
Design
Warning
Pump Relief valve
5. Fluid pressure
Feeding the fluid from the suction side into the pump with
pressure or drawing it with negative pressure will cause
reverse pressure to be applied to the diaphragm, causing
shortening of the product life.
6. Ensure space for maintenance.
Secure the space required for maintenance and inspection.
Take into consideration also leakage from the product. When
transferring a flammable liquid or a liquid that may affect the
human body or environment, take measures including fire ban
and keeping the area off limits.
7. Use a design which prevents reverse pressure and
reverse flow.
If reverse pressure or flow occurs, this can cause equipment damage
or malfunction, etc. Take safety measures in designing the circuit.
8. Measures against static electricity
Take measures against static electricity as static electricity
may occur depending on the fluid.
9. The pump cannot transfer gas. Do not allow it to
idle for a long time.
If the pump is operated for a long time without any fluid inside,
the diaphragm may be damaged or the life may be shortened.
Do not continue idling for 3 minutes or longer.
10. Built-in solenoid valve
Refer to “Handling Precautions for SMC Products” (M-E03-3)
for the usage of the solenoid valve.
Piping
Caution
1. Flush the piping.
Flush and clean the piping before connecting the product. Any
dirt or scale and the like left in the piping may cause malfunc-
tion or failure.
2. The port thread material of PB series is resin. Use a
fitting with a resin thread for piping the fitting.
3. Tighten screws with proper tightening torque.
When screwing fittings into the product, tighten them with
proper tightening torque as shown below. Over-tightening can
damage the thread.
Connection thread
Series PB1000A
Proper tightening torque (N·m)
Rc, NPT, G 1/8 0.8 to 1
Connection thread
Series PB1313A
Proper tightening torque (N·m)
Rc, NPT, G 1/8 1.5 to 2
Air Supply
Warning
1. Use clean air.
Do not use compressed air that includes chemicals, synthetic
oils containing organic solvents, salinities or corrosive gases,
etc., as it can cause damage or malfunction.
2. Pay attention to avoid freezing when operating the
product in low temperatures.
The equipment operates while expanding the compressed air.
During this time, the temperature inside the product decreases
due to adiabatic expansion. If the ambient temperature is low,
using compressed air containing a lot of moisture may cause
freezing because heat cannot be gained from the surround-
ings. In this case, take freeze prevention measures with a
membrane air dryer (such as IDG series).
Series PB
Specific Product Precautions 1
Be sure to read this before handling. Refer to back cover for Safety Instructions. Read
the “Operation Manual” carefully before use to understand the outline of the product
and issues relating to safety. The Operation Manual can be downloaded from the SMC
website: http://www.smcworld.com/
11. Condensation and freeze of the pilot port
The built-in solenoid valve type air exhaust port and
air-operated type air supply port can be cooled down quickly
due to expansion of the supply air, and this may cause
condensation on the piping and the condensation may freeze
during operation in winter. Take measures to ensure that
water droplets from condensation are not splashed onto any
electric parts or equipment.
Caution
1. Quality of pilot air
•
Be sure to use only air filtrated by a micro mist separator (such
as AMD series). Use of a super mist separator (such as AME
series) is recommended to extend maintenance intervals.
• Use of humid air may cause condensation inside the body.
Use air which has been treated by a refrigerated air dryer
(such as IDF series).
• If a pump is operated by dried air and N2gas, etc., the
deterioration of the inner gaskets will be accelerated and
may result in substantially shortening of the product life.
1. Check the specifications.
Give careful consideration to operating conditions such as the
application, fluid and environment, and use the product within
the operating ranges specified in this catalogue.
2. Fluids
• For the compatibility between the materials composing the
product and the fluids, check the compatibility check list.
Since the compatibility of the fluid used may vary depending
on its type, additives, concentration, temperature, etc., give
sufficient consideration when selecting the material.
•
For fluids other than those listed in the check list, please consult SMC.
Also, use them within the range of the operating fluid temperatures.
• If foreign matter is mixed in the fluid, these may cause
abrasion of the inside of the pump resulting in a problem.
Use an appropriate filter (strainer) to remove them. In
general, 80 to 100 mesh (150 to 180 μm) filters are recom-
mended.
• When transferring a coagulable liquid, take measures to
prevent it from coagulating in the pump.
• Flammable fluid cannot be used with the process pump with
built-in solenoid valve (PB1011A). Do not use in an environ-
ment where flammable fumes are present or where
flammable liquid may get stuck to the product.
•
Take measures so that the pump body is not exposed to liquid.
3. Water hammer
If a valve is operated abruptly etc., a high pressure may be
applied due to water hammer. Take measures to prevent
pressures higher than specified from being applied.
<Examples of measures>
• Use a water hammer resistant valve to reduce the valve
closing speed.
• Use an elastic piping material such as rubber hose or an
accumulator to absorb the impact pressure.
4. Liquid seals
Provide a relief valve in the system to
prevent it from becoming a liquid-sealed
circuit.
Countermeasures against
liquid-sealed circuit
15