Yarway Series 711, 731, 746 and 751-F2 Unibody Plus Steam Traps Owner's manual

Brand: Yarway

Model: Series 711, 731, 746 and 751-F2 Unibody Plus Steam Traps

Type: Owner's manual

YARWAY SERIES 711-F2, 731-F2, 746-F2 AND 751-F2 UNIBODY PLUS STEAM TRAPS

INSTRUCTION, OPERATION AND MAINTENANCE MANUAL

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

GENERAL

The UniBody Plus line of steam traps has

minimized the timeconsuming chore of trap

maintenance by packaging four different types

of traps (disc, piston, orifice, filled thermal

element-FTE) in interchangeable capsules. By

using Yarway’s 701-F2 UniBody Plus Adapter,

existing installations of 'All Position' type traps

can be easily upgraded to the UniBody Plus line

of trap capsules.

The existing 'All Position' connector is left

inline, and the 701-F2 UniBody Plus Adapter

is bolted to it, permanently. Standard Yarway

capsules are then installed in the 701-F2

UniBody Plus Adapter. The 701-F2 series traps

are designed to retrofit the following traps:

751/761 FTE Capsule

751 FTE Trap

711 Disc Trap

721UC-F2 Disc Trap 731/741 Piston Capsule

WARNING

UniBody capsules are designed to ANSI Class 600;

however, the mating 'All position' connector may

be limited to lower pressure and/or temperature.

Trap operating conditions must not exceed the

rating of the lowest rated component.

Manufacturer Model

Armstrong 2010 with 360° universal connector

2011 with 360° universal connector

Spirax Sarco UTD30L with swivel connector

UTD52L with swivel connector

UBP30 with swivel connector

To renew the trap merely remove the capsule

from the adapter body, and install a new

capsule of the same type or a different type

if the requirements of the application have

changed. Trap renewal does not require

removal of the two flange bolts.

731 Piston Trap

YARWAY SERIES 711-F2, 731-F2, 746-F2 AND 751-F2 UNIBODY PLUS STEAM TRAPS

INSTRUCTION, OPERATION AND MAINTENANCE MANUAL

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 beforerepairing or inspecting.

HOW THEY WORK

711 Thermodynamic disc type

Condensate pressure at the seat inlet opens

the valve disc. Heat and kinetic energy in

flashing hot condensate close the valve disc.

Normal discharge is cyclic. The trap closes

near steam temperature.

731 Thermodynamic piston type

This trap uses the heat energy in hot

condensate to create pressure above the piston

valve, which, when combined with choked flow

in the control orifice, acts to close the valve.

Cool liquid does not provide sufficient pressure

above the piston valve, and the valve opens due

to trap inlet pressure. Normal discharge is

cyclic with continuous drainage on heavy loads.

On light loads, discharge may be continuous

through the small control orifice. The trap

closes near steam temperature.

746 Thermodynamic orifice trap

This trap uses the heat energy in hot

condensate to produce flashing and choking

in the orifice throat. The use of two orifices.

Discharge is continuous and near steam

temperature id sized properly.

751 Thermostatic filled thermal element

The difference between condensate at steam

temperature and subcooled condensate causes

the filled thermal element to stroke. Normal

discharge is cyclic, but under extremely low

loads and or low pressure, discharge may

be constant. The trap closes below steam

temperature.

Specification

Series

711-F2 731-F2 751-F2

711 711-HC 711-HP

Operating principle Thermodynamic Thermodynamic Thermostatic

Type Disc Piston Filled thermal element

Design class, ANSI1 600

[1]

600

[1]

600

[1]

Operating pressure (psig) 4 to 450 4 to 450 150 to 600 L 20 to 300

H 40 to 600

-5 1 to 300

-40 1 to 300

-HP 1 to 600

Design temperature (°F) 750 L 450

H 750

-5 440

-40 440

-HP 750

Flow, nominal (lbs·hr at 100 psi)

near saturation unless otherwise

noted

350 600 250 at 150 psi A 600

B 1000

C 1800

E 2200

-5 450

-40 450 at 45°F

subcooled

-HP 450

Maximum back pressure (% of inlet)

based on absolute pressure

80% L 40%

H 25%

55% with split washer removed

[2]

N/A

Minimum differential pressure (psi) 4

NOTES

1. UniBody Plus capsules are designed to ANSI Class 600; however, the mating 'All Position' connector may be

limited to lower pressure and/or temperature. Trap operating conditions must not exceed the rating of the

lowest rated component.

