Specifications

Model 50 Valve, Continued
If customer maintenance personnel are not technically trained to repair
the Model 50 Valve on site, it is recommended that the valve be returned
to Siemens for repair or direct replacement.
Maintenance
Personnel
If it is determined that the problem is directly related to the Model 50
Valve system performance, the customer must make a determination if
the valve can be repaired on site or if it should be returned to Siemens
for repair or replacement.
Direct Valve Replacement
To repair the Model 50 Valve on site, the customer must have the
necessary maintenance tools and replacement parts. Recommended
valve spare parts can be obtained from Siemens.
Repair of Valve
When cleaning the Model 50 Valve and associated components, it is
imperative that the maintenance be performed in a clean and
contaminant free facility. Components should be placed on a lint free
cloth to prevent impurities from contaminating the valve and its
components. Hands should be clean and free of contaminants.
Maintenance Facility
If Model 50 Valve maintenance is to be performed on site, the area must
be clean and free of foreign contaminants. Presence of any foreign
contamination can cause additional valve problems after reinstallation.
All foreign contamination adhering to valve must be removed using
cleaning solvent, such as hexane, acetone, or methanol and a dust/lint
free cloth. After cleaning Model 50 Valve components, shake or blow
with clean air the excess cleaning fluid from the individual components.
Ensure that the components are air dry before reassembling.
Do not allow Model 50 Valve polished surfaces to rest on any surface
other than a lint free cloth. Clean sample flow openings in top plate,
center plate, bottom plate and Valco fitting nuts using a syringe filled with
cleaning solvent such as hexane, acetone, or methanol.
CAUTION
To repair the Model 50 Valve on site the Analytical Module must be
removed from the Modular Oven. Note that for ease of maintenance it
is possible to remove and install an Analytical Module while the
device is powered up. This should not damage the components on the
module.
Removal of Analytical
Module
A5E31405710001 4-21