PISCO RVV Series User manual

Small Regulator between Vacuum Valve and Vacuum Pad to Control Pressure
Small Vacuum Regulator Series
●Both source pressure and terminal pressure are
controllable.
●Suitable for controlling source pressure of small-type
vacuum pump.
●Install the regulator between vacuum valve and vacuum
pad in order to control pressure level of individual pad.
●Male thread type (A) is for direct connection to the
vacuum pump.
●Male thread type (B) is for direct connection to the
vacuum pad (pad dia.: ø 150 and 200mm).
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Small Vacuum Regulator Series
■ Model Designation (Example)
6RVV U
① Applicable Tube Size
② Type (flow direction)
Elastic sleeve (NBR)
Tube
Release ring (POM)
Lock claws (Stainless steel)
Leakage port (PVF)
Metallic body (Nickel-plated brass)
Guide ring (Stainless steel)
Small Vacuum Regulator Series
②
Type (fl ow direction)
①
Applicable Tube Size
■ Construction (Digital display / Union type)
Center disk A (Aluminum)
Pressure sensor
Lock nut (Nickel-plated brass)
■ Circuit
V
③
Pressure Indication
④
Bracket (for Elbow type only)
③ Pressure Indication
④ Bracket (for Elbow type only)
Control knob (Nickel-plated brass)
Bonnet (Nickel-plated brass)
Pressure adjusting screw (Nickel-plated brass)
O-ring (NBR)
Bracket (Nickel-plated brass)
Diaphragm (NBR)
Center disk B (Aluminum)
Rod packing (NBR)
Plastic body (PBT)
Valve (Nickel-plated brass)
Valve spring (Stainless steel)
Sleeve (Nickel-plated brass)
Plug (Nickel-plated brass)
Gasket (SUS304, NBR)
Gauge port (Nickel-plated brass)
Pressure adjusting spring (Piano wire)
Lock nut (Nickel-plated brass)
Spring guide (Nickel-plated brass)
Seal bush (Nickel-plated brass)
Code
O.D. (mm)
6
ø6mm
Code
Type
A
Elbow A (Fitting →Thread)
8
ø8mm
B
Elbow B (Thread →Fitting)
U
Union (Fitting →Fitting)
※Male thread size for elbow type is R1/4 only.
Code
Pressure Indication
G
Pressure indication (ø30mm negative pressure gauge)
V
Pressure indication (Digital pressure sensor with large display)
M
No pressure indication (with M5x0.8 female screw)
Code
Bracket
No code
No bracket
B
Bracket
※Union type(RVV □U□)is equipped with bracket as standard.

■ Specications of Regulator
■ Specications of Negative Pressure Gauge
■ Piping Arrangement Example
■
Vacuum supply
■Blow-off air
Vacuum pump
Vacuum Unit Controller VJP
Small Vacuum Regulator
Vacuum filter
Vacuum pad
Work-piece
Dry unit
Compressor
Vacuum pressure is controlled (pressure reduced)
Pressure indication
Fluid medium
Operating pressure range
Setting Pressure range
Flow rate
Operating temp. range
Air
(-100 ~ 100kPa)
(-100 ~ 0kPa)
(-100 ~ -1.3kPa)
(30l/min[ANR])
(0 ~ 50°C) No freezing
(0 ~ 40°C )No freezing
No pressure indication
Digital pressure sensor with large display
ø30mm negative pressure gauge
Indicated pressure range
Pressure indication accuracy
(-100 ~ 0kPa)
5%F.S.（at 25°C）
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-29.5 inHg ~ 14.5psi -29.5 inHg ~ 0 psi
-29.5 ~ -0.38 inHg
1.06 scfm
32 ~ 122 °F 32~104°F
-29.5 ~ 0 inHg

Small Vacuum Regulator Series
■ Pressure Sensor Specications
Spec.