2. For operation from 10 to 20 psig (1.7 to 2.4 bar); or back pressures up to 55% of inlet pressure:

First cool trap. Remove cap nut. Turn threaded stem and lock nut counterclockwise. Use pliers to remove

split washer. Turn stem and lock nut clockwise until lock nut (without split washer) seats tightly, without

jamming on top of bonnet. Lubricate thread. Replace gasket and cap nut. Trap is ready for operation.

⅜ - 16UNC

ø2" B.C.

YARWAY SERIES 711-F2, 731-F2, 746-F2 AND 751-F2 UNIBODY PLUS STEAM TRAPS

INSTRUCTION, OPERATION AND MAINTENANCE MANUAL

INSTALLATION

The 701-F2 UniBody Plus Adapter is bolted to an existing 'All Position' connector to create a

permanent UniBody Plus compatible trap installation. Trap renewal does not require removal

of the 701-F2 UniBody Plus Adapter, or removal of the bolts.

FIGURE 1

Typical assembly of a Yarway 711-F2 UniBody

Plus Adapter to a '360° universal connector'

2 plcs.

Existing

components

Factory assemled

components of the

701-F2 series traps

As assemled

Min. to

disassemle

TRAP INSTALLATION AND POSITION GUIDELINES

Capsule position

Series

711-F2 711-F2 711-F2 711-F2

Horizontal line

Capsule on top

Capsule on side

Yes

Vertical line

Trap discharge down Yes Yes Yes Yes

DIMENSIONS

Trap series A (in.) B (in.)

711-F2 Disc 2¾ 3½

731-F2 Piston 5

16 5

746-F2 Orifice 2

16 3

751-F2 FTE 3

16 3

MATERIALS

Item Material

701-F2 Adapter ASTM A479 304 S/S

Spiral wound gaskets (qty 2) 304 S/S with Grafoil

Trap capsule ass’y Stainless steel

Bolts (if supplied) ASTM A193 B7

YARWAY SERIES 711-F2, 731-F2, 746-F2 AND 751-F2 UNIBODY PLUS STEAM TRAPS

INSTRUCTION, OPERATION AND MAINTENANCE MANUAL

Installation of the 701-F2 UniBody Plus

adapter

Follow these steps to ensure proper trap

operation:

1. Make certain all isolation and stop valves

are closed.

2. SLOWLY open the strainer blow down and

test tee valves to relieve pressure.

3. Do not disassemble a hot trap. Allow time

for it to cool, or pour cool water on it prior

to any work.

4. Clean all gasket seating surfaces. Take

care not to scratch gasket surfaces.

5. Verify that both the inner and outer gaskets

are in place on the 701-F2 UniBody Plus

Adapter.

6. Assemble the 701-F2 UniBody Plus Adapter

to the 'All Position' connector. Take care to

align the body’s flow arrow correctly. Torque

the two (2) bolts to 35-50 ft·lbs making sure

to tighten the bolts evenly.

CAPSULE REPLACEMENT

Disassembly

1. Make certain all isolation and stop valves

are closed.

2. SLOWLY open the strainer blow down and

test tee valves to relieve pressure.

3. Do not disassemble a hot trap. Allow time

for it to cool, or pour cool water on it prior

toany work.

4. Use a wrench to loosen the capsule.

Cleaning

1. Remove the capsule from the 701-F2

UniBody Plus adapter. Internals can be

removed from the bonnet for inspection

and cleaning. DO NOT MIX INTERNALS.

2. Wipe the parts clean with a soft rag. Soak

the parts in mineral spirits to assist in

the cleaning. DO NOT USE ABRASIVE

MATERIALS.

Reassembly

1. Clean all gasket surfaces in the 701-F2

UniBody Plus adapter. When the trap

capsule has been removed for inspection

or cleaning, remove the gasket from the

capsule seat, and wipe the seating surfaces

to remove dirt.

2. Install new gaskets. Replace the gasket with

a new unit (P/N 109045.) Peel the adhesive

backing paper from the new gasket and

insert into the capsule seat with the

adhesive side toward the seat. A new gasket

is supplied with each renewal capsule.

