3
6. Install the pump upright, vertical to the surface of the water, as shown in the drawing on the left. Do
not install it below the surface of the water, or parallel to or at an oblique angle to the water's surface.
7. The VKN series are designed so that the possible fluid leaking through the shaft seal is drained to
protect the motor, this occurs when the shaft seal (mechanical seal) is worn or damaged. Proper
steps must be taken in advance for drainage of this leakage back to the oil or fluid tank.
8. In case of the immersion type (VKS, VKP, VKR, series) it is necessary to make the hole for the oil
reservoir slightly larger in diameter than the outside diameter of the pump section.
9. The VKP115A, VKP075J, 085J, 095J, VKR series and VKS series both have a suction port at the
bottom. The distance to the bottom of the tank should be larger than the value shown in the outline.
Piping --------------------------------------------------------------------------
1. The piping should be as short as possible, with minimum bends, elbows, joints and valves. Be sure to
use pipes of the standard diameters.
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.
(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.