Rated voltage
Current consumption
Operating pressure range
Pressure resistance
Storage temperature range
Operating temp. range
Operating humidity range
Protective structure
Display frequency
Response time
Indication accuracy
Temperature characteristic
Monitoring system
Pressure
indication Zero
point adjusting
function
Sensor resolution
Display element
Rated display range
No. of output pressure setting
Switch output
Switch capacity
Residual voltage
Pressure adjusting method
Switch
Pressure setting range
Output
Operation indicator
Accuracy of response
Operating accuracy
Response time
Hysteresis adjustment
Overload protection
VUS-30
Excessive rated pressure
Out of pressure detection range
Output overload detection
Adjusting error
1 digit
Two 1/2-digit, Height of Red LED display: 11mm
According to the following “Pressure Range”
(Unit is selectable from the list by panel control).
2 switch outputs (SW1, SW2)
NPN open collector
Max. DC30V 100mA
Max. 1.2V (load current: 100mA)
by panel control
-110 ~ 110digits (Decimal point is displayed as “Pressure Range”setting)
LED(SW1, SW2: RED) / Blinking (Output: ON)
±0.3F.S.
±0.5F.S. (0 ~ 50°C、Reference temperature: 25℃ )
Changeable by digital filter (About 5, 25 and 250m･sec)
0 ~ 30digits (Adjustable by panel switch)
2 switch outputs (SW1, SW2) OFF (overload current: about over 200mA or more)
Blinking display (Rated pressure: 110% or more)
Lower than negative pressure display: Blinking “-L-”/ Higher than positive pressure display: Blinking “-H-”
Applying overload current: Blinking “E1”
Zero point adjustment by panel control
More than ±0.06Pr of residual pressure remains in a pneumatic system
during Zero point adjustment: Blinking “E2”. Release it by panel control.
(-20 ~ 70°C) (Atmospheric pressure / Humidity: 60% RH or less)
(-10 ~ 50°C) No freezing
35 ~ 85%RH（No dew condensation）
Equivalent to IEC/IP40
4 times / sec.
Changeable by digital filter (About 5, 25 and 250m･sec)
±1%F.S.
±3%F.S. (0~50℃(Standard: 25℃ ) )
DC12-24V ±Ripple (P-P) Max. 10%
40mA or less
72.5psi (500kPa)
Pressure Range (Rated display range)
-100 ~ 100
–
-75 ~ 75
-1.00 ~ 1.00
-14.5 ~ 14.5
Display magnication (unit)
×1 (kPa)
×1 (MPa)
×0.75 (cmHg)
×0.01 (bar)
×0.145 (psi)
VUS-30
(-100 ~ 100kPa)-29.5 inHg ~ 14.5psi
14 ~ 122 °F
-4 ~ 158 °F
(32 ~ 122 °F)
(32 ~ 122 °F)

■ How to insert and disconnect
1. How to insert and disconnect tubes (Push-In Fitting)
①Tube insertion
Insert a tube into Push-In Fitting up to the tube end. Lock-claws bite the tube
and fix it automatically, then the elastic sleeve seals around the tube.
Refer to “2. Instructions for Tube Insertion”under “Common Safety Instructions
for Fittings”.
②Tube disconnection
The tube is disconnected by pushing release-ring to release Lock-claws.
Make sure to stop air supply before the tube disconnection.
2. How to tighten thread
①Tightening thread
Tighten the hexagonal-column with a proper tool within the tightening
torque range 12-14Nm.
Refer to the dimensional drawings for detail.
3. How to fix body with bracket
①Tightening screw
Use 2 holes on bracket to fix the body with M6 screws. Refer to the
dimensional drawings of the hole pitch.
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Small Vacuum Regulator Series
■ Adjusting Method of Vacuum Level
①. To raise vacuum level
Turn the pressure
adjusting screw to
the right from a fully
open state in order
to obtain a higher
vacuum level.
After adjusting the
desired vacuum
level, make sure
to tighten the
locknut in order to avoid deviating from the
setting.
②.
To lower vacuum level
When vacuum level
needs to be reduced,
turn the pressure
adjusting screw to
the left until vacuum
level drops less than
the required value.
