3
4.
FUNCTION
Ball valves are used to shut off medium flow and designed for two operation positions: entirely open or completely closed. Do not use
ball valves as throttling valves.
5. APPLICATION
- installations of industrial cold and hot water
- steam
- compressed air installations
- glycol
- industrial oils
-
neutral media depending on the materials - they can be either gases or liquids of group 1 and 2 according to Regulation EC No
1272/2008, resulting from the practice of application.
-
industrial technologies, heating, refrigeration, air conditioning.
Working medium requires or prohibits the use of certain materials. The ball valves are designed for normal conditions of use. In the
case that working conditions exceed these requirements, e.g. in the case of aggressive or abrasive factors, a user should make an
inquiry to the manufacturer before ordering.
Working pressure should be adjusted to the maximum temperature of the medium, as shown in the tables below.
Temperature [
⁰
C]
Material
PN
-10 ÷ 120
150
EN-GJL250
10
10 bar
9 bar
16
16 bar
14,4 bar
EN-GJS400-15
16
16 bar
15,5 bar
6.
ASSEMBLY
During the assembly of ball valves following rules should be observed:
-
to evaluate before an assembly if the valves were not damaged during the transport or storage,
-
to make sure that applied valves are suitable for working conditions and medium used in the plant,
-
to take off dust caps if the valves are provided with them,
-
to protect the valves during welding jobs against splinters and used plastics against excessive temperature,
Pipeline where the valves are fitted should be conducted and assembled in such a way that the valve body is not
subjected to bending moment and stretching forces.
Bolted joints on the pipeline must not cause additional stress resulted from excessive tightening, and fastener materials
must comply with working conditions of the plant,
-
during pipeline painting valve stem should be protected,
-
valves can be assembled in any position, however it is recommended to install the valve with hand lever upwards, and
valves with actuator– actuator upwards
It should be take note of medium flow direction, marked with an arrow on the body,
-
before plant startup, especially after repairs carried out, flash out the pipeline through entirely open valve, in order to avoid
solid particles or welding splinters which may be harmful for sealing surfaces,
-
steam pipelines should be lead in a way that prevents the accumulation of water,
