Service; General; Removal And Disassembly - GF 514 Betriebsanleitung

Operating Instructions
7

Service

7.1

General

WARNING!
Check regularly for wear!
Components coming into contact with medium during operation are subject to wear and tear. Frequent positional movement or the
use of aggressive chemical or contaminated medium results in frequent service being necessary.
► Regular implementation of visual and functional inspections of the valve corresponding to the conditions of use and the hazard
potential aids in preventing leakage and damage.
► Disassemble of the valve and checking the valve internally for wear and tear at the appropriate intervals.
► Adjust the service intervals to the usage conditions and the resulting load of the valve.
► Components where the valves are worn internally are to be replaced immediately.
► Wear appropriate protective equipment.
WARNING!
Leaking gasket!
Danger of injury due to escaping medium because of damaged, aged or incorrectly lubricated gaskets.
► Store gaskets if possible in a cool (room temperature), dry and dark place.
► Before installing them, the gaskets have to be checked on possible aging damages, such as fissures and hardenings.
► Regularly inspect for damage and replace gaskets if necessary.
► Lubricate the gaskets with silicone or Polyol based grease. Do not use mineral oil-based greases or Vaseline (Petrolatum).
► Observe the special manufacturers notes for paint-compatible valves (LABS cleaned).
DANGER!
Do not grease the housing nut!
The use of grease, especially on amorphous plastics, can cause stress cracking on the Valve body. There can be consequences after
contact with hazardous medium. The functioning of the valve is no longer guaranteed.
► Do not use any grease on the threaded connection between the housing nut and the Valve body.
7.2

Removal and disassembly

DANGER!
Uncontrolled evasion of the medium!
If the pressure in the piping system has not been completely relieved, the medium can escape in an uncontrolled manner. Depending
on the type of medium, risk of injury may exist.
► Completely relieve pressure in the pipe before opening.
► In case of harmful, inflammable, hot or explosive medium, completely empty and flush pipe. Possible residues must be taken
into account.
► Provide for safe collection of the medium by implementing appropriate measures (e.g. connection of a collection container).
► Drain the valve with the valve in the half-open position and collect the medium.
► Hazardous medium residues may remain in the valve despite drainage.
► Wear appropriate protective equipment.
Diaphragm valve type 514, 515, 517, 519
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