Then carry out ① to
adjust the vacuum
level.
After adjusting the desired vacuum level,
make sure to tighten the locknut in order
to avoid deviating from the setting.
70
65
60
55
50
90 85 80 75 70 65
Primary pressure (-kPa)
Secondary pressure (-kPa)
A type
A type
A type
B and U type
B and U type
B and U type
■ Pressure Characteristic Curve
80
70
60
50
40
30
20
10
0
510 15 20 25 30 35
Flow rate (l/min(ANR))
Secondary pressure (-kPa)
A type
A type
A type
B and U type
B and U type
B and U type
■ Flow Characteristics
-13.3inHg
-14.8inHg
-16.2inHg
-17.7inHg
-19.2inHg
-20.7inHg
-26.6inHg -25.1inHg -23.6inHg -22.1inHg -20.7inHg -19.2inHg
Secondary pressure (-inHg)
Primary pressure (-inHg)
-3.0inHg
-14.8inHg
-17.7inHg
-20.7inHg
45
-11.8inHg
-8.9inHg
-5.9inHg
-0inHg
Secondary pressure (-inHg)
0.18scfm 0.35scfm 0.53scfm 0.71scfm 0.88scfm 1.88scfm 1.24scfm
Flow rate (scfm)
-23.6inHg

Detailed Safety Instructions
Before using PISCO products, be sure to read “Safety Instructions” and “Safety Instruction
Manual” and “Common Safety Instructions for Vacuum Series”.
Warning
1. Do not use a ø30mm pressure gauge for positive pressure. When positive pressure within the operating
range is supplied, use a Digital pressure sensor with large display. Excessive positive pressure may
cause damage to the product.
2. Before operating the product, thoroughly read users manual of Small Vacuum Regulator Series and
vacuum source side product. Carry out a trial operation.
Caution
1. Avoid an excessive load or impact on display, sensor and gauge port. Otherwise, there is a possibility of
damaging the product or dropping the indication accuracy.
2. Make sure to fix the product properly. Use a spanner to tighten a hexagonal-column (hex. 27mm) for
thread type. Do not tighten other place except the hexagonal-column, otherwise, it may cause damage to
the product.
3. When a gauge or a pipe is attached to gauge port, tighten a hexagonal-column (hex. 12mm) on the
port with a spanner. Refer to the following recommended tightening torque for tightening M5x8 port.
Otherwise, there is a possibility of damaging the product or dropping the indication accuracy.
■Table: Recommended tightening torque
Thread size Tightening torque
M5×0.8 1.0 ~ 1.5N·m
4.
If there is a possibility of sucking dusts or granule, be sure to place a filter on adjusting pressure side (work-
piece side) of Small Vacuum Regulator. Suction of these foreign substances may cause malfunctions.
5. Do not block the leak port and the relief port to maintain a stable secondary pressure.
6. When applying a positive pressure to Small Vacuum Regulator, a small amount of air comes out from the
leak port. Be careful when it is operated in cleanroom.
