VAT 75232-CE44 Series Istruzioni per il montaggio

Installation, Operating & Maintenance Instructions

Series 75.2, DN 40 (I.D. 1 ½”)

VAT Vakuumventile AG, CH-9469 Haag, Switzerland

Tel ++41 81 771 61 61 Fax ++41 81 771 48 30 Email reception@vat.ch www.vatvalve.com 207088EB

2005-04-28 1/12

Fast closing valve

with pneumatic actuator

This manual is valid for the valve ordering number(s):

75232-CE44- . . . .

75232-UE44- . . . .

75234-KE44- . . . .

The fabrication number is indicated on each product as per the label

below (or similar):

made in Switzerland

Fabrication No.: patented

. .

752

...

–

. ...

–

. .../....

–

......

Fabrication number

Explanation of symbols:

Read declaration carefully before you start any other

action! Keep body parts and objects away from the valve

opening!

Attention! Hot surfaces; do not touch!

Product is in conformity with EC guidelines! Loaded springs and/or air cushions are potential

hazards!

Disconnect electrical power and compressed air

lines. Do not touch parts under voltage! Wear gloves!

Read these «Installation, Operating & Maintenance Instructions» and the enclosed «General

Safety Instructions» carefully before you start any other action!

Installation, Operating & Maintenance Instructions

Series 75.2, DN 40 (I.D. 1 ½”)

VAT Vakuumventile AG, CH-9469 Haag, Switzerland

Tel ++41 81 771 61 61 Fax ++41 81 771 48 30 Email [email protected] www.vatvalve.com 207088EB

2005-04-28 2/12

Contents:

1Use of product .......................................................................................................................................................... 3

1.1 Technical data.................................................................................................................................................... 3

2Installation................................................................................................................................................................. 4

2.1 Unpacking.......................................................................................................................................................... 4

2.2 Installation into the system................................................................................................................................. 4

2.2.1 Admissible forces..................................................................................................................................... 4

2.3 Connections....................................................................................................................................................... 5

2.3.1 Compressed air connection..................................................................................................................... 5

2.3.2 Electrical connection................................................................................................................................ 6

3Operation.................................................................................................................................................................. 7

3.1 Normal operation................................................................................................................................................ 7

3.2 Operation under increased temperature............................................................................................................ 8

3.2.1 Disassembling of the trigger unit for bake out.......................................................................................... 8

3.3 Behavior in case of compressed air pressure drop............................................................................................ 8

3.4 Behavior in case of power failure....................................................................................................................... 8

4Trouble shooting....................................................................................................................................................... 9

5Maintenance & repairs.............................................................................................................................................. 9

5.1 Replacement of actuator/gate assembly.......................................................................................................... 10

6Drawing................................................................................................................................................................... 11

7Spare parts............................................................................................................................................................. 12

8Warranty................................................................................................................................................................. 12

Installation, Operating & Maintenance Instructions

Series 75.2, DN 40 (I.D. 1 ½”)

VAT Vakuumventile AG, CH-9469 Haag, Switzerland

Tel ++41 81 771 61 61 Fax ++41 81 771 48 30 Email [email protected] www.vatvalve.com 207088EB

2005-04-28 3/12

1 Use of product

Use product for clean and dry indoor vacuum applications under the conditions indicated in chapter «Technical data» only!

Other applications are only allowed with the written permission of VAT.

1.1 Technical data

Leak rate

- Body <5 .10-10 mbar ls-1

- Seat <1 .10-9 mbar ls-1

Molecular flow conductance 160 ls-1

Pressure range 1 .10-10 mbar to 1,2 bar (abs)

Differential pressure on the gate 1,2 bar in either direction

Max. differential pressure at opening 30 mbar (1 bar with reduced cycle life)

Cycles until first service 2000 under clean operating conditions

Bake-out temperature

- Valve 200°C (Trigger unit dismantled)

- Actuator 50°C

Temperature difference seat/gate <40°C

Heating and cooling rate <80°C h-1

Material

- Body 1.4301, AISI 304

- Mechanism 1.4310, AISI 301

- Bellows AM350, AISI 636

Seal

- Bonnet metal

- Gate Viton

Mounting position any

Electrical connection 12-pole plug

Position indicator: contact rating 5A/250 V AC, 3A/50 V DC

Compressed air connection R 1/8“ (1/8“ NPT for USA)

Compressed air pressure (overpressure) 4 – 5 bar / 60 – 70 psig

Volume of air cylinder 0.2 l / .007 ft3

Installation, Operating & Maintenance Instructions

Series 75.2, DN 40 (I.D. 1 ½”)

VAT Vakuumventile AG, CH-9469 Haag, Switzerland

Tel ++41 81 771 61 61 Fax ++41 81 771 48 30 Email [email protected] www.vatvalve.com 207088EB

2005-04-28 4/12

Solenoid (opening)

- Supply voltage 24V DC

- Power required 2.5 W

Closing time <10 ms

Opening time 7 s

Weight 2 kg / 4.5 lbs

2 Installation

2.1 Unpacking

Be careful during opening the boxes and nylon bag, do not contaminate the valve.

