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Related Manuals for GF DN50
Summary of Contents for GF DN50
- Page 1 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) © Georg Fischer Piping Systems Ltd 8201 Schaffhausen/Schweiz...
- Page 2 GF Piping Systems...
- Page 3 GF Piping Systems Instruction manual NeoFlow pressure reducing valve DN50-DN150...
- Page 4 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.
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Page 5: Table Of Contents
Instruction manual NeoFlow pressure reducing valve Table of contents Product description Intended use EC Manufacturer's declaration Technical data Safety Information Observe instruction manual! Commissioning and use by qualified personnel only Storage and transport Warning signals Other applicable documents Pressure test of piping systems Further symbols and abbreviations Symbols Abbreviations... - Page 6 NeoFlow pressure reducing valve Instruction manual Cleaning filter and control system Removal of the NeoFlow pressure reducing valve De-installation of the control system Maintenance of the control system Troubleshooting Reducing outlet pressure fluctuations Flow chart A Flow chart B Disposal Spare parts list 10.1 Spare parts kits...
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Page 7: Product Description
Pressure reducing valve EN 1074-5 Changes to the fittings that could effect the stated technical data and the intended use, void this manufacturer's declaration. Additional information can be found in "GF planning fundamentals.” Schaffhausen, 08/12/2021 Bastian Lübke Head of Global R&D Georg Fischer Piping Systems Ltd. -
Page 8: Technical Data
*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 Inch Kv 100 Kv 100 Cv 100 (mm) (") (l/min) (US gal./min) DN50 DN80 1217 DN100 2167 DN150 4433... -
Page 9: Safety Information
Instruction manual NeoFlow pressure reducing valve Safety Information 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. •... -
Page 10: Other Applicable Documents
700278143 NeoFlow pressure reducing valve DN50 - DN150 datasheet These documents are available through agents of GF Piping Systems or at www.gfps.com. 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... -
Page 11: Design And Function
Instruction manual NeoFlow pressure reducing valve Design and function Subassemblies Designation Main body Control block Pilot valve Inlet control line Outlet control line Direction of flow medium Designations of the valves Ball valve Designation Ball valve inlet Ball valve outlet Ball valve control chamber Ball valve control block Ball valve outlet side (manometer connection) -
Page 12: Mode Of Operation
NeoFlow pressure reducing valve Instruction manual Mode of operation Number Designation Main body Control block Pilot valve Valve piston Control chamber Adjusting screw pilot valve Inlet pressure Adjustable outlet pressure The axial movement of the valve piston (4) in the main body (1) results in flow changes in the NeoFlow pressure reducing valve and thus regulates the existing outlet pressure (P2). -
Page 13: Installation Process
Instruction manual NeoFlow pressure reducing valve Installation process ATTENTION! Danger of breaking by faulty lifting! The NeoFlow pressure reducing valve may not be lifted or rested on the pilot valve or the control lines. ► For dimensions ≤ DN150 lift the NeoFlow pressure reducing valve only at the main body. Carrying out the basic setup Loosen lock nut. - Page 14 NeoFlow pressure reducing valve Instruction manual Open ball valves KH1, KH2 and KH3 and make sure that KH4, KH5, and KH6 are closed. Position 1: Ball valve KH closed Position 2: Ball valve KH open To allow monitoring of inlet pressure P1 and outlet pressure P2, it is recommended to connect a manometer to the ball valves KH6 (inlet pressure P1) and KH5 (outlet pressure P2).
- Page 15 Open the damping valve (DV) counter clockwise according to the following table depending on the nominal diameter of the NeoFlow pressure reducing valve. Nominal diameter DV turns in the (mm) counter clockwise direction DN50 DN80 DN100 DN150...
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Page 16: Installation Area
► If needed, additional measures must be made for the pilot regulator to protect it against frost, adverse effects of the weather, and floods. ► In case of unclear operating conditions, consult with a contact partner from GF Piping Systems. 5.2.2 Arrangement of the fittings The following configuration is recommended for the installation. - Page 17 Instruction manual NeoFlow pressure reducing valve 5.2.3 Configuration of the fittings with bypass lines For existing installations with bypass lines, the following configuration is recommended. ► The shut-off valves must be securely connected to the bypass line before the NeoFlow pressure reducing valve is put into ope- ration.
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Page 18: Installation
NeoFlow pressure reducing valve Instruction manual Installation 5.3.1 Preparations ► Make sure that all pipe parts are flushed prior to the installation. The pipes must be free of wood chips, scale, or other desposits. ► To prevent contamination, make sure that disinfection procedures are used on all connections. ►... - Page 19 Ensuring that the bolts for the flange connection can be installed at least on one installation side. ► Take into account high temperature difference during installation – retighten flange connections. ► Installation of the flange connection according to the information in the GF planning fundamentals. WARNING!
