P.A. VRPP 600 User manual

Last update: 03/11/2011
1
VRPP 600 –Pressureregulatingvalvebypneumaticcontrol (discharge)
Aisi303
Technicalmanual: E250
Pressure regulating valve
At gun shut off, the water flow is bypassed at reduced pressure
DN 15
Technical specifications
Construction material
- Valve body in stainless steel 303
- Parts in Brass and 303 Stainless Steel
- Pneumatic cylinder Alluminium.
Rated temperature (1) 90°C
Rated diameter DN 25
PART
NUMBER
RATED
PRESSURE
PERMISSIBLE
PRESSURE
MINIMUM
ADJUSTABLE
PRESSURE
MAXIMUM AIR
PRESSURE
MAXIMUM FLOW
RATE
WEIGHT INLET
OUTLET
BYPASS
bar MPa bar MPa bar MPa bar MPa l/min g
60.5450.00 560 56 600 60 25 2.5 10 1 80 3540 G 1/2” F
1) The valve has been designed for a continuous use at a water temperature of 60°C. It can resist for short periods at a
maximum temperature of 90°C.
• 60.5450.00 VRPP 600 G1/2” FF
- Pneumatic piston control.
- Pneumatic piston at max pressure => max defined pressure;
without air pressure => circuit in low pressure
- Possibility to vary the working pressure by adjusting the air feed
pressure
- Possibility to adjust the max working pressure mechanically.
- Usable with a multiple number of lances.
- High balancing to guarantee slight variations of the rated
pressure when the flow varies in bypass.
- Fixing device PI.EFFE.CI. AC6-45 - M6 screws UNI 5391.

Last update: 03/11/2011
2
DIMENSIONAL DRAWING
DESCRIPTION
The valve has an inlet fitting, an outlet fitting and a bypass fitting with G ½” F threading.
A pneumatic jack is fitted to the valve with a feed fitting G ¼” F thread.
SELECTION
This product is to be utilized with clean fresh water, even slightly additivated with normal detergents. For use involving different or
corrosive liquids, contact the PA Technical department. Appropriate filtration should be installed when using unclean liquids. Choose
the valve in line with the running data of the machine where to be installed (rated pressure, max flow and max temperature of the
system). In any case, no machine overpressure has to exceed the permissible pressure imprimed on the valve.
FUNCTION
The valve regulates the max pressure of the system altering the flow discharged by the bypass. The adjustment is carried out by
changing, through means of a piston, the position of a shutter that partially closes the bypass opening.
INSTALLATION
This product is bound to be incorporated on a finished machine. This accessory, on a machine that produces hot water must be fitted
upstream to the heat generator. On a system that generates hot water, anticipate the fitting of accessories that limit the accidental
increase of fluid temperature.
Always install a safety valve in the circuit.
The pneumatic jack has to be fed with dry air and lubricated to the maximum pressure of 10 bar – 1 Mpa.
It is recommended to use a nozzle with a flow rate that at gun opening, permits to discharge regularly from the bypass of the valve at
least 5% of the flow supplied by the pump in order to have a constant pressure value, easy adjustment and to avoid troublesome
pressure spikes at gun closure.
If the nozzle wears out, the working pressure drops. To revive the working pressure, change the worn out nozzle. On installation of a
new nozzle, re-adjust the system to the original working pressure.
DISCHARGE SYSTEM AND WATER ADDUCTION
We recommend to fit the valve with bypass discharge to a tank. It is advisable that the tank be fitted with deflectors to reduce eventual
turbolence and air bubbles generated by the immission of the bypass flow which could be harmful for the pump. With elevated flow or
near to the maximum flow of the valve, the installation with a recirculation of bypass direct to the pump could cause potential pressure
spikes harmful to the pump.

Last update: 03/11/2011
3
PRESSURE ADJUSTMENT/SETTING
The adjustment has to be made with the system under pressure and the gun open and with the air feed pressure at 4 bar – 0.4 MPa.
Vary the pressure by screwing/unscrewing the jack head (pos.24). This operation will be less difficult if the correct nozzle has been
chosen. Upon screwing the jack head (pos.24), it must correspond with a pressure increase; failing this before the desired value, do not
insist, but verify the correct ratio nozzle/rated pressure. Upon reaching the desired pressure, tighten the nut (pos.21). After setting the
maximum pressure, it is possible anyhow to vary the valve work pressure by adjusting the air feed pressure. By increasing air
feed pressure, valve pressure will increase as well. To decrease valve pressure, it is necessary to reset air pressure and subsequently
increase it again up to the desired pressure level. If the air feed is interrupted the complete circuit will go into low pressure.

