Ck057

Quick Connect Couplings for the molding industry

CUPLA FOR DIE CASTING
For piping, core driving cylinders & water cooling

ISO 9001

JQA-2025

Couplings Division

ISO 14001
ISO 9001
ISO 14001

JQA-EM4057

NITTO KOHKI CO., LTD.

Products Comply
with RoHS Directive

HSP-DC Cupla / Purge Adapter / 350 Cupla / Flat Face Cupla F35 / Flat Face Cupla FF
For
core driving For core driving cylinders when clamping and opening of molds.

Application Example

HSP-DC Cupla

ExampleofpipingCylinder forcore driving

Application Example: Purge Adapter

Cupla

Solenoid
valve
Core

Moldedproduct

Movable
die

Fixed
die

CUPLA usedmainly for coredriving systems

HSP-DC
Cupla

Purge Adapter
PAD-2

Semi-standard

Semi-standard

20.6
Strengthened type of HSP Cupla.

350
Cupla

Residual pressure
removal for hydraulic circuits.

Flat Face Cupla
F35

34.5

1

MPa

35

Cupla accessories

35

MPa

Flat Face Cupla
FF

35

MPa

MPa

MPa

"Airless valve shut-off design" reduces
both air admixture and liquid spillage.

For high pressure. Flat contact facedesign minimizes air admixture andliquid spillage.

1.5 to 2 times flow rate of Flat Face
Cupla F35 type.

For
Cooling

SP Cupla Type A / Zerospill Cupla / TSP Cupla / TSP Cupla with Ball Valve / Cupla TSW Type for Spot CoolingTo achieve high-cycle cooling and efficient exchange of die.

ExampleofpipingApplication Example

TSP Cupla
SP Cupla Type A

Cupla
Manifold

Manifold

Application Example

SP Cupla Type A

CUPLA usedmainly forcooling systems

Cooling unit

Application Example

Cupla TSW Typefor Spot Cooling

SP Cupla
Type A

Mold

Zerospill
Cupla
Formediumpressure

Valves in both socket and plug prevent fluid
spill out on disconnection.

TSP
Cupla

For
mediumpressure

Unique seal design reduces both liquid
spillage and air ingress.

TSP Cupla

Socket with Ball Valve

Cupla TSW Typefor Spot CoolingMade-to-order itemFor
mediumpressure

For lowpressure

Both plug and socket with valvelessstructure drastically saves pressureloss.

One-piece design of TSP Cupla socket
and ball valve.

For lowpressure

Ideal for improving the efficiency ofsetup change and repair work of
die-casting molds.

2

For
hydraulicdriving

HSP-DC Cupla / Purge Adapter PAD-2

HSP-DC Cupla

Semi-standard

Strengthened type of HSP Cupla.

20.6
MPa

Please checkthe marking.

- Valve material with excellent impact resistance is adopted. Ideal for
die-casting machines with large pressure fluctuations.
- "Electroless nickel phosphorus plating" which is not soluble toflame-retardant "water glycol type hydraulic fluid" is entirely adopted.
- HSP Cupla and HSP-DC Cupla are interchangeable with the same size.
However, please use HSP-DC Cupla for applications involving pressure
fluctuation.
- For the DC type, please confirm the "DC" marking on the hexagonalpart of the plug and the flat part of the socket.

Specifications
Special steel (Nickel plated)

Body material

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

Size (Thread)Working pressure

Valve structure

Applicable fluid

Pressure unitMPa

kgf/cm2

bar

PSI

Max. working pressure

20.6

210

206

2990

31.0

316

310

4500

Seal material

Mark

Working
temperature range

Remarks

Nitrile rubber

NBR (SG)

Proof pressure

20.6
20.6 MPa

Two-way shut-off

Seal material
Working temperature range

Hydraulic oil

Purge Adapter PAD-2
35

MPa
One push

Residual pressure purge button

oil

Semi-standard-20˚C to +80˚C Standard material

Cupla accessories

Purge Adapter for hydraulic lines.
- Can be attached to hydraulic lines to purge residual pressure
effectively.
- One push of the "Residual pressure purge button" drains oil from "Drain
removal port", and the residual pressure is removed.

