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5

SOFT START VALVE (APR)

ONE’s soft start valve is completely new compared to others
currently on the market. The pressure is increased gradually
whatever the flow rate of the utilities.
When the solenoid valve is powered on (if there is an electric soft
start valve) or you turn the manual V3V valve to ON (if there is
a non-electric soft start valve), the downstream pressure starts to
increase.
When it reaches about 30-40% of the set value, the valve opens
completely and the pressure rises to the set value.
The pressure increase can be regulated with precision on the
knob on the front.

1-

 Turn in the 

“Slow”

 direction to increase the ramp time. If you

rotate as far as it will go, this cuts off the flow of air completely,
and the pressure does not increase.

2-

 Turn in the 

“Quick”

 direction to decrease the time it takes to

open the valve. If you rotate as far as it will go, the valve will
open almost immediately, deactivating the progressive actuator
function.
After regulation, press the knob to lock it.

PRESSURE SWITCH

The pressure switch has a switching contact, which means you
can have a normally-open signal or a normally-close signal. It
is also connected to the 

NC

 and 

NO

 LEDs which come on if the

actual pressure is less or greater than the set pressure, respectively.
The LEDs only come on if an electric charge (max 0.5 A) is
connected to them, as shown in the diagram (see subsection on
LEDs).
Regulation is by means of the knurled knob. Turn towards “

+

to increase the pressure and vice versa.
Proceed as follows to make a correct setting.

-

 Turn the knob towards “

-

“ as far as it will go.

-

 Set on the pressure regulator the value at which you wish the

pressure switch to activate and read it on the gauge. The 

NO

LED is on

 and the 

NC

 LED is off.

-

 Turn the knob towards “

+

”  until switching takes place.

-

 Press the knob to lock it.

-

 Reset the desired value for normal operation on the pressure

regulator.

SECURITY KNOB

Pull outwards to remove the knob from the APR/pressure switch
on the unit. Insert the security knob and regulate the APR/ pressure
switch. Then press the handle firmly to lock it in position. If the
APR/pressure switch needs to be reset, remove the security knob
by forcing it laterally with a screwdriver (A).

A

High switching pressure

Low switching pressure

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Summary of Contents for ONE

Page 1: ...USE AND MAINTENANCE ...

Page 2: ...ply includes 2 screws M5x75 2 washers 5x10 2 nuts M5 ONE has been designed to treat compressed air No other fluid can be used without express authorisation by Metal Work It is preferable to use UNLUBRICATED air If there are devices requiring lubrication it is advisable to install the lubricator downstream ONE as close as possible to the devices involved Connect the ports to the thread by rotating ...

Page 3: ...te whilst the bowl is pressurised The simple manual operation of pushing up the valve will allow the condensate to drain When rotating the button clockwise the valve becomes in locked position and can only work when the button is returned to the central position The semi auto condensate drain is the normally open type When there is pressure in the bowl the drain closes When there is no pressure in...

Page 4: ...itch setting and if an electrical circuit is connected NO YELLOW LED Pressure switch s normally open contact It is on if the actual pressure is higher than the pressure switch setting and if an electrical circuit is connected CLOGGED FILTER SIGNAL If the filter gets so clogged up that it causes an excessive drop in pressure as the air passes through the orange indicator will project from the body ...

Page 5: ...Considering that the air in the cartridge flows outwards the dirt collects inside the cartridge and does not affect the other internal surfaces It is always advisable however to clean the inside of the unit and the plug When you replace the plug tighten it to a maximum torque of 6 Nm taking care not to damage it Use an 8 mm Allen wrench if necessary 1 Turn the knob until you read the desired value...

Page 6: ...nal or a normally close signal It is also connected to the NC and NO LEDs which come on if the actual pressure is less or greater than the set pressure respectively The LEDs only come on if an electric charge max 0 5 A is connected to them as shown in the diagram see subsection on LEDs Regulation is by means of the knurled knob Turn towards to increase the pressure and vice versa Proceed as follow...

Page 7: ...the knob by pulling it upwards and then regulate 4 SHUT OFF VALVE V3V PROBLEM 4 1 No air passes downstream 4 2 The air gets continuously released CAUSE In the manual version the knob is in OFF position No pneumatic control in the pneumatic version The manual V3V is in OFF position REMEDY Put the knob on the ON position Check the presence of the pneumatic control Put the knob on the ON position 3 P...

Page 8: ...elf by pushing sideways 4 Unscrew the silencer on the exhaust E 5 Remove the 1 4 A7 plugs F or any fittings mounted from the supplementary outputs 6 Unscrew the 2 2 2 screws G on the three sides of the guard 7 Remove the guard H by pulling it from the front 8 Remount the guard following the above operations in the reverse order 1 Unscrew the two M4 x 45 screws A 2 Extract the threaded port B 3 Cle...

Page 9: ...242E or 542 4 Screw on the new pressure gauge making sure the markings are horizontal 5 Remount the guard 1 Remove the guard 2 Remove the regulator knob A 3 Unscrew the bell B using the key provided 4 Remove all the components for the pilot regulator C 5 If you wish to replace the poppet as well unscrew the 2 screws E and remove the poppet presser D and poppet F 6 Remount the new parts with great ...

Page 10: ...c board 7 Mount the new pressure switch in the reverse order Grease the OR seal of the valve 8 To get the class of protection IP65 it is necessary to apply new sealant where the existing sealant is damaged A silicon sealant can be used for this purpose 9 Remount the guard 10 Calibrate the new pressure switch following the instructions given above NB during the disassembly stage it s probable that ...

Page 11: ...nance not covered in this handbook please contact Metal Work s Sales Office They will either arrange for the repairs to be made or provide you with full technical details so that you can do it yourselves OTHER INTERVENTIONS IS ENVIRONMENTALLY FRIENDLY As it weighs less than a quarter compared to the conventional units it saves a considerable amount of raw materials such as aluminium and technopoly...

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