Air Safety Valve
Mode lB WS

Expanded min. passage area of M3 and M5 thread models. Rc1/8 thread model newly added to the lineup.

Ultra-Compact and Light Air Pilot Check Valve
Suitable for cylinder position holding and workpiece fall prevention during robot transfer.

W e ig ht
M3 Thread Model

M5 Thread Model

Rc1/8 Thread Model

9 grams
14 grams
37 grams

PAT.P.

Bottom Surface
A PortEven when air is stopped due to blackout, the Air Safety Valve maintains air pressure
for long hours in a circuit. It is able to keep cylinder position and prevent workpiece fall.
It is also highly reliable with built-in Soft Seal.

BP

M od elBWSAAir Safety Valve637

The piston descends (falls)
due to air source shut-off.

Keeps the posture and prevents
falling by maintaining pressure.

Model No.
Indication

Application
ExampleFeatures

External
Dimensions

Speciﬁcations

Cautions

Locating

Application Example＋Clamp
Locating

Hand・Clamp

SupportControl Valve
Gripper

Valve・Coupler

model BWSAir Safety Valve

Cautions・Others

For Robot Transfer Hand
Air loss in couplers or pipes can be solved by setting

Air Safety Valvethe BWS closer to the gripper than the control valve.

BWSAirSequence Valve

Workpiece

BW D

0.6

Air Pressure

Auto Coupler

High Reliability with Soft Seal
Testing data of measuring elapsed time and pressurechange when maintaining air pressure in A port.
Sealing part is equipped with Soft Seal. It enables
great pressure maintaining ability.

Air Pressure (MPa)0.5

JT A /JT B
JT C /JT D

0.4

0.506MPa

JVC /JVD
JVE/JVF

0.20

Model No. Indication

JVA /JVB

0.3

JNA /JNB

Elapsed Time：50h
Decreased Pressure：0.012MPa

0.1※ Testing data of single product with stable surrounding temperature.

0.494MPa

0102030Time (h)40

JNC /JND
JLP/JLS

50

Leakless Coupler
JW C

Circuit Symbol
Rotary Joint

B WS 0 10 11JRIncoming SideP Port

21 Body Size

Outgoing SideA PortB : Pilot Port

03 ： Port Thread Size M3
05 ： Port Thread Size M5
10 ： Port Thread Size Rc1/8※※ The size of the pilot port is M5 thread.

2 Design No.
1： Revision Number

Specifications
Model No.

BWS0031

BWS0051

M3 Thread

M5 ThreadThread Size of Each PortmmOperating PressureMPa

0.2 ~ 0.7Withstanding Pressure

MPa

1.5

Min. Passage Area

※1mm2BWS0101
Rc1/8 Thread(The pilot port is M5 thread)

9.1

3.1

Cracking Pressure

MPa

0.03

Pilot Pressure

MPa

Outgoing Side (A Port) : Maintaining Pressure×0.5 or more

Operating Temperature℃

0 ~ 70Dry Air

Usable Fluid
Weightg

91437

Note :※1. It shows the minimum passage area in the product. Please consider passage area of joint and others when designing circuits.

638

Air Safety Valvem od e l B WS

External Dimensions：BWS0031(Unit：ｍｍ)

B：Pilot Port
M3×0.5

φ883.83917203P Port
M3×0.5

2-M3×0.5 Through Tapped Hole(For mounting：Tightening Torque 1.3N・m) 2.5

A PortM3×0.57122.51214

External Dimensions：BWS0051(Unit：ｍｍ)

B：Pilot Port

φ11

M5×0.8

10

5.2
5

9.7

19.7

23.5

3.8

P Port
M5×0.82-M3×0.5 Through Tapped Hole(For mounting：Tightening Torque 1.3N・m)
2.5

A Port
M5×0.89141415639

2.5

Features

Model No.
Indication

Application
ExampleSpeciﬁcations

External
Dimensions

Cautions

Locating

External Dimensions：BWS0101＋Clamp
Locating(Unit：ｍｍ)

B：Pilot Port
M5×0.8
3.5

P PortRc1/8

Hand・Clamp

φ11Support

7.5Cautions・Others

30

Air Safety Valve1533.5

15Valve・Coupler

7.5

BW S

2-M4×0.7 Through Tapped Hole(For mounting：Tightening Torque 3.2N・m)