Last update: 03/11/2011
4
PROBLEMS AND SOLUTIONS
PROBLEMS PROBABLE CAUSES SOLUTIONS
Valve cycles - Air inside the system
- Worn out seals
- Clogged bypass or diameter too small
- Flush out
- Replace
- Clean or widen passages
The valve does not reach
working pressure
- Piston seals ruined
- Presence of impurities between seat and shutter
- Seat & shutter worn out
- Nozzle worn out
- Incorrect choice of nozzle
- Air shortage in pneumatic jack
- Air pressure too low
- Pneumatic jack seals worn out
- Replace
- Clean seat
- Replace
- Replace
- Fit nozzle with inferior flow factor
- Open air compressed feed
- Reset air pressure to circa 4 bar
- Replace
Pressure spikes - Minus min 5% of total flow in discharge
- Clogged nozzle
- Re-adjust correctly
- Clean or replace
MAINTENANCE
STANDARD: every 400 working hours (circa 10,000 cycles), check and lubricate the seals with water resistant grease.
SPECIAL: every 800 working hours( circa 20,000 cycles), control the wear of the seals and internal parts and if
necessary, replace with original PA parts taking care during installation and to lubricate with water resistant grease.
Maintenance has to be carried out by Specialized Technicians.
The manufacturer is not to be considered responsible for damage as a result from incorrect fitting and
maintenance
REGULATIONS : see norm manual
The accessory hereby described bears the CE marking in accordance with the Norms and Directives applied on
the Declaration of conformity.
For a correct utilization, follow the directions described in this manual and re-print them on the Use and maintenance
manual of the machine.
Make sure that you are given the Original Conformity Declaration for the accessory chosen. The present manual is
valid for all unloader valves named VRPP 600.
Technical data, descriptions and illustrations are indicative and liable to modification without notice.
Instruction manual, maintenance, installation, spare parts
For a correct utilization, follow the directions of this manual
Re-print them on the Use and Maintenance booklet of the machine.
n. 12.9250.00

Last updated 10/09/2013
60.5450.00 VRPP 600 regul.valv. 1/2"F Bsp-air contr.
Pos. P/N Description Q.ty K1K2K3K4 Pos. P/N Description Q.ty K1K2K3K4
1 60.5401.55 Housing -VS23-VRP/P600, 1/2F Bsp brass 1 1
2 10.4036.17 Back-up ring, 14x2x17x1,5 mm 1 • 10
3 10.3064.01 O-ring, 1,78x14 mm Ni 85 1 • 10
4 60.5404.51 Seat, 9,2x17x7,5 mm Sst. 1 • 5
5 60.5403.51 Shutter pin, M7 Sst. 1 • 3
6 10.4039.00 Back-up ring, 15,7x18,5x1,5 mm 1 • 10
7 10.3066.01 O-ring, 1,78x15,6 mm Ni 85 1 • 10
8 60.5410.51 Lower spacer ring, 8x21,4x11,5 mm Sst. 1 3
9 10.2008.00 Stem seal, 8x13x2,2 mm +O-ring 1 • 5
10 10.3070.02 O-ring, 1,78x18,77 mm Ni 85 1 • 10
11 10.4057.00 Back-up ring, 18,7x21,5x1,5 mm 1 • 10
12 60.5409.51 Upper spacer ring, 8,3x21,5x17 mm Sst. 1 3
13 10.2013.00 Stem seal, 12x17x2,2 mm +O-ring 1 • 5
14 60.5408.51 Piston, M7 Sst. 1 5
15 60.5407.51 Piston holder, Sst. 1 5
16 14.7443.10 Ball, 11/32" Sst. 1 10
17 60.5406.31 Spring rest pin, brass 1 3
18 60.5402.61 Spring, 5,4x22x64,5 mm z.pl. 1 3
19 60.5451.31 Spring guide spacer, brass 1 10
20 16.2100.00 Set screw, DIN914 M4x4 mm 1 10
21 60.1814.31 Ring nut, M27x1 brass 1 5
22 11.0445.52 Collar, d.45x30 mm 1 1
23 16.1897.22 Screw, DIN912 M6x22 mm z.pl. 4 5
24 60.5452.31 Piston holder, brass 1 1
25 10.2020.25 Stem seal, 20x25x4 mm 1 • 5
26 11.8901.14 Pneum. filter, G1/4 1 3
27 60.5322.41 Valve head, Al 1 3
28 60.5323.85 Bushing, opn. 20x24x14,8 mm PTFE 1 • 3
29 60.5321.61 Piston, 20-M12x94 mm 1 3
30 10.3058.01 O-ring, 1,78x10,82 mm 1 • 10
31 60.5326.41 Piston, Al 1 3
32 11.4740.00 Hex. nut, M12 1 10
33 60.5324.46 Jacket, Al 1 3
34 60.5325.41 Valve bottom, Al 1 3
35 10.2100.00 Piston seal, 90x100x4,5 mm 2 • 5
36 10.3106.00 O-ring, 2x103 mm 2 • 5
Kit P/N Description
K1 60.5411.24 Spares kit -VRP/P 600, 10x1pcs. 1
K2 60.5327.24 Spares kit -pneum. cylinder, 5x1pcs. 1

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NOTE NOTES

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NOTE NOTES

P.A. SpA EQUIPAGGIAMENTI TECNICI DEL LAVAGGIO
Via Milano, 13 42048 Rubiera - (RE) ITALY
Tel [phone] (ric aut) - Fax [phone]
[email protected] - www.pa-etl.it