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INSTRUCTION MANUAL
L-Series Butterfly Valves
F6..L, F7..L
Ductile Butterfly Valves
Technical Data
Service
Flow characteristic chilled, hot water, 60% glycol
F6 modifi ed equal percentage
F7 linear
90°
8” to 10” for use with ANSI Class 125/150 fl anges
Controllable fl ow range
Sizes
Type of end fi tting
Materials
Body
Body fi nish
Disc
Seat
Shaft
Bushings
Media temperature range
Body pressure rating
Close-off pressure
Rangeability
Maximum velocity
Leakage
Warranty ductile iron ASTM A536 polyester powder coated
304 stainless steel
EPDM
420 stainless steel
Steel, PTFE, Bronze
-22 °F to 250°F [-30°C to 120°C]
232 psi
200 psi
10:1 (for 30° to 70° range)
12 FPS
0%
5 Years
Installation Recommendations
15 ...
20°
>0
2
1 3
90°
Outdoor
360
°
Indoor Only
90°
®
L-Series Butterfly Valves
Instruction Manual
®
D6..WL
8
4
1
6
5
2
3
7
8
4
12
10
1
6
5
2
9
3
11
7
Max Torque for Bolts
Valve Size
8”
10”-12”
Bolt Size
3/4-10”
7/8-9”
Max Torque [ft-lbs]
120
200
Valve Installation Procedure
Position the connecting pipe flanges in the line to insure proper alignment prior to valve installation. Spread the pipe flanges apart enough to allow the valve body to be located between the flanges without actually contacting the flange surfaces. Exercise particular care in handling the valve so as to prevent possible damage to the disc or seat faces.
Note: Actuator must be mounted at or above pipe center line for all actuator types.
1. When installing in Victaulic piping systems, use Victaulic 41 series flange nipples. 741 flanges not recommended without the use of adapter rings.
2. L-Series Butterfly valves are designed to be installed between ANSI
125/150 flat-faced, raised face, slip-on or weld neck flanges.
3. Do NOT use flange gaskets on L-Series Butterfly valves.
4. For Lug style valves: a. Place the valve between the flanges. b. Install all bolts between the valve and the mating flanges. Hand tighten bolts as necessary.
5. Before completing the tightening of any bolts, the valve should be centered between the flanges and then carefully opened and closed to insure free, unobstructed disc movement.
6. Using the sequence, tighten the flange bolts evenly to assure uniform compression. In assembling flange joints, the resilient seating surface shall be uniformly compressed.
7. If an actuator is to be operated, electricity should be connected to the unit in accordance with the local electrical codes.
8. Cycle the valve to the fully open position, then back to the fully closed position, checking the actuator travel stop settings for proper disc alignment. The valve should be operated to assure that no binding is taking place. If no power is available, use the manual handwheel.
9. The valve is now ready for operation.
General Maintenance
The following periodic preventative maintenance practices are recommended for all Butterfly Valves.
1. Operate the valve from full open to full closed to assure operability.
2. Check flange bolting, actuator mounts and hangers for evidence of loosening and correct as needed.
3. Inspect the valve and surrounding area for previous or existing leakage at flange faces or shaft connections.
4. Check piping and/or wiring to actuators and related equipment for looseness and correct as needed.
5. If not in use, exercise the butterfly valve (full open and close) at least once a month.
Safety Precautions
Before removing the valve from the line or loosening any bolts, it is important to verify the following conditions:
1. Be sure the line is depressurized and drained.
2. Be sure of the pipeline media. Proper care should be taken for protection against toxic and/or flammable fluids.
3. Never remove the valve without an Operator (Manual or Automatic) already attached to the valve shaft.
4. Never remove the Operator from the valve while the valve is in the pipeline under pressure.
5. Always be sure that the disc is cracked approximately 5° off of the closed position before removing the valve.
Storage of Butterfly Valve Assemblies
• Assemblies must be stored indoors, protected from the elements.
• Materials received on job sites that have long installation lead times should receive extra protection from construction damage.
• Valve faces must be protected from abrasion, cutting and nicking, as this will damage the face and may cause flange area leaks.
• Electric actuators cannot be stored in wet, damp or caustic areas.
• Do not store construction material on top of valve assemblies.
2

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