Emerson.com/FinalControl © 2019 emerson. All rights reserved. VCIOM-10112-EN 19/01
YARWAY F883 FLOAT AND THERMOSTATIC STEAM TRAPS
INSTALLATION AND MAINTENANCE INSTRUCTIONS
GENERAL
These instructions must be carefully read
before any work involving Yarway products is
undertaken.
The installation procedure is a critical stage
in the life of a steam trap and care should
be taken to avoid damage to the trap or
equipment.
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
hightemperature.
Before starting maintenance, be sure that the
equipment is not pressurized or hot.
The equipment must be used within their
pressure and temperature limits, otherwise they
may fail (refer to nameplate or documentation).
Do not remove the nameplate attached to the
equipment. Serial number and other useful
information is stamped on it.
INSTALLATION
ATTENTION
Before installation, remove plastic covers placed
on flanges or connection ends. The equipment has
an arrow or Inlet/Outlet designations. Be sure that
it is installed in the appropriate direction.
Install the steam trap at the point of the system
where the condensate tends to collect. It must
be installed with the float lever in the horizontal
plane, so that it rises and falls vertically. A
strainer should be installed upstream of the trap.
CE Marking
This product has been designed for use
on water and steam which are in Group2
of the European Pressure Equipment
Directive 97/23/EC and it complies with those
requirements. Products in Category 1 or above,
carry the CE mark.
Installation Area Requirements
The installation area should have easy access
and provide enough space for maintenance and
removal operations.
The installation area should have the systems
required to prevent damage of the equipment
due to over temperature/pressure caused by
fire.
PED GROUP 2 GASES CATEGORY
Model Sizes Category
538 37.1 223 15.4 212 100
483 33.3 200 13.8 392 200
441 30.4 175 12.1 482 250
400 27.6 148 10.2 572 300
Maximum Operating Pressure (PMO): 464 psi (32 bar)
Maximum Operating Temperature (TMO): 482°F (250°C)
* According to EN1092-1:2007; ** According to EN1759-1:2004
Body limiting conditions PN40 or below, depending on the type of connection adopted. Rating PN40 for
thread, SW and BW.
F883 All SEP
F883HC 1" (DN 25) 1
F883-65 65 4.5
F883-145 145 10
F883-203 203 14
F883-305 305 21
BODY LIMITING CONDITIONS
Flanged PN40 / ANSI 300*
Allowable Pressure
Flanged ANSI 150**
Allowable Pressure
Related Temperature
psi bar psi bar °F °C
Before installation, these instructions must be carefully read and understood
MAXIMUM DIFFERENTIAL PRESSURE
Model
Maximum Differential Pressure
psi bar