3.5

15

3.5

Air
Sequence ValveA PortRc1/8

BWD

22Auto Coupler
JT A /JT B
JT C /JT D
JVA /JVB

24.5

JVC /JVD
JVE/JVFJNA /JNBJNC /JND

18

JLP/JLS

Leakless Coupler
JW C

Rotary Joint
JRCautions
1. When using with a speed controller, set it between BWS and an actuator.
2. Please supply filtered clean dry air.
Also, make sure no contaminants such as tips of sealing tape enter into the product as it affects a sealing ability.
Pressure cannot be maintained if contaminants stick to a check valve.
3. This product is for maintaining pressure, and cannot be used under vacuum.

※ Please refer to P.715 for common cautions.

・Notes on Handling・Maintenance/Inspection

・Warranty640

Cautions
Cautions● Notes on Handling● Maintenance and Inspection1) It should be operated by qualiﬁed personnel.

1) Removal of the Machine and Shut-oﬀ of Pressure Source● The hydraulic machine and air compressor should be operated● Before removing the product, make sure that the safety devices

and maintained by qualiﬁed personnel.

are in place. Shut oﬀ the pressure and power source and makesure no pressure exists in the air and hydraulic circuits.

2) Do not operate or remove the product unless the safety protocols
are ensured.

● Make sure there is no trouble/issue in the bolts and respective
parts before restarting.

① The machine and equipment can only be inspected or preparedwhen it is conﬁrmed that the safety devices are in place.

2) Regularly clean the area around the piston rod and plunger.

② Before the product is removed, make sure that the above-mentioned● If it is used when the surface is contaminated with dirt, it may

safety devices are in place. Shut oﬀ the pressure and power source,

lead to packing seal damage, malfunctioning, ﬂuid leakage.

and make sure no pressure exists in the air and hydraulic circuits.
③ After stopping the product, do not remove until the temperaturedrops.
④ Make sure there is no trouble/issue in the bolts and respective parts
before restarting the machine or equipment.
3) Do not touch a clamp (cylinder) while it is working.
Otherwise, your hands may be injured.

3) Regularly clean the reference surfaces (taper reference surface
and seating surface) of locating products (SWT/SWQ/SWP/VRA/
VRC/VX/VXE/VXF/WVS/VWH/VWM/VWK).
● Locating products (except VRA/VRC/VX/VXE/VXF and SWR without
air blow port) can remove contaminants with the cleaning function.
When installing a workpiece or a pallet, make sure there are no4) Do not disassemble or modify.
● If the equipment is taken apart or modiﬁed, the warranty will be
voided even within the warranty period.

contaminants such as thick sludge.
● Continuous use with dirt on components will lead to locating failure,ﬂuid leakage and malfunction.

4) Regularly tighten pipe, mounting bolt, nut, snap ring, cylinderand others to ensure proper use.
5) Make sure the hydraulic ﬂuid has not deteriorated.
6) Make sure there is a smooth action without an irregular noise.
● Especially when it is restarted after left unused for a long period,
make sure it can be operated correctly.
7) The products should be stored in the cool and dark place
without direct sunshine or moisture.
8) Please contact us for overhaul and repair.

715

Notes on Handling

Maintenance/Inspection

Warranty

Locating＋Clamp● Warranty

Locating

1) Warranty Period

Hand・Clamp● The product warranty period is 18 months from shipment fromour factory or 12 months from initial use, whichever is earlier.
2) Warranty Scope● If the product is damaged or malfunctions during the warranty
period due to faulty design, materials or workmanship, we will

SupportValve・Coupler

Cautions・Others

replace or repair the defective part at our expense.
Defects or failures caused by the following are not covered.
① If the stipulated maintenance and inspection are not carried out.
② Failure caused by the use of the non-conﬁrming state at the userʼsdiscretion.

Cautions
Installation Notes
Maintenance/
Inspection
Warranty③ If it is used or operated in an inappropriate way by the operator.
（Including damage caused by the misconduct of the third party.）④ If the defect is caused by reasons other than our responsibility.
⑤ If repair or modiﬁcations are carried out by anyone other than Kosmek,
or without our approval and conﬁrmation, it will void warranty.
⑥ Other caused by natural disasters or calamities not attributable toour company.
⑦ Parts or replacement expenses due to parts consumption andCompany Profile
Company Profile
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deterioration.
(Such as rubber, plastic, seal material and some electric components.)

