N E T A F I M U S A Hydrometers OPERATION AND MAINTENANCE MANUAL NETAFIM USA 5470 E. Home Ave. • Fresno, CA 93727 888.638.2346 • 559.453.6800 FAX 800.695.4753 www.netafimusa.
This manual is intended for use by the users of this equipment. The information contained herein is the property of Netafim USA and may not be copied, used, or disclosed to others without the manufacturer’s prior written approval. Users are cautioned that the material contained herein is subject to change by the manufacturer at any time and without prior notice. The material in this manual is intended for informational purposes only.
Table of Contents INTRODUCTION General Description .............................................................4 Water Meter/Registers .........................................................4 Hydraulic Valve (Flow Sensor) . ..........................................4 Specifications and Dimensions ............................................5 Netafim USA Hydrometers with Electrical Output .............7 Electrical Output Specifications (Reed Switch Reg.) ..........7 Transducer Type . .....................
Introduction GENERAL DESCRIPTION A hydrometer combines a hydraulic master valve, water meter and a flow sensor in a single unit. Netafim USA’s Hydrometer is designed for high pressure, remote control irrigation and industrial applications. Body: Horizontal Available Sizes: 1½”, 2”, 3”, 4”, 6” and 8” Operation: For automatic and remote operation in a variety of applications. Remote operation is possible via an external solenoid valve activated by a remote controller or control center.
Specifications and Dimensions SPECIFICATIONS Size 1 ½” 2” 3” 4” 6” 8” Maximum Working Pressure (psi) 230 230 230 230 230 230 Minimum Working Pressure (psi) 14 14 14 14 14 14 Regulated Pressure Ratio 1:3 1:3 1:3 1:3 1:3 1:3 Maximum Flow Rate (GPM) 55 95 220 380 860 1500 Minimum Flow Rate (GPM) Accuracy 4.
Specifications, Cont. Headloss Charts 1 ½” 5.0 5.0 6” 4.0 2” Headloss (psi) Headloss (psi) 4.0 3.0 3” 2.0 1.0 4” 8” 3.0 2.0 1.0 0 50 100 150 200 250 0 200 400 Flow Rate (gpm) 600 800 1000 1200 1400 Flow Rate (gpm) Pressure loss in psi = (gpm/Cv)^2 Example: 2” Hydrometer, design flow @ 97 gpm (55 gpm/35 gpm)^2 = 2.
Specifications, Cont. NETAFIM USA HYDROMETERS WITH ELECTRICAL OUTPUT Netafim USA Hydrometers are equipped with electrical output devices that combine the high reliability of hermetically sealed, magnetically driven registers with a wide variety of electrical output options. Hydrometers (measuring instruments) provide electrical output information about the flow of water.
Specifications, Cont. U.S. GALLONS U.S.
Specifications, Cont. Photo-Diode (PD & PDH) Register • Sensor combines an IR light source and a light sensitive diode in one package. • Signals are created when the light beam created by the IR light is interrupted by a rotating element. • Requires a constant supply of DC power. Note: Sunlight will interfere with the IR light and may corrupt or interfere with the signal—keep dust cap closed during operation to ensure proper signal output.
Transducer Type Transducer Type: Reed Switch and Photo Diode K Factors Photo Diode (PD) and Photo Diode High Frequency Pulse (PDH) Reed Switch (RS) Meter Size Standard Output 1½” 1 10 100 0.1 0.0053 1 0.1 0.01 10 187.900 60.00 600.00 6000.00 6.00 0.319 1 10 100 0.1 0.0085 Pulse per gallon K factor 10.00 0.01 10 117.000 6000.00 6.00 0.5100 1 10 100 0.1 0.0205 1 0.1 0.01 10 48.710 60.00 600.00 6000.00 6.00 1.232 1 10 100 1 0.
Specifications, Cont. Min GPM Max GPM ± 5% ± 2% 1.8 5.3 14 21 53 97 55 95 220 380 860 1,500 Meter Size 1½” 2” 3” 4” 6” 8” Connection Male Pipe Thread Female Pipe Thread Flanged Flanged Flanged Flanged Register Output Type Pulse per Galon Gallons per Pulse PD 10 0.1 PDH 187.900 0.0053 RS 1 1 PD 10 0.1 PDH 117.000 0.0085 RS 1 1 PD 10 0.1 PDH 48.710 0.0205 RS 1 1 PD 10 0.1 PDH 17.933 0.0556 RS 1 1 PD 1 1 PDH 5.747 0.1741 RS 0.
