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General notes
The shut-off valves are high-quality fittings that must be grounded with particular
care. The sealing surfaces on the seal and valve seat are precision machined in order
to achieve the necessary tightness. The ingress of foreign bodies into the shut-off
valve must be avoided during assembly and operation. The shut-off valves must be
stored in the condition in which they are delivered, i.e. free of oil, grease, particles
and dirt, and in a dry place.
The tightness of a shut-off valve can be impaired by hemp, PTFE tape or other seal-
ants, as well as by welding beads, etc. Rough handling of finished shut-off valves
during storage, transport and assembly can damage a shut-off valve and cause it to
leak. The required tools must be cleaned sufficiently before assembly.
The customer must take the following points into consideration when planning and
designing shut-off valves:
• The working pressure that occurs (pressure surges/pulse pressure). The pressures
specified in the data sheet refer to static loads. For dynamic and alternating loads,
appropriate pressure reductions must be observed.
• The selected materials and sealing materials must be suitable for the application.
• The drive length (pos. 4) must be designed in such a way that the spindle seal
cannot freeze.
• Do not use an extension to operate the handwheel.
Transport and storage conditions
• Protect the fitting from external influences, e.g. dirt, moisture, impact, blows or
vibrations. Transport the fitting only in the supplied packaging. Only remove the
plastic bags and protective caps immediately before assembly.
• Store the fitting in a dry and dirt-free location; in damp storage rooms, prevent the
formation of condensation by using desiccants or heating.
• Maintain transport and storage temperatures between -20°C and 65°C.
Assembly and maintenance instructions - 2140 / 2180
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