- Check the bolts on top of the gearbox;
- Check the bolts on the valve flange;
- Perform a test run every six months;
- Check the gearbox for leakage of grease;
- For gearboxes with permanently vibration and exposure above 60ºC, checks should be performed at
shorter intervals.
3.6 Storage
The gearboxes need to be stored inside in a safe way to avoid accidents. Also avoid storage in areas subjected
to high temperature extremes and /or areas subjected to large amounts of humidity and dust. Protect against
floor dampness by storage on a shelf or on a wooden pallet. Apply suitable corrosion protection agent to bare
surfaces.
3.7 Long-term storage
If the Gearbox must be stored for a long period (more than 6 months) the following points must be observed.
Prior to storage:
• Protect uncoated surfaces, in particular the output drive parts and mounting surface, with long-term
corrosion protection agent.
At an interval of approximately 6 months:
• Check for corrosion. If first signs of corrosion show, apply new corrosion protection.
3.8 Packing
Our products are protected and packed by special packaging for the transport ex works. The packaging consists
of environmentally friendly materials which can easily be separated and recycled. We use the following
packaging material: wood, cardboard, paper, and PE foil. For the disposal of the packaging material, we
recommend recycling and collection centres.
3.9 Handling
Never drop the gearbox or otherwise subject it to strong impact. Standard gearboxes are delivered without
eyebolts. On request assembled eyebolts are available for the AB gearboxes these need to be ordered in the
preliminary stages of the order. Eyebolts should only be used to lift the gearbox horizontal on the valve. The
input shaft or hand wheel cannot be used for lifting the gearbox. Do not lift the gearbox when it is assembled to
the valve with eyebolts, input shaft or handwheel.
3.10 IP rating and environmental conditions
The enclosure protection IP65, 67 and 68 only refers to the interior of the gearboxes and not to the stem shaft
coupling compartment. (See table. 6 - IP rating)
Suitability for any specific application is not claimed. IP rating is done in accordance to a standard test
protocol. It is recommended that users carry out tailor made tests to prove the product is fit for purpose for the
specific environmental conditions. For example marine environment, tropical conditions, cold or very hot
conditions, chemical sites with acids or salty conditions requires the end user to assess the fit for purpose.
When the product is used in areas with high temperature fluctuations it is recommended to use pressure
compensators to prevent pressure differences between the outside environment and the interior of the gearbox.
3.11 Stem shaft water ingress
Water can enter into the coupling compartment along the valve shaft, this would lead to corrosion. Therefore a
suitable anticorrosive (or sticky grease) must be applied on the inside bore hole of the gearbox and coupling
before mounting. When water ingress protection towards the stem shaft and rotating quadrant in the coverplate
is required, aluminium position indicators with NBR O-ring is needed, which should be mentioned during
order process. Our G and W gearbox type are suitable. A condition that can occur in some areas is snow on top
of the gearbox with melting water on top of the gearbox, in that case the position indicator with O-ring is
recommended. For horizontal outdoor installation also a sealed aluminium position indicator is recommended.
For gas applications with sealed position indicators an air vent in the indicator could be required. In case of
permanent submersion of the gearboxes or for buried service, a protection cover must be fitted instead of a