JIS F7400-1996
• Connection class: JIS 5K
• Body hydrostatic test: 1.05 MPa
• Seat test: 0.77–0.4 MPa

Construction

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

Union bonnet allows internal access for disc, seat, and gasket inspection without full line disassembly, provided adequate maintenance clearance is available.

Operation

Disc lifts vertically by differential flow pressure and reseats when flow decreases or backpressure occurs. Lift check design requires clean media and sufficient flow velocity to prevent disc chatter.

Typical Applications

• shipboard fresh water lines
• auxiliary cooling circuits
• service water lines
• small pump discharge
• installations with JIS 5K flanges

Selection and Maintenance

Selection should verify DN, operating pressure, flow rate, flow direction, and BC6 bronze compatibility with the process media. For systems with suspended solids, salts, or deposits, periodic seat cleaning and disc movement checks are required.

FAQ

How does this differ from a swing check?
Lift check valves have a disc that moves vertically relative to the seat; swing check valves use a hinged flap.

Is an actuator required?
No. Operation is mechanical, driven by flow and reverse pressure.