Watts 77S User Manual download pdf

For Residential and Commercial Applications

ES-77S-M1

Job Name

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Contractor

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Job Location

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Approval

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Engineer

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Contractor’s P.O. No.

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Approval

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Representative

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No. 77S

Series 77S M1

Cast Iron, Wye-Pattern Strainers

Sizes:

/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

1 2

Summary of Contents

Page 1 - LEAD FREE

For Residential and Commercial ApplicationsES-77S-M1Job Name ––––––––––––––––––––––––––––––––––––––––––– Contractor –––––––––––––––––––––––––––––

Page 2 - Dimensions — Weights

Standard Screens SIZE SCREEN OPENINGS MATERIALS in. mm 1/4 - 21/2 8-65 20 mesh 304SS 3 80 3/64"perf 304SSPerformance Data1⁄4" - 2

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Watts 77S User Manual

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