LTI
04 / 2014
General:
Observe the following storage instructions:
Environment:
Temperatures:
Transportation:
Commissioning:
Delayed initial opening caused by so-called sticking (adhesion) effect of the seating (001 / 003) and disc (060) is quite normal after
transportation and longer storage of valves with a preset response pressure. This applies both to metal/elastomers sealing faces and highly
polished metal/metal faces.
When the valve has been fitted the sealing faces are separated by pressurisation higher than the actual response pressure and by operating the
venting lever.
The valve, together with the preset pressure response, is now fully functional, taking the permissible pressure increase/closing pressure into
consideration.
Attention!
• The regional safety regulations are to be observed.
• The material, pressure, temperature and flow direction specifications must be checked prior to commissioning.
• The valve data are to be checked for position (arrangement) in the system.
• Residues in pipelines and valves (welding beads, grinding dust, dirt etc.) lead to leakage or damage.
• Touching the valve can give rise to the risk of injury when it is operated at high medium temperatures of (>50°C)
or low temperatures of (>0°C).
• Remove the blocking screw (149), which may have been used, from the cap (120).
• Remove protective caps and lever fixtures prior to commissioning.
• Sticking, freezing or blockage of the valve is to be avoided without fail.
• When a blow-out pipe is not used, the medium can suddenly escape from the valve outlet aperture. Hazard!
• Large amounts of flow noise can be heard when blowing out.
Care is to be taken to ensure prior to putting a new system into operation or restarting a system that has been subject to repair or
conversion that:
• All work is completed in an orderly manner!
• The valve is in the correct function position.
• Safety devices are in place.
NI-Valves are high quality products which must be treated with care. The sealing faces on the seating (001 / 003) and disc
(060) are hardened, annealed, ground and lapped. Improper handling can cause them to be damaged, resulting in leakage
and inoperability. They must therefore be protected against shocks (throwing, impacting, hitting etc.). On valves equipped with
a venting lever etc., the lever must not be misused as a carrying handle. All valves are to be properly secured to prevent them
falling over or falling down in the course of transportation, fitting and maintenance.
Places of storage must be clean and dry.
NI-Valves should be stored at temperatures between 5°C to 35°C, the best being 10°C to 20°C. The instructions for disc
sealing must be complied with in the case of soft sealing valves.
Only use suitable packing materials for transportation. Inlet and outlet apertures are to be protected for transportation purposes
by caps or plugs which are only to be removed shortly prior to assembly.
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