AVK 67 Series Manuel utilisateur
American AVK Company
An ISO 9001 registered company
Maintenance Manual Series 67
*Subject to change without notice. (rev.04/10 B)
AVK SERIES 67 - HIGH PRESSURE,
POST/FLUSHING HYDRANT
FIELD MAINTENANCE AND
INSTRUCTION MANUAL
TABLE OF CONTENTS
EXPLODED ASSEMBLY / PARTS LIST
INTRODUCTION / DESCRIPTION
RECEIVING AND STORAGE
INSTALLATION AND TESTING
- INSTALLATION
- TESTING
OPERATION AND MAINTENANCE
- HYDRANT TOOLS
- OPERATION
- MAINTENANCE PROCEDURES
- LUBRICATION
- INSPECTION
- DISASSEMBLY FOR INSPECTION
- REASSEMBLY AFTER INSPECTION
REPAIR PROCEDURES
- NOZZLE REPLACEMENT
- TRAFFIC REPAIR KIT
- MAIN VALVE REPLACEMENT
OPTIONAL EQUIPMENT
- EXTENSION KITS
TROUBLESHOOTING GUIDE
PARTS AND SERVICE
WARRANTY
AMERICAN AVK COMPANY
page 1
American AVK Series 67 Post / Flushing Hydrant
Exploded Parts Breakdown
F1
F2
F59
F52
F76
F500
F75
F501
F504
F506
F31
F505
F31
F34
F503
F73
F509
F506
F31
F73
F7
F515
F7
F514
F507
F38
F508
F516
F519
F21
F19
F24
F510
F518
F23
F502
F517
F31
F34
F73
F20
F22
page 2
Item No. Description Material
F1 Weathershield Bolt 304 Stainless steel
F2 Weathershield Grey Iron, ASTM126, Class “B”
F7 Valve Seat O-ring NBR
F19 Hose Nozzle Cap Grey Iron, ASTM126, Class “B”
F20 Hose Nozzle Copper Alloy
F21 Hose Nozzle Cap Gasket NBR
F22 Hose Nozzle O-ring NBR
F23 Set Screw - (Nozzle) 304 Stainless steel
F24 Chain Assembly Zinc Plated Steel
F31 Nozzle Section Washer 304 Stainless steel
F34 Nozzle Section Nut 304 Stainless steel
F38 Spring Pin 304 Stainless steel
F52 Thrust Nut O-ring NBR
F59 Set Screw - (Thrust Nut) 304 Stainless steel
F73 Flange O-ring NBR
F75 Zerk Fitting Case Hardened Steel, Zinc Plated
F76 Thrust Nut Copper Alloy
F500 Operating Nut Copper Alloy
F501 Anti Friction Washer Copper Alloy
F502 Stem Seal O-ring NBR
F503 Upper Stem Rod 304 Stainless steel
F504 Nozzle Section Ductile iron, ASTM A536
F505 Two Piece Breakable Flange Ductile iron, ASTM A536
F506 Nozzle Section Bolt Zinc Plated Steel
F507 Coupler Pin 304 Stainless steel
F508 Breakable Coupling 304 Stainless steel
F509 Lower Barrel Ductile iron, ASTM A536
F510 Lower Stem Rod ASTM A108, Mild Steel
F511* Standpipe Flange Ductile iron, ASTM A536
F512* Extension Coupling 304 Stainless steel
F513* Extension Stem Rod ASTM A108, Mild Steel
F514 Main Valve Flange Copper Alloy
F515 Seat Ring Copper Alloy
F516 Main Valve Retainer Pin 304 Stainless steel
F517 Cotter Pin 304 Stainless steel
F518 Main Valve EPDM Rubber encapsulated ductile iron
F519 Base Ductile iron, ASTM A536
* Not Shown in Exploded Parts Breakdown
page 3
INTRODUCTION / DESCRIPTION
The American AVK Series 67 Post / Flushing Hydrant is designed to be a trouble free, easy to maintain hydrant.
This manual will provide you with the information needed to properly install and maintain the re hydrant and to ensure a
long service life. Features of the American AVK Series 67 Post / Flushing Hydrant include an EPDM encapsulated one piece
main valve and a stainless steel upper stem. The series 67 is rated for a working pressure of 250 psi, meets or exceeds the
requirements of AWWA C502, Standard for Dry Barrel Fire Hydrants, (where applicable). The AVK Series 67 hydrant and
hydrant tools are designed so that one person can perform all repairs and maintenance outlined in this manual.