Specifications
Steel (Nickel plated)

Body material

R 1/4

Size (Thread)
Pressure unitMPa

kgf/cm2

bar

PSI

Max. working pressure

35.0

357

350

5080

52.5

536

525

7610

Seal material

Mark

Working
temperature range

Remarks

Nitrile rubber

NBR (SG)

Proof pressure

Drain removal port
(ø8 Tube fitting)

Seal material
Working temperature range-5˚C to +80˚C Standard material

Residual Pressure Release Jig ZN series

Semi-standard

Cupla
accessories

For HSP-DC Cupla, SP Cupla Type A
handleWorking pressure

Applicable fluid

35.0
35.0 MPa
3

Just byturning

For plugs
Hydraulic oil

The photos show the jigs for HSP-DC Cupla.

For sockets- Residual pressure within socket orplug can be released easily by justturning the handle- Residual pressure release jigs areavailable in two types; socket typefor use with plugs and plug type foruse with sockets.
- Connection to sockets or plugs isthe same as connection of normal
Cuplas.

Max. working pressure: The normal allowable fluid pressure under continuous use. Continuously exceeding the working pressure may cause leakage or damage.
Proof Pressure: The maximum pressure, up to which the performance of the cupla will not be affected - even if the max working pressure is temporarily exceeded.

350 Cupla / Flat Face Cupla F35 / Flat Face Cupla FF

For core driving cylinders when clamping and opening of molds.
"Airless valve shut-off design" reduces
both air admixture and liquid spillage.

350 Cupla
34.5

Equipped with sleeve
stopper mechanism.

MPa- The unique "Airless valve shut-off design" reduces both air admixture on
connection and liquid spillage on disconnection.
- Ideal for hydraulic lines with large pressure fluctuations.
- Sleeve stopper mechanism can be engaged by rotating sleeve afterconnection.
- Both socket and plug have built-in automatic shut-off valves to prevent fluid
spill out when disconnected. Easy to handle.

Specifications

Working pressure

Valve structure

Applicable fluidSpecial steel (Nickel plated)

Size (Thread)

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

Pressure unitMPa

kgf/cm2

bar

PSI

Max. working pressure

34.5

352

345

5000

Proof pressure

34.5
34.5 MPa

Body material

Two-way shut-off(Non-Spill)

Seal material
Working temperature range

Hydraulic oil

Flat Face Cupla F35

51.5

525

515

7470

Seal material

Mark

Working
temperature range

Remarks

Fluoro rubber

FKM (X-100) -20˚C to +180˚C Standard material

For high pressure. Flat contact face design
minimizes air admixture and liquid spillage.
- The unique "Airless valve shut-off design" reduces both air admixture on
connection and liquid spillage on disconnection.
- Minimizes air admixture during connection to keep the possible malfunction of- equipment at minimum level.
- Easy to clean dust and foreign matters adhered on the surface of coupling.
- Push-to-connect operation.
- Sleeve stopper design preventing accidental disconnection under vibration or
impacts enhances workability and safety.
- The special design reduces pressure loss considerably, and especially suited tohydraulic applications in which big flow is needed. Both socket and plug havebuilt-in automatic shut-off valves that prevent fluid spill out on disconnection.

35

MPa

Specifications

Working pressure

Valve structure

Applicable fluid

35.0 MPa

Unique flat contact face design.

MPa

MPa

kgf/cm2

bar

PSI

Max. working pressure

35.0

357

350

5080

Proof pressure

Hydraulic oil

Flat Face Cupla FF
35

Pressure unit

Seal material
Working temperature range(Non-Spill)

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

Size (Thread)

35.0
Two-way shut-off

Special steel (Nickel plated)

Body material

Equipped with sleeve
stopper mechanism.

52.5

536

525

7610

Seal material

Mark

Working
temperature range

Remarks

Fluoro rubber

FKM (X-100) -20˚C to +180˚C Standard material

Nitrile rubber

NBR (SG)-20˚C to +80˚C Made-to-order item

1.5 to 2 times flow rate of Flat Face
Cupla F35 type. * Compared with Nitto Kohki's 35 MPa Cuplas.
- Compared with Nitto Kohki's conventional 35 MPa Cuplas, the flow volume isincreased 1.5 to 2 times. Increase ratio of each flow volume depends on the Cupla size.
- "Airless valve shut-off design" minimizes spillage volume on disconnection and- admixture volume of air on connection.
- Best suited for hydraulic lines with drastic high pressure pulsation such as indie-casting machines.
- Push-to-connect operation.
- Sleeve stopper design preventing accidental disconnection under vibration
or impacts enhances workability and safety.
- Sizes are Rc 3/8, Rc 1/2, Rc 3/4, and Rc 1. Only the same size of socket and plug can be connected.

