Victaulic 867-7UF User manual

HANG THESE INSTRUCTIONS ON THE
INSTALLED VALVE FOR FUTURE REFERENCE
WARNING
• Read and understand all instructions before attempting to install, remove, adjust, or perform maintenance on any Victaulic piping products.
• Depressurize and drain piping systems before attempting to install, remove, adjust, or perform maintenance on any Victaulic piping
products.
• Wear safety glasses, hardhat, and foot protection.
• Save this installation, operation, and maintenance manual for future reference.
Failure to follow instructions and warnings could cause system failure, resulting in death or serious personal injury and property damage.
INSTALLATION, OPERATION, AND MAINTENANCE MANUAL I-867-7UF
867-7UF Pressure Relief Valve
I-867-7UF
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I-867-7UF / Pressure Relief Valve / Installation, Operation, and Maintenance Manual
TABLE OF CONTENTS
Hazard Identification ..................................4
Safety Instructions ...................................4
Introduction ........................................4
Optional Equipment...................................4
Valve Position-Flow Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Large Control Filter .....................................4
Installation .........................................5
Operation ..........................................7
Start Up..............................................7
Readjusting ...........................................7
Maintenance And Inspection Tests ........................8
Weekly Inspection ......................................8
Monthly Inspection And Test ..............................8
Troubleshooting......................................8
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I-867-7UF / Pressure Relief Valve / Installation, Operation, and Maintenance Manual
HAZARD IDENTIFICATION
Definitions for identifying the various hazard levels are provided below.
This safety alert symbol indicates important safety messages.
When you see this symbol, be alert to the possibility of
personal injury. Carefully read and fully understand the
message that follows.
DANGER
• The use of the word “DANGER” identifies an immediate
hazard with a likelihood of death or serious personal injury
if instructions, including recommended precautions, are not
followed.
WARNING
• The use of the word “WARNING” identifies the presence
of hazards or unsafe practices that could result in death or
serious personal injury if instructions, including recommended
precautions, are not followed.
CAUTION
• The use of the word “CAUTION” identifies possible hazards or
unsafe practices that could result in personal injury and product
or property damage if instructions, including recommended
precautions, are not followed.
NOTICE
• The use of the word “NOTICE” identifies special instructions that
are important but not related to hazards.
SAFETY INSTRUCTIONS
WARNING
• An experienced, trained installer
must install this product in
accordance with all instructions.
These instructions contain important
information.
• Depressurize and drain the piping
system before attempting to install,
remove, adjust, or maintain any
Victaulic piping products.
Failure to follow these instructions
can cause product failure, resulting in
death or serious personal injury and
property damage.
1. Read and understand all instructions before proceeding with the
installation, operation, and maintenance of this valve. For proper
operation and approval, the 867-7UF valve and accessories
must be installed in accordance with the specific instructions included
with the shipment.
2. Use only recommended accessories. Accessories and equipment
that are not approved for use with this valve may cause improper system
operation.
3. Wear safety glasses, hardhat, foot protection, and hearing
protection. Wear hearing protection if you are exposed to long periods of
noisy jobsite operations.
4. Prevent back injury. Large and pre-trimmed valves are heavy
and require more than one person (or mechanical lifting equipment)
to position and install the assembly. Always practice proper lifting
techniques.
5. Avoid using electrically powered tools in dangerous environments.
When using electrically powered tools for installation, ensure that the
area is moisture-free. Keep the work area well lit, and allow enough
space to accommodate proper installation of the valve, trim, and
accessories.
6. Watch for pinch points. Do not place fingers under the valve body
where they could be pinched by the weight of the valve. Use caution
around spring-loaded components.
7. Keep work areas clean. Cluttered areas, benches, and slippery floors
can create hazardous working conditions.
INTRODUCTION
NOTICE
• Drawings and/or pictures in this manual may be exaggerated for
clarity.
• The valve, along with this operating and maintenance instructions
manual, contains trademarks, copyrights, and/or patented
features that are the exclusive property of Victaulic.
