Inlet Conditions (Suction); Filtering; Outlet Conditions; Speed And Rotation Direction - UDOR VY Series Use And Maintenance Manual

B. No. 5 G 1/2" Outlets (also called Delivery fittings); by removing or inverting the sealing caps, they can all be
used indifferently, as fittings for regulator and maximum pressure valves, gauges, pipes of spray guns or other
high pressure components. The seal between the sealing caps and head is guaranteed by a special stainless
steel seat with double taper; the caps and head are machined so that they couple perfectly with this special
seat.
The Inlet and Outlet of the Pump CANNOT be
C. No. 5 G 1/4" outlet fittings, for collecting the water of the internal "Cooling System", which consists in deviating
a small amount of supply water into the pump to cool and keep the pistons and high and low pressure seals
clean, thus increasing their service life. These five fittings can be used in two different configurations: the
standard configuration envisages the use of just one collection pipe of the cooling water, which must be
positioned at the side, opposite the Inlet port used, inverting the position of the male-male nipple G1/4" and
opposite sealing cap if necessary. The second possibility of use envisages closing both side outlets and
using three different collection pipes of the cooling water, to be positioned under the central casing of the
Pump.
In both cases, the water that comes out of the "Cooling System" must be conveyed on the inlet line of the
pump, before the booster pump, or into a dedicated tank.

6.3 INLET CONDITIONS (SUCTION)

The UDOR pumps of the VY series must be supplied at an inlet pressure between 2 and 6 bar (0.2 MPa and 0.6
MPa - 29 and 87 PSI). If a Booster Pump is used, which is to be started before the UDOR pump, it shall have a
minimum flow rate at least double the flow rate of the model of pump of the VY series used; this minimum flow rate
must be supplied at the booster pressure used.
- Avoid any turbulence near the Pump inlet; the discharge of the pressure regulator valve must not be connected to
the supply line of the pump.
- Turbulence must be absolutely avoided near the outlet of the supply tank (inlet line of the Booster Pump).
The inlet pipeline must comply with the following requirements:
- Any point of the inlet pipeline cannot be smaller than the internal diameter of the Pump inlet.
- Be absolutely leak-proof to avoid any air infiltration.
- Not have 90° bends near the Pump inlet.
- Not have contractions or restrictions.
- Avoid any turbulence near the Pump inlet; the discharge of the pressure regulator valve must not be connected to
the supply line of the pump.
- Turbulence must be absolutely avoided near the outlet of the supply tank (inlet line of the Booster Pump).
Any other use is not admitted unless authorized in writing by the Engineering Department of UDOR.

6.4 FILTERING

The filter must be installed as close as possible to the pump inlet and it must allow 3 times greater than the flow
required by the Pump, it must not cause any contraction or any pressure drop and should be cleaned on a regular
basis to ensure its proper functionality.
The recommended filtration degree is 150 mesh – 100 micron.

6.5 OUTLET CONDITIONS

- A safety valve must be installed on the delivery line of the system.
- Make sure the delivery line and all the accessories are connected correctly, secured firmly, hermetically sealed and
that the pipes are sized appropriately.
- All pressurized pipes must be marked durably with the maximum admitted pressure, which must never be less than
the maximum working pressure of the Pump, written on the Label.
- If there are excessive pulsations in the system where the Pump is fitted, install a correctly sized pulsation damper
(accumulator).

6.6 SPEED AND ROTATION DIRECTION

The rotation speed of the shaft of the Pump must never exceed the RPM written on the Label of the actual
Pump.
The minimum RPM admitted is 700 RPM.
The rotation direction of the shaft of UDOR Pumps may be clockwise or counterclockwise.
inverted..
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