Watts 77S - Manual

For Residential and Commercial Applications
ES-77S-M1
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No. 77S
Series 77S M1
Cast Iron, Wye-Pattern Strainers
Sizes: 1 /
4
" – 3" (8-80mm)
The Series 77S Threaded, Wye-Pattern, Cast Iron Strainers
are manufactured by Watts. These strainers are designed to
protect system components from dirt, rust, and other damag-
ing debris in the piping system. Series 77S are used in steam
and liquid applications. They are furnished with a machined
seat that allows the screen to be self-aligning to assure a
perfect fit. All sizes come with a PTFE gasket, threaded screen
retainer cap, tapped blowdown connection, and an easily remov-
able stainless steel screen. Blowdown plug is not furnished.
Features
• Cast iron body
• Wye-pattern
• Tapped retainer cap
• Threaded connections
Pressure – Temperature
Maximum Working Pressure:
400psi (27.6 bar) at 150ºF (66ºC) WOG
250psi (17.2 bar) at 406ºF (208ºC) WSP
Specifications
A wye-pattern cast iron strainer to be installed as indicated
on the plans. The strainer must have a tapped retainer cap and
threaded end connections. Strainer shall be rated to 400psi
(27.6 bar) WOG at 150ºF (66ºC); 250psi (17.2 bar) WSP at
406ºF (208ºC). Strainer shall be a Watts Series 77S.
Standards
Complies with MIL-S-16293 Type 1
Materials
Body: ASTM A-126 Class B cast iron
Retainer Cap: ASTM A-126 Class B cast iron
Screen:
Stainless Steel
Gasket: PTFE
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 with-
out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
LEAD FREE
*
*The wetted surface of this product contacted by consumable
water contains less than one quarter of one percent (0.25%) of
lead by weight.
**This product complies with the Buy American Act and The
American Recovery and Reinvestment Act. For more information,
visit watts.com.
BAA/ARRA Compliant **