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Page 20: Initial Operation
NeoFlow pressure reducing valve Instruction manual Initial operation CAUTION! Danger of material damage in the pipeline system. When commencing the initial operation via the main pipeline there is the danger that the initial pressure is too high and the pipeline system is damaged. - Page 21 Instruction manual NeoFlow pressure reducing valve Open the hydrant (H) slowly. Allow a suitable flow rate to pass through the NeoFlow pressure reducing valve (N). Depending on the dimension: for example, DN100 5 l/s up to 10 l/s. SLOW With an outlet manometer KH5 check the outlet pressure P2 for stability after 10 minutes. The outlet pressure P2 is reached depending on the inlet pressure, the position of the adjustment bolt on the pilot valve, and the opening of the hydrant (H).
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Page 22: Operation
NeoFlow pressure reducing valve Instruction manual Operation Setting outlet pressure P2 Slowly increase or decrease the spring tension of the pilot spring (AS) by turning the adjusting screw pilot valve to achieve the desired outlet pressure P2. The following table provides information for this purpose. Ensure a change in the outlet pressure P2 takes place via an outlet manometer at KH5. - Page 23 Instruction manual NeoFlow pressure reducing valve Slightly open the outlet shut-off valve (O) slowly. SLOW Fully close the hydrant (H) slowly. Fully open the outlet shut-off valve (O). SLOW Using the adjusting screw pilot valve (AS) to finalise the setting of the desired outlet pressure P2 (shown on the outlet mano- meter at KH5) and fix it with a locking nut.
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Page 24: Service
NeoFlow pressure reducing valve Instruction manual Tighten carefully. Service WARNING! Maintenance by qualified personnel only! Incorrect handling can damage the NeoFlow pressure reducing valve. ► Only allow maintenance by persons who have the required training, knowledge or experience. WARNING! Uncontrolled exit of the medium due to residual pressure! Uncontrolled exit of the medium and/or flowing out of the medium from the open pipe and/or the valve. -
Page 25: Cleaning Filter And Control System
Instruction manual NeoFlow pressure reducing valve Cleaning filter and control system ATTENTION! The filter and control system of the NeoFlow pressure reducing valve can be serviced and cleaned under pressure. ► For this purpose, the ball valves KH1-6 must be in the stated position. Close the ball valves KH1-3 in in the following order: KH3, KH1, KH2 Carefully unscrew the filter sealing plug (5) and remove the filter (3). - Page 26 NeoFlow pressure reducing valve Instruction manual Flush the control system with water by slowly opening KH1 and KH2 carefully after each other. CAUTION! Exiting medium! If the sealing plug is removed, the medium exits uncontrollably from the control block main body (1). ►...
- Page 27 Instruction manual NeoFlow pressure reducing valve 10. To clean the pilot valve, unscrew the sealing plug (22), remove the control spring (21) and control cylinder (20) with the actuator pin (19) and blow out using compressed air. 11. Clean the sealing plug (22) and reassemble, glue the sealing plug (22) with bolt retention. Notice: After opening, the threads must be thoroughly cleaned and coated with sealing drinking water-safe thread glue during assembly, e.g.
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Page 28: Removal Of The Neoflow Pressure Reducing Valve
NeoFlow pressure reducing valve Instruction manual Removal of the NeoFlow pressure reducing valve Shut off the NeoFlow pressure reducing valve with the two shut-off valves on the inlet and outlet (A and O). Make sure that all KH1-3 and KH5-KH6 are open. Carefully open KH4 to reduce the pipe pressure. - Page 29 Instruction manual NeoFlow pressure reducing valve CAUTION! Exiting medium! If KH4 is open, the medium exits uncontrollably from the ball valve. This may lead to injury or material damage. ► Assume a protected position. ► Only open ball valves slowly. ►...
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Page 30: Installation Of The Control System
NeoFlow pressure reducing valve Instruction manual De-installation of the control system Remove the valve from the pipe network. Bring the ball valves KH1-3 into the closed position. Completely loosen the nuts of the control lines (1-4) to remove the control lines on the inlet and outlets. Release the damping valve (DV) by loosening the retaining ring. - Page 31 Remove both bolts from the control block and lift the control system off the main body. Notice: The bolts are located underneath the “+GF+” sticker. The film can be penetrated by a pointy object, e.g. a screwdriver. Loosen the transition nipple (19) between the control block (13) and the pilot valve (1) to separate the two subassemblies. Notice: The transition nipples are glued in with sealing thread glue.
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Page 32: Maintenance Of The Control System
NeoFlow pressure reducing valve Instruction manual Maintenance of the control system 7.5.1 Pilot valve Code Designation 173021000 Pilot valve repair kit Contains: (12), (16), (19), (20) and (21) 19 20 14 15 10 11 Designation Adjusting screw pilot valve (AS) Locking nut Indication disc Spring case... - Page 33 Instruction manual NeoFlow pressure reducing valve Dismantling ATTENTION! Exiting medium! Injury or material damage due to exiting medium. The following requirements must be met for carrying out the next steps: ► The NeoFlow pressure reducing valve must be removed from the piping system, see section «7.3 Removal of the NeoFlow pres- sure reducing valve»...
