Nibco LD2000 Series Assembly instructions

Installation, Operating and Maintenance Instructions Installation, Operating and Maintenance Instructions
®®
NIBCO INC.
WORLD HEADQUARTERS
WEB: www.nibco.com
1516 MIDDLEBURY STREET
ELKHART, IN 46516-4740
USA
DOMESTIC CUSTOMER SERVICE
PHONE: [phone]
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INTERNATIONAL OFFICE
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MV951X001.109
Cast Iron ‘Y’ Strainer Connected to LD2000 or N200 Butterfly Valves
123
4
About NIBCO Strainer Kits
• The components in this kit were selected for use in HVAC applications.
• The kit should be fitted between ASME/ANSI B16.1 Class 125 flanges. In
accordance with ASME B16.5 & 5.3.5, and ASME B16.42 & 6.2.3, a higher class
flange shall be flat faced.
• The kit shall not be installed in a system that exceeds the lowest rated component of
the kit.
• The kit should not be installed in a predominately copper piping system. See
NIBCO Technical Bulletin - Dielectric Products Relative to Electrolysis and Galvanic
Corrosion, NTB-0714-01 for additional detail as necessary.
• The strainer may be mounted in horizontal, vertical or inclined pipework. When
installed in horizontal pipework the orientation of the body should be such that the
cover is immediately below. At low level pipe runs, the gap between the ground
and the strainer must be sufficient to allow for the withdrawal of the strainer screen.
In vertical or inclined pipework the flow direction shall be downwards only.
• This kit does not included the fasteners, nor the strainer end flange gasket needed
to connect the kit to the piping system.
• As supplied, the kit components are joined with ASTM A307 Grade B or SAE J429
Grade 2 bolting material.
• Should your kitted components be affixed with studs, the studs are also specified as
ASTM A307 Grade B or SAE J429 Grade 2. Supplied nuts are ASTM A563
Grade B or SAE J995 Grade 2. Always check for correct bolting for your system.
• For best performance and reliability, the water in your HVAC system shall be
properly treated for chemical and mineral composition.
Bolt Tightening Patterns
Crisscross tightening pattern for LD2000 series butterfly valves
6
1
5
3
7
2
4
8
1
24
9
28
5
16
32
20
4
21
12
25
29
8
13
17
218 14
23
10
27
6
31
15
19
3
22
11
26
7
30
VALVE
Figure 1
Crisscross with cross-over tightening pattern for N200 series butterfly valves
Figure 2
1Only qualified personnel should undertake the procedures outlined in this document.
NIBCO INC., its agents, representatives and employees assumes no liability for the
use of these procedures. These procedures are offered as suggestions only.
2Recommended fastener tightening torque tightening torques are made without warranty.
Install must verify proper fasteners for the application.
Torque data assumes clean, non-lubricated fasteners.

Installation, Operating and Maintenance Instructions Installation, Operating and Maintenance Instructions
®®
2 3
Installation Instructions1
F721APLL, F721APLG, F721APSL and F721APSG with LD2000 Series Butterfly
Valves.
1. Ensure internal diameter of flanges, fittings, and pipe are compatible with the
butterfly valve for proper seal-face integrity and disc operation. See NIBCO Rubber
Lined Butterfly Valve IOM for additional details as necessary.
2. Ensure the mating pipeline flange faces are clean and undamaged, and the pipe
bores are clean and free from debris.
3. Close the valve completely to avoid possible damage.
Position the kit into the pipeline, taking care not damage the integrally molded seat
4. liner.
5. Insert the strainer flange gasket.
6. NIBCO LD2000 series butterfly valves have integral rubber faces that seal to the
attaching flange; therefore, a separate gasket is not necessary and should not be
used.
7. Carefully open the valve to assure free unobstructed disc movement.
8. After proper operation is verified, tighten all fasteners to the minimum
recommended torques listed below, using a crisscross pattern as shown in below in
Figure 1.
NOTE: Care shall be taken to prevent over tightening to prevent possible product
and property damage.
9. Cycle the valve to confirm unobstructed disc movement.
F721APNL and F721APNG with N200 Series Butterfly Valves.
1. Ensure internal diameter of flanges, fittings, and pipe are compatible with the
butterfly valve for proper seal-face integrity and disc operation. See NIBCO Rubber
Lined Butterfly Valve IOM for additional details as necessary.
2. Ensure the mating pipeline flange faces are clean and undamaged, and the pipe
bores are clean and free from debris.
3. Close the valve completely to avoid possible damage.
4. Position the kit into the pipeline, taking care not damage the cartridge seat liner.
Insert the strainer flange gasket. NIBCO N200 series butterfly valves have rubber
5. faces that seal to the attaching flange; therefore, a separate gasket is not necessary
and should not be used.
6. Carefully open the valve to assure free unobstructed disc movement.
7. The strainer-to-valve bolting will also need to be properly tightened.
8. The F721APNL and F721APNG kits are shipped with strainer-to-valve bolting in the
hand tight condition.
Installation Instructions Continued
F721APNL and F721APNG with N200 Series Butterfly Valves.
9. The cartridge style seat construction of the N200 series butterfly valve prohibits
complete tightening prior to installation in the piping system.
10. After proper operation is verified, tighten all fasteners to the minimum
recommended torques listed below, using a crisscross and cross-over pattern as
shown below.
10.1 It is critical that the cartridge liner be evenly compressed from both sides
ofthe mating flanges. (Refer to NIBCO Technical Bulletin - Installation Precautions
and Instructions for Large-Diameter Cartridge-Liner Butterfly Valves, NTB-1012-03
for additional details).
10.2 NIBCO recommends a multi-stepped process utilizing the crisscross and cross-over
pattern be used to draw the flanges against the liner from both side of the valve
at the same rate, ensuring the liner is compressed evenly. See Figure 2.
NOTE: Care shall be taken to prevent over tightening to prevent possible product
and property damage.
11. Cycle the valve to confirm unobstructed disc movement.
Maintenance
See NIBCO F721AP Strainer IOM for strainer maintenance.
See NIBCO Rubber Seated Butterfly Valve IOM for valve maintenance.
These documents, and more are available at NIBCO.com
Shipment and Storage
Butterfly valve discs are shipped in the nearly closed position to protect the sealing edge
and prevents the liner from taking a temporary set. The stem bushings and disc edge have
been coated with a factory-applied lubricant to prolong storage and service life.
The kits may be shipped or stored in any position, but care shall be taken to protect the
valve actuation hardware. Valves shall be stored indoors, and for a maximum of 10
years between a temperature range of 40˚ F to 90˚ F (4˚C to 32˚C).
2Recommended Fastener Tightening Torques
Flange Size Bolt Size Minimum Bolt
Torque (ft lbs)
Maximum Bolt
Torque (ft lbs)
2” to 4” 5⁄8”20 70
5” to 8” ¾” 30 120
10” and 12” 7⁄8”50 200
14” and 16” 1” 70 240