SMC Networks VHS 0-A Series Instruction Manual

VHS-SMU28EN
ORIGINAL INSTRUCTIONS
Instruction Manual
Pressure Relief 3 Port Valve with Locking Holes (Single
Action)
Series VHS#0-A and VHS#0-B
The intended use of this valve is to release residual pressure by switching
the valve by hand.
Validated according to ISO 13849, see section 2 and section 5.
1 Safety Instructions
These safety instructions are intended to prevent hazardous situations
and/or equipment damage. These instructions indicate the level of potential
hazard with the labels of "Caution", "Warning" or "Danger".
They are all important notes for safety and must be followed in addition to
*1)
International Standards (ISO/IEC) , and other safety regulations.
*1)
ISO 4414: Pneumatic fluid power - - General rules relating to systems.
ISO 4413: Hydraulic fluid power - - General rules relating to systems.
IEC 60204-1: Safety of machinery - - Electrical equipment of
machines. (Part 1: General requirements)
ISO 10218-1: Manipulating industrial robots -Safety. etc.
This manual contains essential information for the protection of users and
others from possible injury and/or equipment damage.
 Read this manual before using the product, to ensure correct handling,
and read the manuals of related apparatus before use.
 Keep this manual in a safe place for future reference.
 To ensure safety of personnel and equipment the safety instructions in
this manual must be observed, along with other relevant safety
practices.
Caution indicates a hazard with a low level of risk
Caution which, if not avoided, could result in minor or
moderate injury.
Warning indicates a hazard with a medium level
Warning
of risk which, if not avoided, could result in death
or serious injury.
Danger indicates a hazard with a high level of risk
Danger which, if not avoided, will result in death or
serious injury.
Warning
 The compatibility of the product is the responsibility of the person
who designs the equipment or decides its specifications.
 Since the product specified here is used under various operating
conditions, its compatibility with specific equipment must be decided by
the person who designs the equipment or decides its specifications
based on necessary analysis and test results. The expected
performance and safety assurance of the equipment will be the
responsibility of the person who has determined its compatibility with the
product. This person should also continuously review all specifications of
the product referring to its latest catalogue information, with a view to
giving due consideration to any possibility of equipment failure when
configuring the equipment.
 Only personnel with appropriate training should operate machinery
and equipment.
1 Safety Instructions - continued
The product specified here may become unsafe if handled incorrectly.
The assembly, operation and maintenance of machines or equipment
including our products must be performed by an operator who is
appropriately trained and experienced.
 Do
not service or attempt to remove product
machinery/equipment until safety is confirmed.
1) The inspection and maintenance of machinery/equipment should only
be performed after measures to prevent falling or runaway of the driven
objects have been confirmed.
2) When the product is to be removed, confirm that the safety measures
as mentioned above are implemented and the power from any
appropriate source is cut, and read and understand the specific product
precautions of all relevant products carefully.
3) Before machinery/equipment is restarted, take measures to prevent
unexpected operation and malfunction.
 Contact SMC beforehand and take special consideration of safety
measures if the product is to be used in any of the following
conditions.
1) Conditions and environments outside of the given specifications, or
use outdoors or in a place exposed to direct sunlight.
2) Installation on equipment in conjunction with atomic energy, railways,
air navigation, space, shipping, vehicles, military, medical treatment,
combustions and recreation, or equipment in contact with food and
beverages, emergency stop circuits, clutch and brake circuits in press
applications, safety equipment or other applications unsuitable for the
standard specification described in the product catalogue.
3) An application which could have negative effects on people, property,
or animals requiring special safety analysis outside the scope of ISO
13849 described in this document.
4) Use in an interlock circuit, which requires the provision of double
interlock for possible failure by using a mechanical protective function,
and periodical checks to confirm proper operation.
 Always ensure compliance with relevant safety laws and standards.
 All electrical work must be carried out in a safe manner by a qualified
person in compliance with applicable national regulations.
Caution
 The product is provided for use in manufacturing industries.
The product herein described is basically provided for peaceful use in
manufacturing industries.
If considering using the product in other industries consult SMC
beforehand and exchange specifications or a contract if necessary.
If anything is unclear, contact your nearest sales branch.
