Emerson B302 Manual

YARWAY B302, B303, B318 AND B320 BIMETALLIC STEAM TRAPS AND AIR ELIMINATORS

SUMMARY OF INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

Before installation, these instructions must be carefully read and understood.

INSTALLATION

• Before installation, remove plastic covers

placed on flanges or connection ends. The

equipment has an arrow for Inlet/Outlet

designations. Be sure that it is installed in the

appropriate direction.

• Install the steam trap at a point where the

condensate tends to accumulate. A strainer

can be installed upstream of the trap for

additional protection.

MAINTENANCE

• We recommend that the steam traps are

serviced as necessary. Steam traps should be

checked periodically (at least yearly), to verify

that they are operating correctly and to clean

the internal parts and strainer screen.

• When reassembling, make sure that all

gasket faces are clean and always use a new

gasket. Tighten cover bolts uniformly in a

diagonal sequence.

WARNING

At startup, the presence of small particles in the

water (dirt, scale, weld splatters, etc.) may cause

an imperfect closure of the seat. If this occurs,

clean the equipment accordingly.

Do not touch the equipment without appropriate

protection during operation because it may

conduct heat if the used fluid is at high

temperature.

Before starting maintenance, be sure that the

equipment is not pressurized or hot.

The equipment must be used within its pressure

and temperature limits, otherwise it might fail

(refer to nameplate or documentation).

Do not remove the nameplate attached to the

equipment. Serial number and other useful

information are stamped on it.

INSTALLATION POSITION

RECOMMENDED INSTALLATION

WRONG INSTALLATION

YARWAY B302, B303, B318 AND B320 BIMETALLIC STEAM TRAPS AND AIR ELIMINATORS

SUMMARY OF INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

Solutions business unit of Emerson Electric Co. The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their

prospective owners.

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be

construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed

by our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time

without notice.

Emerson Electric Co. does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of

any Emerson Electric Co. product remains solely with the purchaser.

Emerson.com

For additional information, please visit: https://www.emerson.com/en-us/catalog/yarway-p001408

RATINGS AND SPECIFICATIONS

Specification Series

B302 B303 B318 B320

Operating Principle Thermostatic

Type Bimetallic

Size ½" - 1" ½" - 1" 1½" - 2" ½" - 1" ½" - 1"

Maximum Operating Pressure (psig) 247 464 1233 1595

Maximum Operating Temperature (°F) 482 572 932 977

Nominal Flow (lb/h at 100 psi;

near saturation, unless otherwise noted) 1020 1158 303

Maximum Back Pressure

(% of inlet; based on absolute pressure) 99

Minimum Differential Pressure (psi) 7.3

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