- Page 34 NeoFlow pressure reducing valve Instruction manual Remove the diaphragm casing (14) from the pilot body (17) and check the o-ring (16) for wear or damage. Replace if required. Cleaning To clean the pilot valve, unscrew the sealing plug (22), remove the control spring (21) and control cylinder (20) with the actuator pin (19), check all components for wear and blow out using compressed air.
- Page 35 Instruction manual NeoFlow pressure reducing valve Assembly Assembly is the reverse process. On reassembly, lightly lubricate all sliding components (spring guide) and seals with a drin- king-water safe lubricant such as Molykote 111 or Klübersynth UH1 64-2403. Tighten the 8 bolts for the spring case (4) crosswise to the torque value recommended on the nameplate using a torque wrench. 7.5.2 Control block ATTENTION!
- Page 36 NeoFlow pressure reducing valve Instruction manual 7.5.3 Main body seals Code Designation 173021004 -7 Dimension-based o-ring kit Contains: (6) and (7) Designation Casing body Casing bolt connection (4 bolts) Valve piston Spring seat Main spring O-ring Casing body seal Guide pin Main body ►...
- Page 37 Instruction manual NeoFlow pressure reducing valve Remove the valve piston (3). Check the o-ring (6) for wear or damage and replace, if required. Assembly Assembly is the reverse process. On reassembly, lightly lubricate all seals with a drinking-water safe lubricant such as Molyko- te 111 or Klübersynth UH1 64-2403.
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Page 38: Troubleshooting
NeoFlow pressure reducing valve Instruction manual Troubleshooting Troubleshooting must be exclusively handled by authorised service personnel! Reducing outlet pressure fluctuations The damping valve (DV) can be used to set the reaction time, thus changing the stability of the control loop within the NeoFlow pres- sure reducing valve can be changed. - Page 39 Instruction manual NeoFlow pressure reducing valve If stability cannot be reached, repeat the procedure for adjusting the damping valve (DV) «5.1 Carrying out the basic setup» on page 11. ATTENTION! Pressure fluctuation despite adjustment of the damping valve! If, despite adjustment of the damping valve (DV) there are pressure fluctuations at the outlet manometer KH5, proceed as follows. ►...
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Page 40: Flow Chart A
NeoFlow pressure reducing valve Instruction manual Flow chart A The NeoFlow pressure reducing valve is exhibiting a faulty function (e.g. leakage, desired outlet pressure cannot be reached, or outlet pressure cannot be maintained). Are there any visible leaks on the NeoFlow pressure reducing valve? Fittings/Pipes... -
Page 41: Flow Chart B
NeoFlow pressure reducing valve (close stop at the shut-off valve on inlet side). Release outlet? pressure at KH4-6 - Uninstall NeoFlow pressure reducing valve and check for damage Address your GF Piping Systems contact partner if occurring errors cannot be fixed. -
Page 42: Disposal
Correct disposal! ► Separate materials (plastics, metals, etc.) and dispose of them in accordance with local regulations. If you have any questions regarding the disposal of the product, please contact your national GF Piping Systems representative. Spare parts list 10.1... -
Page 43: Accessories
Instruction manual NeoFlow pressure reducing valve Accessories 11.1 Manometer connections (optional) Measuring devices such as manometers can be installed on the ball valves KH4-6. Sensors can be connected directly to the ball valves via the standard BSP ¼“ inch internal thread. Ball valve Designation Manometer connection inlet side... -
Page 44: Components And Subassemblies
NeoFlow pressure reducing valve Instruction manual Components and subassemblies 12.1 General overview Designation Pilot valve Hex plug Spacer plate Socket head bolt M6x25 Control block base Inlet ball valve Sealing plug 90° bolt connection Ball valve outlet Main body Ball valve control chamber Valve chamber transition nipple Control block Control block bolt connection... -
Page 45: Control Block
Instruction manual NeoFlow pressure reducing valve 12.3 Control block Designation Control block main body Label Filter O-ring sealing plug Filter sealing plug 12.4 Pilot valve 19 20 14 15 10 11 Designation Adjusting screw pilot valve (AS) Locking nut Indication disc Spring case Screws (8) for the spring case Upper Spring Guide... - Page 46 NeoFlow pressure reducing valve Instruction manual...
- Page 48 GF Piping Systems Worldwide at home Our sales companies and representatives ensure local customer support in more than 100 countries. www.gfps.com Argentina / Southern South America France Mexico / Northern Latin America Singapore Georg Fischer Central Plastics Sudamérica S.R.L. Georg Fischer SAS Georg Fischer S.A.
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