SMC Networks VHS20 Series User manual

Doc. no.VH*-OMG0036
PRODUCT NAME
RESIDUAL PRESSURE EXHAUST 3 PORT VALVE
MODEL / Series / Product Number
VHS20-(F,N)01～02(-B,R,Z)
VHS30-(F,N)02～03(-B,R,Z)
VHS40-(F,N)02～04(-B,R,Z)
VHS40-(F,N)06(-B,R,Z)
VHS50-(F,N)06～10(-B,R,Z)

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Contents
PAGE
1. PRECAUTIONS FOR SAFETY 3 ～ 6
2. APPLICATION 7
3. SPECIFICATIONS 7
4. HOW TO ORDER 8
5. CONSTRUCTION ／ PARTS LIST 9
6. OUTLINE DIMENSIONS 10

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RESIDUAL PRESSURE EXHAUST
3 PORT VALVE
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 International Standards
(ISO/IEC) *1) , 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.
Caution
Caution indicates a hazard with a low level of risk which, if not avoided, could result
in minor or moderate injury.
Warning
Warning indicates a hazard with a medium level of risk which, if not avoided, could
result in death or serious injury.
Danger
Danger indicates a hazard with a high level of risk which, if not avoided, will result
in death or serious injury.
Warning
1. 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 catalog information, with
a view to giving due consideration to any possibility of equipment failure when configuring the equipment.
2. Only personnel with appropriate training should operate machinery and equipment.
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.
3. Do not service or attempt to remove product and 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.
4. 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, combustion 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 specifications described in the product catalog.
3. An application which could have negative effects on people, property, or animals requiring special safety
analysis.
4.Use in an interlock circuit, which requires the provision of double interlock for possible failure by using a mechanical

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protective function, and periodical checks to confirm proper operation.
RESIDUAL PRESSURE EXHAUST
3 PORT VALVE
Safety Instructions
Caution
1.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.
Limited warranty and Disclaimer/Compliance Requirements
The product used is subject to the following “Limited warranty and Disclaimer” and “Compliance
Requirements”.
Read and accept them before using the product.
Limited warranty and Disclaimer
1.The warranty period of the product is 1 year in service or 1.5 years after the product is delivered
Also, the product may have specified durability, running distance or replacement parts. Please
consult your nearest sales branch.
2. For any failure or damage reported within the warranty period which is clearly our responsibility,
a replacement product or necessary parts will be provided.
This limited warranty applies only to our product independently, and not to any other damage
incurred due to the failure of the product.
3. Prior to using SMC products, please read and understand the warranty terms and disclaimers
noted in the specified catalog for the particular products.
Compliance Requirements
1. The use of SMC products with production equipment for the manufacture of weapons of mass
destruction (WMD) or any other weapon is strictly prohibited.
2. The exports of SMC products or technology from one country to another are governed by the
relevant security laws and regulation of the countries involved in the transaction. Prior to the
shipment of a SMC product to another country, assure that all local rules governing that export
are known and followed.

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Design
! Warning
① Please consult with SMC in cases where the ambient environment does not permit leakage
or if fluid other than air is used.
② When exhaust piping is connected to the exhaust port (3), select a model with an effective
sectional area not smaller than that in the table below.
③ Do not apply negative pressure. It may result in malfunction.
Selection
! Warning
1 In some cases, mineral oil grease used for internal parts and sealant may be carried to the
output side.
Please contact SMC if this causes any inconvenience in use.
Installation and Adjustment
! Warning
1 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:
! Caution
1 The valve must be switched to each position instantly and securely.
Stopping the knob between the extreme positions may cause malfunction.
2 Do not remove the mounting screws from the knob because this may cause malfunction.
Model Effective area mm
2
(Cv )
VHS20 5 (0.27)
VHS30 5 (0.27)
Port Symbol Piping type
1 Inlet
2 Outlet
3 Exhaust

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Piping
! Warning
.
1. Before piping is connected, the pipes should be thoroughly blown through with air (flushing) or
washed to remove chips, cutting oil and other debris from inside. Should they remain, they could
cause malfunction.
2. When connecting pipes and fittings, etc., ensure that neither chips from the pipe threads nor
sealing material get inside the valve. When using sealant tape, leave 1.5 to 2 thread ridges exposed
at the end of the pipe/fitting.
3. When screwing a piping component into the valve, secure the female threaded side and apply the
recommended tightening torque. Under tightening may result in loosening or sealing failure while
over tightening may cause damage to threads and other problems.
Recommended tightening torque Unit ： N ・ｍ
Connection
thread
１／８ １／４ ３／８ １／２ ３／４ １
Torque 7
～ 9 12 ～ 14 22 ～ 24 28 ～ 30 28 ～ 30 36 ～ 38
Air Supply
! Warning
1. 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.
2. 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.
! Caution
1. Install an air filter of 5 µm filtration on the inlet side.
2. 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.
Refer to SMC’s “Air Cleaning Equipment” catalog for further details on compressed air quality.
Operating Environment
! Warning
① Do not use valves where there is direct contact with, or in atmospheres of, corrosive gases,
chemicals, salt water, water or steam.
② Do not use in an explosive atmosphere.
③ Do not use in locations subject to vibration or impact.
Confirm the specifications for each series.
④ A protective cover should be used to shield valves from direct sunlight.
⑤ Shield valves from radiated heat generated by nearby heat sources.
⑥ Employ suitable protective measures in locations where there is contact with water droplets,
oil, or welding spatter.