Pay attention that valve and flanges are not damaged when the valve is lifted out of the box and

handled afterwards.

2.2 Installation into the system

Tighten mounting screws of the flanges uniformly in crosswise order. Observe the maximum torque of

9 Nm / 6.5 lbf .ft for CF flanges.

2.2.1 Admissible forces

Forces from evacuating the system, from the weight of other components,

and from baking can lead to deformation of the valve body and to malfunction

of the valve. The stress has to be relieved by suitable means, e.g. bellows

sections. The following forces are admissible:

Axial tensile or compressive force «FA»:500 N / 112 lbf

Bending moment «M»: 30 Nm / 22 lbf .ft

If a combination of both forces («FA» and «M») occurs, the values mentioned

above are invalid. Please contact VAT for more information.

Installation, Operating & Maintenance Instructions

Series 75.2, DN 40 (I.D. 1 ½”)

VAT Vakuumventile AG, CH-9469 Haag, Switzerland

Tel ++41 81 771 61 61 Fax ++41 81 771 48 30 Email [email protected] www.vatvalve.com 207088EB

2005-04-28 5/12

2.3 Connections

2.3.1 Compressed air connection

Connect compressed air only if

- valve has been installed into the vacuum system

- moving parts cannot be touched

Connect compressed air to p (internal thread R 1/8“, 1/8“ NPT for USA)

Compressed air pressure (min. - max. overpressure): 4.5 - 7 bar / 65 - 100 psi

Use only clean, dry or slightly lubricated air!

Commercially available water separators and filters have to be installed.

Compressed air pressure: See „Technical data“ and label attached to valve.

The air lines have to be flushed or even cleaned before they are connected to the valve.

Only clean compressed air may be used for flushing the air lines and for operating the valve.

To avoid malfunctions of the solenoid, we recommend to seal the thread of the compressed air inlet

with liquid plastic (e.g. Loctite) and not by means of Teflon ribbon or similar fibrous material.

Installation, Operating & Maintenance Instructions

Series 75.2, DN 40 (I.D. 1 ½”)

VAT Vakuumventile AG, CH-9469 Haag, Switzerland

Tel ++41 81 771 61 61 Fax ++41 81 771 48 30 Email [email protected] www.vatvalve.com 207088EB

2005-04-28 6/12

2.3.2 Electrical connection

Do not touch any electrically charged parts!

Connect electrical power only if

- valve has been installed into the vacuum system

- moving parts cannot be touched

Electrical connection between fast closing valve and controller is performed by a single connection

cabel according to the following drawing.

Before the controller is connected to the mains make sure that

-the voltage set inside the controller matches the mains voltage (see label near mains socket)

-the opening of the valve is completely free and the plate can move without obstruction

Note: The controller has to be disconnected from the mains before it is disconnected from or

connected to the valve.

Installation, Operating & Maintenance Instructions

Series 75.2, DN 40 (I.D. 1 ½”)

VAT Vakuumventile AG, CH-9469 Haag, Switzerland

Tel ++41 81 771 61 61 Fax ++41 81 771 48 30 Email [email protected] www.vatvalve.com 207088EB

2005-04-28 7/12

3 Operation

3.1 Normal operation

Warning: Keep fingers and objects away from the valve opening!

The fast closing valve series 75.2 may only be operated by the controller VF-2 (series 77). Start-up

and operation of the complete system is described in a separate manual.

The valve is closed and opened by compressed air. The valve is kept in the open position by a latch

in the actuator. The cylinder is permanently maintained under compressed air pressure.

Closing is initiated by electromagnetically releasing the latch. After releasing, the compressed air

pressure acts immediately on the cylinder. This results in an extremely short closing time. The final

stage of closing is pneumatically dampened.

To open the valve, the cylinder is actuated by compressed air via a solenoid. The cylinder is engaged

with the latch and pressurized again at the end of the opening movement.

Installation, Operating & Maintenance Instructions

Series 75.2, DN 40 (I.D. 1 ½”)

VAT Vakuumventile AG, CH-9469 Haag, Switzerland

Tel ++41 81 771 61 61 Fax ++41 81 771 48 30 Email [email protected] www.vatvalve.com 207088EB

2005-04-28 8/12

3.2 Operation under increased temperature

See «1.1 Technical data»

The temperatures specified in the technical data must not be exceeded. Temperature differences

exceeding 40°C between gate and seat must be avoided.