Do not reuse gaskets.

3. Lubricate threads with flurosilicone

lubricant or equal. New capsules are

lubricated at the factory.

4. Tighten the capsule to the recommended

torque as shown in the table below.

ASSEMBLY TORQUES, ft·lbs (Nm)

Parts

Series

711-F2 731-F2 746-F2 751-F2

Trap bonnet 65-75 (88-102)

Piston capsule lock nut N/A 7.9-8.3 (10.7-11.3) N/A N/A

Piston capsule cap nut N/A 25-30 (33.9-40.7) N/A N/A

HOW TO ORDER

701-F2 UniBody plus steam traps

These traps are available in disc, piston, orifice,

and filled thermal element-FTE technologies.

The assembly includes the UniBody Plus trap

capsule, the 701-F2 adapter, and the two spiral

wound gaskets. To order specify quantity and

series of trap. Refer to Yarway data sheets for

trap sizing information.

Example: Qty 2, 701-F2 Gasket Kits P/N 971493

Trap renewal capsule

The trap renewal capsule is prepackaged

and consists of all internal parts, bonnet and

gaskets. The capsule is prelubricated. One

renewal capsule for each ten installed traps of

that type should be stocked. To order specify

quantity and trap series.

Example: Qty 3, 711 trap tenewal

Capsules gasket kit

A 701-F2 gasket kit is available. This kit

consists of both the inner and outer spiral

wound gaskets.

Example: Qty 2, 701-F2 Gasket kits P/N 971493

YARWAY SERIES 711-F2, 731-F2, 746-F2 AND 751-F2 UNIBODY PLUS STEAM TRAPS

INSTRUCTION, OPERATION AND MAINTENANCE MANUAL

Type of trap

Symptoms

Open or continuous discharge Closed or backing condensate

Any type of trap Excessive valve seat wear

[1]

Temperature control valve throttled, insufficient steam pressure

[4]

Dirt on trap seat

[1, 2, 5]

Overloaded trap backing up cold condensate

[4]

Bypass constantly blowing

[3]

Clogged strainer

[5]

Overloaded trap discharging continuously

[4]

Closed stop valve upstream

[6]

Closed return line stop valve or check valve

[6]

Disc 711/721 Worn seat, disc or bonnet

[1]

Installed backward

[7]

Leaking internal seals/gaskets

[1]

Air bound

[4]

Excessive back pressure

[4, 6]

See above - Any type of trap

Impulse control flow

731/741

Worn internals

[1]

Excessive wear in control cylinder

[1]

Excessive back pressure

[4, 6]

Excessive dirt in control orifice

[1, 2]

Improper adjustment or setting

[1, 4, 6]

See above - Any type of trap

Condensate load too small

[4]

See above - Any type of trap

Orifice-746 Trap condensate load too small for orifice size

[4]

Condensate load too large for orifice

[4]

Dirt plugging orifice or screen

[2, 5]

Thermostatic 751/761 Failure of filled thermal

[1, 4]

Valve plugged with dirt

[1, 2, 5]

Element

Excessive back pressure - trap draining continuously

[4, 6]

Excessive back pressure

[4]

Worn valve or seat

[1]

See above - Any type of trap

Leaking gaskets

[1]

See above - Any type of trap

NOTES

1. Replace capsule and gaskets. Clean gaskets surfaces.

2. Clean, remove dirt, install Yarway Strainer if trap does not have integral strainer.

3. Close, repair bypasses.

4. Review trap selection and sizing criteria.

5. Clean screen, blow down strainer.

6. Open or repair stop valves or check valves.

7. Install per manufacturers recommendations.

Also, see Yarway publication 231, 'Simple techniques for surveying steam traps'.

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 Automation 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.

Emerson.com/FinalControl

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 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.

YARWAY SERIES 711-F2, 731-F2, 746-F2 AND 751-F2 UNIBODY PLUS STEAM TRAPS

INSTRUCTION, OPERATION AND MAINTENANCE MANUAL

Yarway Series 711, 731, 746 and 751-F2 Unibody Plus Steam Traps Owner's manual

Yarway Series 711, 731, 746 and 751-F2 Unibody Plus Steam Traps Owner's manual

Yarway Series 711, 731, 746 and 751-F2 Unibody Plus Steam Traps Owner's manual

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