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General| Brand | Vag |
|---|---|
| Model | ZETA |
| Category | Controller |
| Language | English |
General safety precautions and compliance with electro-technical rules for installation and operation.
Describes the intended use of the ZETA® Knife Gate Valve in pipelines, including operational limits.
Guidelines for transporting the valve, emphasizing protection against external influences and damage.
Instructions for storing the valve, focusing on protecting elastomeric parts and preventing condensation.
Details the full-flange design, bidirectional sealing, U-profile gasket, and lateral seal of the knife gate valve.
Lists suitable media for the standard NBR sealing material and advises contacting the manufacturer for special applications.
Warns against excessive force, specifies suitability for Open/Close operation, and outlines temperature/pressure limits.
Requirements for flange alignment, pipeline tension, and protection from dirt during installation.
Guidance on selecting an installation location, considering space, weather protection, and access for maintenance.
Recommendations on valve inclination in pipelines, especially for media with solids, and contact for deviating positions.
Details bidirectional installation, checks for damage, protection from dirt, and correct use of lifting equipment.
Procedure for visually inspecting functional parts before operation, emphasizing cleaning and lubrication.
Steps for connecting the actuator to mains, checking rotation direction, and operating the valve through its stroke.
Guidance on using the handwheel for emergency operation, cautioning against excessive force and blocking.
Procedure for checking valve movement, pressure tests, and lateral seal adjustment for leak-freeness.
Safety measures before inspection/maintenance, including shutting off, depressurizing, and checking connections.
Recommendation to operate the valve fully yearly, with more frequent checks for extreme conditions or soiled media.
During maintenance, operate the valve fully and lubricate stem/knife if movement is difficult.
Instructions on re-tensioning the lateral seal or replacing it if leaks persist after operation.
Procedure for replacing the U-profiled gasket when leaks occur at the knife passage due to wear.
Details on keeping the rising stem clean and lubricated, cleaning the knife, and relubricating the output drive.
Provides recommendations for replacing lateral seals, U-profile seals, stem, and stem nut with recommended spare parts units.
Addresses problems with the knife not moving or being jammed, including causes and solutions.
Explains causes of high operating forces and provides solutions like cleaning and lubrication.
Details causes for leaks at the knife passage, such as damaged U-profile gaskets, and repair procedures.
Covers leaks at the knife outlet, including issues with the lateral seal and their remedies.
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