Watts LFS777S User Manual
For Liquid and Steam Service
ES-LF777S
Job Name
Job Location
Engineer
Approval
LEAD FREE
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*
Series LF777S,
LFS777S
Wye-Pattern Lead Free* Bronze
Strainers
Sizes: 1⁄2" – 4" (15-100mm)
Series LF777S, LFS777S Wye-Pattern Lead Free* Bronze Strainers
are designed to protect system components from dirt, rust and
other damaging debris in the piping system. This series features
a retainer cap tapped for closure plug. The LF777S and LFS777S
feature Lead Free* construction to comply with Lead Free* installation requirements.
Features
• Lead Free* cast copper silicon alloy body
• Wye-pattern
• Retainer cap tapped for closure plug
Contractor
Approval
Contractor’s P.O. No.
Representative
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LF777S
Models
LF777S – 1⁄2" – 4" (15 – 100mm) threaded connections
LFS777S –
1
⁄2" – 2" (15 – 50mm) solder connections
Specifications
A wye-pattern Lead Free* bronze strainer to be installed as indicated on the plans. Lead Free* Wye-Pattern Cast copper silicon
alloy Strainers shall be constructed using Lead Free* materials.
Lead Free LF777S and LFS777S shall comply with state codes and
standards, where applicable, requiring reduced lead content. The
strainer must have retainer cap tapped for closure plug. Strainer
shall be rated to 400psi (27.6 bar) WOG @ 210ºF (99ºC); 125psi
(8.6 bar) WSP @ 353ºF (178ºF) for sizes
and 300psi (20.7 bar) WOG @ 210ºF (99ºC); 125psi (8.6 bar) @
353ºF (178ºC) for size 4" (100mm). Strainer shall be a Watts Series
LF777S (threaded ends) or LFS777S (solder ends).
1
⁄2" – 3" (15 – 75mm)
LFS777S
BAA/ARRA Compliant
**This product complies with the Buy American Act and The
American Recovery and Reinvestment Act. For more information, visit watts.com.
*The wetted surface of this product contacted by consumable
water contains less than 0.25% of lead by weight.
**
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
Materials
Body: Lead Free* cast copper silicon alloy
Retainer Cap:
Cap Gasket:
Standard Screen:
1
⁄2" (15mm): Lead Free* copper silicon alloy
3
⁄4" – 4" (20-100): Lead Free* cast copper
silicon alloy
1
⁄2" – 2" (15-50mm): EPDM
Other sizes consult factory
1
⁄2" – 21⁄2" (15-65mm): 304 stainless steel
#20 mesh,
3" (75mm):
perforated screen
4" (100mm):
3
⁄64" (1.2mm) 304 stainless steel
1
⁄8" (3mm) 304 stainless steel
perforated screen
Pressure – Temperature
Maximum Working Pressure:
1
⁄2" – 3" (15-75mm)
400psi (27.6 bar) WOG @ 210ºF (99ºC)
125psi (8.6 bar) WSP @ 353ºF (178ºF)
4" (100mm)
300psi (20.7 bar) WOG @ 210ºF (99ºC)
125psi (8.6 bar) WSP @ 353ºF (178ºF)
Screen Options
304 Stainless Steel Wire Mesh Liners: (#30, #40, #60, #80, #100)
304 Stainless Steel Perforated Screens: (
Consult factory for ordering codes
Performance Data
1000
400
200
100
80
60
40
30
20
10
8
Flow (water) - gpm
6
5
4
3
2
1
0.1 .2 .3 .4 .5 .6 .8 1 2 3 4 5 6 8 10 20 20 40 50 60 80 100
Pressure Drop - psi
1
⁄32", 3⁄64", 1⁄16", 1⁄8", 3⁄16", 1⁄4")
4" 3" 21⁄2
2"
1
⁄2"
1
1
⁄4"
1
1"
3
⁄4"
1
⁄2"
3
⁄8"
1⁄
"
4
Strainer Size
Dimensions —Weights
LF777S
Size (dn) dimenSionS weight
in. mm in. mm in. mm in. mm lbs. kgs.
1
⁄4 8 211⁄16 68 111⁄16 43
3
⁄8 10 211⁄16 68 111⁄16 43
1
⁄2 15 3 76 2 51
3
⁄4 20 35⁄16 84 25⁄16 59
1 25 4
1
⁄4 32 51⁄8 130 31⁄8 79
1
1
⁄2 40 57⁄8 149 33⁄4 95 1 25 4.0 1.81
1
2 50 6
1
⁄2 65 81⁄8 206 415⁄16 125 11⁄4 32 12.0 5.44
2
3 75 10
4 100 13 325 10
LFS777S
Size (dn) dimenSionS weight
in. mm in. mm in. mm in. mm lbs. kgs.
1
⁄2 15 33⁄8 86 21⁄16 52
3
⁄4 20 33⁄4 95 29⁄16 65
1 25 5 127 3 76
1
⁄4 32 55⁄8 143 31⁄4 82
1
1
⁄2 40 67⁄16 164 313⁄16 97 1 25 4.0 1.81
1
2 50 7
A B C (NPT)
3
⁄8 10 1.7 0.77
3
⁄8 10 1.7 0.77
3
⁄8 10 1.7 0.77
1
1
⁄2 114 25⁄16 59
3
⁄16 157 47⁄8 124 11⁄4 32 7.4 3.36
1
⁄8 257 611⁄16 170 11⁄2 40 24.0 10.90
A B C (NPT)
1
⁄2 191 45⁄8 118 11⁄4 32 7.4 3.39
1
⁄2 267 11⁄2 40 41.0 18.60
⁄2 15 1.7 0.77
3
⁄4 20 2.7 1.22
3
⁄4 20 3.0 1.36
3
⁄8 10 1.5 0.68
1
⁄2 15 1.6 0.73
3
⁄4 20 2.5 1.13
3
⁄4 20 2.8 1.25
A
B
C
nPt
LF777S
A
B
C
nPt
LFS777S
A Watts Water Technologies Company
USA: Tel: (978) 688-1811 • Fax: (978) 794-1848 • www.watts.com
Canada: Tel: (905) 332-4090 • Fax: (905) 332-7068 • www.watts.ca
ES-LF777S 1333 © 2013 Watts
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