GF DN50 Bedienungsanleitung

GF Piping Systems

Operating instructions

NeoFlow Pressure Reducing Valve DN50-DN150

The NeoFlow Pressure Reducing Valve is Co-developed with OFUI

1276507

GFDO_MA_00049 / 00 (01.2022)

8201 Schahausen/Schweiz

GF Piping Systems

Instruction manual

NeoFlow pressure reducing valve

DN50-DN150

GF Piping Systems

Translation of the original instruction manual

Disclaimer

The technical data within this document is not binding. It does not constitute expressly warranted characteristics, guaranteed properties

or guaranteed durability. It is subject to modiﬁcation. Our General Terms of Sale apply.

Observe instruction manual

The instruction manual is part of the product and an important element within the safety concept.

►Read and observe instruction manual.

►Always have instruction manual available by the product.

►Give instruction manual to all subsequent users of the product.

Instruction manual NeoFlow pressure reducing valve

Table of contents

1 Product description 5

1.1 Intended use 5

1.2 EC Manufacturer's declaration 5

1.3 Technical data 6

2 Safety Information 7

2.1 Observe instruction manual! 7

2.2 Commissioning and use by qualiﬁed personnel only 7

2.3 Storage and transport 7

2.4 Warning signals 7

2.5 Other applicable documents 8

2.6 Pressure test of piping systems 8

3 Further symbols and abbreviations 8

3.1 Symbols 8

3.2 Abbreviations 8

4 Design and function 9

4.1 Subassemblies 9

4.2 Designations of the valves 9

4.3 Mode of operation 10

5 Installation process 11

5.1 Carrying out the basic setup 11

5.2 Installation area 14

5.3 Installation 16

5.4 Initial operation 18

6 Operation 20

6.1 Setting outlet pressure P2 20

7 Service 22

7.1 Regular valve inspection 22

Instruction manualNeoFlow pressure reducing valve

7.2 Cleaning ﬁlter and control system 23

7.3 Removal of the NeoFlow pressure reducing valve 26

7.4 De-installation of the control system 28

7.5 Maintenance of the control system 30

8 Troubleshooting 36

8.1 Reducing outlet pressure ﬂuctuations 36

8.2 Flow chart A 38

8.3 Flow chart B 39

9 Disposal 40

10 Spare parts list 40

10.1 Spare parts kits 40

10.2 Pilot spring 40

11 Accessories 41

11.1 Manometer connections (optional) 41

11.2 Controller compatibility overview 41

12 Components and subassemblies 42

12.1 General overview 42

12.2 Main Body 42

12.3 Control block 43

12.4 Pilot valve 43

Instruction manual NeoFlow pressure reducing valve

1 Product description

1.1 Intended use

The pilot-controlled NeoFlow pressure reducing valve from Georg Fischer Piping Systems Ltd. was designed for the automatic pres-

sure and ﬂow control in networks for the supply and distribution of potable water.

The NeoFlow pressure reducing valve is designed to ﬁt between standard PN10/PN16 ﬂanges in a wafer-type arrangement. ANSI150

ﬂange compatibility is also available (excl. DN80).

Foreseeable misuse

The NeoFlow pressure reducing valve may not be used as a pure shut-o valve. Media other than potable water as well as water

containing an amount of disinfectant may only be used in consultation with a contact partner from Georg Fischer Piping Systems Ltd..

The use of solid matter in the medium can aect the function of the NeoFlow pressure reducing valve. For this reason, use is only

recommended with an upstream strainer.

1.2 EC Manufacturer's declaration

The manufacturer Georg Fischer Piping Systems Ltd., 8201 Schahausen (Switzerland) explains that the NeoFlow pressure redu-

cing valve fully complies with the standard “EN 1074-5 Valves for water supplies.”

If the overall system does not comply with the requirements of an EC directive, then putting the NeoFlow pressure reducing valve is

prohibited until the conformity of the overall system with the EC directive has been declared.

Fittings Involved standards

NeoFlow Pressure reducing valve EN 1074-5

Changes to the ﬁttings that could eect the stated technical data and the intended use, void this manufacturer's declaration.

Additional information can be found in "GF planning fundamentals.”

Schahausen, 08/12/2021

Bastian Lübke

Head of Global R&D

Georg Fischer Piping Systems Ltd.

CH-8201 Schahausen (Switzerland)

Instruction manualNeoFlow pressure reducing valve

1.3 Technical data

1.3.1 Speciﬁcations

Speciﬁcations

Pressure ratings and perfor-

mance

Maximum inlet pressure P1 16 bar*

Maximum outlet pressure P2 16 bar**

Outlet pressure range 0.1 to 16 bar**

Minimal pressure dierence P1– P2 0.2 bar***

Materials Casing POM-C

Piston POM-C

Elastomers EPDM

Fittings Stainless Steel / Brass

Pilot control Stainless steel, POM-C, PTFE

Flanges Metric: PN10/16 Imperial: ANSI 150

*With medium temperature ≤ 20°C; >20°C on request **Depending on the pilot valve type ***Dependent on ﬂow and size

1.3.2 Kv 100 values

(mm)

Inch

(")

Kv 100

(m3/h)

Kv 100

(l/min)

Cv 100

(US gal./min)

DN50 2 30 500 35

DN80 - 73 1217 84

DN100 4 130 2167 150

DN150 6 266 4433 307

Instruction manual NeoFlow pressure reducing valve

2 Safety Information

2.1 Observe instruction manual!

The instruction manual is part of the product and an important component within the safety concept. Non-observance may lead to

severe injuries.

• Read and observe instruction manual.

• Always have instruction manual available by the product.

• Give instruction manual to all subsequent users of the product.

2.2 Commissioning and use by qualiﬁed personnel only

• Product and accessories should be exclusively put into operation by persons who have the necessary training, knowledge, or

experience.

• Regularly instruct personnel on ll uestions regrding the locl regultions pplying to occuptionl sfety nd environmen-

tl protection, especilly for pressurized pipes.

The following target groups are addressed in these operating instructions:

• Operators: Operators are instructed in the operation of the product and observe the safety guidelines.

• Service sta: The service sta have been professionally trained and carry out maintenance work.

2.3 Storage and transport

The product must be handled, transported and stored with care. Please note the following points:

►Transport and store the product in its unopened original packaging.

►Protect the product from harmful physical inﬂuences such as dust, heat, humidity and UV radiation.

►The product and its components must not be damaged either by mechanical or thermal inﬂuences.

►Check the product for general damage prior to installation.

2.4 Warning signals

In this instruction manual, warnings are used, which shall warn the user of death, injuries or material damage. Always read and

observe these warnings!

DANGER!

Imminent danger!

Non-observance may result in major injuries or death.

►Measures to avoid the danger.

WARNING!

Possible danger!

Non-observance may result in serious injuries.

►Measures to avoid the danger.

CAUTION!

Dangerous situation!

Non-observance may result in minor injuries.

►Measures to avoid the danger.

ATTENTION!

Dangerous situation!

Non-observance may result in material losses.

Instruction manualNeoFlow pressure reducing valve

2.5 Other applicable documents

Document Code

GF Utility planning fundamentals 700671677

Quick start instructions NeoFlow pressure reducing valve DN50-DN150 700278143

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-

tion

Indication

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

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