RECEIVING AND STORAGE
Inspect the hydrants upon receipt for damage in shipment. Note any damage on the bill of lading and have the driver
sign it. Notify American AVK. Unload all of the hydrants carefully to avoid damage. Verify that the hydrants have the correct
direction to open, the correct nozzle conguration and threads, the correct operating nut size and shape, the correct depth
of bury, and the correct inlet connection. Hydrants should remain clean and dry, and the main valve should be closed until
installed to prevent weather related damage. For long term storage the hydrants should be stored indoors.
INSTALLATION AND TESTING
NOTE: American AVK recommends AWWA Standard C600 and AWWA Manual M17 for further information
regarding hydrant installation and testing.
NOTE: Consult local codes and standards for proper re hydrant placement and spacing
WARNING: All water lines must be isolated or depressurized and drained before installing or maintaining re
hydrants. Failure to do so may cause pressure to be released resulting in severe injury or death.
INSTALLATION
Correct installation of the Series 67 Post / Flushing Hydrant is important for proper operation. The following steps are
general installation guidelines for a standard AVK Series 67 re hydrant. Local conditions may require variations.
1. Before installing a hydrant, check to make sure all bolts are tight and all nozzles are properly installed (See
NOZZLE INSTALLATION). Clean any dirt and debris from inside the hydrant base and from the pipe lead.
2. Install AVK Series 67 Post hydrants with the valve below the frost line and install adequate drainage, such as gravel.
Support all hydrants in upright positions. All hydrants shall be installed plumb. Include a separate gate valve or curb
valve and restraining joints in supply piping. Refer to Fig.1, Hydrant Installation.
page 4
Fig. 1
Hydrant Installation
Concrete
thrust block
Concrete
Curb
Concrete collar for protection on all
hydrant installations.
Drain Detail:
Caution: When pouring
thrust block, do not cover
drain holes.
1/3 cubic yard drain eld
rock.
Concrete
thrust block
Supply Valve
6"
2' min.
2" min.
2'
Bury
Concrete
page 5
PRESSURE TESTING
American AVK Recommended Hydrant Testing Procedure
AAVK recommends that AWWA M17, "Installation, Field Testing, and Maintenance of Fire Hydrants", chapters 4.3 and 4.4
be followed for field testing and placing the hydrant in service. The following is excerpted from AWWA M17 for the
reader's convenience:
PRESSURE TEST AT MAIN PRESSURE
1. Ensure that all nozzles are properly installed per section “NOZZLE INSPECTION & REPLACEMENT”
2. Remove the highest outlet-nozzle cap and open the hydrant valve a few turns. Allow water to reach the bottom of the
outlet nozzle. (If the hydrant is furnished with a tapped-plug air vent, then it is not necessary to remove the nozzle cap.
Just open the air vent.)
3. Replace the outlet-nozzle cap and leave it loose to permit all air to escape, or close the tapped-plug air vent.
4. After all air has escaped, tighten the outlet-nozzle cap.
5. Open the hydrant completely. (Opening the hydrant fully before all air has escaped will compress the air and cause a
safety hazard.) (AAVK comment: underlined as very important)
6. Check for leakage at flanges, outlet nozzles, and the packing or O-rings around the stem.
7. If leakage is noted, repair or replace the faulty components or the entire hydrant. (AAVK comment: only after hydrant
is closed and all pressure is bled off.)
8. Repeat the test until results are satisfactory.
PRESSURE TEST AT PRESSURES ABOVE MAIN PRESSURE
1. Connect a pressure-test pump to one of the hydrant's outlet nozzles.
2. Open the hose nozzle cap. Open the hydrant valve a few turns. Allow the hydrant to fill until water is at the
bottom of the outlet nozzle.
3. After all air has escaped, tighten the outlet-nozzle cap.
4. Open the hydrant completely.
5. Close the auxiliary valve.
6. Pump up to test pressure (usually 150 psi [1034 kPa]).
7. Check for leakage at flanges, outlet nozzles, and the packing or O-rings around the stem.
DRAINAGE TEST
1. Remove one of the Hose Cap (F19) and fill the hydrant with water.
2. With the hydrant in the closed position, place the palm of one hand over the open Hose Nozzle (F20). As the water drains
from the hydrant it should create a noticeable vacuum indicating proper drainage.
page 6
67-065-59
Series 67 T-Wrench
67-080-59
Series 67 Hydrant Wrench
OPERATION AND MAINTENANCE
HYDRANT TOOLS
Description Part Number
Series 67 T-Wrench, for Main Valve removal/replacement. 67-065-59
Series 67 Hydrant Wrench, for Thrust Nut removal/replacement, 67-080-59
hydrant operation, and Cap removal/replacement.
