For Inert Gas and VacuumSpecifications

SP-V Cupla
Valve structure

Working pressure

Applicable fluids

Two-way shut-off

Inert gas,Vacuum

1/2", 3/4"

1/4", 3/8"

1/2", 3/4"

5.0

3.0

7.5

4.5

kgf/cm2

51

3176

46bar

50

30

75

45

PSI

725

435

1090

653

Seal material

Mark

Workingtemperature range

Remarks

Chloroprene rubber

CR (C308)

Seal material
Working temperature range

3.0 to 7.5
3.0 to 7.5 MPa{31 to 76 kgf/cm2}

1/4", 3/8"
MPaSize (Thread)For vacuum
Working pressureGasAir

Water

Automatic shut-off valves in both
socket and plug for vacuum
applications. Each can withstanda vacuum of as high as 1.3 x 10-1 Paeven when disconnected.
• Uses automatic shut-off valves with ultra-tight sealed construction in both
socket and plug. Ideal for vacuum applications.
• Having automatic shut-off valves in both socket and plug facilitates easy fluid
handling. Suitable for a wide range of vacuum applications as high as 1.3 x
10-1 Pa {1 x 10-3 mmHg} even when disconnected.
• Three types of seal material are available to suit any of the diversified
production lines for air conditioners, refrigerators or similar.
• Can be connected with SP Cupla Type A.

Stainless steel Stainless steel(Standard material) (Made-to-order item)

Brass(Standard material)

Body material-20˚C to +80˚C Standard material

Fluoro rubber FKM (X-100) -20˚C to +180˚C Standard material
Hydrogenated
HNBR (H708) -20˚C to +120˚C Standard material
nitrile rubber• No lubricant is applied to the O-ring of the socket for HNBR seal material products when shipping. Be sure
to apply refrigerating machine oil before use.

Max. Tightening Torque
Size (Thread)
TorqueNm {kgf • cm}

1/4"

3/8"

1/2"

3/4"

Brass

9 {92}

12 {122}30 {306}

50 {510}

Stainless steel

14 {143}

22 {224}60 {612}90 {918}

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

Interchangeability
Socket and plug with different sizes cannot be connected to each other.
Interchangeable with SP Cupla Type A but take heed of flow rate reduction.
(mm2)

Min. Cross-Sectional Area
Model

2SP-V

3SP-V

4SP-V

6SP-V

1838

71

110

Min. cross-sectional area

1.3 x 10-1 Pa {1 x 10-3 mmHg}

Suitability for Vacuum
Socket only

Plug only

When connected

Operational

Operational

Operational

Admixture of Air on Connection May vary depending upon the usage conditions.
Can be connected withSP Cupla Type A

( mL)

Model

2SP-V

3SP-V

4SP-V

6SP-V

Volume of air

1.0

2.4

3.2

10.5

Flow Rate – Pressure Loss Characteristics• Fluid : Water[Test conditions]

Both socket and plug
have automatic (sealedconstruction) shut-off
valves inside• Temperature: 24˚C

Standard body materials are brass and stainless steel(Note: Models 4SP-V and 6SP-V of stainless steel body are
made-to order items)
The above photos are for 3SP-V
A unique straight guide is incorporated to stabilize valve movement.

Pressure loss in MPa {kgf/cm2}

2SP-V
3SP-V
4SP-V (Brass)
4SP-V (Stainless steel)
6SP-V (Stainless steel)
6SP-V (Brass)

Adopted fluoro-rubber (FKM),
hydrogenated nitrile rubber (HNBR)
and chloroprene rubber (CR)as the standard seal materials to suit
air conditioner and refrigerator
production lines

0.1 {1}0.01 {0.1}1

Flow rate in L/min

Both socket and plug have unique vacuum resistantautomatic shut-off valves inside. The valve has
excellent vacuum resistance even after disconnection.

1296˚C

1.0 {10}101001000

SP-V Cupla
Models and Dimensions

Plug

WAF : WAF stands for width across flats.

Female thread

SocketFemale thread
TDT

H

CH

L

Model

Application

2P-V
3P-V
4P-V
6P-V

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

L
Dimensions (mm)

Mass (g)BrassStainless
steel

3967
123
211

34
59
118
202

L
36
40
44
52

H(WAF)
Hex.17
Hex.21
Hex.29Hex.35

C2225
28
36

T
Rc 1/4Rc 3/8Rc 1/2
Rc 3/4

Model

Application

2S-V
3S-V
4S-V
6S-V

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

Dimensions (mm)

Mass (g)BrassStainlesssteel

136
217421709127197393658

L
58
65
7288

øD
(28)
(35)
45
55

H(WAF)
1921
29
35

T
Rc 1/4Rc 3/8Rc 1/2
Rc 3/4• The sleeve shape of 4S-V and 6S-V differs from that of the above photo.

Seal Materials for Refrigerants
Various eco-friendly refrigerants for air conditioner and refrigerator have beendeveloped. Nitto Kohki, having invested years in the research and development ofexcellent seal materials to withstand refrigerants and refrigerant oils, has made earlyattempts to develop and manufacture the seal materials for these eco-friendly
refrigerants.

Comparison of External Appearance
When two different gases are used simultaneously in the production lines, SP-V-GN
type and SP-V-GNN type (non-interchangeable with standard SP-V and each others)
may be required in order to prevent connections to improper lines by mistakes. They
are made-to-order items. For details please contact Nitto Kohki direct or its distributor
in your country.
SocketSeal material

Hydrogenated nitrile rubber

Chloroprene rubber

HNBR (H708)

CR (C308)

MarkPlug

SP-V Cupla

OKSP-V-GN Cupla

OKResistant to hydrofluorocarbons
Features(HFC-134a, HFC-407C, HFC-410A,

Excellent resistance toHFC-404A), and PAG type and esterhydrofluorocarbons

type oils.

(HCFC-22 and HFC-134a)

One groove

Also resistant to heat up to 120˚C

Application

Refrigerator production lines
Air conditioner production lines

Air conditioner production lines

SP-V-GNN Cupla

One groove

OKTwo grooves

Two grooves
X indicates incompatibility.

Application Example

Vacuuming

Vacuuming

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

130