UHP Valves, Fittings & System Integration

CVC-LC Series
CVC Fitting Lock Assist®

Lock Assist® CVC-LC Series Debut*Lock Assist® is a registered trademark of KITZ SCT Corporation.

‒ As a measure to prevent loosening due to vibration during transportation ofsemiconductor material containers‒ As a measure to help prevent disasters due to earthquakes aﬀecting factory piping
facilities‒ As a measure to prevent gas leakage from occurring due to operational mistakes

Features
Ease of use
Due to Lock Assist's structure of tightening with one bolt, detaching/attaching is possible even afterinstallation.
Also, since there is no interference with the leak test port, leak tests are easily conducted even aftermounting.

Reliable tightening force
Due to our unique structure by which the bolt, when tightened, turns in the direction that tightens theﬁtting, thus, there is no loosening of the ﬁtting due to the mounting method.

Assembly Procedure
This product is designed for compatible types of our CVC ﬁttings and our valve series.
During Lock Assist installation make sure to have read the instruction manual for correct and safe use.

For ﬁtting Size: 1/4”, 1/2”

1) Mount the male Lock
Assist component.

2) Mount the female Lock
Assist component.

3) After checking theclearance A
dimensions*1, tighten
the bolt at the speciﬁed
torque*2.

For valve Size: 1/4”

*1 Clearance A
dimension- Recommended value
before tightening
1/4”: 4 ‒ 11 mm
1/2”: 5 ‒ 13 mm- After tightening
1/4”, 1/2”:
Minimum of 1.5mm
Clearance A*2 Speciﬁed torque1/4”: 0.75 N·m
1/2”: 1.0 N·m1) Mount the valve Lock
Assist component.

2) Mount the female Lock
Assist component.

3) After checking theclearance A dimensions*1,tighten the bolt at thespeciﬁed torque*1.

Speciﬁcations
Component name

MaterialFemale Lock Assist component

SCS13

2Male Lock Assist component

SCS13

3Valve Lock Assist component

SCS13

1

For ﬁtting(1/4”, 1/2”)

Maximum operating
temperature
1/4″

SUSXM7

Rosette washer

SUS304-CSP

6E-ring

SUS304-CSP

For machined male
body of valve
200 ℃ *

1/2″

Anti-drop bolt*

5* Bolt size and hexagon wrench size to be used
1/4”: M4, hexagon socket size 3mm1/2”: M5, hexagon socket size 4mm

For integral male body of valve(1/4”)

For ﬁtting

4Item

Speciﬁcation

Surface spec

Electropolishing

Cleaning

Degreasing

Environment after cleaning

General environment

Packaging bagSingle* Note that heating at the maximum operating temperature or more may
cause galling of the bolt and Lock Assist component.

TypeModelSize

Variety 1

Variety 2CVC4LCJ

CVC
Metal Gasket Surface
Seal Fittings

4：1/4″
8：1/2″

LC: Lock Assist

J: For ﬁtting (size: 1/4”, 1/2”)
V: For integral male body (size: 1/4”)*Compatible sizes of Lock Assist are 1/4”and 1/2”for ﬁttings. For valves, Lock Assist can be used for 1/4" integral male body, and can be used for 1/4 and 1/2valves with female end connections.

Dimensions and compatible types
Product category

Model

Unit:inch(mm)

TypeA

B

C

1.303 1.626 0.906
CVC4-LC-J (33.1) (41.3) (23)Compatible types of our CVC series nuts and valves
Male side nut

4-NM、4-NMH、4-NSM、4-NBM

Female side nut

4-NF、4-NFH、4-NBF

Male side nut

8-NM、8-NSM、8-NBMFemale side nut

8-NF、8-NBF

For ﬁtting
1.740 1.953 0.945
CVC8-LC-J (44.2) (49.6) (24)1.303 1.591 0.945
CVC4-LC-V (33.1) (40.4) (24)For machined
male bodyof valve

