Flush Bottom Valves — also called Reactor Bottom Valves or Tank Bottom Valves — mount directly at the base of reactors, vessels, and storage tanks. Their singular purpose: to ensure that every batch is fully discharged, cleanly, every time.
In pharmaceutical manufacturing, chemical processing, and food & beverage production, incomplete discharge is not an inconvenience — it is a contamination event. Dead legs accumulate material, harbour bacteria, and compromise the integrity of what comes next. JossMin Flush Bottom Valves are built to eliminate that risk by design.
JossMin manufactures Flush Bottom Valves across three obturator designs — Ball, E-Seg, and C-Seg — in Inclined or Straight Bonnet configurations, available up to 400NB.
Each valve is engineered and manufactured in-house at our Vasai facility, pressure-tested, and QA/QC verified before dispatch. No intermediaries. No surprises on-site.
Our Electro-Pneumatic Flush Bottom Valves are supplied as complete, tested assemblies — Pneumatic Rotary Actuator, Solenoid Valve, Position Indicator, and AFR integrated and ready to commission. Manual variants with SS Hand Lever are available where automation is not required.
 Not every process is alike. JossMin Flush Bottom Valves are available in three distinct obturator designs, each developed and manufactured by us for specific process conditions.
The standard for general process applications. Proven, reliable, and available across the full range of materials, bore configurations, and automation options.
Available in segmented design to ensure zero entrapment
JossMin’s E-Seg is the specification of choice for free-flowing liquid discharge applications — where clean, unobstructed, and complete evacuation of the vessel is the requirement.
The E-Seg is a JossMin design. Available exclusively from JossMin.
JossMin’s C-Seg is engineered for demanding media — viscous, fibrous, or slurry-laden — where conventional valve designs are prone to clogging, fouling, or incomplete shutoff.
The C-Seg is a JossMin design. Available exclusively from JossMin.
Obturator profiles engineered to prevent material entrapment on closure, protecting batch integrity and eliminating cross-contamination risk
Flush-mounted at the vessel bottom to ensure complete evacuation of contents — no residue, no waste, no rework
Inclined bonnet prevents media fouling at the reactor bottom; Straight bonnet for standard vessel nozzle configurations
On-Off, Modulating, and Coarse-Fine / Batching operation, supplied as a complete tested assembly
For temperature-sensitive or hazardous media requiring thermal regulation or additional containment
Temperature sensing at the valve body for process monitoring applications
Inlet and outlet connection sizes configurable to vessel nozzle and downstream piping
To suit flow requirement and downstream pipe sizing
WCB, CF8, CF3, CF8M, CF3M, Duplex, Hastelloy, and special alloys per application
Every valve pressure-tested and inspected at our 21,000 sq. ft. Vasai facility before dispatch
Construction Type One Piece / Two Piece / Three Piece
Bore Standard Port | Full Port | Segmented | Vented
Bonnet Inclined | Straight
Operation Manual | On-Off | Modulating | Coarse-Fine / Batching
Obturator Designs Ball | E-Seg | C-Seg
Seat & Cavity Filler MoCÂ PTFE | CFT | GLFT | Metal | Custom to application pressure, temperature & fluid compatibility
Seat Type Soft Seat | Metal Seat
Actuation Manual | Pneumatic | Electrical | Manual Override
Special Variants Jacketed | Purging | Cavity Filled | Compact Wafer Type | RTD Provision
Size Range Standard range up to 400NB. Equal and unequal inlet/outlet bore configurations available. Custom sizes on request.
Every JossMin Flush Bottom Valve is configured to your vessel geometry, media, and process conditions. Share your requirements — our engineering team will advise on the right obturator design, bonnet configuration, material, and automation setup.
