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Idiomas disponibles
Idiomas disponibles
Available ranges
0,1 – 2,0 bar
/ 1,5 – 30
1,4 – 14,0 bar
/ 20 – 200 psi
7,0 – 21,0 bar
/ 100 – 300 psi
Installation
• Valves DN50 up to DN150 can be mounted
horizontal and vertical. Valves from
DN200 up to DN600 should be installed
horizontally.
• Before installation of the regulating
valve (and respective strainer), it is
recommended to fl ush the upstream line, in
order to clear it of sludge and other debris.
• It is better to install at the upstream and
downstream side of the valve a Watts
Butterfl y valve to make maintenance easier.
Note: An effi cient fl ushing should be
made with a fl uid velocity of at least
1,5 m/s during several hours.
• Install the valve so that the FLOW ARROW
marked on the valve body matches fl ow
through the line.
5
2
3
1
PV20-C (brass)
psi
Step 1.
On pressure sustaining/relief pilot,
loose lock nut and turn the setting screw
counter-clockwise (OUT), until the screw is
practically unloaded. This is the simulation
of the lowest setting value of the range, from
which the commissioner has to gradually
increase the pressure, up to the prescribed
one.
Note: Do not set the pressure sustaining/
relief pilot (4) if the valve is pre-set by
Watts Industries.
Step 2.
Vent air of cover through the safety venting
cock mounted on cover (5).
PV20-C (SS)
X
X
X
6
4
No. name
1
Body/Main valve
2. Fixed orifi ce
3. Flow strainer
4. Pilot valve
5. Air vent
6. Flexible tubing
PR600
X
X
X
3
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