bottom valve

A bottom valve, also known as a bottom outlet valve or a bottom drain valve, is a type of valve installed at the lowest point of a tank, vessel, or other storage container to allow for the drainage or emptying of the contents. It is particularly useful for removing sediments, debris, or other solids that may settle at the bottom of the container, as well as for completely draining the container without having to empty it from the top.


1. Structural Design


The bottom valve has a specialized structure for tank bottom applications. Its flanged connection ensures stable integration with tank outlets. The valve body, crafted from stainless steel (visible in the image), resists corrosion from diverse media. A precision - machined ball core enables tight sealing, preventing residue accumulation at the tank bottom and ensuring thorough medium discharge.


2. Core Function


Primarily used to control medium discharge at the bottom of tanks (like reaction kettles, storage tanks). It allows complete emptying of media, minimizes residue, and supports processes such as material transfer, tank cleaning, and system maintenance in industries like chemical, pharmaceutical, and food production.


3. Technical Specifications
Item Details
Body Material Stainless Steel (e.g., 304, 316)
Nominal Diameter DN25 - DN200 (adapting to tank outlets)
Pressure Rating PN16 - PN40 (suits tank operating pressures)
Temperature Range - 20℃ - 200℃ (covers common industrial media temps)
Seal Standard Complies with leakage - proof norms for tank bottom valves
4. Application Scenarios


Widely applied in chemical reactors, pharmaceutical mixing tanks, and food processing storage tanks. Ideal for scenarios requiring complete medium discharge (e.g., transferring raw materials, cleaning tanks). Its corrosion - resistant material and reliable sealing meet strict hygiene and safety demands in pharmaceutical and food industries.


5. Compliance & Quality


Designed to meet Chinese industrial valve standards (relevant GB/T for tank bottom valves) and general mechanical - equipment quality norms. Undergoes factory tests (pressure, leakage, residue - discharge verification) to ensure no dead - leg design, preventing medium stagnation. Materials have traceability to ensure compliance with industry hygiene and safety requirements (critical for pharma/food uses).


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