Equipped with sleeve
stopper mechanism.

Specifications
Special steel (Nickel plated)

Body material

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

Size (Thread)Working pressure

Valve structure

Applicable fluidMPa

kgf/cm2

bar

PSI

Max. working pressure

35.0

357

350

5080

Proof pressure

35.0
35.0 MPa

Unique flat contact face design.

Pressure unit

Two-way shut-off(Non-Spill)

Hydraulic oil

Seal material
Working temperature range

Max. working pressure: The normal allowable fluid pressure under continuous use. Continuously exceeding the working pressure may cause leakage or damage.
Proof Pressure: The maximum pressure, up to which the performance of the cupla will not be affected - even if the max working pressure is temporarily exceeded.

52.5

536

525

7610

Seal material

Mark

Working
temperature range

Remarks

Nitrile rubber

NBR-20˚C to +80˚C Standard material
4

For
Cooling

SP Cupla Type A / Zerospill Cupla

Valves in both socket and plug prevent
fluid spill out on disconnection.

SP Cupla Type AFor
mediumpressure- Automatic shut-off valves in both socket and plug prevent fluid spill out
on disconnection. Easy to handle.
- Available in various standard body materials, sizes and end
configurations to cope with diversified applications and operating
situations.
- Steel couplings are nickel plated. Measures to reduce the load on theenvironment are taken.
- Plugs with male thread end are also available.

Self-aligned valve design
provides better seal
The design of the valve head makes smooth
self-aligned return to its original position when socket
and plug are disconnected. This mechanism enhances
safety sealing of individual socket or plug when
disconnected (1 to 8 SP-A Type).

Working pressure

Max. working pressure

Proof pressure

Note: Depending on thetemperature of steam/
hot water, the heat may
damage seal materials.

Hydraulic oil Chemicals

Air

Gas

Stainless steel (SUS304), Steel (Nickel plated)

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

2"

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

2"

MPa

5.0

3.0

2.0

1.5

7.5

4.5

3.0

2.0

kgf/cm2

51

31

20

15

76

46

31

20

bar

50

30

20

15

75

45

30

20

PSI

725

435

290

218

1090

653

435

290

MPa

7.5

4.5

3.0

2.3

10.0

6.5

4.5

3.0

kgf/cm2

76

46

31

24

102

66

46

31

bar

75

45

30

23

100

65

45

30

PSI

1090

653

435

334

1450

943

653

435

Two-way shut-off

Applicable fluids

Water

Brass

Size (Thread)

Valve structure

1.5 to 7.5
1.5 to 7.5 MPa

Specifications
Body material

Seal material *Working temperature range

Seal material

Mark

Working
temperature range

Nitrile rubber

NBR (SG)-20˚C to +80˚C

Fluoro rubber

FKM (X-100) -20˚C to +180˚C
EPDM (EPT) -40˚C to +150˚C

Ethylene-propylene
rubberRemarks

Standard
material* Plugs with male thread end mounting nitrile rubber or ethylene-propylene rubber are made-to-order items.
* Seal material available for steel body is nitrile and fluoro rubber.

Steam

Unique seal design reduces both
liquid spillage and air ingress.

Zerospill CuplaFor
mediumpressure- New valve design offers smooth zero-friction movement.
- Push to connect design.
- The variety of body materials, sizes and end configurations has beenstandardized to comply with wide range of applications.
- Automatic shut-off valves in both socket and plug prevent fluid spill out
on disconnection.

液だれ低減バルブ構造

Unique seal design reduces both liquid spillage and air ingress
Connected

Disconnected

New valve design offers smooth zero-friction
movement.

Specifications

Working pressure

3.5
35 MPa1/4", 3/8", 1/2", 3/4", 1"

Size (Thread)

Valve structure*blue colored water is used to show
volume of spillage clearly.

