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

12/19

3.2

Operation under increased temperature

See «1.1 Technical data»

3.3

Behavior in case of differential pressure

Note: Do not open the valve, if the differential pressure on the gate is larger than 30 mbar.

3.4

Behavior in case of compressed air failure

Valve closed:

valve stays closed and leaktight

Valve open or Intermediate position: valve stays open or moves into closed (not leaktight) position, depending on the

mounting position

3.5

Behavior in case of power failure

Standard solenoids: valve closes

Impulse solenoids:

valve moves to the position of last command and stays in this position

The solenoids can be actuated manually in case of power failure according to the following instructions:

Standard solenoid valve

Solenoid for impulse actuation (option)

Emergency

operation screw

Emergency

operation screw

SV1

SV2

5

1

3

To open the valve:

Turn emergency operation screw fully clockwise

To close the valve:

Turn emergency operation screw fully counter-

clockwise

Attention!

Remote operation is only possible when the screw is

turned fully counter-clockwise

To open the valve:

Turn emergency operation screws of coils «SV1»

clockwise to mechanical stop. Turn back emergency

operation screws counter-clockwise as soon the valve

is open

To close the valve:

Turn emergency operation screws of coils «SV2»

clockwise to mechanical stop. Turn back emergency

operation screws counter-clockwise as soon the valve

is closed

Attention!

Remote operation is only possible when both screws

are turned fully counter-clockwise