SMC Networks VBA40A Bedienungsanleitung

VBA-MM-L004-B

Maintenance Manual

Booster Regulator

VBA40A

−Contents−

1. Foreword････････････････････････････････････P. 1

2. Maintenance of cylinder and body･･････････････

3. Maintenance of governor･･････････････････････

4. Replacement parts list････････････････････････

P. 2

P. 4

P. 5

- 1-

1. Foreword

When the booster regulator is disassembled and reassembled for maintenance, read and follow this

manual.

Maintenance period depends on air quality and operating conditions, but when either of following

situations are seen on the booster regulator, the booster regulator should be considered to come close to its

life end and given maintenance at earlier period.

1. The handle is bleeding all the time.

2. Exhaust sound can be heard at an interval of 10 to 20 sec. without air consumption at the

secondary side.

･Check that air pressure is exhausted from the IN and OUT sides.

･Disconnect piping. The size of tool prepared for disconnection should be suitable

for the type of piping.

･Remove the tank (VBAT20※and 38※) from the booster regulator. For removal,

use a hexagon wrench (nominal size 8).

･The tool prepared for disassembling the booster regulator should as shown in

“Necessary tools” of applicable pages.

･Disassembly in accordance with procedure from page 2 to 4.

･Wipe off stain of sliding face and dust of mesh filter.

･Check the condition of parts, and if any of them has scratch or abrasion, replace it

with new one listed on page 5.

･If the silencer gets clogged at inside, replace it as well.

･Gather replacement parts to one place to prevent the mix-up of them during

reassembly.

･Assembly in accordance with procedure from page 2 to 4.

･In the end, check that there is no part and screw missed for assembly or

tightening.

･Put back the disassembled parts to their original position.

･Supply air, rotate the handle clockwise and set pressure.

･Check for external leakage with soapy water.

･If any abnormal phenomenon is seen, please contact SMC sales branch.

Preparation

Removal

Disassembly

Replacement

Reassembly

Inspection

Start

Mounting

Finish

- 2-

Fig. 1

2. Maintenance of cylinder and body

2.1 Maintenance of cylinder

◆Necessary items◆

Socket wrench, Nominal 19 (2pcs)

Looseness preventive adhesive (Loctite 243, etc.)

◆Disassembly procedure◆

1) Check air pressure is exhausted from the IN and OUT sides.

2) Loosen the hexagon nuts (12) and spring washers (11) with the socket wrench, and remove three tie

rods (10).

3) Take off the side covers (9) at the right and left.

4) Remove the cylinder tubes (6) and (7) at the right and left sides.

5) Loosen the piston nut (13) with the socket wrench and remove the piston (4).

◆Maintenance and check◆

1) Check any part does not have abrasion, deterioration and deformation. If it has, replace it with new one.

2) Wipe off stain from the part whose motion is not smooth, and apply grease.

3) If you move onto maintenance of the body, refer to 2.2 Maintenance of body (P.3).

◆Reassembly◆

1) Apply grease to the part marked with in Fig. 1.

2) Pass the piston rod (3) through the body (1) and assemble the piston (4).

3) Apply one drop of Loctite to the thread of the piston nut (13) and tighten it with the socket wrench.

(Torque 21Nm) The piston is not fixed completely (idles) if it is assembled correctly. Do not

tighten it over necessary torque.

4) Mount the O-rings (2) to the right and left sides of the body and assembly the cylinder tubes (6) and (7).

It should be noted the cylinder tube assembled is different for the right and left sides.

5) Mount the O-rings (8) to the side covers (9) and assemble the side covers to the right and left of the

cylinder tubes (6) and (7).

6) Pass through three tie rods (10) and tighten them with the hexagon nuts (12) and spring washers (11).

(Torque 42Nm)

◆Check◆

1) Check the bolts and nuts are tightened

to adequate torque.

2) Supply air and check pressure setting

can be performed.

3) Check there is no leakage from

connected parts with soapy water.

(1)

(2)

(4)

(5)

(6)

(7)

(8)

(9)

(11) (12)

(13)

(2)

(3)

(4)

(5)

(12) (11)

(8)

(9)

(10)

- 3-

Fig. 2

2.2 Maintenance of body

◆Necessary tools◆

Phillips driver

Pincettes

Turbine oil (Turbine oil 32 class 2, Exxon Mobile or like that)

◆Disassembly◆

1) Remove six cross recessed flat head screws (7) at the right and left sides with the Phillips driver.

2) Take off the side plates (6) at the right and left.

3) Take out the check valves (2), (3) and (11) through (14) from the body (1).

4) Take out the switch valves (4) and (8) though (10) from the body (1).