7. When applying a blow-off air, consider the air released from the leak port to set the blow-off air amount.
8. Do not use a pressure gauge in a large pressure fluctuation (high-cycle).
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Small Vacuum Regulator Series
■ Standard Size List
No pressure indication
Digital pressure sensor with large display
ø30mm negative pressure gauge
RVV RVV
RVV
Union
Elbow A Elbow B
Type VAC
side
SET side
6mm
R1/4 ●
Type VAC
side
Type VAC
side
6mm
8mm
8mm
●
SET side
R1/4
6mm
8mm
●
●
SET side
6mm
●
8mm
●
RVV RVV
RVV
Union
Elbow A Elbow B
Type VAC
side
SET side
6mm
R1/4 ●
Type VAC
side
Type VAC
side
6mm
8mm
8mm
●
SET side
R1/4
6mm
8mm
●
●
SET side
6mm
●
8mm
●
RVV RVV
RVV
Union
Elbow A Elbow B
Type VAC
side
SET side
6mm
R1/4 ●
Type VAC
side
Type VAC
side
6mm
8mm
8mm
●
SET side
R1/4
6mm
8mm
●
●
SET side
6mm
●
8mm
●

ø12
20
32
C
E
2-ø6.5
M5×0.8
Depth：3.5
21.125
2
Hex. 12
M16×1
Hex. 19
Hex. 12
Hex. 27
R1/4
ø22
7.753
4230.8
23
1113
øD
ø14.4
Max. 78
Min. 70.5
7.5
Relief port
Leak port
Bracket：MZB16
SET side
VAC side
50.6
25
25
2
Hex. 12
M16×1 Hex. 19
Hex. 12
Hex. 27
R1/4
ø22
7.753
4230.8
23
1113
Relief port
Leak port
ø12
20
32
□31
C
E
2-ø6.5
Digital sensor：VUS-30
øD
ø14.4
Max. 78
Min. 70.5
Bracket：MZB16
SET side
VAC side
RVV No pressure indication / Elbow A
RVV
Digital pressure sensor with large display / Elbow A
compliant
compliant
Unit：mm
Model
code
Tube O.D.
øD C E
Weight
(g)
RVV6AM □617 29 127
RVV8AM □818.1 28.9 128
Unit：mm
Model
code
Tube O.D.
øD C E
Weight
(g)
RVV6AV □617 29 193
RVV8AV □818.1 28.9 193
※Bracket is included with the above drawing.
※1. Bracket is included with the above drawing.
※2. Refer to handling method of digital sensor.
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Vacuum Accessories Series
Small Vacuum Regulator Series
41.7
16.5
25
2
Hex. 12
M16×1
Hex. 19
Hex. 27
R1/4
ø22
7.753
4230.8
23
1113
Relief port
Leak port
ø12
20
32
C
E
2-ø6.5
Gauge display：GPV30
øD
ø14.4
ø30
Max. 78
Min. 70.5
Bracket：MZB16
SET side
VAC side
RVV ø30mm negative pressure gauge / Elbow A
ø12
20
32
C
E
2-ø6.5
M5×0.8
Depth：3.5
21.125
2
Hex. 12
M16×1
Hex. 19
Hex. 12
Hex. 27
R1/4
ø22
7.753
4230.8
23
1113
øD
ø14.4
Max. 78
Min. 70.5
7.5
Relief port
Leak port
Bracket：MZB16
VAC side
SET side
RVV No pressure indication / Elbow B
compliant
compliant
Unit：mm
Model
code
Tube O.D.
øD C E
Weight
(g)
RVV6AG □617 29 156
RVV8AG □818.1 28.9 156
※Bracket is included with the above drawing.
Unit：mm
Model
code
Tube O.D.
øD C E
Weight
(g)
RVV6BM □617 29 127
RVV8BM □818.1 28.9 128
※Bracket is included with the above drawing.

50.6
25
25
2
Hex. 12
M16×1 Hex. 19
Hex. 12
Hex. 27
R1/4
ø22
7.753
4230.8
23
1113
Relief port
Leak port
ø12
20
32
□31
C
E
2-ø6.5
Digital sensor：VUS-30
øD
ø14.4
Max. 78
Min. 70.5
Bracket：MZB16
VAC side
SET side
RVV
Digital pressure sensor with large display / Elbow B
41.7
16.5
25
2
Hex. 12
M16×1
Hex. 19
Hex. 27
R1/4
ø22
7.753
4230.8
23
1113
Relief port
Leak port
ø12
20
32
C
E
2-ø6.5
Gauge display：GPV30
øD
ø14.4
ø30
Max. 78
Min. 70.5
Bracket：MZB16
VAC side
SET side
RVV ø30mm negative pressure gauge / Elbow B
compliant
compliant
Unit：mm
Model
code
Tube O.D.
øD C E
Weight
(g)
RVV6BV □617 29 193
RVV8BV □818.1 28.9 193
Unit：mm
Model
code
Tube O.D.