Hydrometer Internal Components Hydrometer Internal Components (Double Chamber Not Available in 6”) 12 • Hydrometers Operation and Maintenance Manual
Installation A. Installation Requirements Globe Configuration Straight Pipe Installation Requirement • Globe configuration hydrometers 0 x D and 0 x D require no straight pipe installation Upstream Downstream Meter requirements. Do not install valves Size Distance Distance Length that will cause a restriction directly 1 ½” 0” 0” 6 5/16” upstream or downstream of the 2” 0” 0” 8 5/8” hydrometer. 3” 0” 0” 11 1/2” • Connections to the hydrometer 4” 0“ 0” 14 1/8“ should be the same size as the meter.
Installation, Cont. CONTROL SYSTEM A. Solenoid Connection The hydrometer receives commands from the controller or control center via an external solenoid valve. The hydrometer may be ordered with a factory installed solenoid valve or connected to an solenoid valve supplied by the user. To connect to a factory installed solenoid: 1. Connect the electric cable from controller to the attached solenoid valve.
Drainage Valve DRAINAGE VALVE At the beginning of the winter it is necessary to drain the water from the pipeline in order to prevent the pipes from bursting. (Please refer to the drawing below) • Before draining, it is very important to ensure that there is no pressure in the line. • Dissassemble plug (1) • Assemble the drainage ball valve (2) • Assemble elbow (3) CAUTION: Do not use compressed air to blow out hydrometer.
Operational Testing INSTALLATION Before the hydrometer is placed into service, you should perform the following tests to verify that it is operating properly: A. To test water flow and manual operation: • Set 3-Way Selector to the “Open position”. • Turn on the water flow to the hydrometer. • Visually verify that water is flowing downstream from the hydrometer in appropriate quantities. • Verify that the leak detector, pointers and the totalizer are functioning properly.
Operations The hydrometer is designed to operate in a variety of automatic and remote control applications. The hydrometer valve is also capable of manual operation and the register dial may be read as an ordinary water meter. A. Manual Operation The hydrometer may be manually operated using the 3-Way Selector: • To manually open the valve: Rotate the 3-Way Selector to the “Open” position. • To manually close the valve: Rotate the 3-Way Selector to the “Close” position. 3-Way Selector B.
Typical Applications PRESSURE SUSTAINING The pressure sustaining operation prevents the input pressure from falling below a predetermined value. This application requires a Netafim Pressure Regulating Pilot Valve, or comparable valve. Rotate the adjusting screw atop the pilot valve counterclockwise to increase the desired input pressure and clockwise to reduce the desired input pressure.
Typical Applications, Cont. PRESSURE REDUCING The pressure reducing operation prevents the output pressure from increasing above a predetermined value. This application requires a PC Pressure Regulating Pilot Valve, or comparable valve. Rotate the adjusting screw on top of the pilot valve counterclockwise to increase the desired output pressure and clockwise to reduce the desired output pressure.
Troubleshooting This chapter provides detailed troubleshooting procedures and solutions for a variety of common problems. The procedures described below are general in nature and are presented in a “Quick Reference” style outline format. We recommend that you perform the steps in order until the specific problem is solved. It may not be necessary to complete all of the steps in a given procedure. A. Leakage from Hydrometer Connection to Pipeline • Inspect and tighten the couplings or flange bolts.
Troubleshooting, Cont. E. Controller Indicates Valve Opening Failure • Verify that the 3-Way Selector is in the “Auto” position. If it is not, turn the switch to the “Auto” position and then check to see if the controller indicates that the valve is open. • Verify that the controller and your software are functioning properly. If not, restart the controller and make certain that your software is properly configured. • Verify if there is water flow downstream from the hydrometer.
Troubleshooting, Cont. I. Excess or Insufficient Output Pressure • Inspect the control hoses, connectors, shuttle valves and adapters. Replace as necessary. • Rotate the adjustment screw atop of the pilot valve. Rotate clockwise to increase pressure or counterclockwise to reduce pressure as necessary. • Remove and clean the finger strainer. Replace if necessary.
Maintenance Preparation The hydrometer requires no routine periodic maintenance. In the unlikely event that the hydrometer fails to operate as expected, please follow the troubleshooting procedures as outlined on pages 20-22. If and when the troubleshooting procedures necessitate the inspection or replacement of internal parts, use the procedures contained in this chapter to perform the required action.
Maintenance 1½” - 8” Hydrometers HYDROMETER REMOVAL FROM PIPELINE The hydrometer is designed for easy site repairs. Removal from the pipeline is not required for dis-assembly and most repairs. The following removal instructions are included in the unlikely event that the hydrometer needs to be disassembled and repaired in the shop. 1½” and 2” Models The 1½” model may only be attached, using a coupling, to a male threaded pipeline.