5) Take out the rod seal (5) from the body (1) with the pincettes.

◆Maintenance and check◆

1) Check any part does not have abrasion, deterioration and deformation. If it has, replace it with new one.

2) The end of IN port has a mesh filter built in. Remove dust from the filter by air blowing.

3) Wipe off stain from the part whose motion is not smooth, and apply grease. Apply one drop of Turbine

oil to the switch valve.

◆Reassembly◆

1) Mount the switch valves (4) and (8) through (10). (It is a precise part and should be handled with care.)

2) Assembly the check valves (2), (3) and (11) through (14) to the one side, mount the side plates (6) and

tighten them with six cross recessed flat head screws (7). (Tightening torque 3Nm) It should be noted

the check valves (2) and (3) have different mounting direction.

3) Assembly the check valves to the other side. At this time, hold down the spring to overcome its reaction

force.

◆Check◆

1) Check there is no gap between the side plates (6) and body (1).

2) Check the springs are mounted in place and the check valves (2) and (3) and switch valve (4) move

smoothly.

(5)

(4)

(8)

(9)

(10)

(11)

(3)

(1)

(7)

(6)

(3)

(6)

(7)

(2) (11)

(11)

(2)

(13)

(12)

(14)

(13) (12)

(11)

※Mesh filter

- 4-

3. Maintenance of governor

◆Necessary tools◆

Phillips driver

Radio pliers

◆Disassembly◆

1) Check air pressure is exhausted from the IN and OUT sides.

2) Rotate the handle counterclockwise back to the end (one direction).

3) Remove four cross recessed round head screws (7) with the Phillips driver.

4) Remove the bonnet assemblies (6) and (8), pressure adjusting screw (5), pressure adjusting spring (4)

and diaphragm assembly (3).

5) Pull out the governor valve seat assembly (2) with the radio pliers.

◆Maintenance and check◆

1) Check any part does not have abrasion, deterioration and deformation. If it has, replace it with new one.

2) Wipe off stain from the part whose motion is not smooth, and apply grease.

◆Reassembly◆

1) Mount the governor valve seat assembly (2) with minding the mounting direction of the body (1).

2) Mount the diaphragm assembly (3), pressure adjusting spring (4) and pressure adjusting screw (5).

3) Put on the bonnet assemblies (6) and (8) and tighten them with four cross recessed round head

screws (7) using the Phillips driver. (Torque: 3Nm)

◆Check◆

1) Check the cross recessed round head screws (7) are

tightened and supply air.

2) The governor starts relieving. Then, rotate the handle

to positive direction until relieving stops.

3) Check pressure setting to necessary pressure can be

performed by handle.

4) Check there is no leakage from connected parts with

soapy water.

※Maintenance of the governor can be

performed without removing the

cylinder part.

Fig. 3

(4)

(6)

(7)

(5)

(1)

(2)

(8)

(3)

- 5-

4. Replacement parts list

The replacement part can be ordered with the following part number.

Each set includes the components shown in the right part of table. Refer to the drawing number and item

number in this manual to check each part.

Component

Part number Description Description Qty.

Dwg. no. Item

no.

Piston seal 2 Fig. 1 (5)

Rod seal 1 Fig. 2 (5)

O-ring (gasket) 2 Fig. 1 (2)

Governor assembly 1 Fig. 3 (2)

Check valve 4 Fig. 2 (2),(3)

Cross recessed flat head screw

(mounting screw) 12 Fig. 2 (7)

KT-VBA40A-1

Booster regulator

maintenance

parts set

Grease package 2 －－

Switch valve assembly 1 Fig. 2 (4)

Exhaust sleeve 2 Fig. 2 (9)

Travel spring 1 Fig. 2 (8)

KT-VBA40A-2 Switch valve set

Push rod guide assembly 2 Fig. 2 (10)

Diaphragm assembly 1 Fig. 3 (3)

KT-VBA40A-3 Governor valve

seat set Governor assembly １Fig. 3 (2)

Piston seal 2 Fig. 1 (5)

Rod seal 1 Fig. 2 (5)

O-ring (large) 2 Fig. 1 (2)

O-ring (small) 2 Fig. 1 (8)

KT-VBA40A-4 Seal set

Grease package 2 －－

Check valve 4 Fig. 2 (2),(3)

Check valve spring 4 Fig. 2 (11)

Plunger 2 Fig. 2 (12)

Plunger guide 2 Fig. 2 (13)

Check valve guide assembly 2 Fig. 2 (14)

KT-VBA40A-5 Check valve set

Grease package 1 －－

Bonnet 1 Fig. 3 (6)

KT-VBA40A-6 Bonnet set Handle 1 Fig. 3 (8)

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