3 Overview
This manual is the primary information source for the installation, operation and
maintenance of ASEPCO Weirless Radial diaphragm tank-bottom (90 degree) valves. The
manual also covers the use of manual and pneumatic actuators. A separate manual is
available for our 180 degree flow path Weirless Radial diaphragm in-line valve range.
3.1 Valve description
All valves assemble using a hygienic clamp to form a seal, surpassing anything available
from weir-style valves. No tools are needed for maintenance.
There are three components to all the valves:
• Valve body: Our valve bodies are a single piece machined out of stainless steel bar
stock with fittings welded on per customer requirements
• Actuator: Manual and pneumatic actuators are available in plastic or stainless steel.
A number of options are available for the actuators, but for any particular valve the
options available depend on the type and size of the valve. See "Specifications" on
page34.
• Diaphragm: Our radial diaphragms have two primary sealing surfaces: a shutoff seal
at the inlet (seat) and a seal at the shoulder between the inside and outside of the
valve. For most valves, a number of different diaphragm materials are available. See
"Parts list" on page37 for a list of available diaphragm materials.
m-radialdiaphragmvalve-en-02 7
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