øD C E
Weight
(g)
RVV6BG □617 29 156
RVV8BG □818.1 28.9 156
※Bracket is included with the above drawing.
※1. Bracket is included with the above drawing.
※2. Refer to handling method of digital sensor.
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Vacuum Accessories Series
Small Vacuum Regulator Series
21.125
2
Hex. 12
M16×1
Hex. 19
Hex. 12
Hex. 27
ø23
7.757.3
4230.815
23
11
3.5
7.5
Relief port
Leak port
ø12
20
32
2-C
2-E
2-ø6.5
Hex. 21
M5×0.8
Depth：3.5
2-øD
2-ø14.4
Max. 81.8
Min. 74.3
Bracket：MZB16
VAC side
SET side
50.6
25
25
2
Hex. 12
M16×1
Hex. 19
Hex. 27
ø23
7.757.3
4230.815
23
11
3.5
Relief port
Leak port
ø12
20
32
2-C
2-E
2-ø6.5
Hex. 21
Digital sensor：VUS-30
2-øD
2-ø14.4
Max. 81.8
Min. 74.3
Bracket：MZB16
VAC side
SET side
□31
Hex. 12
RVV No pressure indication / Union
RVV Digital pressure sensor with large display / Union
compliant
compliant
Unit：mm
Model
code
Tube O.D.
øD C E
Weight
(g)
RVV6UM 617 29 180
RVV8UM 818.1 28.9 181
Unit：mm
Model
code
Tube O.D.
øD C E
Weight
(g)
RVV6UV 617 29 193
RVV8UV 818.1 28.9 193
※Refer to handling method of digital sensor.

(41.7)
16.5
25
2
Hex. 12
M16×1
Hex. 19
Hex. 27
ø23
7.757.3
4230.815
23
11
3.5
Relief port
Leak port
ø30
ø12
20
32
2-C
2-E
2-ø6.5
Hex. 21
Gauge display：GPV30
2-øD
2-ø14.4
Max. 81.8
Min. 74.3
Bracket：MZB16
VAC side
SET side
RVV 30mm negative pressure gauge / Union
compliant
Unit：mm
Model
code
Tube O.D.
øD C E
Weight
(g)
RVV6UG 617 29 156
RVV8UG 818.1 28.9 156
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Small Vacuum Regulator Series

Safety Instructions
SAFETY Instructions
Warning
This safety instructions aim to prevent personal injury and damage to
properties by requiring proper use of PISCO products.
Be certain to follow ISO 4414 and JIS B 8370
ISO 4414：Pneumatic fluid power…Recomendations for the application of equipment
to transmission and control systems.
JIS B 8370：
General rules and safety requirements for systems and their components.
This safety instructions is classified into “Danger”, “Warning” and “Caution” depending on
the degree of danger or damages caused by improper use of PISCO products.
1. Selection of pneumatic products
① A user who is a pneumatic system designer or has sufficient experience
and technical expertise should select PISCO products.
② Due to wide variety of operating conditions and applications for PISCO
products, carry out the analysis and evaluation on PISCO products.
The pneumatic system designer is solely responsible for assuring that
the user's requirements are met and that the application presents no
health or safety hazards. All designers are required to fully understand
the specifications of PISCO products and constitute all systems based
on the latest catalog or information, considering any malfunctions.
2. Handle the pneumatic equipment with enough knowledge and experience
① Improper use of compressed air is dangerous. Assembly, operation
and maintenance of machines using pneumatic equipment should be
conducted by a person with enough knowledge and experience.
3. Do not operate machine / equipment or remove pneumatic equipment until
safety is confirmed.
① Make sure that preventive measures against falling work-pieces or
sudden movements of machine are completed before inspection or
maintenance of these machine.
② Make sure the above preventive measures are completed. A
compressed air supply and the power supply to the machine must be
off, and also the compressed air in the systems must be exhausted.
③ Restart the machines with care after ensuring to take all preventive
measures against sudden movements.