Maintenance 1½” - 8” Hydrometers, Cont. FINGER STRAINER CLEANING AND REPLACEMENT It is not necessary to remove the hydrometer from the pipeline or to disassemble it in order to perform this procedure. To Remove the Finger Strainer: • Locate the inlet connection on the hydrometer body. • Remove the angle nipples and other connection devices. • Turn the nut counter-clockwise to loosen the finger strainer. • Gently pull the finger strainer out. • Clean or replace as necessary.
Maintenance 1½” and 2” Models 1½” and 2” Hydrometers The dis-assembly of the hydrometer is divided into the following assemblies: • • • Cover Assembly Diaphragm/Stem and Base Assemblies Inlet Spider/Strainer Assembly Perform only those procedures necessary to inspect and replace parts as directed by the troubleshooting procedures. It is recommended to replace the various o-rings and gaskets during dis-assembly as well as to inspect certain other parts.
Maintenance 1½” and 2” Models, Cont. DIAPHRAGM/STEM DIS-ASSEMBLY • • • • • Separate the base assembly from the cover (12). Visually inspect the diaphragm (37), valve cover (32) and stem assembly (36) for damage or excessive wear. If replacement is needed, continue with the following steps. Remove the six screws (39) from the diaphragm retaining ring (38). Lift the ring off of the diaphragm (37). Lift the diaphragm (37) off of the stem (36).
Maintenance 1½” and 2” Models, Cont. INLET SPIDER AND STRAINER Dis-assembly • Loosen the impeller bushing (29) located atop the inlet spider screw (24) and bushing (28). Pull the entire inlet spider screw assembly up and out. • Pull the inlet spider (27) upward and remove it from the hydrometer body (21). Inspect for cracks or excessive wear and replace as necessary. • Remove and replace the body o-ring (26). • Remove the strainer (25). Clean and inspect for damage or excessive wear.
Maintenance 3” and 4” Models HYDROMETER DIS-ASSEMBLY AND REASSEMBLY Dis-assembly of the 3” and 4” hydrometer is divided into the following assemblies: • Cover Assembly • Diaphragm/Stem and Base Assemblies • Inlet Spider/Strainer Assembly Perform only those steps necessary to inspect and replace parts as directed by the troubleshooting procedures. It is recommended to replace the various o-rings and gaskets during dis-assembly as well as to inspect certain other parts.
Maintenance 3” and 4” Models, Cont. DIAPHRAGM/STEM ASSEMBLY AND BASE ASSEMBLY Diaphragm/Stem Dis-assembly • Pull the diaphragm and stem assemblies up and out from the hydrometer cover (11). The central bushing (13) remains attached to the cover. • Unscrew and remove the central bushing (13) from the cover (11). • Inspect the upper and lower central bushing o-rings (12,14). Replace as necessary. • Visually inspect the diaphragm (18), valve cover (39) and stem (40) for damage or excessive wear.
Maintenance 3” and 4” Models, Cont. INLET SPIDER AND STRAINER Dis-assembly • Loosen and remove the impeller bushing (36), the inlet spider bearing nut (35) and the inlet spider bearing washer (34). • Remove the inlet spider tube (33). • Inspect the inlet spider o-ring (32) and replace as necessary. Re-assembly • Replace the inlet spider tube (33) • Replace the inlet spider bearing washer (34) and nut (35) onto the inlet spider shaft (31) and tighten.
Maintenance 6” Models HYDROMETER DIS-ASSEMBLY AND REINSTALLATION The dis-assembly of the 6” hydrometer is divided into the following subassemblies: • Register • Hydrometer Cover • Diaphragm and Stem Assemblies • Stem and Valve Seal Assemblies • Impeller and Flow Tube Assemblies • Inlet Spider Assembly Perform only those procedures necessary to inspect and replace parts as directed by the troubleshooting procedures.
Maintenance 6” Models, Cont. DIAPHRAGM AND UPPER STEM BEARING Dis-assembly • Unscrew and remove the 12 screws (17) and remove the upper diaphragm ring (18). • Remove the diaphragm (19). • Inspect for cracks or excessive wear and replace as necessary. • Inspect the upper stem wiper (20) and replace as necessary. • Remove the upper stem bearing (21) from inside the stem (24). Inspect the upper stem bearing (21) along with the upper stem bearing o-ring (22) and the stem o-ring (15). Replace as necessary.
