TAC YBA-622-2, YBA-622-2-0-25, YBA-635 User Guide

Page 1

Application

The YBA-622-2 and YBA- 622-2-0-25 valve packing cartridge kits and the YBA-635 valve packing parts kit are used for repair and replacement of the valve packing on current VB-121, -324, and -7xxx valves and discontinued VB-111, -131, -151, -314, -334, -354, and

-9xxx valve models.

YBA-622-2

YBA-622-2-0-25

YBA-635

1/2" to 2" Valve Packing Kits

Installation Instructions

YBA-622-2 Valve Packing Cartridge Kit

Model Chart

Table-1 Available Models.

Part Number Components Contained in Kit

Valve Cartridge, Packin g Assembly f or:

YBA-622-2

YBA-622-2-0-25

YBA-635

The YBA-622-2 was not designed to be used to repair VB-131, VB-151, 1/2" VB-922x, -9263, or -9283 valves, or 1-1/2" to 2" VB-9xxx valves. Packing-only replacement for these valves requires the YBA-635. For packing and valve stem and plug replacement, use the appropriate RYB-9xx-x valve repair kit. See TAC Maintenance Parts, F-26033.

YBA-622-2-0-25 includes (25) YBA-622-2 packing cartridges and (1) TOOL-20-1 wrench.

Current 1/2" to 2" VB-7xxx Discontinued 1/2" to 1-1/4" VB-9xxx

VB-111, VB-121, VB-314, VB-334, VB-354 series Valves

Packing A ssem bly a nd Pac king Grea se for the following discontinued valves:

5/8" O.D. VB- 13 1 se ries i n vert ed flar e 1/2" to 1 -1/4" VB-151 seri es screw ed 1/2" VB-922x, VB-9263, VB-9283

serie s sc r e w ed

1-1/2" and 2" VB- 9xxx valves series

screwed

YBA-635 Valve Packi n g Parts Kit

Applicable Literature

• TAC Maintenance Parts, F-26033

• EN-205 Water Systems Guidelines Engineering

Information, F-26080

Page 2

INSTALLATION Inspection Inspect the pack age for damage. If damaged, notify the appropriate carrier immediat ely. If

undamaged, open the package and inspect the device for obvious damage. Return damaged products.

Requirements • Job wiring diagrams

• Tools:

– Appropriate screwdrivers and wrenches (not provided) – TOOL-20-1, Packing wre nch

• Traini ng: In staller must be a qualifi ed technician

Complete Packing and Cartridge Replacement Installation Using YBA-622-2

Warning:

Before the pac king nu t is r emoved , isol ate t he v alve bod y using shut off v alves ( if provided in the pipi ng system) or depressurize system to zero ( 0 psi) gauge at the valve body. Drain f luid from the i solated or dep ressurized part of the system. If the packing nut is loosened or removed while there is water or steam pressure inside the valve and piping, the valve packing may blow out with potential of bodily injury and/or water or steam damage.

Caution:

• Do not use the YBA-622-2 to r epair 1/2" VB-131, VB-151, VB-92 2x, -9263, or -9283

valves. Packing-only repair for these valves requires the YBA-635. Alternatively, the appropriat e RYB valve repair kit may be used t o replace bo th the stem and plug and the packing. Refer to TAC Maintenance Parts, F-26033 for valve repai r kits.

• Do not exceed the ratings of the device(s).

• Do not apply fluid pressure to the system unless all valve and/or the valve assemblies

have been installed.

• Control valve operation should be stable and not hunt at any ti m e. Excessive stroking

of the valve stem due to improper system setup can resul t in premature wear.

Packing Top

Valve Stem (1/4" dia.)

YBA-622-2 Packing Cartridge

Actuator Mounting Nut (included with valve body)

Washer (stainless steel)

Top Bearing (black)

YBA-622-2 Packing Cartridge

Actuator Mounting Nut (included with valve body)

Valve Body

Figure-1 Installat ion of YBA-622-2 Comple te Packi ng Cartri dge int o 1/2" t o 2" VB- 7xxx and

1/2" to 1-1/4" Obsolete VB-9xxx Valves.

Note:

If valve stem is worn or sc ratche d, repl ace the ste m and plug as sembly in additi on to

the valve packi ng cart ridge. Consult F-26 033 for the appropriat e valv e repair kit.