Danger
Hazardous conditions. It can cause death or serious
personal injury.
Warning
Hazardous conditions depending on usages. Improper use of
PISCO products can cause death or serious personal injury.
Caution
Hazardous conditions depending on usages. Improper use of PISCO
products can cause personal injury or damages to properties.
※. This safety instructions are subject to change without notice.

Disclaimer
1. PISCO does not take any responsibility for any incidental or indirect
loss, such as production line stop, interruption of business, loss
of benefits, personal injury, etc., caused by any failure on use or
application of PISCO products.
2. PISCO does not take any responsibility for any loss caused by natural
disasters, res not related to PISCO products, acts by third parties, and
intentional or accidental damages of PISCO products due to incorrect
usage.
3. PISCO does not take any responsibility for any loss caused by improper
usage of PISCO products such as exceeding the specication limit or not
following the usage the published instructions and catalog allow.
4. PISCO does not take any responsibility for any loss caused by remodeling
of PISCO products, or by combinational use with non-PISCO products and
other software systems.
5. The damages caused by the defect of Pisco products shall be covered but
limited to the full amount of the PISCO products paid by the customer.
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Safety Instructions
SAFETY INSTRUCTION MANUAL
Danger
1. Do not use PISCO products for the following applications.
① Equipment used for maintaining / handling human life and body.
② Equipment used for moving / transporting human.
③ Equipment specifically used for safety purposes.
Warning
1. Do not use PISCO products under the following conditions.
① Beyond the specifications or conditions stated in the catalog, or the instructions.
② Under the direct sunlight or outdoors.
③ Excessive vibrations and impacts.
④ Exposure / adhere to corrosive gas, inflammable gas, chemicals, seawater, water and vapor. *
＊ Some products can be used under the condition above( ④ ), refer to
the details of specification and condition of each product.
2. Do not disassemble or modify PISCO products, which affect the
performance, function, and basic structure of the product.
3. Turn off the power supply, stop the air supply to PISCO products, and make sure
there is no residual air pressure in the pipes before maintenance and inspection.
4. Do not touch the release-ring of push-in fitting when there is a working pressure.
The lock may be released by the physical contact, and tube may fly out or slip out.
5. Frequent switchover of compressed air may generate heat, and there is a
risk of causing burn injury.
6. Avoid any load on PISCO products, such as a tensile strength, twisting
and bending. Otherwise, there is a risk of causing damage to the products.
7. As for applications where threads or tubes swing / rotate, use Rotary
Joints, High Rotary Joints or Multi-Circuit Rotary Block only. The other
PISCO products can be damaged in these applications.
8. Use only Die Temperature Control Fitting Series, Tube Fitting Stainless SUS316
Series, Tube Fitting Stainless SUS316 Compression Fitting Series or Tube Fitting
Brass Series under the condition of over 60℃ (140°F) water or thermal oil. Other
PISCO products can be damaged by heat and hydrolysis under the condition above.
9. As for the condition required to dissipate static electricity or provide an antistatic
performance, use EG series fitting and antistatic products only, and do not use other PISCO
products. There is a risk that static electricity can cause system defects or failures.
10. Use only Fittings with a characteristic of spatter-proof such as Anti-
spatter or Brass series in a place where flame and weld spatter is
produced. There is a risk of causing fire by sparks.
11. Turn off the power supply to PISCO products, and make sure there is
no residual air pressure in the pipes and equipment before maintenance.
Follow the instructions below in order to ensure safety.
① Make sure the safety of all systems related to PISCO products before maintenance.
② Restart of operation after maintenance shall be proceeded with care after
ensuring safety of the system by preventive measures against unexpected
movements of machines and devices where pneumatic equipment is used.
③ Keep enough space for maintenance when designing a circuit.
12. Take safety measures such as providing a protection cover if there is a
risk of causing damages or fires on machine / facilities by a fluid leakage.
PISCO products are designed and manufactured for use in general industrial
machines. Be sure to read and follow the instructions below.