2 Specifications
2.1 Specifications
Model VHS20 VHS30 VHS40 VHS40-06 VHS50
Fluid Air
Min. air quality 5 µm filtration
Ambient and fluid
-5 to +60 °C (No freezing)
temperature
Proof pressure 1.5 MPa
Min. operating pressure 0.1 MPa
Max. operating pressure 1.0 MPa
Handle switching angle 90°
Handle: Red
Paint colour (Standard)
Body: White
Weight for –A series
76 g 127 g 247 g 293 g
Weight for –B series
92 g 156 g 301 g 349 g
Flow See Table 2
Lubrication Not required (Refer to 3.4)
Complies with the basic
and well-tried safety
–
Standards
principles of EN ISO 13849-
2:2012
–
B 7,400 cycles
10
–
B 14,800 cycles
10d
Table 1
2 Specifications – continued
Notes:
Note 1) Under SMC test conditions. The B figure is estimated from SMC
10
life tests. The B figure is derived from B
10D
in EN ISO 13849-1:2015 Annex C. Contact SMC for details.
and
2.2 Flow characteristics
IN  OUT
Port size
Model
IN, C
EXH b Cv
3
OUT [dm /(s∙bar)]
1/8 2.4 0.43 0.65
VHS20 1/8
1/4 3.3 0.40 0.88
1/4 6.4 0.45 1.7
VHS30 1/4
3/8 8.3 0.41 2.3
1/4 7.3 0.49 2.0
VHS40 3/8 3/8 10.9 0.45 3.0
1/2 14.2 0.39 3.8
VHS40-
3/4 1/2 18.3 0.31 5.0
06
3/4 23.8 0.41 6.4
VHS50 1/2
1 31.9 0.33 8.6
Table 2
2.3 Indicator window
The supply/exhaust status of the air flow can be verified at a glance in the
indicator window.
Caution
Special products might have specifications different from those shown in
this section. Contact SMC for specific drawings. These drawings will give
the appropriate specification details and compliance with the safety
principles of ISO 13849, if applicable.
3 Installation
3.1 Installation
Warning
 Do not install the product unless the safety instructions have been read
and understood.
 Confirm the symbols "1" and "2" before the valve is connected. The port
marked "1" is the air inlet and the port marked "2" is the outlet.
Pressurization is only possible via the inlet port "1". Reverse connection
may cause malfunction. The port symbols and corresponding piping
types are shown in the table below.
Port symbol Piping type
1 Inlet
2 Outlet
3 Exhaust
532 g
Table 3
630 g
Caution
 The valve must be switched to each position instantly and securely.
Stopping the knob between the extreme positions may cause
malfunction.
 Do not remove the mounting screws from the bonnet. This may cause
malfunction.
Note 1)
3.2 Environment
Note 1)
Warning
 Do not use in an environment where corrosive gases, chemicals, salt
water or steam are present.
3 Installation – continued
 Do not use in an explosive atmosphere.
 Do not expose to direct sunlight. Use a suitable protective cover.
using the assumption  Do not install in a location subject to vibration or impact. Check the
10
product specifications.
 Do not mount in a location exposed to radiant heat.
 Consult SMC if the ambient environment does not permit leakage.
OUT  EXH
 Employ suitable protective measures in locations where there is contact
C
with water droplets, oil, or welding spatter.
b Cv
3
[dm /(s∙bar)]
 Install a silencer into port (3) to prevent the ingress of dust if there is a lot
2.5 0.39 0.69
of dust in the atmosphere. If dust enters the valve via port (3), it may
3.1 0.51 0.84
cause air leakage.
6.2 0.38 1.7
7.0 0.41 1.9
3.3 Piping
8.5 0.35 2.3
11.6 0.40 3.1
 Before piping make sure to clean up chips, cutting oil, dust etc.
13.3 0.43 3.6
 When installing piping or fittings, ensure sealant material does not enter
17.7 0.37 4.8
inside the port. When using seal tape, leave 1.5 to 2 threads exposed on
the end of the pipe/fitting.
21.8 0.41 5.9
 Tighten fittings to the specified tightening torque.
23.5 0.44 6.4
Thread 1/8 1/4
Tightening
7 to 9 12 to 14
Torque [N∙m]
3.4 Lubrication
 SMC products have been lubricated for life at manufacture, and do not
require lubrication in service.
 If a lubricant is used in the system, use turbine oil Class 1 (no additive),
ISO VG32. Once lubricant is used in the system, lubrication must be
continued because the original lubricant applied during manufacturing
will be washed away.
3.5 Air Supply
 Use clean air. Do not use compressed air which contains chemicals,
synthetic oils containing organic solvents, salts or corrosive gases, etc.,
as this can cause damage or malfunction.
 Install an air dryer or after cooler on the upstream side of the pressure
release 3 port valve because air containing excessive drainage may
cause malfunction.
 Do not apply negative pressure. It may result in malfunction.
 Install a mist separator on the inlet side to remove carbon powder from
the compressor or other equipment. An excessive amount of carbon dust
ingress via the inlet may cause the valve to malfunction.
Warning
3/8 1/2 3/4 1
22 to 24 28 to 30 28 to 30 36 to 38
Table 4
Caution
Warning
Caution
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