Operating Instructions
Disk type non-return valves
RV Solid series
Type: P740, P741, P745, P750 and P760
DN 010 – 150, OD 0.50” – 6.00”, ISO 008 – 125
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Copy of the original operating instructions
BAA RV Solid
en
3.
Intended use
3.1.
scope of application
These operating instructions are only valid for the following valves:
Disk type non-return valves
Type
P740 / P741 / P745 / P750 / P760
Sizes
DN 010 – 150
OD 0.50” – 6.00”
ISO 008 – 125
3.2.
Use, structure and method of working
The disk type non-return valves stop the return flow of fluid media against the desired direction of flow.
These spring-loaded disk type non-return valves are characterized by the fact that a flow path can be closed in one
particular direction by a closing body fitted with an elastomer seal by way of a spring, and opened in the other
direction thanks to the pressure of the flowing liquid.
When in the closed position, the closing body is pressed into the seal seat either by way of spring tension or by
way of the superposition of the spring tension with a parallel compressive force.
If a level pressure that is able to overcome the aforementioned restoring forces builds up in the forward direc-
tion, the closing body is then lifted from the seal seat and the flow is released.
The disk type non-return valves each have a valve seat and a closing body
The valve seats are each axially sealed.
It is preferable to install disk type non-return valves downstream of the pumps in piping systems.
If they are installed there, the valves stop media from being able to flow back into a system area with a lower
pressure level (e.g. in a pre-separation tank) in the event there is a pump fault in a system area with a higher
pressure level (e.g. a pressure tank).
3.3.
Storage
Store the valve in a dry place protected against external influences.
Do not expose to direct sunlight
Prior to handling (disassembly of the valve body), temporarily store the valves in a dry place at an ambient tem-
perature of ≥ 5° C for at least 24 hours.
3.4.
Service Life
The foreseeable service life of disk type non-return valves is 15 years.
3.5.
ATEX Use
The disk type non-return valves comply with the requirements of Directive 2014/34/EU of the European Parliament
and the Council and are suitable for use in potentially explosive atmospheres.
The valves must not be operated outdoors, if its service location there is classified as area with risk of explosion
pursuant to Directive 2014/34/EU of the European Parliament and of the Council.
Usage of the disk type non-return valves ”underground” is not permitted.