The 867-7UF valve is a pilot-operated, diaphragm-type pressure relief
valve. It maintains a constant preset system pressure regardless of
changing demands. This valve relieves excess system pressure to sump
or atmosphere.
According to the inlet pressure, the pilot valve regulates the main valve
throttling. This valve requires only existing line pressure to operate.
OPTIONAL EQUIPMENT
VALVE POSITION-FLOW INDICATOR
This option provides the means for detecting motion of water through the
valve, according to requirements of NFPA 20. This item can be retro-fit
in the field.
LARGE CONTROL FILTER
This upgrade from the standard filter provides extra capacity for filtering
of the water supplied to the control loop to achieve the essential level of
debris-free water. This feature is recommended for cases in which there
is uncertainty regarding the level of particulate matter in the water.
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I-867-7UF / Pressure Relief Valve / Installation, Operation, and Maintenance Manual
INSTALLATION
1. Before the valve is installed, flush the pipeline to remove any dirt, scale, or debris. Failure to flush the line before installation may cause the valve
to become inoperable.
2. When the valve is used for individual pump pressure relief, place the relief valve between the pump and the pump discharge check valve. This
must be attached in a way that allows for easy removal for repairs without disturbing the piping.
3. Allow enough room around the valve assembly for any adjustments and future maintenance/disassembly work.
4. Install the valve in the pipeline with the valve flow arrow on the body casting pointing away from the pump. Use the lifting eye provided on the
main valve cover for lifting and lowering the valve.
5. For best performance, install the valve horizontally with the cover facing up. Other positions are acceptable, but care must be taken to fully
prime and purge air from the diaphragm chamber, and to ensure that the actuator can be easily removed for future maintenance.
6. After installation, carefully inspect/correct any damaged accessories, piping, tubing, or fittings. Ensure that there are no leaks.
Discharge Flow
Set Pressure
Discharge Chart
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I-867-7UF / Pressure Relief Valve / Installation, Operation, and Maintenance Manual
TYPICAL INSTALLATIONS
Figure 1 Installation Drawing
1
1
2
2
4
3
4
3
Flow
Flow
System
Components
1 Model 867-7UF
2 Fire pump
3 Check valve
4 Pressure gauge
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I-867-7UF / Pressure Relief Valve / Installation, Operation, and Maintenance Manual
OPERATION
The pressure relief pilot (Figure 2, call out 1) senses inlet pressure and
modulates the upper control chamber, causing the main valve to throttle,
thus sustaining constant inlet pressure. When the inlet pressure rises
above the pilot setting, the pilot opens, pressure in the upper control
chamber decreases, and the main valve modulates open to relieve inlet
pressure and sustain pilot setting.
The pressure relief valve is equipped with an adjusting screw (Figure 2,
call out 4) to preset the desired inlet pressure and an adjustable needle
valve (Figure 2, call out 5) to control the main valve closing speed.
START UP
1. Provide pump shut-off pressure to the 867-7UF valve inlet, allowing
no system demand.
2. Create sufficient pressure (higher than the pilot set pressure) to
allow flow through the relief valve.
3. While the relief valve is operating, wait for the valve inlet pressure to
stabilize. The pressure on the inlet side of the relief valve should be
according to the factory pre-set adjusted pressure.
4. Slowly allow system flow so that system pressure falls below the
pressure relief valve adjusted pressure. The valve should slowly
shut to drip-tight.
READJUSTING
Tools required:
• Flat head screwdriver
• Adjustable wrench
The pressure relief valve is factory pre-set. The pre-set is clearly
indicated on the valve data plate. If readjustment to either the pressure
or the valve response is required, complete the following steps.
1. Ensure that there is nominal flow through the valve.
2. Release the tension between the adjusting screw on the valve and
the fastening nut by turning the fastening nut counterclockwise.
