Yarway Model 11 Control Valve, Single Stage- IOM Owner's manual

Brand: Yarway

Model: Model 11 Control Valve, Single Stage- IOM

Type: Owner's manual

YARWAY MODEL 11 CONTROL VALVES - SINGLE STAGE

INSTALLATION AND MAINTENANCE INSTRUCTIONS

UNPACKING

The Yarway water control valves are packed

with the greatest care in wooden boxes or

cartons for protection during handling or transit

to site.

After hydrostatic testing, the water control

valve is flushed through with a high grade of

preservative to protect machined and internal

surfaces from corrosion. If it is found, however,

that damage has occurred during shipment,

then this should be reported immediately to

your forwarder or Yarway representative.

Particular care should be taken when removing

the water control valve from its packing and

your special attention is required to check

that no damage has occurred to flange faces,

threading and butt weld profiles (see figure 1).

INSTALLATION OF A BUTT WELD WATER

CONTROL VALVE

Before installation, check the water control

valve for any visible damage. Make sure that

protective covers are removed and that butt

weld ends are cleaned. Verify with a handheld

flash light that the inlet and outlet connections

are free of any obstructions.

WELDING

The body material is indicated on the water

control valve. Follow an acceptable welding

code such as ASME IX or EN or your local

regulation for welding of the water control

valve. Make sure that the weld is clean, TIG

welding is preferable. The water control valve

should not be disassembled before welding.

INSTALLATION OF A FLANGED WATER

CONTROL VALVE

When the water control valve is fitted with

flanges make sure flanges are clean and that

suitable gaskets are available.

Do not re-use gaskets. In case of doubt,

consultyour local gasket supplier.

The water control valve is designed for clean

and filtered water otherwise a strainer is highly

recommended by Yarway.

Check for the ‘arrow flow direction indicator’ on

the body. Install the water control valve in such

a way that the flow direction is with the arrow.

Make sure that there is sufficient space to

remove the bonnet and actuator for cleaning

and inspection of the water control valve seat.

The water control valve is designed for clean

and filtered water otherwise a strainer is highly

recommended by Yarway.

Before installation these instructions must be fully read and understood

STORAGE PROCEDURE

Upon receipt, check both the water control

valve and the packing case for any transit

damage. Any damage to the water control valve

should be rectified to prevent the ingress of

dust or water, prior to placing the water control

valve into storage.

Check the information contained on the

identification plate/tag plate anddocumentation

and return the water control valve to its packing

withprotective covers in place.

For short term storage, up to 6 months

duration, no additional preservation measures

are necessary. Retain the water control valve

in its original packing in a clean, dry indoor

location. If outdoor storage is unavoidable,

then the packing case should be enclosed in

awaterproofcover.

For long term storage use only a dry indoor

location. Apply a cosmoline type grease to

machined faces. Retain the water control valve

in its original packing and inspect at 3 monthly

intervals to ensure that no deterioration has

occurred.

Before placing the water control valve into

service, inspect all components, seals etc.,

to ensure correct functioning. Follow the

procedure for installation as described before.

YARWAY MODEL 11 CONTROL VALVES - SINGLE STAGE

INSTALLATION AND MAINTENANCE INSTRUCTIONS

MAINTENANCE

The water control valve requires little

maintenance. Make sure that pressure has

been relieved before opening the bonnet.

After removing the tag weld between the

body and seat, use the special tool (figure 2)

or another suitable tool to remove the seat.

The threading is standard right handed (counter

clockwise tounscrew).

Clean the water control valve parts by using

compressed air. As should always be the case,

use safety gloves, eye protection and other

safety equipment during your work.

Clean the gasket facing on both the body, seat

and bonnet. After cleaning, replace the gaskets

with new ones suitable for the pressure and

temperature. In case of doubt consult Yarway.

To assemble the seat use the special assembly

tool in combination with a torque wrench.

Keep pressure down on the torque wrench

when tightening the seat. The tightening torque

for the seat is approx 40 Nm. After assembly,

tag weld the seat to the body. Place bonnet on

the body and tighten the bolts with a torque

wrenchto 30 Nm.

Information for the welder: see WPS number

4N-4178-114.

PACKING SET

1. Completely remove old packing. Make sure

that surfaces contacting packing are clean.

Inspect the stuffing box and stem for

straightness, wear, scratches, pitting and

other abnormalities which would prevent

establishment of a good seal around the

packing. A smooth undamaged surface is

essential a good sealing. Repair or replace

as necessary.

2. Check packing rings for proper fit.

They should be push fit into stuffing box.

3. Install one ring at a time, in the proper

sequence, using a packing driver or gland

bushing. Facing must be seated individually

with a packing driver. Pre-compression

of each ring during installation is very

important for the tightness of the seal.

Do not use screwdriver or other sharp

object to seal the packing. This could

damage the packing and/or stem. If a

packing driver is used, make sure that the

diametrical clearances between the I.D. of

the driver and O.D. of the stem and the O.D.

of the driver and I.D. of the stuffing box do

not exceed 0.5mm (0.020").

4. Stagger the joints (if present) on each

successive ring 180° apart.

5. D

o not over compress the packing.

The amount of compression should be only

that which is required to the install the

correct number of rings into the stuffing box.

Compression of the packing in a partially

filled stuffing box, to make room for the rest

of the packing, can be accomplished using

the spacer and turning the packing gland.

6. When all the packing has been installed in

the stuffing box and the spacer and packing

gland are in place, adjust the compression

setting by turning the gland with a wrench

to seat and form the complete packing set

to the stuffing box and stem. Compress the

packing set enough to cause the packing

slightly grip the stem (if stem movement

is performed by hand, the stem should not

move). If the stem moves with stick slip,

the packing set is over tightened.

7. Secure the gland with the securing bolt in

one of the threaded holes.

8. Re-tightening of the gland is necessary

within a hour after start-up. During

operation it may be necessary to adjust the

gland. Check regularly.

•

NOTES

• Recommended spares

* May vary due to customer requirements

Materials and data of units supplied, may deviated from this Instruction Manual.

Please consult order documents in case of doubt.

The water control valve is classified under European directive 97/23 EC under

article 3, paragraph 3 (SEP).

Bench settings for the actuator:

Open: min.: 3.0 bar

Stroke 20 mm: min.: 4.3 bar

max.: 6.0 bar

FIGURE 1 FIGURE 2 - SPECIAL TOOL FOR DISASSEMBLY

TABLE 1 - STANDARD MATERIALS

Item Name Material ASME Material EN

1 Body A105 P250GH

2• Seat AISI 431 EN 1.4057

3• Seal ring AISI 316L EN 1.4404

4• Packing Graphite/SS Graphite/SS

5 Bonnet A105 P250GH

6• Stem AISI 431 EN 1.4057

7• Packing set Graphite Graphite

9• Packing gland C. steel C. steel

10• Spacer AISI 431 EN 1.4057

11 Yoke plate C. steel C. steel

12 Bolt AISI 316 8.8

13 Actuator* C. steel C. steel

14 Coupling A351 gr. CF8 EN 1.4308

18• Securing bolt AISI 316 A4

19 Washer AISI 316 Steel

20 Lock nut C. steel C. steel

YARWAY MODEL 11 CONTROL VALVES - SINGLE STAGE

INSTALLATION AND MAINTENANCE INSTRUCTIONS

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