Flush Bottom Valves

Flush Bottom Tank Valves

Flush Bottom Valves — also known as Reactor Bottom Valves or Tank Bottom Valves — are mounted directly at the base of reactors, vessels, and storage tanks to ensure 100% discharge of contents with no residual accumulation.

In pharmaceutical manufacturing, chemical processing, and food & beverage production, incomplete discharge isn’t just an operational inefficiency — it’s a contamination risk. Dead legs allow material to accumulate, harbour bacteria, and compromise batch integrity. JossMin’s Flush Bottom Valves are designed specifically to eliminate this risk.

At JossMin, we manufacture Flush Bottom Valves in Ball and E-Seg / C-Seg obturator designs, with Inclined or Straight Bonnet configurations, available up to 400NB — standard or fully custom-engineered to your vessel and process requirements. Our Electro-Pneumatic Flush Bottom Valves, equipped with a Pneumatic Rotary Actuator, Solenoid Valve, Position Indicator, and AFR, provide seamless on-off, modulating, and batching operation. Manual variants with SS Hand Lever are also available.

JossMin's Flush Bottom Valve with Pneumatic RotaryActuator

JossMin's Flush Bottom Tank Valves with Pneumatic Rotary Actuator

JossMin's Manual Flush Bottom Valves with SS Hand Lever

JossMin's Manual Flush Bottom Valves with SS Hand Lever

JossMin's E-Seg Flush Bottom Valves with Pneumatic Rotary Actuator for Reactor Bottoms

Seat & Cavity Filler MoC

PTFE
CFT
GLFT
Metal
Custom to suit application pressure, temperature & fluid compatibility

Construction Type

One Piece
Two Piece

Bore Construction

Standard Port
Full Port
Segmented
Vented

Operation Variations

Manual
On-Off
Modulating
Coarse-Fine / Batching

Valve Construction

Single Piece / Two Piece / Three Piece
Equal / Different Inlet & Outlet Connection Sizes
Full / Reduced Bore
Weldable / Bolted Upstream Flange Design
RTD sensor provision for temperature sensing

Design Variations

Full Ball / E-Seg / C-Seg / Segmented Ball
Soft Seat / Metal Seat
Compact Wafer Type
Jacketed / Purging
Seated / Cavity Filled

Size Range

Custom sizes available. Standard range up to 400NB. Equal and unequal inlet/outlet bore configurations available.

Body & Trim MoC

ASTM A 216 Gr. WCB
ASTM A 351 Gr. CF8
ASTM A 351 Gr. CF3
ASTM A 351 Gr. CF8M
ASTM A 351 Gr. CF3M
Special Alloys as required
Hard-chromed options as required

Variable End Connections / Rating

Flanged + Flanged – ASME 150#, 300#
Tongue + Tongue – ASME 150#, 300#
Groove + Groove – ASME 150#, 300#
Tongue + Groove – ASME 150#, 300#
Flanged + TC – ASME 150#, PN10
Weldable + Flanged – ASME 150#, 300#
Weldable + TC – ASME 150#, PN10

Ball Type Flush Bottom Valve - Manual & Automated

Zero dead leg design — obturator profiles ensure elimination of material entrapment on valve closure, preventing cross-contamination between batches
100% tank and vessel discharge — Flush-mounted at the vessel bottom ensures complete evacuation of contents — no residue, no waste
Ball obturator options — Standard Ball for general process applications; our special C-Seg for slurry, viscous, or fibrous media and our E-Seg for free flowing liquids.
Inclined and Straight Bonnet configurations — Inclined bonnet prevents media fouling at the reactor bottom; Straight bonnet for standard vessel nozzle configurations
Complete electro-pneumatic automation — On-Off, Modulating, and Coarse-Fine/Batching operation with Solenoid Valve, Position Indicator, and AFR supplied as a complete tested assembly
Jacketed and purging variants — For temperature-sensitive or hazardous media requiring thermal regulation or additional containment
RTD sensor provision — Temperature sensing at the valve body available for process monitoring applications
Equal and unequal bore configurations — Inlet and outlet connection sizes can differ to suit vessel nozzle and downstream piping requirements
Full and reduced bore options — To suit flow requirement and downstream pipe sizing
Wide MoC range — WCB, CF8, CF3, CF8M, CF3M, Duplex, Hastelloy, and special alloys as per application
Custom-engineered — Every dimension, connection type, and material selection configurable to your vessel design and process conditions
Manufactured and tested in-house — All valves pressure-tested and QA/QC checked at our 21,000 sq. ft. Vasai facility before dispatch

Every Flush Bottom Valve we supply is configured to your vessel and process specification. Share your requirements and our engineering team will advise on the right obturator design, bonnet configuration, material, and automation setup.