Emerson YARWAY 516 Series, YARWAY 515 Series Installation, Operation And Maintenance Instructions

YARWAY SERIES 515/516* INTEGRAL STRAINER STEAM TRAPS

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

Before installation these instructions must be fully read and understood

RATINGS

Operating pressure ranges

MAX. TEMPERATURE (C)

SATURATION CURVE

ALL LIQUID

PHASE

SERIES 515

ALL

SUPERHEAT

MAX. TEMPERATURE, PSI

SERIES 516

MAX. TEMPERATURE, BAR

MAX. TEMPERATURE (F)

SHELL PRESSURE/TEMPERATURE RATINGS

Back Pressure Limits

SERIES NUMBERS

Piston valve traps rated to 1500 psig (100 bar)
(incl.) are factory set to operate from 150psig
(10 bar) to maximum rated pressure. Maximum
allowable back pressure at trap outlet equals

To determine the size, series number, and
pressure/temperature rating, refer to the

nameplate on the trap body.
25% of pressure at trap inlet, based on absolute
pressures.

Suffix Letter Identification

SW Socketweld ends

A, B Internal Part Size

R* Commercial (flanges per ANSI Standard)

E* Navy (flanges per MIL-T-960E)

End Conn. Figure No. Internal Parts Piston End Conn. Rating

1/2", 3/4", 1"

Note: Series 515 socketweld end traps are chrome moly steel construction.
*Series 516 socketweld end traps are constructed from carbon steel.

515

516*

A or B

SW
SW

1500 psig (100 bar) - 875F (468C)
1500 psig (100 bar) - 775F (413C)

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YARWAY SERIES 515/516* INTEGRAL STRAINER STEAM TRAPS

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

FIGURE 1

Equipment drain

Yarway Welbond shut off valve

Steam trap

Dirt leg
(optional)

Strainer blow-down (optional)
½ Yarway Welbond globe valve

Test valve (optional)
Yarway Welbond globe valve

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.

Elevated return

Check valve

Return main

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.

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.

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.

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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 blow­off 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.

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

1 Body
2 Bonnet
3 Cap
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

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.

FIGURE 2
Piston valve type

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YARWAY SERIES 515/516* INTEGRAL STRAINER STEAM TRAPS

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

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
renewalkit.

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
kits1) and sufficient gaskets for trap inspection.

Internal part size Renewal kit part no.

A 963557-01
B 963557-02

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 Table1.

10. Replace cap gasket, cap and nuts. Torque
per Table 1. Table 1—Torque Values ft-lbs
(Nm)

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)

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.

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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.

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
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.

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