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ASEPCO Radial-Diaphragm™ Sterillite™ Valve

ASEPCO Weirless Radial-Diaphragm™
Sterillite™ Valves

Flush-entry satellite valve with all of ASEPCO’s great innovations!

Sterillite ValveFeatures & BenefitsSpecificationsDatasheet & Resources
Asepco Sterillite Valve's full and cutaway images side by side
The ASEPCO Weirless Radial-Diaphragm™ Sterillite™(1) valve is a result of our dedication to our customers needs. We developed this design to eliminate the dead leg associated with steam ports on closed valves. The ASEPCO Sterillite Valve combines a satellite valve that seats on the wall of a larger “host” flush-mounted tank outlet valve. Wherever steam or small volumes of flushing liquids must enter a process system, the Sterillite Valve creates a flush entry without a dead leg.
Valve sizes: 0.75″, 1.0″, 1.5″, 2.0″, 2.5″, and 3.0″


  • 1/2 inch in size, and can be machined into the wall of any “host” valve of 1 inch or greater
  • Flush-mounted to the tank, no dead legs or dead spaces
  • Easy to clean and self-draining by design
  • Sterillite Valve provides steam inlet
  • Sterillite Valve diaphragm seals flush to ID of main valve body
  • Assembles with a clamp, enabling diaphragm change-outs in under a minute
  • Integral travel stops that never need adjusting
  • Enables quick flush or CIP/SIP while the valve is closed, allowing for downstream sterility prior to product introduction, as well as speeding product changeover

ASEPCO Sterillite Valve specs and drawing

Material 316L, AL6XN, Hastelloy, Polypropylene
Machined from solid, hot-rolled, bar stock
Surface Finish Max 20 micro-inch Ra (0.5 um Ra), Electropolished
Max 15 micro-inch Ra (0.375 um Ra), Electropolished
Max 10 micro-inch Ra (0.25 um Ra), Electropolished
Sizes 3/4 inch through 3 inch
Outlet Connections Standard: Sanitary flange or buttweld (others available)
Steam Valve Inlet Connection 1/2 inch sanitary flange standard (others available)
Maximum Pressure (valve body pressure only)
ASME vessels: 250 psi (17 bar)
PED vessels: 175 psi (12 bar)
Maximum Temperature Varies from 135°C/275°F to 260°C/500°F depending on diaphragm material
Marking Each valve is serialized and marked for full material traceability
ISO All products and procedures are governed by our ISO Quality Assurance Program
Standards BPE, CE-PED, ASME
Actuators Autoclavable manual or compact normally closed or normally open pneumatic
Both actuators feature position and leak indicators and are self contained
Diaphragms Silicone, Silicone Plus, EPDM, EPDM Plus, Viton, PTFE

For the complete specifications, refer to the ASEPCO Sterillite™ Valve Datasheet.

For a printable version of this web page that includes the product information, features & benefits, specifications, and drawings, download the PDF.

pdf-download-icon ASEPCO Weirless Radial-Diaphragm™ Sterillite™ Valve Datasheet


We specialize in customization. Please contact our Customer Service Department for any non-standard product requirement (800) 882-3886.

(1) We had a contest in July 2011 to name this combination valve. “Sterillite” was the winner. A big thank you to Brian Uhlenkamp of DCI for submitting the winning entry. We hope he is enjoying his iPad!