Ck055

Quick connect couplings for use on equipment for temperature control

HW TypeBest suitedfor hot water applications
such as plastic moldings.

ISO 9001

JQA-2025

Couplings Division

ISO 14001
ISO 9001
ISO 14001

JQA-EM4057

NITTO KOHKI CO., LTD.

Products Comply
with RoHS Directive

Working pressure

Valve structure

Applicable fluids*

Two-way shut-off

Water* This product isdesigned for use withwater from -20˚C to+180˚C. When usedwith other fluids, checkthe suitability of theseal and body material.

2.0
2.0 MPa{20 kgf/cm 2}

SteamD esi gn e d fo r s afet y

Safety1

Safety lock function as a standard specification.
Prevents accidental disconnection caused by vibration or impact.
Safety lock function (Sleeve lock)
How to lock

How to unlock

Slide the Lock Ring in the directionof the arrow A and rotate it
simultaneously. When the Stopperis aligned with the shallower cutout
on the Lock Ring, the Cupla will belocked.

Slide the Lock Ring in the directionof the arrow A and rotate it
simultaneously. When the Stopperis aligned with the deeper cutout on
the Lock Ring, the Cupla will beunlocked.

AASleeve
PlugSocket

Stopper

Stopper

LOCKOFF

Safety2Safety

3

LOCKON

Lock Ring

Lock Ring

Connected state (before lock)Connected state (locked)

Nickel plated on the liquid contact parts.
Nickel plated to improve corrosion resistance.

Plug

SocketAdopting the most suitable rubber for hot water.
Socket has double O-ring for improved seal.
Working temperature range is -20˚C to +180˚C.
SocketDoubleO-ringQuick connect couplings for use on equipment for temperature control

HW TypeApproximate time for Valve / O-ring replacement
Test conditions

Valve*Test results by us• Testing device: Mold temperature controlling machine • Fluid: Clean water• Test condition: Continuous test with the Cupla connected

when

180˚C

Please replace the whole Cupla
in approximately 1000 hours.

• Test temperature: 160˚C, 180˚C

Hot water

180˚C

The valve cannot be replaced.

Before test
(unused)

when

160˚C

Please replace the whole Cupla
in approximately 3000 hours.

After 1000 hoursof useHot water

160˚C

The valve cannot be replaced.

Before test(unused)

O-ring

when

180˚C

when160˚C

After 3000 hoursof usePlease replace the O-rings ofthe Socket in approximately
700 hours.

The packing
starts to swell

Please replace the two O-rings at once.

Accessory

Please replace the O-rings ofthe Socket in approximately
2000 hours.

O-ring (2 pieces/set)
Please apply grease at the replacement.

Please replace the two O-rings at once.

The compression set of the O-ring when used with hot water.
Large

Guide for Replacement (180˚C)

Guide for Replacement (160˚C)

700 hours

2000 hours

Compression
set
500

700

1000

1500

2000

2500

3000

3500

hours

Caution*Hot water continuous flow test by a mold temperation controller
Valve: For continuous use of 3000 hours at 160˚C / 1000 hours at 180˚C

O-ring: For continuous use of 2000 hours at 160˚C / 700 hours at 180˚CAlthough we have confirmed that there is no leakage, it is our experimental value and not a guaranteed value.
Please consider above hours just as a guide. The durability of the seal differs depending on the customers usage conditions. (Number of connection /disconnection, fluid additives, etc.)• Air will be admixed at the time of connection. Please purge the air by the equipment side when using with hot water.
• If additives are mixed in water or the piping is filled with steam, the lifetime of the seal will be decreased.
When using in such an environment, conduct performance evaluation test by actual product.

Specifications(mm2)

Min. Cross-Sectional Area

Body material

Brass (Nickel plated)

Size (Thread)

Plug : R 1/4, R 3/8, R 1/2 / Socket : Rc 1/4, Rc 3/8, Rc 1/2

Model

HW-2S-F × HW-2P-M

HW-3S-F × HW-3P-M

HW-4S-F × HW-4P-M

265173Min. Cross-sectional area

Pressure unit

MPakgf/cm2barPSI

Working pressure *1

2.02020290

Suitability for Vacuum

Proof pressure *2

3.03130435

Workingtemperature range

Socket only

Plug only

When connected

MarkRemarks--

Operational

Seal material
Seal material
Working temperature range *3 Fluoro rubber

FKM (X-100)

1.3 × 10-1 Pa {1 × 10-3 mmHg}-20˚C to +180˚C Standard material*1: The normal allowable fluid pressure under continuous use. Continuously exceeding the working pressure may
cause leakage or damage.
*2: The maximum pressure, up to which the performance of the cupla will not be affected - even if the max
working pressure is temporarily exceeded.
*3: The available temperature range differs depending on usage conditions.

Max. Tightening Torque

Admixture of Air on Connection
Model

1/4"

3/8"

1/2"

Torque9 {92}

12 {122}30 {306}

On installation or removal always use correct size spanner/wrench on the hexagon section of socket/plug body.

HW-3S-F × HW-3P-M

HW-4S-F × HW-4P-M

1.2

2.7

3.9

Volume of air

Nm {kgf • cm}

Size (Thread)

Volume of Spillage per Disconnection
Model( mL)

May vary depending upon the usage conditions.

HW-2S-F × HW-2P-M

May vary depending upon the usage conditions.

(mL)

HW-2S-F × HW-2P-M

HW-3S-F × HW-3P-M

HW-4S-F × HW-4P-M

0.8

2.1

3.2

Volume of spillage

Flow Rate – Pressure Loss Characteristics

Flow Direction[Test conditions]

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

• Fluid : Water• Temperature: 25˚C ± 5˚C

1.0{10}HW-3S-F × HW-3P-M

Interchangeability
Different sizes of sockets and plugs cannot be connected to each other.
SP Cupla Type A and HW Type Cuplas of the same size can be connected to each otherregardless of end configurations.
However, SP Cupla Type A has different seal material characteristics, so the productspecification and durability will differ. Conduct performance evaluation test under your actual
operating environment and conditions within range of the working conditions of the product.

Pressure loss in MPa {kgf/cm2}

HW-2S-F × HW-2P-M
0.1{1}

HW-4S-F × HW-4P-M
0.01
{0.1}

0.001{0.01}
110100Flow rate in L/min

Models and Dimensions

Plug

WAF : WAF stands for width across flats.

Male thread

Socket Female thread
TDDTHCH
L

L

ModelApplication

Mass (g)HW-2P-M
HW-3P-M
HW-4P-M

Rc 1/4Rc 3/8Rc 1/241
71
149

Dimensions (mm)

L(44)
( 51)
( 62)

Precautions for use

C222528

øD
18.5
2330

H (WAF)
Hex.17
Hex.21
Hex.27Model

HW-2S-F
HW-3S-F
HW-4S-F

Application

Mass (g)

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

150
247
480

Dimensions (mm)L
( 66 )( 74)( 87 )

øD283545

H (WAF)
Hex.19Hex.24
Hex.30T
Rc 1/4Rc 3/8Rc 1/2

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.
WebT
R 1/4
R 3/8
R 1/2

www.nitto-kohki.co.jp/eHead 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

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

Printed in Japan

17DV02- 1