Valves - tank valves

Retrofit valves


ASEPCO Weirless Radial diaphragm™ Retrofit valve

Designed specifically to meet the stringent requirements of the bioprocessing industry Weirless Radial diaphragm tank valves offer solutions to the most challenging applications. It is easy to weld our valves truly flush to the bottom of your tank with our heavy‑duty, thick weld flange. There are no gaskets, bolts or seams.

Features and benefits

  • Use to add ASEPCO valves to existing tanks
  • Many different designs to fit your specific situation
  • Valve sizes: 0.5", 1.0", 1.5", 2.0", 2.5", 3.0", 4.0"

Technical summary

Mounting typeBolt in 
Surface finish optionsElectropolished, Max 10 micro-inch Ra (0.25 µm Ra), Max 15 micro-inch Ra (0.375 µm Ra), Max 20 micro-inch Ra (0.5 µm Ra) 

Technical Summary table lists features available within the range. See ‘Specifications’ tab for model specific information.


Technical specifications

Retrofit valves
Mounting typeBolt in 
Sizes0.5", 1.0", 1.5", 2.0", 2.5", 3.0", 4.0" 
Surface finish optionsElectropolished, Max 10 micro-inch Ra (0.25 µm Ra), Max 15 micro-inch Ra (0.375 µm Ra), Max 20 micro-inch Ra (0.5 µm Ra) 



  1. ASEPCO weirless radial diaphragm valves (US).pdf
    PDF - 605.5kb



  1. Tank valve manual (EN).pdf
    PDF - 2.4mb



The AKS actuator series** for tank valves is a durable, easy to maintain actuator made of a plastic housing and stainless steel diaphragm interface. The resulting actuator is a hygienic design which is GMP-compliant.

Our tank valve actuators are also available in the AJS actuator series an all stainless steel actuator providing all the same performance, but in a heavy-duty package.

Both versions offer manual and pneumatic options, are provided with laser-etched serial numbers for traceability, and carry a market-leading three year warranty. It is straightforward to add automation to the pneumatic versions by mounting switches or controllers from any manufacturer.

Work with all manufacturers linear switches and controllers (i.e. Westlock, Stonel, Burkert, etc.)

**AKS actuator series only available on 0.5" to 1.5" sizes



Multiple materials cope with virtually every temperature, pressure and chemical challenge in the food and biopharm industries.

Materials include:

  • Silicone
  • EPDM
  • Silicone plus
  • EPDM plus
  • Viton A
  • Viton A (steam resistent)
  • Viton GF
  • PTFE

All diaphragms are laser-etched with cure dates and batch numbers, ensuring that they are completely traceable.

Recommended Products

  1. EPDM diaphragms

    EPDM diaphragms

    EPDM diaphragms. Not suitable for use with solvents or petroleum agents.

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  2. PTFE diaphragms

    PTFE diaphragms

    Long-lasting, quick-change diaphragms. Extremely chemical and steam resistant. Only available for tank valves.

    Valves - diaphragms

  3. Viton diaphragms

    Viton diaphragms

    Excellent heat and chemical resistance. Not suitable for use with ketones and esters. Steam resistant version available.

    Valves - diaphragms

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ASEPCO Weirless Radial diaphragm retrofit valve - the leading aseptic tank‑bottom valve.

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