P.A. VS 1200 FL User manual

Ultimo Aggiornamento: 08/10/20
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P.A. –S.p.A. –EQUIPAGGIAMENTI TECNICI DEL LAVAGGIO
VIA MILANO, 13 –CASELLA POSTALE 115 –42048 RUBIERA (REGGIO EMILIA) –ITALY
Tel. [phone] –Fax. [phone] –R.E.A. RE 156319 –R.I. RE11535 –Mecc. RE 013446
C.F. e P. IVA 01035950359 –Cap. Soc. i.v. € 750.000,00 – Codice Identificativo C.E.E. IT 01035950359
ART. 2497 –BIS C.C. DIREZIONE E COORDINAMENTO BENETTI srl R.I. TRIB. DI RE 01480690351
. Web: http://www.pa-etl.it –E-mail: i[email protected]
VS 1200 FL Full opening discharge valve
Suitable for use as a drain valve in high pressure systems. Technical manual: MPA0015EN
TECHNICAL SPECIFICATIONS
CONSTRUCTION MATERIAL
BRASS BODY AND INTERNAL PARTS IN SST
Nominal temperature (1)
90°C
Nominal diameter
DN10
Part nr.
Rated pressure
Permissible
pressure
Minimum ad-
justable pres-
sure
Minimum flow
rate
Maximum
flow rate
Weight
Inlet
outlet
BYPASS
bar
MPa
bar
MPa
bar
MPa
l/min
l/min
g
60.3000.00
1000
100
1200
120
200
20
9
40
2220
G 3/8” 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
•60.3000.00 G3/8”F
- Full opening in case of dangerous overpressure
that could damage the system.
- Deactivation of the trigger only through the
system shutdown for maximum safety.
- Ball valve for better sealing.
- High trigger accuracy.
- Tested to ensure maximum reliability.
- Seal seat available as a spare.
- Fixing studs.
▪

Ultimo Aggiornamento: 08/10/20
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DIMENSIONAL DRAWING
INSTRUCTIONS
SELECTION
This product is suitable for use with fresh and clean water, even slightly additive, with normal detergents. For the use of
different or corrosive fluids, please consult our Technical office. Using non-pure fluids, adopt adequate filtration. Choose
the valve based on the operating data of the machine on which it is to be installed (allowed pressure, maximum flow
rate and maximum system temperature). In any case, no overpressure of the machine can exceed the allowed pressure
stamped on the valve.
FUNCTION
The valve limits the maximum pressure in the circuit. In the event of overpressure, the valve completely discharges the
pump flow. To reset the valve and put the circuit back under pressure, the system must be turned off. During normal
operation of the system, a shutter, pushed by a spring, closes the exhaust port. The setting pressure of the valve is de-
termined by varying the thrust of the spring by means of the appropriate adjustment screw.
INSTALLATION
This product is intended to be incorporated into the finished machine. This appliance, in a machine that produces hot
water, must be installed upstream from the boiler. In any case, even in cold water applications, since accidental over-

Ultimo Aggiornamento: 08/10/20
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heating cannot be excluded, provide for the installation of thermal protection equipment that maintains the water tem-
perature at a value below the maximum allowed.
It is recommended to install the valve with drainage in a tank. It is advisable that the tank is equipped with separating baf-
fles to reduce any turbulence and air bubbles, generated by the introduction of the exhaust flow, which could be harmful
to the pump. If the discharge takes place in the atmosphere, orient the valve so that the water jet does not cause dam-
age to people or property.
In case of assembly with Zero PA series control valves, the VS1200 FL must be installed exclusively downstream (at the
outlet) of the control valve.
CALIBRATION
The valve is supplied uncalibrated. Calibration is performed with the system running and the pressure inside the circuit.
The valve calibration pressure is determined by acting on the adjustment screw (pos. X): screwing the screw increases the calibration
pressure. Once the desired setting pressure has been determined, lock the screw by tightening the nut (pos. X).
It is possible to protect the calibration with the tamper evident cap and the relative pin by applying a seal.
The kit is available only on request.
it is advisable to calibrate the discharge valve at a pressure that is at least 10-15% higher than the system working pres-
sure, if the valve is properly calibrated it must neither leak nor trigger. When you are close to the desired setting, the
valve will start to lose a few drops or will have a slight leakage, at which point screw the adjustment screw just enough to
eliminate the leak. Once the calibration has been carried out, test the system with a few operating cycles, if during this
test the valve loses a few drops or leaks, repeat the calibration or check that the calibration pressure is higher than 10-
15% of the working pressure, as mentioned earlier.
MAINTENANCE
Once a year, check the calibration of the drain valve, directly on the system or on a special test bench.
After each operation to drain the drain valve, check that there are no deposits of debris between the seat and the shutter
that could compromise the seal of the valve.
In any case, even in the absence of drainage interventions, it is recommended to revise the valve every two years.
Check the state of wear of the gaskets and internal components, and if necessary, replace them with original PA spare
parts, taking care during assembly, to lubricate with water-resistant grease.
Maintenance must be performed by specialized technicians.
The manufacturer is not to be considered responsible for damage resulting from incorrect installation and / or mainte-
nance.
TROUBLESHOOTING: CAUSES AND REMEDIES
PROBLEM
PROBABLE CAUSE
REMEDY
The valve leaks from the exhaust dur-
ingnormal operation of the plant.
- Seat or shutter damaged
- Presence of impurities between seat and shutter
- Wrong calibration
- To change
- To clean
- Calibrate
REGULATIONS
See Norm manual
For correct use, follow the instructions contained in this manual and report them on the Use and Maintenance booklet of
the machine on which the drain valve will be installed.
This manual is valid for all types of valves named VS 1200 FL.
Technical data, descriptions and illustrations are indicative and can be modified without notice.
Instructions, maintenance, installation, spare parts manual.
n. MPA.0015.EN