GF NeoFlow DN200, Руководство по эксплуатации

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3.3 INITIAL PRESSURISING
CAUTION
Danger of material damage in the pipeline system.
When putting into operation via the main pipeline there is the danger that the initial pressure is too high
and the pipeline system is damaged.
► Putting into operation with an outlet hydrant (H) is recommended.
► To protect the NeoFlow pressure reducing valve (N) from mechanical strain, all components of the
pipeline system must be securely fastened to the ground or another solid object before putting the system
into operation.
a. Ensure inlet and outlet isolation valves (A and O) and hydrant (H) are closed.
b. Open BV1 & BV2 (control-loop ball valves) and CS (control space isolation valve) before
pressurisation.
c. Fully open the adjusting screw on the pilot valve (AS) counterclockwise until the pilot spring is
released (P2=0 bar). Note: if the pilot spring is fully released, the adjusting Bolt on the pilot
valve (AS) can be turned manually without resistance.
- Slowly increase the spring tension of the pilot spring by turning the adjusting screw on the
pilot valve (AS) clockwise (starting point: spring fully released, P2=0 bar). Set the desired
outlet pressure P2 according to the following table. Example: black spring: desired outlet
pressure 4 bar ≈10 revolutions.