Tank Bottom Valves - Sanitary Diaphragm & Discharge Valves

Tank bottom valve

What is a Tank Bottom Valve?

A tank bottom valve is a specialized sanitary valve designed for installation at the lowest point of process vessels, tanks, and reactors. Its primary function is to provide complete drainage of the vessel contents while maintaining hygienic integrity and preventing dead spaces where product residue can accumulate.

Unlike conventional side-mounted valves, tank bottom valves are engineered with a profiled body that matches the internal curvature of the vessel bottom, ensuring no product remains trapped after discharge. This design is critical in pharmaceutical, biotechnology, food, and cosmetic industries where complete emptying and CIP/SIP (Clean-in-Place/Steam-in-Place) capability are essential.

Key Design Features

Zero Dead Space

Contoured body matches vessel bottom
No product retention after drainage
Optimal for CIP/SIP operations

Multiple Actuation Options

Manual handwheel for simple operation
Pneumatic actuator for automation
Remote control compatible

Versatile Connections

Weld-in for permanent installation
Tri-clamp for removable setups
Flange for large vessel applications

Technical Specifications

Parameter	Range / Standard
Size Range	DN15 - DN150 (1/2" - 6")
Body Material	Stainless Steel 304 (1.4301), 316L (1.4404)
Surface Finish	Ra ≤ 0.8μm inner surface; mirror polish
Pressure Rating	PN10 / PN16 (10 bar / 16 bar)
Temperature Range	-20°C to +135°C (EPDM); -20°C to +200°C (PTFE)
Seal Materials	EPDM, Silicone, PTFE, Viton (FDA compliant)
Connection Types	Weld, Clamp, Flange, Thread
Actuation	Manual, Pneumatic, Electric
Certifications	FDA, 3A, EHEDG, CE, ISO 9001

Industry Applications

Pharmaceutical Manufacturing: API reactors, formulation tanks, WFI storage — Zero dead space, full drain, SIP capable
Biotechnology: Fermentation vessels, cell culture tanks, downstream processing — CIP/SIP validated designs
Food Processing: Sauce kettles, syrup tanks, mixing vessels — Complete drainage for product changeover
Dairy Industry: Milk silos, yogurt tanks, cheese vats — Hygienic design with EPDM or silicone seals
Beverage Production: Juice tanks, concentrate storage, blending vessels — FDA compliant materials
Cosmetics: Cream mixing tanks, lotion vessels — Corrosion resistant 316L construction

FDA Compliant 3A Certified EHEDG CE Marked ISO 9001

Need a Tank Bottom Valve Solution?

Our sanitary valve engineers can recommend the optimal tank bottom valve configuration for your vessel application. Custom designs and material options available.

Email: info@chlgvalve.com Call: +86-15601794339

Tank bottom valve

What is a Tank Bottom Valve?

the diaphragm valve