For High Pressure

350 Cupla
For hydraulic pressures up to 34.5 MPa {352 kgf/cm2}
Working pressure

Valve structure

Applicable fluid

34.5
34.5 MPa{352 kgf/cm2}

Two-way shut-off(Non-Spill)

Specifications
Body material

Special steel (Nickel plated)

Size (Thread)

1/4", 3/8", 1/2", 3/4", 1", 1 1/4", 1 1/2"

Pressure unitMPa

kgf/cm2bar

PSI

Working pressure

34.5

3523455000

Mark

Workingtemperature range

Remarks

Seal material

Seal material
Working temperature range

Fluoro rubber

FKM (X-100) -20˚C to +180˚C Standard materialMax. Tightening TorqueNm {kgf • cm}

Size (Thread)

1/4"

3/8"

1/2"

3/4"

Torque28{286}40{408}80{816}

150
250
500
500{1530} {2550} {5100} {5100}

1"

1 1/4"

1 1/2"

Hydraulic oil

Flow Direction

Their “airless valve shut-off design”
greatly reduces air admixture!
Ideal for hydraulic lines with larger
pressure fluctuations.
• Sleeve stopper mechanism can be engaged by rotating sleeve after connection.
• Both socket and plug have built-in automatic shut-off valves to prevent fluid
spill out when disconnected. Easy to handle.

Fluid flow can be bi-directional when socket and plug are connected.

Interchangeability
Different size socket and plug cannot be connected each other.
However, 350-2SP with 350-3SP or 350-10SP with 350-12SP can be connectedeach other.
(mm2)

Min. Cross-Sectional Area
Model
Min. crosssectional area350-2SP

350-3SP

350-4SP

350-6SP

350-8SP 350-10SP 350-12SP

34.2

34.2

73.0

149.6

227.0

452.4

452.4

Suitability for Vacuum
Not suitable for vacuum application in either connected or disconnected condition.
( mL)

Admixture of Air on Connection May vary depending upon the usage conditions.
Model
Volume of air

350-2SP350-3SP350-4SP

350-6SP

0.1

0.1

0.2

0.3

350-8SP 350-10SP 350-12SP
0.5

0.9

0.9

Flow Rate – Pressure Loss Characteristics[Test conditions]• Fluid : Hydraulic oil • Temperature : 40˚C 5˚C• Fluid viscosity : 32 x 10-6 m2/s • Density : 0.87 x 103 kg/m3

1.0{10}Body is made of special steel for durability
Seal materials do not protrude into fluid path whenconnected (touchless packing design)for improved durability

The body material isquenched to cope especiallywith impulses

Both socket and plug have built-in
automatic shut-off valves
Their “airless valve shut-off design”
greatly reduces air admixture

Pressure loss in MPa {kgf/cm2}

350-4SP

350-8SP

350-2SP

0.1{1}

350-10SP
350-12SP
0.010{0.10}

350-3SP

350-6SP

0.001{0.01}
1101001000

Flow rate in L/min

Fitted with stopper to prevent
disconnection of socket and plug.
(Designed to prevent accidental
disconnection)

Various end configurations

Precautions for use
Do not connect / disconnect Cuplas when pressure is applied or remaining.
93350 Cupla
Models and Dimensions

Plug

Product appearance may vary by size. / WAF : WAF stands for width across flats.

Female thread

SocketFemale thread
T

DDTCH

H

L

Model

Application

Mass (g)350-2P
350-3P
350-4P
350-6P
350-8P
350-10P
350-12P

R 1/4
R 3/8
R 1/2
R 3/4
R1
R 1 1/4
R 1 1/2

170
167
245
415
950
2,700
2,600

L

Dimensions (mm)

L
( 72)
( 72)
85
87
111(144)
(144)

C36
36
40.5
44.5
5775
75

H(WAF)
Hex.27
Hex.27
Hex.27
Hex.36
Hex.50Hex.70
Hex.70øD
29293040557878T
Rc 1/4Rc 3/8Rc 1/2
Rc 3/4
Rc 1
Rc 1 1/4
Rc 1 1/2• G thread is available on request.

Model

Application

Mass (g)350-2S
350-3S
350-4S
350-6S
350-8S
350-10S
350-12S

R 1/4
R 3/8
R 1/2
R 3/4
R1
R 1 1/4
R 1 1/2

360
353
545
976
1,740
5,600
5,500

Dimensions (mm)

L
( 82)
( 82)
( 93.5)(105.5)(129 )(180 )(180 )

øD( 34)
( 34)
(41)
(49 )
( 63 )
89
89

H(WAF)
Hex.30
Hex.30
Hex.3646 x ø5255 x ø62
Hex.80 x ø90
Hex.80 x ø90

T
Rc 1/4Rc 3/8Rc 1/2
Rc 3/4
Rc 1
Rc 1 1/4
Rc 1 1/2• G thread is available on request.

Application Example

Hydraulic unit

Optional Accessory

Purge Adapter

Simple one push purge button
for easy pressure release

Metal Purge Adapter for hydraulic lines (Semi-standard)

Residual pressure purge button• Can be attached to hydraulic lines to purge residual pressure effectively.
PAD-2 (Part No.CB19855)

ModelHydraulic oil

Applicable fluid

Drain removal port

Steel (Nickel plated)

Material

Rc 1/4

Application
Pressure unitMPa

kgf/cm2

barPSI

Working pressure

35.0

357

3505080

Proof pressure

52.5

5365257610

Seal material
Working temperature range

Nitrile rubber (NBR)-5˚C to +80

Semi standard items: As these items are not always in stock, delivery time is subject to confirmation.

Before use, please be sure to read “Safety Guide” described at the end of this book and “Instruction Sheet” that comes with the products.

94