METRIC AND INCH WRENCH REQUIREMENTS FOR AMERICAN AVK HYDRANTS
PART INCH SIZE METRIC SIZE
Weathershield Retaining Bolt (Allen) 5/16” 8mm
Thrust Nut Retaining Screw (Allen) 5/32” 4mm
Nozzle Retaining Screw 3/16” 5mm
All other Bolts and Nuts 15/16” 24mm
page 7
OPERATION AND MAINTENANCE
OPERATION
The American AVK Series 67 Post / Flushing Hydrant is designed to be an easily operated, low torque, high ow post
hydrant. It will not require excessively high loads to operate. It is possible to damage the hydrant by forcing it beyond its
normal operational limits.
The American AVK thrust bearing hydrant requires a minimum of torque to operate.
1. Check direction of opening as marked on the hydrant Weathershield (F2).
2. To Open, turn the Operating Nut (F500), in the opening direction, indicated by an arrow on the Weathershield (F2), until the
Main Valve (F518), hits the stop in the hydrant Base (F519). Do not force the hydrant in the opening direction beyond
full open as indicated by sudden resistance to turning. If water does not ow when the hydrant is open, it is probably
due to a closed valve upstream from the hydrant.
3. To close, turn the operating nut until the Main Valve stops the ow. It is not necessary to close this style of hydrant with great
force. Once the ow has stopped, loosen the operating nut in the opening direction, 1/2 to 1 turn to take the strain off the
operating parts of the hydrant and to make it easier to open the hydrant.
F2, Weathershield
Note: Open Left shown.
F518, Main Valve, resting against
stop in Base (F519), in the full
"OPEN" position.
F518
F519
Fig. 2
Operation
page 8
MAINTENANCE PROCEDURES
The American AVK Series 67 Post / Flushing Hydrant is designed to be a trouble free, easy to maintain hydrant. The following
steps are recommended to provide trouble free operation.
LUBRICATION
CAUTION: For grease servicing, ensure that the Weathershield bolt has been loosened to prevent damage to the internal
O-rings. Relling is performed by loosening the Weathershield bolt (F1) with a 5/16” or (8mm) hexagon key. Rell lubricant
reservoir with a food grade grease using a grease gun on the Zerk Fitting (F75). Tighten the Weathershield Bolt (F1).
Servicing should be checked and performed at least once per year if required, or per local municipal requirements.
Fig. 3
Lubrication
F1, Weathershield Bolt
F75, Zerk Fitting
page 9
INSPECTION
DISASSEMBLY FOR INSPECTION:
The American AVK Series 67 Post / Flushing Hydrant is designed to be a trouble free, easy to maintain hydrant. The following
steps are recommended to provide trouble free operation.
WARNING: For all of the following repair procedures, the hydrant must be isolated or the system depressurized and drained
before removing the hydrant components. Failure to do so may cause pressure to be released resulting in
severe injury or death.
NOZZLE INSPECTION
1. After making sure the hydrant is not pressurized, remove a hose cap (F19).
2. Locate the Set Screw (F23) hole. It is located approximately ½" in from the edge of the nozzle section and at about the
4:30 to 5:00 o'clock position. If this retaining screw is missing, ensure that the nozzle is correctly installed as shown in
Fig. 4, then immediately replace it (F23-Setscrew, M10 x 16 304 stainless steel) with a 5mm or 3/16” hexagon key.
3. There should be a small "dimple" or punch mark on the hose nozzle (F20), this mark should be in alignment with the
nozzle retaining screw as shown in Fig. 4. If it isn't, remove the setscrew (F23), rotate the nozzle until the alignment
is correct. Apply a drop of thread-locker (Loctite #242 or equal) to the end of the setscrew, tighten it until it contacts the
nozzle, and back off 1/8th of a turn. Replace the hose nozzle cap (F19).
Fig. 4
Nozzle Inspection
Dimple
Set Screw in
nozzle slot.
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