Emerson YARWAY 516 Series Manual
Emerson.com/FinalControl
YARWAY SERIES 515/516* INTEGRAL STRAINER STEAM TRAPS
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
Before installation these instructions must be fully read and understood
© 2018 Emerson. All Rights Reserved. VCIOM-09537-EN 18/09
SERIES NUMBERS
To determine the size, series number, and
pressure/temperature rating, refer to the
nameplate on the trap body.
Suffix Letter Identification
SW Socketweld ends
A, B Internal Part Size
R* Commercial (flanges per ANSI Standard)
E* Navy (flanges per MIL-T-960E)
RATINGS
Operating pressure ranges
SHELL PRESSURE/TEMPERATURE RATINGS
Back Pressure Limits
Piston valve traps rated to 1500 psig (100 bar)
(incl.) are factory set to operate from 150psig
(10 bar) to maximum rated pressure. Maximum
allowable back pressure at trap outlet equals
25% of pressure at trap inlet, based on absolute
pressures.
End Conn. Figure No. Internal Parts Piston End Conn. Rating
1/2", 3/4", 1" 515
516* A or B SW
SW
1500 psig (100 bar) - 875F (468C)
1500 psig (100 bar) - 775F (413C)
Note: Series 515 socketweld end traps are chrome moly steel construction.
*Series 516 socketweld end traps are constructed from carbon steel.
SATURATION CURVE
ALL LIQUID
PHASE
ALL
SUPERHEAT
SERIES 515
SERIES 516
MAX. TEMPERATURE (C)
MAX. TEMPERATURE, BAR
MAX. TEMPERATURE, PSI
MAX. TEMPERATURE (F)
2
YARWAY SERIES 515/516* INTEGRAL STRAINER STEAM TRAPS
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
Equipment drain
Yarway Welbond shut off valve
Dirt leg
(optional)
Steam trap
Strainer blow-down (optional)
½ Yarway Welbond globe valve Test valve (optional)
Yarway Welbond globe valve
Elevated return
Check valve
Return main
FIGURE 1
INSTALLATION
Piping to and from the trap should be equal to
trap size or one size larger. Discharge line for
short runs equal to trap size; larger for long
runs. Avoid configurations that would cause
excessive back pressure.
Blow the System Out before installing the trap.
Frequent strainer blowdown or cleaning is
recommended on a new system. Conditions
will dictate frequency of blowdown in normal
operation.
Valves - Use globe type (Yarway Welbond®) for
isolation strainer blow down, or for test (see
Figure No. 1). Bypasses not recommended
except for critical installations. If discharge
is to a multistation or overhead return, put a
swing check valve in discharge line to prevent
backflooding on shutdown. Select a check valve
suitable for the application.
Locate Trap below outlet from equipment
(gravity flow). If trap must be above the drain
provide a "U" or lift fitting at the bottom of the
riser before the trap (water seal). The trap may
be installed in a horizontal or vertical line or at
any angle so long as the discharge is downward
or horizontal.
Welding - Socket or seal welding of this
trap body to the piping should be completed
according to applicable codes, standards, and
procedures.
DO NOT make electrical welding connections
to the trap body or any other part of the trap
to prevent internal arcing. Electrical ground
should be made to the pipe and not the trap.
Note: It is not necessary to disassemble the
trap prior to welding, but avoid subjecting the
internals to temperatures higher than 500F.
WARNING
Hot discharge from this product may cause severe
burns. Discharge must be piped away or directed
so that persons in the vicinity are not endangered.
This product must be isolated, vented and cool to
the touch before repairing or inspecting.
3
YARWAY SERIES 515/516* INTEGRAL STRAINER STEAM TRAPS
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
MAINTENANCE
1. For the best trap operation and maximum
service life, strainer screen should be
cleaned frequently. This can best be done by
using a blowdown valve connected to blow-
off connection.
2. Periodically remove the bonnet and clean
and inspect the screen. This should be done
at least once a year and more frequently
if the trap is not fitted with a strainer
blowdown valve.
3. When cleaning the strainer it is
recommended that the trap be inspected
and working parts cleaned if necessary. In
the event of condensate drainage problems,
check before opening the trap whether
the trouble is due to a clogged line, valve
broken or in wrong position, or dirty strainer
requiring blowdown.