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⑦ Install a silencer into port (3) to prevent the ingress of dust if there is a lot of dust in the
atmosphere. If dust enters the valve via port (3), it may cause air leakage.

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Maintenance
! Warning
1. Perform maintenance procedures as shown in the instruction manual. If handled improperly,
malfunction or damage of machinery or equipment may occur.
2. Do not disassemble the product. Improper handling will cause malfunction or breakage of the
machinery or equipment.
3. When equipment is to be removed, first confirm that measures are in place to prevent dropping of
driven objects and run-away of equipment, etc. Then cut the supply air pressure and electric power,
and exhaust all compressed air from the system using its residual pressure release function.
When the equipment is to be started again after remounting or replacement, first confirm that
measures are in place to prevent lurching of actuators and then confirm that equipment
operates normally.
! Caution
1 Once a lubricant is introduced, be sure to continue lubrication. If it is discontinued, malfunction
may result due to loss of the initial lubricant. Apply class 1 turbine oil (ISO VG32) as a lubricant. Use
of other lubricants may cause malfunction.
2 ． APPLICATION
This valve is 3 port valve is intended to exhaust residual pressure by manual operation.
3 ． SPECIFICATIONS
Model VHS20 VHS30 VHS40 VHS40-06 VHS50
IN, OUT 1/8 1/4 1/4 3/8 1/4 3/8 1/2 3/4 3/4 1
Port size
EXH. 1/8 1/4 3/8 1/2 1/2
IN→OUT 0.54 0.76 0.87 1.68 1.46 2.06 2.98 4.17 4.44 6.78
Cv
OUT→EXH. 0.60 0.87 0.76 1.57 1.75 2.08 2.12 2.12 2.85 2.93
Fluid Air
Proof pressure 1.5MPa
Operating pressure range 0.1
～ 1.0MPa
Ambient and fluid temperature -5
～ 60 ℃（ No freezing ）
Handle rotating angle
９０ °
Painted color
Note
）
Handle ： Red, Body ： Platinum silver
Weight 0.19kg 0.25kg 0.35kg 0.42kg 0.77kg
Note ） Handle ： Black and Body ： Platinum silver is available as semi-standard. （ Model ： VHS*-*-B ）

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4 ． HOW TO ORDER
VHS 30 – F 02 - RZ
Residual pressure ● ● Semi-standard
exhaust. 3 port valve Symbol Content
B Handle:Black
R Flow direction:
Body size ● Right to Left
20 1/8
*1
Z PSI as unit displayed on label
30 3/8
40 1/2
50 3/4
Thread type ● ● Port size
NIL Rc Symbol Size Applicable model
N NPT 01 1/8 VHS20
F G 02 1/4 VHS20,30,40
03 3/8 VHS30,40
04 1/2 VHS40
06 3/4 VHS40,50
10 1 VHS50
A spacer is required if the valve is combined with modular
Residual
pressure
exhaust.
3 port valve
Spacer Spacer with bracket Applicable air
preparation equipment
VHS20 Y200 Y200T AC20*
VHS30 Y300 Y300T AC25*, AC30*
VHS40 Y400 Y400T AC40*
VHS40-06 Y500
Y500T AC40*-06
VHS50 Y600 Y600T AC50*
*1) Only for the NPT thread.
Under the New Measurement Law,
products for overseas use only
(SI unit type for use in Japan)

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5
． CONSTRUCTION ／ PARTS LIST
VHS20/30 VHS40/40-06/50
Parts list
Material
No. Description VHS20 VHS30 AR40(-06), 50 Remark
① Body Zinc die cast Aluminum die cast Aluminum die cast Painted platinum silver.
② Handle Zinc die cast Aluminum die cast Painted red.
③ Valve guide Zinc die cast －
④ Valve Aluminum alloy ＋ HNBR －
⑤ Piston Brass －
⑥ Cam ring － Zinc die cast
⑦ Ferrule － POM
⑧ Spool － Brass Nickel chromate
⑨ Seal － HNBR

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6 ． OUTLINE DIMENSIONS
VHS20/30 VHS40/40-06/50
Outline dimensions
Model Port size
Ａ Ｂ Ｃ Ｄ Ｅ Ｆ Ｇ Ｈ Ｉ
VHS20 1/8
・ 1/4 59 20 40 34 － 45 33 28 45
VHS30 1/4
・ 3/8 78 29 53 46 － 55 42 30 55
VHS40 1/4
・ 3/8 ・ 1/2
107 39 70 63 22 58 44 36 63
VHS40-06 3/4 110 42 75 67 21 65 50 44 69
VHS50 3/4
・１ 134 53 90 78 26 76 61 54 81
Padlock mounting position
Padlock mounting position

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Revision history
4-14-1, Sotokanda, Chiyoda-ku, Tokyo 101-0021 JAPAN
Tel: + 81 3 5207 8249 Fax: [phone]
URL http://www.smcworld.com
Note: Specifications are subject to change without prior notice and any obligation on the part of the manufacturer.
© 2008 SMC Corporation All Rights Reserved