Sales Offices

Damages excluding from direct result of a product defect shall beexcluded from the warranty.

716

Company Profile

Sales Offices
Sales Offices across the WorldJAPANHEAD OFFICE

Overseas Sales
United States of America

TEL. +81-78-991-5162

FAX. +81-78-991-8787

KOSMEK LTD. 1-5, 2-chome, Murotani, Nishi-ku, Kobe-city, Hyogo, Japan 651-2241〒651-2241

兵庫県神戸市西区室谷2丁目1番5号

FAX. +1-630-620-9015

SUBSIDIARY

TEL. +1-630-620-7650

KOSMEK (USA) LTD.

650 Springer Drive, Lombard, IL 60148 USA

MEXICOREPRESENTATIVE OFFICE

TEL. +52-1-55-3044-9983

KOSMEK USA Mexico Office

Av. Santa Fe 103, Int. 59, col. Santa Fe Juriquilla, Queretaro, QRO, 76230, Mexico

EUROPESUBSIDIARY

TEL. +43-463-287587

KOSMEK EUROPE GmbH

Schleppeplatz 2 9020 Klagenfurt am Wörthersee Austria

CHINA

TEL. +86-21-54253000

KOSMEK (CHINA) LTD.
考世美(上海)貿易有限公司

INDIA

FAX. +43-463-287587-20
FAX. +86-21-54253709

Room601, RIVERSIDE PYRAMID No.55, Lane21, Pusan Rd, Pudong Shanghai 200125, China
中国上海市浦东新区浦三路21弄55号银亿滨江中心601室 200125

BRANCH OFFICE

TEL. +91-9880561695

KOSMEK LTD - INDIA

4A/Old No:649, Ground Floor, 4th D cross, MM Layout, Kavalbyrasandra, RT Nagar, Bangalore -560032 India

THAILANDREPRESENTATIVE OFFICE

TEL. +66-2-300-5132

KOSMEK Thailand Representation Office

67 Soi 58, RAMA 9 Rd., Phatthanakan, Suanluang, Bangkok 10250, Thailand

TAIWAN

TEL. +886-2-82261860

Full Life Trading Co., Ltd.

16F-4, No.2, Jian Ba Rd., Zhonghe District, New Taipei City Taiwan 23511(Taiwan Exclusive Distributor)

FAX. +66-2-300-5133
FAX. +886-2-82261890

盈生貿易有限公司

台湾新北市中和區建八路2號 16F- 4（遠東世紀廣場）

PHILIPPINES(Philippines Exclusive Distributor)

TEL. +63-2-310-7286

G.E.T. Inc, Phil.

Victoria Wave Special Economic Zone Mt. Apo Building, Brgy. 186, North Caloocan City, Metro Manila, Philippines 1427

INDONESIA(Indonesia Exclusive Distributor)

TEL. +62-21-29628607

PT. Yamata Machinery

Delta Commercial Park I, Jl. Kenari Raya B-08, Desa Jayamukti, Kec. Cikarang Pusat Kab. Bekasi 17530 Indonesia

FAX. +63-2-310-7286
FAX. +62-21-29628608

Sales Offices in Japan
Head OfficeOsaka Sales Office
Overseas Sales
Tokyo Sales Office

Nagoya Sales Office

Fukuoka Sales Office

TEL. 078-991-5162〒651-2241

兵庫県神戸市西区室谷2丁目1番5号

TEL. 048-652-8839〒331-0815

FAX. 0566-74-8808

愛知県安城市美園町2丁目10番地1

TEL. 092-433-0424〒812-0006

FAX. 048-652-8828

埼玉県さいたま市北区大成町4丁目81番地

TEL. 0566-74-8778〒446-0076

FAX. 078-991-8787

FAX. 092-433-0426

福岡県福岡市博多区上牟田1丁目8-10-101

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Indonesia● FOR FURTHER INFORMATION ON UNLISTED SPECIFICATIONS AND SIZES, PLEASE CALL US.
● SPECIFICATIONS IN THIS CATALOG ARE SUBJECT TO CHANGE WITHOUT NOTICE.

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