Caution
1. Remove dusts or drain before piping. They may get into the peripheral
machine / facilities and cause malfunction.
2. When inserting an ultra-soft tube into push-in fitting, make sure to place
an Insert Ring into the tube edge. There is a risk of causing the escape of
tube and a fluid leakage without using an Insert Ring.
3. The product incorporating NBR as seal rubber material has a risk of
malfunction caused by ozone crack. Ozone exists in high concentrations
in static elimination air, clean-room, and near the high-voltage motors,
etc. As a countermeasure, material change from NBR to HNBR or FKM is
necessary. Consult with PISCO for more information.
4. Special option “Oil-free” products may cause a very small amount of a fluid
leakage. When a fluid medium is liquid or the products are required to be
used in harsh environments, contact us for further information.
5. In case of using non-PISCO brand tubes, make sure the tolerance of the
outer tube diameter is within the limits of Table 1.
●Table 1. Tube O.D. Tolerance
mm size Nylon tube Polyurethane tube inch size Nylon tube Polyurethane tube
ø1.8mm ─ ± 0.05mm ø1/8 ±0.1mm ±0.15mm
ø3mm ─ ±0.15mm ø5/32 ±0.1mm ±0.15mm
ø4mm ±0.1mm ±0.15mm ø3/16 ±0.1mm ±0.15mm
ø6mm ±0.1mm ±0.15mm ø1/4 ±0.1mm ±0.15mm
ø8mm ±0.1mm ±0.15mm ø5/16 ±0.1mm ±0.15mm
ø10mm ±0.1mm ±0.15mm ø3/8 ±0.1mm ±0.15mm
ø12mm ±0.1mm ±0.15mm ø1/2 ±0.1mm ±0.15mm
ø16mm ±0.1mm ±0.15mm ø5/8 ±0.1mm ±0.15mm
6. Instructions for Tube Insertion
① Make sure that the cut end surface of the tube is at right angle without
a scratch on the surface and deformations.
② When inserting a tube, the tube needs to be inserted fully into the push-
in fitting until the tubing edge touches the tube end of the fitting as
shown in the figure below. Otherwise, there is a risk of leakage.
Tube end
Sealing
Tube is not fully inserted up to tube end.
③ After inserting the tube, make sure it is inserted properly and not to be
disconnected by pulling it moderately.
※. When inserting tubes, Lock-claws may be hardly visible in the hole, observed
from the front face of the release-ring. But it does not mean the tube will
surely escape. Major causes of the tube escape are the followings;
①Shear drop of the lock-claws edge
②The problem of tube diameter (usually small)
Therefore, follow the above instructions from ① to ③ , even lock-claws
is hardly visible.
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Good Incomplete

7. Instructions for Tube Disconnection
①
Make sure there is no air pressure inside of the tube, before disconnecting it.
② Push the release-ring of the push-in fitting evenly and deeply enough to
pull out the tube toward oneself. By insufficient pushing of the release-
ring, the tube may not be pulled out or damaged by scratch, and tube
shavings may remain inside of the fitting, which may cause the leakage
later.
8. Instructions for Installing a fitting
① When installing a fitting, use proper tools to tighten a hexagonal-column
or an inner hexagonal socket. When inserting a hex key into the inner
hexagonal socket of the fitting, be careful so that the tool does not
touch lock-claws. The deformation of lock-claws may result in a poor
performance of systems or an escape of the tube.
② Refer to Table 2 which shows the recommended tightening torque. Do
not exceed these limits to tighten a thread. Excessive tightening may
break the thread part or deform the gasket and cause a fluid leakage.
Tightening thread with tightening torque lower than these limits may
cause a loosened thread or a fluid leakage.
③ Adjust the tube direction while tightening thread within these limits,
since some PISCO products are not rotatable after the installation.
