Publicidad
Idiomas disponibles
Idiomas disponibles
2) The piping should be supported making sure that the weights of the inlet and outlet pipes are not
applied to the pump body.
3) Avoid using unreasonable force when connecting the inlet and outlet ports of the pump to the piping.
Otherwise, the joints of the pump may be damaged.
4) The joints should be treated with seal tape or fluid packing to prevent leakage of water and air. In the
VKN series, special care should be taken with regard to air leaks through the suction pipe, for it
reduces the water flow or the pump may not prime itself.
5) Use an oil reservoir with the largest possible capacity. The capacity should be more than "3 times" the
flow of the pump per minute. If the capacity is too small, it can result in increase in fluid temperature.
Damage to the pump may be caused by metal chips or air bubbles which reduces the pump capacity.
6) Make certain that the pump and reservoir is free from metal chips, dust and other foreign matter, prior
to start up. It is recommended that an overhaul device (3 steps or more) and a filter be installed. In the
VKN series (self - priming type), entry of metal chips in the pump will damage the shaft seal
(mechanical seal).
7) If there is any possibility of water hammering, a pressure buffer (accumulator, etc.) needs to be
installed.
8) VKN series (self - priming type)
1 The suction pipe should be up to 0.7 m in length including horizontal sections.
(VKN083A, VKN085A, VKN085H and VKN095H: Max. 0.6 m)
If it becomes necessary to extend the length of the pipe, attach a check valve having a small head
loss to the end of the pipe.
2 The end of the suction pipe should be immersed in the fluid to the depth ("L" shown in the figure)
and spaced apart from the wall of the oil tank ("B" shown in the figure).
When the end of the pipe is positioned too high or it is too close to the wall, air is sucked up which
causes failure of fluid pumping-up, vibration and noise, etc.
3 The end of the suction pipe should be sufficiently spaced apart from the bottom of the oil tank ("Lb"
shown in the figure), otherwise, it can result in failure of pumping-up and entry of metal chips.
JEM Dimension Length of suction pipe: Max. 0.7m
(VKN083A, VKN085A, VKN085H and VKN095H: Max. 0.6 m)
9) In case of VKN043A to 093A, VKN045A to 095A, VKN055H to VKN095H, the position of inlet and
outlet can be adjusted 60° at a time by rearranging the pump casing and the bottom plate.
- 4 -
Publicidad