Two-way shut-off(Non-Spill)

Pressure unitMPa

kgf/cm2

bar

PSI

Max. working pressure

3.5

35

35

508

Proof pressure
Seal material
Working temperature range

Applicable fluids

5.3

54

53

769

Seal material

Mark

Working
temperature range

Remarks

Nitrile rubber

NBR (SG)-20˚C to +80˚C

Fluoro rubber

FKM (X-100) -20˚C to +180˚C
EPDM (EPT) -40˚C to +150˚C

Ethylene-propylene
rubberWater

5

Hydraulic oil Chemicals

Air

Gas

Stainless steel (SUS304)

Brass

Body material

Standard
material

Note: Applicable fluids depend on the body material and seal material.
Acceptable working temperature range depends on operating conditions.
Max. working pressure: The normal allowable fluid pressure under continuous use. Continuously exceeding the working pressure may cause leakage or damage.
Proof Pressure: The maximum pressure, up to which the performance of the cupla will not be affected - even if the max working pressure is temporarily exceeded.

TSP Cupla / TSP Cupla Socket with Ball Valve / Cupla TSW Type for Spot CoolingTo achieve high-cycle cooling and efficient exchange of die.
Both plug and socket with valveless structure
drastically saves pressure loss.

TSP CuplaFor
mediumpressure

For connection
to braided hoses- Valveless construction drastically saves pressure loss and achieves high flow rate.
- High viscosity fluids such as grease can be applied.
- Available in various standard body materials, sizes and end configurations to copewith diversified applications and operating situations.
- No hose clamp required. Simple and secure connection to braided hose. (TPN/TSN Type)Specifications
Brass

Body material
Size (Thread and hose)

Working pressure- No hose clamp required.
- No additional tightening
required.

Valve structure

1.5 to 7.5
Straight through1.5 to 7.5 MPa

Two piece
design• Please use braided hoses available in the market.
• Applicable fluids for braided hose connection type depend
upon the specifications of braided hoses to be used.

Applicable fluids

Note: Depending on thetemperature of steam/
hot water, the heat may
damage seal materials.

Water

Hydraulic oil Chemicals

Air

Gas

MPa
2
Max. working pressure kgf/cm
bar
PSI
MPa
kgf/cm2
Proof pressurebarPSI

1/8", 1/4"
3/8", 1/2"
5.0
51
50
725
7.5
76
75
1090

3/4"
1"
3.0
31
30
435
4.5
46
45
653

Seal material

Seal material
Working temperature range

Stainless steel (SUS304), Steel (Nickel plated)

1 1/4"
1 1/2"
2.0
20
20
290
3.0
31
30
435

1/8", 1/4"
3/8", 1/2"
7.5
76
75
1090
10.0
102
100
1450

2"
1.5
15
15
218
2.3
24
23
334

Ethylene-propylene
rubber

1 1/4"
1 1/2"
3.0
31
30
435
4.5
46
45
653

2"
2.0
20
20
290
3.0
31
30
435

Working
temperature range

Remarks-20˚C to +80˚C
NBR (SG)FKM (X-100) -20˚C to +180˚C
EPDM (EPT) -40˚C to +150˚C

Standard
material

Mark

Nitrile rubber
Fluoro rubber

3/4"
1"
4.5
46
45
653
6.5
66
65
943

• SUS316 is available as option. • Working pressure, proof pressure and working temperature range of TSP Cupla for braided hoses depend upon the specificationsof braided hoses to be used. • Seal material available for braided hoses is nitrile rubber only. • Seal material available for steel body is nitrile rubber only.

Steam

TSP Cupla Socket with Ball Valve
For lowpressure
Ball Valve

Shut
When disconnected

One-piece design of TSP Cupla socket and ball valve.
- Sleeve stopper mechanism prevent
accidental
disconnection
duringconnection. (when the valve is open.)- Socket valve can be opened and shut
off while socket and plug areconnected.
- Ball valve design provides for high flowrate.
- High viscosity fluids such as grease canbe applied.

Equipped with sleeve
stopper mechanism.

Specifications
Model

Ball ValveOpen
When connected
Working pressure

Valve structure

Applicable fluids

1.0
1.0 MPa

Size (Thread)

Water

Hydraulic oil

Airfor Spot Cooling

OUT INFor lowpressure

BV-4TSF

BV-6TSF

BV-8TSF

3/8"

1/2"

3/4"

1"

Brass

Pressure unitMPa

kgf/cm2

bar

PSI

Max. working pressure

1.0

10

10

145

Proof pressure

1.5

Gas

Cupla TSW Type Made-to-order
item

BV-3TSF

1/4"