●Table 2: Recommended tightening torque / Sealock color / Gasket
materials
Thread type Thread size Tightening torque Sealock color Gasket materials
Metric thread
M3 ×0.5 0.7N·m
─
SUS304
NBR
M5 ×0.8 1.0 ~ 1.5N·m
M6 ×1 2 ~ 2.7N·m
M3 ×0.5 0.5 ~ 0.6N·m
POM
M5 ×0.8 1 ~ 1.5N·m
M6 ×0.75 0.8 ~ 1N·m
M8 ×0.75 1 ~ 2N·m
Taper pipe thread
R1/8 7 ~ 9N·m
White ─
R1/4 12 ~ 14N·m
R3/8 22 ~ 24N·m
R1/2 28 ~ 30N·m
Unified thread No.10-32UNF 1.0 ~ 1.5N·m─SUS304、NBR
National pipe
thread taper
1/16-27NPT 7 ~ 9N·m
White ─
1/8-27NPT 7 ~ 9N·m
1/4-18NPT 12 ~ 14N·m
3/8-18NPT 22 ~ 24N·m
1/2-14NPT 28 ~ 30N·m
※ These values may differ for some products. Refer to each specification as well.
9. Instructions for removing a fitting
① When removing a fitting, use proper tools to loosen a hexagonal-column
or an inner hex bolt.
② Remove the sealant stuck on the mating equipment. The remained
sealant may get into the peripheral equipment and cause malfunctions.
10. Arrange piping avoiding any load on fittings and tubes such as twist,
tensile, moment load, shaking and physical impact. These may cause
damages to fittings, tube deformations, bursting and the escape of tubes.
Safety Instructions

Vacuum Generator Series
Vacuum Generator
Common Safety Instructions for Vacuum Series
Warning
Before selecting or using PISCO products, read the following instructions. Read the
detailed instructions for individual series.
1. If there is a risk of dropping work-pieces during vacuum suction, take a safety
measure against the falling of them.
2. Avoid supplying more than 0.1MPa pressure constantly in a vacuum circuit.
Since vacuum generators are not explosive-proof, there is a risk of damaging
the products.
3. Pay attention to drop of vacuum pressure caused by problems of the supplied
air or the power supply. Decrease of suction force may lead to a danger
of falling work-piece so that safety measure against the falling of them is
necessary.
4. When more than 2 vacuum pads are plumbed on a single ejector and one of
them has a suction problem such as vacuum leak, there is a risk of releasing
work-pieces from the other pad due to the drop of the vacuum pressure.
5. Do not use in the way by which exhaust port is blocked or exhaust resistance
is increased. Otherwise, there is a risk of no vacuum generation or a drop of
the vacuum pressure.
6. Do not use the product in the circumstance of corrosive gas, inflammable
gas, explosive gas, chemicals, seawater and vapor or do not expose the
product to those. Never allow the product to suck those things.
7. Provide a protective cover on the products when it is exposed to sunlight.
8. Carry out clogging check for silencer element in an ejector and a vacuum
filter periodically. Clogged element will be a cause to impair the performance
or a cause of troubles.
9. Before replacing the element, thoroughly read and understand the method of
filter replacement in the catalog.
10. Make sure the correct port of the vacuum generator by this catalog or
marking on the products when plumbing. Wrong plumbing can be a risk to
damage the product.
11. Supply clean air without sludge or dusts to an ejector. Do not lubricate by a
lubricator. There is a risk of malfunction or performance impairing by impurities
and oil contained in the compressed air.
12. Do not apply extreme tension, twist or bending forces on a lead wire.
Otherwise, it may cause a wire breaking.
13. Locknut needs to be tightened firmly by hand. Do not use any tool to tighten.
In case of using tools to tighten the locknut, it may damage the locknut or the
product. Inadequate tightening may loosen the locknut and the initial setting
can be changed.
14. Do not force the product to rotate or swing even its resin body is rotatable. It
may cause damage to the product and a fluid leakage.
15. Do not supply an air pressure or a dry air to the products over the necessary
amount. There is a risk of deteriorating rubber materials and malfunction due
to oil.
16. Keep the product away from water, oil drops or dusts. These may cause
malfunction. Take a proper measure to protect the product before the
operation.