Installation, Operating, and Maintenance Instructions
Series 01, DN 16 - 50 (5/8" - 2")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 [email protected] www.vatvalve.com
271691EB
2009-03-09
7/15
3
Operation
3.1
Normal operation
01024/28/32/34- . E01/08
Valve is opened and closed manually.
01024/28/32/34- . E11/21/31/41 Valve is opened by compressed air and closed by a spring.
01024/28/32/34- . E12/22/32/42 Valve is opened by a spring and closed by compressed air.
01024/28/32/34- . E14/24/34/44 Valve is opened and closed by compressed air.
3.2 Operation of manual actuator
Do not exceed the maximum torque of 6 Nm.
This torque is fairly reached by tightening the manual actuator by one hand.
A higher torque may damage the gate seal.
3.3 Operation under increased temperature
See «Technical data»!
The temperatures specified in the technical data are only admissible if the valve is in open or closed position. Operation of
the valve during the bakeout cycle is prohibited.
3.4 Compressed air failure
Pneumatic actuator: single acting with opening spring
valve opens
single acting with closing spring
valve closes
Double acting:
valve closed
valve remains closed and leaktight
valve open
valve position is undefined,
depending on mounting position
3.5 Power failure
Pneumatic actuator: single acting with opening spring
valve opens
single acting with closing spring
valve closes
double acting
(standard solenoid):
valve closes
double acting
(solenoid for impulse actuation - option):
valve remains in its position, but a started movement
will be completed