DISASSEMBLY
1. Remove bonnet and unscrew seat.
2. Inspect and clean all parts. If satisfactory,
reassemble trap. It is recommended that
new gaskets be used.
*Consult factory for non-standard product,
flanges and Series 516.
If Internals Require Replacing
1. Remove cap nuts, cap and using wrench and
screw driver simultaneously, loosen control
cylinder.
2. Pull lock pin, remove lock nut and
unscrew control cylinder.
3. Install new internals, screen and gaskets.
Reassemble trap.
CHECKING
Check bonnet and cap nut torque after 48 hours
of operation. More frequent checks for proper
trap operation can be quickly made by one of
the following methods:
a. Observe the discharge from the trap
through the test connection—first closing
the downstream stop valve.
b. Hold screwdriver or metal rod against base
of cap. Listen for characteristic clicking
sound of valve as it opens and closes.
If trap is remaining open continuously or
not opening at all: —strainer screen may be
damaged or dirty. —parts may be worn from
service. —dirt and scale may be lodged in
internals. Disassemble and inspect the trap.
PARTS LIST
Item Description
1Body
2Bonnet
3Cap
4* Valve
5* Control cylinder
6* Seat
7* Lock nut
8* Lock pin
9* Seal gasket
10* Cap gasket
11* Bonnet gasket
12* Screen
13 Bonnet stud
14 Bonnet nut
15 Cap stud
16 Cap nut
* Renewal kit
FIGURE 2
Piston valve type
4
YARWAY SERIES 515/516* INTEGRAL STRAINER STEAM TRAPS
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
FIGURE 3
Trap disassembled exposing strainer and 'cage'
arrangement of all trap working parts mounted
in the bonnet.
FIGURE 4
Seat removed to show valve and control
cylinder.
SERVICING
After disassembly, clean internal parts with a
cloth and non-corrosive solvent. Heavy deposits
may be cleaned from orifice in top of piston
valve with a piece of fine wire or toothpick.
BE CAREFUL not to damage valve orifice,
disc edge, or control cylinder bore. Under no
circumstances should crocus cloth or tools be
used to clean any surfaces of trap parts.
Inspect control cylinder bore, valve and seat for
wear. Worn parts cause inefficient or improper
operation. They should be replaced with a
factory-set renewal kit.
CAUTION: The valve, seat and control cylinder
or the renewal kit are matched parts. They are
not individually interchangeable with similar
parts from other repair kits. Do not re-use
any of the old parts when installing a new
renewalkit.
Internal part size Renewal kit part no.
A963557-01
B963557-02
TABLE 1 - TORQUE VALUES ft-lbs (Nm)
Item ft-lbs (Nm)
Bonnet nuts 110-130 (149-176)
Cap nuts 14-18 (19-24)
Lock nut 7.9-8.3 (10.7-11.3)
SPARE PARTS
To cover a one year service period, it is
recommended that one (1) renewal kit for every
four (4) integral strainer traps installed of same
internals be stocked. (Minimum number of
kits1) and sufficient gaskets for trap inspection.
REASSEMBLY
Installing Repair Kit
1. Clean sealing surfaces and all internal
parts.
2. Clean studs, and lubricate studs and nut
faces with high temperature lubricant, such
as “Molykote”.
3. Remove lock pin and nut from control
cylinder stem.
4. Lubricate threads. Screw control cylinder
into bonnet.
5. Insert valve in seat, holding valve in position,
lubricate threads screw seat into bonnet—
be sure valve enters control cylinder
and that seat contacts the bottom of the
counterbore in the bonnet.
6. Replace lock nut (bevel up), and fully insert
lock pin.
7. Screw cylinder down; tighten lock nut per
Table 1.
8. Push screen into body recess and with new
bonnet and seat gaskets in place lower
bonnet over studs.
9. Run bonnet nuts on studs and tighten
alternately to the torque indicated in Table1.
10. Replace cap gasket, cap and nuts. Torque
per Table 1. Table 1—Torque Values ft-lbs
(Nm)
5
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.
Yarway is a mark owned by one of the companies in the Emerson Automated Solutions business unit of Emerson Electric Co. Emerson Automation Solutions, Emerson
andthe 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
YARWAY SERIES 515/516* INTEGRAL STRAINER STEAM TRAPS
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
NOTE
Any malfunction of this product must be reported to the service department. Repare 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 prolongued 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.
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