1. Once system is depressurized, remove and discard existing cartridge. Retain actuator mounting nut.

2. Slide actuator mounting nut onto new cartridge with threaded portion facing upwards.

Page 3

Note:

• YBA-622-2 can be distinguished from earl ier versions by it s stai nless steel backup

washer and black top bearing (refer to Figure-1 ).

• Obsolete YBA- 622 has a brass thin washer (refer to Figure-2) and white top bear ing.

• Obsolete YBA- 622-1 has a stainless steel thin washer and white top bearing.

Note:

Packing top (see Figure-1) must be threaded only one turn into cartridge before sliding over valve stem

3. Apply Teflon pipe sealant (Loctite #592-41 or equivalent) to the bottom threads of the new cartridg e. Instal l YBA-62 2-2 o ver val ve stem and t ight en into valve bo dy, torque t o 40 ft-lb (54 Nm).

4. Tighten down packi ng top securely using TOOL-20-1.

Caution:

TOOL-20 cannot be used on YBA-622-1 or YBA-622-2. Attempting to use TOOL-20 may cause damage to the packing assembl y. TOOL-20-1 with slott ed end must be used. TOOL-20-1 can also be used on earlier versions.

YBA-622 Valve Packing Parts Replacement Using YBA-635

Note:

Do not attempt to repack YBA-622 -1 or YBA-622-2. YBA-635 cannot be used with YBA-622-1 or YBA-622-2. I f the existing YBA-622-2 or obsolet e YBA-622-1 is unusable, the entire packing must be replaced. Refer to the Complete Packing and Cartridge Replacement Installation section.

Valve Stem 1/4" Dia.

Packing Gland

Cone Packing*

Actuator Mounting Nut

Thick Washer*

(Existing)

Cartridge (Existing)

Valve Body

* Included in YBA-635 or Valve Repair Kit

VB-131, VB-151, 1/2" to 1-1/4" VB-9xxx

1/2" VB-922x, VB-9263, VB-9283

Thin Washer (Brass)*

"O" Ring*

Wiper Bearing*

Packing Spring*

Bearing*

Wiper Bearing

Bracket Nut

Packing Gland

"O" Ring*

Asembly*

Valve Body

orBonnet

* Included in YBA-635 or Valve Repair Kit

Valve Stem 1/4" Dia.

Thin Washer (Brass)*

Cone Packing

Packing Spring*

Old Style 1-1/2" and 2" VB-9xxx

configuration manufactured prior to 1/94)

Disc*

Thick Washer*

Bearing*

(with bonnet

Figure-2 Installat ion of YBA-635 Packing Parts Kit ont o Discontinued Valves

Note:

If valve stem is worn or sc ratche d, repl ace the ste m and plug as sembly in additi on to the valve packi ng cart ridge. Consult F-26 033 for the appropriat e valv e repair kit.

1. Remove existing packing gland with TOOL-20-1. Make sure that the retaining ring is brass and not stainless steel. Salvage existing packing gland (see Figure-2 )

2. Remove and discard old pac king parts.

3. Clean valve stem, salvaged packing gland, and inside of cartridge.

4. Apply coating of silicone grease from grease packet to the valve stem, salvaged packing gland, and inside cartridge.

5. If applicable , slide act uator mounting nut (see Figure- 2 ) onto valve body with thr eaded section point ing upwards. Instal l new packing per above figure.

6. Apply Teflon pipe sealant (Loctite #592-41 or equivalent) to the bottom threads of the packing gland. Install and tighten packing gland with TOOL-20-1.

Caution:

F-17324-10 Copy right 2008 TAC All Right s Reserve d. 3

Do not overtighten the packing gland.

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MAINTENANCE

Durability of valve stems and packing is dependent on maintaining non-damaging water conditions . Inadequate water treatm ent or filtration can result in corrosion, scaling, or abrasive particle formation. Scale and corrosion products can migrate from pipe walls to control valves resultin g in stem and packing scr atches, which can adversely affect packing life an d other parts of the hydronic system. This condition can be avoided by the use of proper cleaning, treatment chemicals and storage procedures.

To maintain non- dam aging conditions, the system should be cleaned prior to start up. Filtr ati on equipment shoul d be used where neede d and a regu larl y schedul ed prog ram of water condi tion monitoring and /or treatment should be maintained.

Follow the advice of a qual ified water treatment and control specialist. For additional detailed informa ti on ref er to EN-205, Water System Guidelines Engineering

Information, F-26080.

F-17324-10

TAC

1354 Clifford Avenue P.O. Box 2940 Loves Park, IL 61132-2940

www.tac.com