OPERATION & MAINTENANCE INSTRUCTIONS - ORIGINAL VERSION
AVK DOUBLE ECCENTRIC BUTTERFLY VALVES
SERIES 756
COPYRIGHT©AVK GROUP A/S 2018 - AVK INTERNATIONAL A/S, BIZONVEJ 1, DK-8464 GALTEN - WWW.AVKVALVES.EU
MI Butterfly756 rev. AC 2018
TABLE OF CONTENTS
1.
General
2
1.1.
Safety
2
1.2.
Proper
use
2
1.3.
Identification
2
2.
Transport
and
storage
3
2.1.
Transport
3
2.2.
Storage
4
3.
Product
features
4
3.1.
Features
and
function
4
3.2.
Applications
4
3.3.
Performance
4
3.3.1.
Cavitation
4
3.3.2. Maximum permissible flow velocity
5
3.4. Permissible and impermissible modes of operation
5
4. Installation in the pipeline
5
4.1. Conditions required on site
5
4.2.
Installation
location
5
4.2.1. Installations upstream and downstream of the valve
6
4.3.
Installation
position
6
4.4. Assembly instructions and fittings
6
5. Set-up and valve operation
7
5.1. Visual inspection and preparation
7
5.2. Functional check and pressure test
7
6.
Actuators
7
6.1.
General
7
6.2.
Operating
torque
8
6.3. Assembly of the electric actuator
8
7.
Maintenance
and
repair
8
7.1.
General
safety
instructions
8
7.2. Inspection and operation intervals
9
7.3. Maintenance work and replacement of parts
10
7.3.1.
Design
10
7.3.2. Recommendations for the replacement parts
10
7.3.3.
Cleaning
and
lubrication
10
7.3.4. Replacement of the disc seal
10
7.3.5. Replacement of the O-rings in the seal housing
12
7.3.6. Tightening of seal retaining ring
13
7.3.7. Replacement of the seat ring in the body
14
8.
Trouble
shooting 14
9.
How
to
contact
us
15
