LV
Series
High Purity Chemical Liquid Valve
Precautions 2
Be sure to read this before handling the products.
Refer to the back cover for Safety Instructions.
1. Maintenance should be performed in accordance with
the procedures in the Operation Manual.
Incorrect handling can cause damage or malfunction of machin
ery and equipment, etc.
2. Before removing equipment or compressed air supply/
exhaust devices, shut off the air and power sup plies,
and exhaust compressed air from the system.
Further, when restarting equipment after remounting
or replacement, first confirm safety and then check
the equipment for normal operation.
3. Perform work after removing residual chemicals and careful
ly replacing them with DI water (Deionized water) or air, etc.
4.
Do not disassemble the product. Products which have
been disassembled cannot be guaranteed.
If disassembly is necessary, please contact SMC.
5.
In order to obtain optimum performance from valves,
perform periodic inspections to confirm that there are
no leaks from valves or fittings, etc.
Maintenance
Warning
Handling
1. When the diaphragm is made of PTFE
Please note that when the product is shipped from the factory,
gases such as N
2
and air may leak from the valve at a rate of
1 cm
3
/min (when pressurized).
2. When operated at a very low flow rate, the LV
m
series
with
flow rate adjustment may vibrate, etc. depending on the
operating conditions. Therefore, operate it after careful
examination of the flow rate, pressure and piping conditions.
3. In the LV
m
series, water hammering may occur
depending on the fluid pressure conditions. In most
cases, improvement is possible by adjusting the pilot
pressure with a speed controller, etc., but the flow rate,
pressure and piping conditions should be reviewed.
4.
To adjust the flow rate for the LV
m
series with flow rate
adjustment, open gradually starting from the fully closed
state.
Opening is accomplished by turning the adjustment knob
counterclockwise. Additionally, do not apply excessive
force to the adjustment knob when nearing a fully open or
closed state. This may result in deformation of the orifice
sheet surface or damage to the threaded portion of the
adjustment knob. It is in the fully closed state when the
product is shipped from the factory.
5. After a long period of nonuse, perform a test run
before beginning regular operation.
1. Removal of drainage
Flush drainage from filters regularly.
Caution
1. Do not use in a location having an explosive atmo
sphere.
2. Do not operate in locations where vibration or im
pact occurs.
3. Do not use in locations where radiated heat will be
received from nearby heat sources.
4. Do not use in environments which exceed the ambi
ent temperature specifications of the product.
Operating Environment
Warning
1. Use clean air.
Do not use compressed air which includes chemicals, syn
thetic oils containing organic solvents, salt, or corrosive gases,
etc., as this may cause damage or malfunction.
Operating Air Supply
Warning
Caution
1.
Operate within the ranges of the maximum operat
ing pressure and back pressure.
Handling
Warning
-5-
Warning
If the product to be returned is contaminated or is
possibly contaminated with substances that are harm-
ful to humans, for safety reasons, please contact SMC
beforehand and then employ a specialist cleaning
company to decontaminate the product. After the de-
contamination prescribed above has been carried out,
submit a Product Return Request Sheet or the Detoxi-
fication/Decontamination Certificate to SMC and await
SMC’s approval and further instructions before at-
tempting to return the item.
Please refer to the International Chemical Safety
Cards (ICSC) for a list of harmful substances.
If you have any further questions, please don’t hesi-
tate to contact your SMC sales representative.
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