3. By alternately turning the adjusting screw (Figure 2, call out 4) on
the pressure relief pilot (Figure 2, call out 1) by one-half turn and
then reading the outlet pressure, gradually adjust the pressure
counterclockwise to decrease the inlet pressure or clockwise to
increase the inlet pressure.
NOTE: Valve response adjustment affects pre-set pressure. Any
adjustment to valve response requires rechecking pre-set
pressure. See Start Up, steps 1–4.
4. Repeat the start up procedure in the previous section.
5. To adjust the valve response time, turn the adjustable needle valve
(Figure 2, call out 5) on the bottom of the pilot. Turn clockwise
(while facing the screw) to decrease the closing speed of the main
valve or counterclockwise to increase the closing speed of the main
valve.
6. Repeat the start-up procedure in the previous section.
Valve Closed Valve Open (pressure relief)
6
2
1
4
5
3
Figure 2 Operation Drawing
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I-867-7UF / Pressure Relief Valve / Installation, Operation, and Maintenance Manual
MAINTENANCE AND INSPECTION TESTS
NOTICE
• Any activities that require taking the valve out of service may
eliminate the fire protection provided.
• Consideration of a fire patrol should be given for the affected
areas.
• Before servicing or testing the system, notify the authority having
jurisdiction.
Prior to turning off any valves or activating any alarms, notify local
security guards and the central alarm station, if used, so that a false
alarm will not be signaled.
In any of the following inspections or testing procedures, if an abnormal
condition exists, see the troubleshooting section for possible cause and
corrective action.
The 867-7UF valve is to be inspected, tested, and maintained in
accordance with this manual and with NFPA 25.
WEEKLY INSPECTION
1. The system should be inspected under flow conditions.
2. Check that the main valve, pilot system, accessories, tubing, and
fittings are all in good condition, are free of damage, and are not
leaking.
3. The fastening nut of the pilot valve adjusting screw (Figure 2, call
out 4) should be fastened tightly.
4. For circulation-type installations, verify that sufficient water is
flowing through the valve when fire pump is operating at shut-off
pressure (churn) to prevent the pump from overheating.
5. Verify that the pressure upstream of the relief valve fittings in the
fire pump discharge piping does not exceed the pressure for which
the system components are rated.
MONTHLY INSPECTION AND TEST
1. Complete weekly inspection.
2. During the monthly fire pump flow test, verify that the pressure
relief valve is correctly set to relieve at the appropriate pressure and
to close below the pressure setting.
TROUBLESHOOTING
Problem Possible Cause Solution
Valve fails to regulate. Needle valve not properly adjusted. Factory set at ½ or 1½ open. Adjust.
Pulsates or hunts. Slowly adjust needle valve until pulsation stops.
Air trapped in main valve cover. Loosen cover tube tting at the highest point, allow the air
to escape, and re-tighten.
Filter screen blocked. Remove lter’s cap and screen to clean. Filter might be
insucient. See note below.
Valve fails to open. Insucient inlet pressure. Check/create inlet pressure.
Pilot is adjusted too high. Turn adjusting screw CCW on pilot.
Valve fails to seal inlet
pressure.
Filter screen blocked. Remove lter’s cap and screen to clean. Filter might be
insucient. See note below.
Debris trapped in main valve. Remove and inspect actuator assembly. Check seat. Check for
foreign bodies. Rinse at high ow rate.
Diaphragm in main valve is leaking. Open the valve cover and inspect diaphragm. If damaged,
replace.
Diaphragm in pilot valve is leaking.
NOTE: Mark “F” – Large Filter
In cases where the filter screen frequently becomes blocked, install a filter with filtration capacity of at least 80 mesh / 250 µm.
DIFFICULTY IN PERFORMANCE
Where difficulty in performance is experienced, the manufacturer or an
authorized representative should be contacted to determine if any field
adjustment is to be made.
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I-867-7UFINSTALLATION, OPERATION, AND MAINTENANCE MANUAL
867-7UF Pressure Relief Valve
For complete contact information, visit victaulic.com
I-867-7UF 9323 REV A UPDATED 12/2015
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