Reduces surface contact and hold up
volume of the medium
Compact assembly
Reduces number of welds
Provides a ready-made assembly for field
installation
Welded valve configurations are
designed to improve the process in aseptic
production facilities by reducing the dead legs in
accordance to cGMP. Welded valve configurations may
be as simple as a valve by tube fabrication or as
complex as multiple valve bodies of different sizes
welded into a valve cluster. All welded end
connections are available.
The applications are endless and the challenge is to
efficiently meet the process needs. Strict quality
control is followed for every welded valve
configuration produced by SED. All weld seams that
are accessible are polished according to the
interior surface specification.
The completed welded valve configuration is visually
inspected and 100% are pressure tested. During
installation of welded valve configurations it is
important to follow good piping practice to
guarantee the valve assemblies drainability.
D-Rule
The D-Rule is the dead leg as a relationship between
the B and D dimension as described in ASME BPE. This
definition is a helpful guideline to describe the
maximum allowable dead leg of combined components
which are installed into aseptic process systems or
process skids. The dead leg is described with the B
dimension in mm as absolute value or as a
relationship of B/D.
Depending on the nominal diameters of the
combinations and / or the positioning of the valve
body, the relation can shift between 2:1 and 5:1. If
the D-Rule is specified and the requirements can not
be met with a welded valve configuration, the
solution is manufacturing of the valve body as a
multiport valve which is made from solid block
material.
SA / SAP
SA or SAP
The Sterile Access Fabrication is utilized
in a horizontal piping system where the main
valve is orientated at the self-draining
angle and the access port is at the lowest
drainable point of the waterway.
SL or GMP
SL or GMP
The SL Fabrication is utilized in a vertical
piping system to eliminate dead legs in
point of use applications of high purity
water systems or any other distribution
systems.