3.2.1 Disassembling of the trigger unit for bake out

1. Close the valve and disconnect compressed air pressure (valve is in undefinied position).

2. Then remove the screws as it is shown in pic. 1.

3. Now it is possible to remove the trigger unit (pic. 2).

4. To assemble the trigger unit after the bake out you have to proceed in revers order.

5. Connect compressed air pressure and open the valve.

pic. 1 pic. 2

3.3 Behavior in case of compressed air pressure drop

Valve open: No change (valve remains open and can no more be closed)

Valve closed: Valve does not remain leaktight (opens slightly; cannot be opened completely until compressed air is

available again)

We recommend to use an emergency air reservoir at the compressed air input.

3.4 Behavior in case of power failure

The behaviour at power failure can be set inside the controller, either for «no change» or «valve closes».

Installation, Operating & Maintenance Instructions

Series 75.2, DN 40 (I.D. 1 ½”)

VAT Vakuumventile AG, CH-9469 Haag, Switzerland

Tel ++41 81 771 61 61 Fax ++41 81 771 48 30 Email [email protected] www.vatvalve.com 207088EB

2005-04-28 9/12

4 Trouble shooting

Failure Check Action

Valve does not close/open Power available? Check Power supply

Commpressed air available? Check compressed air

connection/pressure

Leak at the gate Correct compressed air pressure? Check compressed air

connection/pressure

Clean valve seat

Clean gate seal

Replace gate seal

Leak at the valve body Flange seal leaktight? Check flange seal

Bonnet seal leaktight? Check bonnet seal

Screws at bonnet tightened? Check closing torque of bonnet srews

If you need any further information, please contact one of our service centers. You can find the addresses on our website:

http://www.vat.ch

5 Maintenance & repairs

Under clean operating conditions, the valve does not require any maintenance during the specified cycle life.

Contamination from the process may influence the function and requires more frequent maintenance.

Before carrying out any maintenance or repairs, please contact VAT. It has to be individually decided whether the

maintenance/repair can be performed by the customer or has to be carried out by VAT. The fabrication number on the

valve

made in Switzerland

Fabrication No.: patented

. .

752

–

....

–

..../... .

–

......

Fabrication number

has always to be specified.

All supplies (e. g. compressed air, electrical power) must be disconnected for removal/installation of the valve from/into

the system and for maintenance work.

Even with disconnected supply, loaded springs and/or air cushions in cylinders can be potential hazards.

Keep fingers and objects away from the valve opening!

Products returned to VAT must be free of harmful substances such as e.g. toxical, caustic or microbiological ones. If

products are radioactively contaminated, fill in the VAT form «Contamination and Radiation Report» and send it with the

product. The form is available at VAT. The maximum values indicated in the form must not be exceeded.

Installation, Operating & Maintenance Instructions

Series 75.2, DN 40 (I.D. 1 ½”)

VAT Vakuumventile AG, CH-9469 Haag, Switzerland

Tel ++41 81 771 61 61 Fax ++41 81 771 48 30 Email [email protected] www.vatvalve.com 207088EB

2005-04-28 10/12

5.1 Replacement of actuator/gate assembly

The figures in brackets refer to the drawing on page11

a) Removal of actuator/gate assembly

1. Vent vacuum chambers on either side of valve

2. Open valve

3. Disconnect compressed air

4. Disconnect electrical power

5. Remove compressed air line and socket (28/4) for electrical connection

6. Remove screws (28/19) from bonnet

7. Withdraw actuator/gate assembly carefully from body and put it on a clean place

b) Installation of actuator/gate assembly

8. Check and clean sealing surfaces of bonnet and valve seat

9. Put new bonnet seal «VATSEAL» (28/10) on body or bonnet (depending on mounting position)

Attention: Bordering of 2 bore holes must be on the body side!

10. Insert actuator/gate assembly carefully. At first, insert two screws (28/19) and tighten them slightly only at both

centering holes (bordering) of the bonnet seal VATSEAL (28/10). Afterwards, tighten all screws (28/19) uniformly in

diagonal crosswise order, in 2 or 3 steps, by means of the supplied hexagon pin spanner.

Notice! A suitable torque wrench with the appropriate hexagonal insert to tighten the screws

(torque: 9 Nm) is available from VAT (see Spare parts).

11. Connect socket (28/4)

12. Connect compressed air

13. Perform function and leak test

Valve is ready for operation

Replacement of gate

The figures in brackets refer to the drawing on page11

1. Press out pin (28/22) by means of tool

2. Take new gate (28/2) and press in new pin (supplied

with new gate) by using the same tool

Attention:Inspect position of pin in the opening. The

pin must be flush with the valve shaft!

Inspect position of pin!

Replacement of bonnet seal

See «Removal and installation of actuator/gate assembly» page 10.

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