Maintenance 6” Models, Cont. IMPELLAR AND FLOW TUBE SUB-ASSEMBLIES Dis-assembly • Remove valve seat base (45) from atop the flow tube (41). Be careful not to damage the impeller shaft. Inspect for excessive wear and replace as necessary. • Remove the impeller assembly (43). Inspect for cracks or excessive wear and check that the impeller shaft is perfectly straight. Replace if necessary. • Remove the flow tube (41). • Inspect and replace as necessary.
Maintenance 8” Models HYDROMETER DIS-ASSEMBLY AND RE-ASSEMBLY The dis-assembly of the 8” hydrometer is divided into the following logical assemblies: • Register • Hydrometer Cover • Diaphragm Sub-assembly • Lower Chamber Disc Sub-assembly • Stem and Valve Cover Sub-assemblies • Impeller and Flow Tube Assemblies • Inlet Spider Assembly Perform only those procedures necessary to inspect and replace parts as directed by the troubleshooting procedures.
Maintenance 8” Model, Cont. DIAPHRAGM SUB-ASSEMBLY DIS-ASSEMBLY Dis-assembly and Re-assembly • Remove the sixteen ½” screws (21) from the upper diaphragm ring (22). • Lift the upper diaphragm ring (22) off of the diaphragm (23). • Lift the diaphragm (23) off of the lower diaphragm disc (25). • Place the replacement diaphragm (23) onto the lower diaphragm disc (25). • Place the upper diaphragm ring (22) over the diaphragm. • Replace and tighten the ½” screws (21) into the upper diaphragm ring.
Maintenance 8” Model, Cont. STEM SUB-ASSEMBLY AND VALVE COVER Follow this procedure only if it is necessary to replace the stem bearings or the valve cover. Otherwise, skip this section: Dis-assembly and Re-assembly • Inspect the upper stem bearing wiper (36). Replace as necessary. • Remove the upper stem bearing (37) from the stem (41). • Inspect the upper stem bearing o-rings (38,39). Replace as necessary. • Unscrew and remove the stem locking nut (48), located at the bottom of the stem subassembly.
Maintenance 8” Models, Cont. IMPELLAR AND FLOW TUBE ASSEMBLIES Dis-assembly • Remove valve seat base (49) from atop the flow tube (55). Be careful not to damage the impeller shaft. Inspect the valve seat base for excessive wear and replace as necessary. • Remove the impeller (50). • Inspect for cracks or excessive wear and check that the impeller shaft is perfectly straight. Replace if necessary. • Remove the flow tube (55). • Inspect and replace as necessary.
Schematics SCHEMATICS TABLE OF CONTENTS Manual Electric 1½”, 2” Hydrometer, Manual Electric Normally Closed, 8mm Tubing................................... 40 1½”, 2” Hydrometer, Manual Electric Normally Open, 8mm Tubing...................................... 41 3”, 4” Hydrometer, Manual Electric Normally Closed, 8mm Tubing...................................... 42 3”, 4” Hydrometer, Manual Electric Normally Open, 8mm Tubing.........................................
• Hydrometers Operation and Maintenance Manual 1 1 1 1 2 1 2 2 1 BRASS FINGER FILTER 1/4" X 1/8" 15CONT-8-I 61SF25SB Descripti on PE TUBING 8MM 55P4684802 Compon en t Part No. Plastic male branch tee 8mmx 1/8" npt Plastic male 90-Elbow 8mmx 1/8" npt 55P4694802 Plastic male connector 8mm x1/8" npt 3-WAY VALVE 1/8" X 1/8" 62SV21/8M 55P4724802 BRASS HEX NIPPLE 1/8" SOLENOID 3-WAY 24VAC N.O. 55B216P2 Basic Hydrometer 1.
1 1 1 1 2 1 2 2 1 BRASS FINGER FILTER 1/4" X 1/8" 61SF25SB Descripti on PE TUBING 8MM 15CONT-8-I Compon en t Part No. Plastic male branch tee 8mmx 1/8" npt 55P4694802 Plastic male connector 8mm x1/8" npt Plastic male 90-Elbow 8mmx 1/8" npt 62SV21/8M 55P4684802 3-WAY VALVE 1/8" X 1/8" 36SOLNC-024 55P4724802 BRASS HEX NIPPLE 1/8" SOLENOID 3-WAY 24VAC N.C. 55B216P2 Basic Hydrometer 1.
