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** This product isdesigned for use withXBUFSGSPN$UP
$8IFOVTFE
with other fluids, checkthe suitability of theTFBMBOECPEZNBUFSJBM

2.0
2.0 MPa

Two-way shut-offWaterSteam{20 kgf/cm 2}

D esi gn e d fo r s afet y
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.

AASleevePlugLOCKOFFLOCKON

SocketStopper

StopperLock Ring

Lock Ring

Connected state (before lock)Connected state (locked)

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

PlugSocket

Adopting 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

7HVWLQJGHYLFH0ROGWHPSHUDWXUHFRQWUROOLQJPDFKLQH)OXLG&OHDQZDWHU7HVWWHPSHUDWXUHÝ&Ý&
7HVWFRQGLWLRQ&RQWLQXRXVWHVWZLWKWKH&XSODFRQQHFWHG

when180˚C

3OHDVHUHSODFHWKHZKROH&XSOD
in approximately 1000 hours.

Hot water

180˚C

The valve cannot be replaced.

Before test
(unused)when160˚C

3OHDVHUHSODFHWKHZKROH&XSOD
in approximately 3000 hours.

After 1000 hoursof useHot water

160˚C

The valve cannot be replaced.

Before test(unused)

O-ringwhen180˚C

After 3000 hoursof use

The packing
starts to swell

Please replace the O-rings ofthe Socket in approximately
KRXUVPlease replace the two O-rings at once.

when160˚CAccessory

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

2ULQJ SLHFHVVHW
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

Compressionset
500

700

1000

15002000

2500

3000

3500hours

C a u tio n*Hot water continuous flow test by a mold temperation controller
Valve:)RUFRQWLQXRXVXVHRIKRXUVDWÝ&KRXUVDWÝ&O-ring:)RUFRQWLQXRXVXVHRIKRXUVDWÝ&KRXUVDWÝ&Although we have confirmed that there is no leakage, it is our experimental value and not a guaranteed value.
3OHDVHFRQVLGHUDERYHKRXUVMXVWDVDJXLGH7KHGXUDELOLW\RIWKHVHDOGLIIHUVGHSHQGLQJRQWKHFXVWRPHUVXVDJHFRQGLWLRQV 1XPEHURIFRQQHFWLRQ
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 unitMPa

kgf/cm2bar

PSI

Working pressure *1

2.02020290

Suitability for Vacuum

Proof pressure *2

3.03130435

Socket only

Plug only

When connected

Mark

Workingtemperature range

Remarks--

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}

HW-3S-F × HW-3P-M

HW-4S-F × HW-4P-M

1.2

2.73.9Volume 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

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

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
TD

DT

H

CH
L

L

Model

Application

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

Rc 1/4Rc 3/8Rc 1/24171
149

Dimensions (mm)

L(44)
( 51)
( 62)

Precautions for use

C222528øD
18.52330H (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

150247480

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/e

DISTRIBUTED BY

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

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