Installation, Operating & Maintenance Instructions

Series 64, DN 63-400 (I.D. 21/2" - 16")

VAT Vakuumventile AG, CH-9469 Haag, Switzerland

Tel +41 81 771 61 61 Fax +41 81 771 48 30 CH@vatvalve.com www.vatvalve.com

219034EM

2013-08-27

11/19

3

Operation

3.1

Normal operation

Operation is allowed only after proper installing procedure.

3.1.1

Adjustment of the intermediate position

The intermediate position can be adjusted (allen wrench 8mm) independently of the air pressure by means of the bolt

screw 'M' (see also page 7 and picture below), on the face side of the auxiliary cylinder.

Before moving the bolt screw 'M', open the locking screw (B) (allen wrench 2.5mm). After adjustment the intermediate

position, fasten the locking screw (B).

For easy adjustment, VAT is recommending to switching off the compressed air during adjustment of the intermediate

position.

A-side actuator: turning bolt screw 'M' clockwise moves the intermediate position to open

B-side actuator: turning bolt screw 'M' clockwise moves the intermediate position to close

The position indicator on the valve can be adjusted for the set intermediate position. Move valve with bolt screw 'M'

to the desired position and than turn the screw (A) with a screwdriver size 2 on top of the position indicator box in either

direction until the microswitch Lz switches. (Lz = position indicator for intermediate position)

A

position indicator for intermediate position

M

B