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Flush bottom tank valve (Disc type)

Flush bottom outlet valves

Flush bottom valves (referred to as Tank valve, Angle bottom valve, Bottom drain valve, Flush mount valve etc.) are designed to provide drainage and dead space free shutoff for reactors, vessels, autoclaves and storage tanks. The dead space free shutoff is accomplished by placing the valve seat flush with the bottom of the vessel. This eliminates any buildup of product within the vessel nozzle itself.

Advantage of Disc type is short stroke for open/close operation. Air cylinder operation is usual for saving labor.
Ram (Piston) type valves are suitable for polymer application.


Teflon(R) coating and lining available.
For corrosion resistance, chemical resistance, and adhesion prevention of impurities.
Not only for Polymer, but also Pharmaceutical, food application

Standard Drawing download

Disc type Flush Bottom Valve Characteristic

Left:Rising Disc Type / Right:Lowering Disc Type

2 types of Disc type flush bottom valve.

Left : Rising Disc Type
Right : Lowering Disc Type


  • Flexible design capabilities allow fitting any vessel nozzle configuration
  • Disc rising or lowering
  • Fit exactly to the wall for Disc lowering type
  • Crust breaking for Disc rising type
  • Measurement temperature in vessel available with built-in thermometer
  • Manual, Pneumatic cylinder(spring return or double acting / with or without Manual hand-wheel), Electric, Hydraulic operations
  • Jacketed valve type(Full jacketed, Semi jacketed), Non jacketed (Single) type

Available size

For another size, please ask us.
e-mail : info@bb-aska.co.jp
~300Lb(20K) 600Lb(40K)~
~20"(500A) ~10"(250A)

Variety of Products

Click [3D] to see 3D-FLASH model.
[3D] : 3D Model, Photo : Large image available.

Flush Bottom Valve [3D]
10K-2"x1.5"
Flange type
Flush bottom valve
with Thermometer
[TI type]
Flush Bottom Valve [3D]
10K-2.5"x1.5"
Flange type
Flush Bottom Valve
with Thermometer
Air cylinder operate
[TO type]
Flush Bottom Valve [3D]
10K-2"x1.5"
Flange type
Flush Bottom Valve
with Thermometer
PTFE Seat & Lining
[TI type]
Flush Bottom Valve 300psi-2"x1.5"
Flange type
Flush Bottom Valve
with Thermometer
[TO type]
Flush Bottom Valve [3D]
20K-20"x16"
Large size
Flush Bottom valve
Electric Motor operate
[TI type]
Flush Bottom Valve [3D]
150psi-10"x10"
Flange type
Gear operate
Flush Bottom Valve
[TO type]
Flush Bottom Valve [3D]
10K-4"x3"
Flange type
Gear operate with extended shaft handwheel
Flush bottom valve
[TI type]
Flush Bottom Valve [3D]
20K-1.5"x1"
Flange type
Gear operate with extended shaft handwheel
Flush bottom valve
[TO type]
Flush Bottom Valve [3D]
10K-8"x8"
Flush bottom valve
with door for inspection
Air motor operate
[TI type]
Flush Bottom Valve [3D]
150psi-8"BW x 4"RF
Flush Bottom valve for pipeline
with PAD Flange
Manual operate
[TOMP type]
Flush Bottom Valve [3D]
150psi-5"/3"x3"/2"
Flange type
Jacketed
Flush Bottom Valve
[TO type]
Flush Bottom Valve [3D]
20K-4"x3"
Flange type
Air cylinder operate
Flush Bottom Valve
[TO type]
Flush Bottom Valve 20K-5"/3"x4"/3"
Flange type
Jacketed
Flush Bottom Valve
[TO type]
Flush Bottom Valve PN25-2"x2" Flanged
Diaphragm opeate
Flush bottom Control Valve [TO type]