• Hydrometers Operation and Maintenance Manual 1 1 1 1 2 1 2 2 1 Ite m QT Y 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 PLASTIC MALE CONNECTOR 8MM X 1/8" PE TUBING 8MM BRASS FINGER FILTER 1/4" X 1/8" 55P4714802 55P4684802 15CONT-8-I 61SF25SB Descripti on PLASTIC MALE BRANCH-TEE 8MM X 1/8" 55P4684802 Compon en t Part No. 3-WAY VALVE 1/8" X 1/8" MALE PLASTIC MALE 90-ELBOW 8MM X 1/8" 36SOLNO-024 62SV21/8M BRASS HEX NIPPLE 1/8" SOLENOID 3-WAY 24VAC N.O.
1 1 1 1 2 1 2 2 1 61SF25SB Descripti on BRASS FINGER FILTER 1/4" X 1/8" Compon en t Part No. Units: English [metric] PE TUBING 8MM 15CONT-8-I Tolerances: Heat Treatment: N/A Surface Finish: N/A Quantity: 1 Scale: 1=1 PLASTIC MALE CONNECTOR 8MM X 1/8" 55P4684802 PLASTIC MALE BRANCH-TEE 8MM X 1/8" PLASTIC MALE 90-ELBOW 8MM X 1/8" 62SV21/8M 9 55P4684802 3-WAY VALVE 1/8" X 1/8" MALE 36SOLNC-024 5 55P4714802 BRASS HEX NIPPLE 1/8" SOLENOID 3-WAY 24VAC N.C.
• Hydrometers Operation and Maintenance Manual Compon en t Part No. Ite m QT Y 36SOLNO-024 LHM6FG 61SF25LB 55P4684802 62SBV25 62SV41/4M 55B2225P4 55P4684802 55P4684804 55B222P44 61APS1/8 55B209P42 55B216P2 55B222P42 55P4714804 15CONT-8-I 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 2 9 1 10 1 11 2 12 1 13 1 14 1 15 2 16 11 17 18 19 2 Descripti on SOLENOID3-WAY 3-WAY24VAC 24VACN.O. N.O.
Ite m QT Y 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 2 9 1 10 1 11 2 12 1 13 1 14 1 15 2 16 11 17 18 19 SOLENOID3-WAY 3-WAY24VAC 24VACN.O. N.C.WITH SOLENOID 36SOLNC-024 Compon en t Part No.
• Hydrometers Operation and Maintenance Manual 1 1 1 1 1 2 5 2 1 1 1 3 1 1 1 Ite m QT Y 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Compon en t Part No. 36SOLNO-024 Descripti on SOLENOID 3-WAY 24 VAC N.O.
1 1 1 1 1 2 5 2 1 1 1 3 1 1 1 Ite m QT Y 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Compon en t Part No. 7 Descripti on SOLENOID 3-WAY 24 VAC N.C.
• Hydrometers Operation and Maintenance Manual 1 1 1 1 1 2 5 2 1 1 1 3 1 1 1 Ite m QT Y 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Compon en t Part No. Descripti on SOLENOID 3-WAY 24 VAC N.O.
1 1 1 1 1 2 5 2 1 1 1 3 1 1 1 Ite m QT Y 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Finished Goods Part No. LHMxxFG-PRMEL Compon en t Part No. LHM3,4FG 61SF25SB 36PIL29-117-GRY 62SV21/8M 55P4694802 55P4724802 15CONT-8-I 55P4684802 55B209P42 55B2225T4 61APS1/8 3624235309 55P4684804 55B216P2 36SOLNC-024 Variable Part No. LHMxxFG Descripti on SOLENOID 3-WAY 24 VAC N.C.
• Hydrometers Operation and Maintenance Manual 1 1 1 1 1 2 5 2 3 2 2 3 1 1 1 1 2 1 Ite m QT Y 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Compon en t Part No. Descripti on Tolerances: Heat Treatment: N/A Surface Finish: N/A Quantity: 1 BRASS ADAPTER 1/4"F X 1/8"M 2 Units: English [metric] 16 9 2 1 Close Date: 4/21/08 Engr: Material: ASTM 1020 Auto 14 Scale: 1=1 9 8 6 1 12 BALL VALVE BRASS 1/4" 11 17 13 15 4 BRASS ADAPTER 1/4"F X 1/4"M SOLENOID 3-WAY 24 VAC N.O.
1 1 1 1 1 2 5 2 3 2 2 3 1 1 1 1 2 1 Ite m QT Y 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Compon en t Part No. Descripti on BRASS ADAPTER 1/4"F X 1/8"M BALL VALVE BRASS 1/4" BRASS ADAPTER 1/4"F X 1/4"M SOLENOID 3-WAY 24 VAC N.C.
• Hydrometers Operation and Maintenance Manual NETAFIM USA 5470 E. Home Ave. • Fresno, CA 93727 888.638.2346 • 559.453.6800 FAX 800.695.4753 www.netafimusa.