Body material

Seal material
Working temperature range
One-way shut-off

BV-2TSF

15

15

218

Seal material

Mark

Working
temperature range

Cupla Part

Fluoro rubber

FKM

Ball Valve Part

Fluoropolymer resin-

Ideal for improving the efficiency of setup change
and repair work of die-casting molds.
- Connecting / disconnecting of piping is "one-touch", contributing to reductionchangeover and repair time.
- The cooling tube (plug side) and the hose attachment part (socket side) can beseparated. Reuse of the hose side is possible.
Application example
of cooling inner tube

Cooling inner tube

Plug

Mold
Working pressure

Valve structure

Applicable fluids

0.5 MPa

Straight through

Water

Heated oil

Brazed or M-thread

SocketSpecifications
Brass

Model

Water, Hot water

Applicable fluid
Pressure unitMPa

kgf/cm2

bar

PSI

Max. working pressure

0.5

5

5

72.5

Proof pressure

0.5-5˚C to +120˚C

Seal material
Working temperature range

Max. working pressure: The normal allowable fluid pressure under continuous use. Continuously exceeding the working pressure may cause leakage or damage.
Proof Pressure: The maximum pressure, up to which the performance of the cupla will not be affected - even if the max working pressure is temporarily exceeded.

0.8

8

8

116

Seal material

Mark

Working
temperature range

Remarks

Fluoro rubber FKM ( X-100 ) 0˚C to +150˚C Standard material
6

For
Cooling

Multi Cupla

Intermediate coupling for drain tube of local cooling system.

Ideal for shortening mold setup time.

item
Multi Cupla Made-to-order- Can connect and disconnect 12 lines of drainage tubes for local
cooling simultaneously. (ø4 mm tube)- Significant reduction in setup time when exchanging mold.
- The plug side has a plate to fix to the equipment.
- Main body material is aluminum alloy (hard alumite). Socket islightweight, 250 g.
- By adopting end-face seal, enhanced operability with low connection
resistance when connected.

For lowpressure

For consultation with other than the specifications below, please contact our sales staff.

Exampleof pipingSocket

Multi
Cupla

Plug

Confirmation ofwater flow

Mold

With fixing plate

12

Cooling
unit

Drain tube
ø4 mm

lines

Specifications
Aluminum alloy (hard alumite)Model

M5 (tube fitting optional)

Size (Thread)Working pressure

Valve structure

Applicable fluids

MPa

kgf/cm2

bar

PSI

Max. working pressure

1.0

10

10

145

Proof pressure

1.0
1.0 MPa

Pressure unit

Straight through

Water

Seal material
Working temperature range

Heated oil

1.5

15

15

218

Seal material

Mark

Working
temperature range

Remarks+ 80˚CStandard material

Fluoro rubber FKM ( X-100 )Max. working pressure: The normal allowable fluid pressure under continuous use. Continuously exceeding the working pressure may cause leakage or damage.
Proof Pressure: The maximum pressure, up to which the performance of the cupla will not be affected - even if the max working pressure is temporarily exceeded.

Precautions for use

Quick connect couplings for use on equipment for temperature control

Quick connect couplings for universal purpose for air lines

Mold Cupla General type / High flow type

Hi Cupla

Designed for quick replacement for die and mold.

For air piping such as mold releasing agent sprays.

-Long sleeve socket facilitates connection/disconnection
with plug embedded in mold.
-Flow rate has doubled of general type to increase
productivity.
-Various sizes and end configurations to suit a wide
variety of mold applications.

-Critical structural parts of steel models are heat-treatedfor increased strength giving greater durability andresistance to wear.
-Steel coupling is suitable for air. Brass or stainless steel
is suitable for water. Note that fluid will come out from theplug when disconnected.

Prior to use, be sure to read the “Precautions Relating to the Use of All Cuplas” on the Cupla general catalog and the “Instruction Sheet” that comes with the product and use them correctly and safely.

NITTO KOHKI CO., LTD.
Web

www.nitto-kohki.co.jp/e

DISTRIBUTED BY

Head Office9-4, Nakaikegami 2-chome, Ohta-ku, Tokyo 146-8555, Japan
Tel : +81-3-3755-1111
Fax : +81-3-3753-8791
E-mail : overseas@nitto-kohki.co.jp
This catalog is printed using environmentally friendly paper and vegetable oil inks.

Minus Carbon Printing Systems

This catalog is printed using environmentally friendly paper and vegetable oil inks.

Specifications and designs are subject to change at any time without notice.

Printed in Japan

17XV00- 1
17XX00-