KD4□S-V□-、KD4A□S-V□-、KD4S□S-V□VLD4□S-V□-、RD4□S□-V□-、IB4□S-V□□WD4□S-V□-

Precautions
1) This product is designed for Kitz SCT CVC ﬁttings and our valves series. It cannot be used for other companies’products.
2) To use the product for our valve series other than the compatible types, contact our sales representative.
3) For details of compatible types of our CVC series nuts and valves, see the General Product Catalog separately.

https://kitz-sct.jp/english/■ Global Network
Tokyo Head Oﬃce

KITZ SCT AMERICA CORPORATION

Osaka Sales Oﬃce

KITZ SCT CORPORATION

Omorieki Higashiguchi Bldg. 3F, 1-5-1 Omorikita, Ota-Ku,
Tokyo 143-0016, Japan
TEL. 81-3-6404-2171 FAX. 81-3-6404-2172

5201 Great America Parkway, Suite 238,
Santa Clara, CA 95054, USA
TEL. 1-408-747-5546
FAX. 1-408-747-5726

202 MG Amagasaki Ekimae Bldg., 21 Misono-Cho, Amagasaki-shi,
Hyogo 660-0861, Japan
TEL. 81-6-6413-4177 FAX. 81-6-6413-4188

TAIWAN REPRESENTATIVE OFFICE

3F-1, No. 38, Beida Rd., East Dist.,
Hsinchu City 30044, Taiwan (R.O.C.)
TEL. 886-3-542-0110
FAX. 886-3-542-0551

Chukyo Branch Oﬃce

KITZ CORPORATION OF SHANGHAI

Ozeki-Heights 1F, 1-12-13 Unomori, Yokkaichi-shi,Mie 510-0074, Japan
TEL. 81-59-350-8121 FAX. 81-59-350-8122

Rm. 1701-1704, No.3000, North Zhongshan Rd., Putuo Dist.,
Shanghai 20063, China
TEL. 86-21-5243-5025 FAX. 86-21-6439-1257

Kyushu Sales Oﬃce

KITZ SCT CORPORATION OF KUNSHAN

Nitta SC Factory

KITZ SCT CORPORATION OF KUNSHANZ•S Fukuoka Bldg. 4F, 3-4-2 Higashihie, Hakata-Ku, Fukuoka-shi,
Fukuoka 812-0007, Japan
TEL. 81-92-483-0185 FAX. 81-92-483-0186

8-3, No. 3 Road, Export Processing A Zone,
Kunshan Jiangsu 215300, China
TEL. 86-512-5735-0700 FAX. 86-512-5735-7500

150-2 Nittakane-Cho, Ota-shi, Gunma 370-0352, Japan
TEL. 81-276-60-9600 FAX. 81-276-60-9330

BRANCH FACTORYBldg. 9, No. 68, Taoyuen Rd., Export Processing B Zone,Kunshan Jiangsu 215300, China!

Caution

Product speciﬁcations and performance values described in this catalog are based on our design calculations, in-house testing, product usage performance, and public standards and speciﬁcations,and are posted as a user’s guide under general usage conditions of the product. If the product is used outside of the described usage conditions or under special usage conditions, you should receive
our technical advice in advance or it will be necessary to ﬁrst conduct research and evaluation for performance veriﬁcation at the users’ own responsibility. Even if physical or personal damage
occurs without use of this procedure, we shall assume no responsibility. Although this catalog has been edited with the utmost care possible, contact us if there are any unclear points or if you comeacross any questionable matter. In addition, information described in this catalog will be revised without notice due to reasons that include correction of errors, supplementation/improvement ofinsuﬃcient content, improvement in product performance, design change, and discontinuation of production of products, etc., when deemed necessary. This invalidates the product catalog of theprevious version. The issue code is described on the back of your catalog. For product selection, contact us to conﬁrm whether your catalog is the latest version.
In addition, when exporting our products, exporters should obtain an export permit from the Ministry of Economy, Trade and Industry based on the provisions of the Export Trade Control Order of the“Foreign Exchange and Foreign Trade Act.” Contact us regarding any unclear points.

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