Flush Bottom Ball Valve Flush Bottom Valve

A Flush Bottom Valve (FBV) is specially designed to provide complete and efficient drainage from the bottom of tanks, vessels, and reactors. Installed directly at the bottom outlet, this valve ensures zero hold-up, smooth discharge, and easy cleaning, making it ideal for processes where product contamination, residue build-up, or dead zones must be avoided. Flush Bottom Valves are widely used in chemical, pharmaceutical, food processing, and specialty process industries where safe handling and full evacuation of liquids, slurries, and viscous media are critical. The valve design allows the disc to sit flush with the vessel bottom, preventing accumulation of product and enabling quick cleaning between batches.

T-Type Flanged Drawing

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Flush Bottom Valves are engineered to control the discharge of fluids from reactors, tanks, and vessels while ensuring leak-tight sealing and smooth operation. The valve body is designed to mount directly onto the vessel’s bottom nozzle, allowing product to flow out without obstruction.

These valves are available in manual, pneumatic, or motorized actuation, and can be supplied in different materials and seat options depending on the process fluid, temperature, and pressure conditions.

Flush Design: Disc sits flush with the vessel bottom to eliminate dead pockets.
Complete Drainage: Ensures full discharge of liquid, slurry, or viscous media.
Leak Tight Sealing: High performance sealing system for reliable operation.
Corrosion Resistant Construction: Suitable for aggressive chemicals and solvents.
Smooth Operation: Available with handwheel, pneumatic actuator, or gear operation.
Low Maintenance: Robust design with easy servicing and long service life.
High Temperature & Pressure Capability: Suitable for demanding industrial environments.
Compact Installation: Direct mounting on vessel bottom outlet.

Available Options

Actuation Options

Manual (Handwheel / Lever Operated)
Pneumatic Actuator
Electric Actuator
Gear Operated

Body Materials

Stainless Steel (SS304 / SS316 / SS316L)
Carbon Steel
Alloy Steel
Hastelloy (Optional)

Seat & Seal Materials

PTFE
Reinforced PTFE
Graphite
Metal-to-Metal Seat

End Connections

Flanged End
Butt Weld End
Customized Tank Mounting Design

Additional Options

Jacketed Valve Body for heating/cooling
Limit switches for automation
Position indicators
Drain plug provision

Parameter	Specification
Size Range	25 NB to 200 NB
Pressure Rating	Up to PN16 / PN25 (Custom available)
Temperature Range	Up to 250°C (Depending on seat material)
Body Material	SS304 / SS316 / SS316L / CS / Alloy
Seat Material	PTFE / Graphite / Metal Seat
Operation	Manual / Pneumatic / Electric
End Connection	Flanged / Welded
Mounting	Direct Tank Bottom Mounting