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Emerson Yarway Series Manual

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YARWAY SERIES AV-5 AIR VENT
InstallatIon, operatIon and maIntenance InstructIons
Before installation these instructions must be fully read and understood
VCIOM-03127-EN 18/09
SPECIFICATIONS
Pressure-Temperature Rating:
Shell; ASME Class 600 (PN 100) B16.34.
Operating Pressure max.; 600 psig (41 bar).
Operating Temperature max.; 650F (343C).
Test Pressure max.; 800 psig (55 bar)
Nominal Venting Capacity:
1.25 Actual cu ft/min. (0.6 Lit/sec) venting to
atmosphere based on a minimum pressure of
15 psig.
Failure Position:
Vent fails open upon bellows failure.
End Connections:
In-line ½”, ¾” NPT (DN 15, 20) per ASME
B1.20.1.
Installation Position:
Vertical with discharge down.
Special Features:
Integral Screen.
NOTE
All pressures are gauge
APPLICATION
Series AV-5 vent has been designed to remove
air and non-condensables from steam lines.
Emerson.com/FinalControl © 2017 Emerson. All Rights Reserved.
OPERATION
The vent operates by means of a thermostatic
bellows which opens and closes an interval
valve in response to temperature changes.
Steam is prevented from discharging through
the vent, and only subcooled non-condensables
are discharged.
MAINTENANCE
AV-5 vent is permanently assembled; no
maintenance other than flushing or removing
material from the screen is recommended.
TROUBLESHOOTING
AV-5 vent is permanently assembled;
no maintenance other than flushing or removing
material from the screen is recommended.
Air vent to pass subcooled gases:
a. Check integral strainer for clogging.
Rush or remove material clogging strainer
Air vent blows live steam:
a. Dirt on valve seating area.
b. Worn valve seat. Replace the air vent.
c. Failed bellows. Replace the air vent.
WARNING
Hot discharge from this product may cause severe
burns. Discharge must be piped away or directed
sothat persons in the vicinity are not endangered.
This product must be isolated, vented and cool to
the touch before repairing or inspecting.
Conduct
discharge to
safe location
Acceptable alternative
vent may cycle on
some condensate
Preferred installation
generally more sensitive
to presence of air
AV-5
2
YARWAY SERIES AV-5 AIR VENT
InstallatIon, operatIon and maIntenance InstructIons
NOTE
Any malfunction of this product must be reported to the service department. Repair made to the product by
unauthorized personnel will void the warranty.
RIGHT TO KNOW LAWS AND OSHA STANDARD 29CFR (1910.1200)
Material Safety Data Sheets on the following Yarway products:
Valves, Steam Traps and Strainers
The OSHA Hazard Communication Standard 29CFR 1910.1200, states that the standard does not
apply to “articles.” The standard defines an article as:
“A manufactured item formed to a specific shape or design for a particular use which does not
release or otherwise expose an employee to a hazardous chemical under normal conditions of
use.”
The above named products fall within the definition of an “article”, no Material Safety Data Sheets
are available or are required. Our product is manufactured as an “end product.”
If the product is a weld end the following applies:
WARNING
Materials used in manufacture of Yarway products are considered in a stable condition when shipped.
However, under certain conditions purchasers could create potential hazardous conditions by their
future operations.
CAUTION
Welding, cutting, burning, machining or grinding of this product can generate toxic dust and fumes of
potentially hazardous ingredients. The dust or fumes can cause irritation of the respiratory tract, nose,
throat, skin and eyes. It may cause temporary or permanent respiratory disease in a small percentage
of exposed individuals. Use moderate ventilation when grinding or welding. Avoid breathing dust, fumes
or mist. Avoid prolonged skin contact with dust or mist. Maintain dust levels below OSHA and ACGIH
levels. Use protective devices. Wash hands thoroughly after contact with dust before eating or smoking.
Neither Emerson, Emerson Automation Solutions, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance of any product.
Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.
Emerson Automation Solutions, Emerson and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their
respective 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.com/FinalControl