Other Applicable Documents; Pressure Test Of Piping Systems; Further Symbols And Abbreviations; Symbols - GF NeoFlow Betriebsanleitung

NeoFlow pressure reducing valve
2.5

Other applicable documents

Document
GF Utility planning fundamentals
Quick start instructions NeoFlow pressure reducing valve DN50-DN150
NeoFlow pressure reducing valve DN50 - DN150 datasheet
These documents are available through agents of GF Piping Systems or at www.gfps.com.
2.6

Pressure test of piping systems

The system test pressure (STP) must be determined for all pipes based on the system operating pressure (MDP). If the water surge
pressure is not calculated (most frequent case), the following calculation applies with the assumed system operating pressure
(MDPa):
STP = MDPa + 5.0bar and STP = 1.5 ∙ MDPa
The lesser value of these should be selected.
Based on the breaking points of the pipe material, the following maximum test pressures must be observed:
SDR17: STP20°C ≤ 12 bar
SDR11: STP20°C ≤ 21 bar
CAUTION!
Maximum permissible test pressure!
Danger of injury and/or material damage due to leaks in the piping system due to the wrong test pressure.
► Pressure test for piping systems with SDR11 ≤ 21 bar and SDR17 ≤ 12 bar.
► The component of the piping system with the lowest PN determines the maximum allowable test pressure in the piping section.
► For detailed information see the GF Utility planning fundamentals.
3

Further symbols and abbreviations

3.1

Symbols

Symbol Indication
Listed in no particular order.
•
►
Call for action: Here, something must be done.
1. Call for action in a certain order: Here, something has to be done in the specified order.
3.2

Abbreviations

Abbrevia- Indication
tion
AS Adjusting screw pilot valve
Cv Flow factor (US gal./min)
DN Nominal diameter
DV Damping valve
KH Ball valve
Kv Flow factor
PN Nominal pressure
PRV NeoFlow pressure reducing valve
P1 Inlet pressure
P2 Adjustable outlet pressure
8
Code
700671677
700278143
Instruction manual