S Coupler Stainless Steel KKA Series, Socket (S) Female Thread Type

Brand :

SMC

Caution

Product Description

· Body material: stainless steel (SUS304)
· Seal material: Fluororubber (special FKM)
[Features]
· Available with or without check valve to suit different working conditions
· Reduces amount of liquid dripping when disconnecting plug from socket
　Liquid dripping amount: 0.02 to 0.77 cm³ at each removal; aeration amount: 0.1 to 2.7 cm³ at each removal
· Non-greased specification (standard)

S Coupler KKA Series Stainless Steel Socket Female Thread Type Specifications

JIS symbols for plug only and socket only

JIS symbol for connected plug and socket

Working Fluid	Water, air
Operating Pressure Range_*1	KKA3: -100 kPa to 1 MPa KKA4, KKA6, KKA7, KKA8, KKA9: 0 to 1 MPa
Guaranteed Proof Pressure	10 MPa
Ambient Temperature and Working Fluid Temperature Range	-5 to +150℃ (no freezing) *Cannot be used for steam
Non-greased Specification	Does not use grease. (Rubber and metal sliding parts: fluorine coating)
Material	Metal parts: SUS304; rubber parts: fluoroelastomer (special FKM)
Seal	Includes male thread sealant

*1: Do not use with a leak tester or for vacuum retention as zero leakage cannot be guaranteed.

Characteristics of Models With Check Valve on Both Sides

Body Size	Liquid Dripping Amount (cm³ per instance)	Aeration Amount (cm³ per instance)
KKA3	0.02	0.1
KKA4	0.04	0.1
KKA6	0.06	0.2
KKA7	0.14	0.5
KKA8	0.27	0.9
KKA9	0.77	2.7

"Liquid dripping amount" refers to the amount of internal water that is lost when the plug and socket are disengaged
"Aeration amount" refers to the amount of external air that is entrained when the plug and socket are connected

Effective Cross-sectional Area

With or Without Check Valve	Socket	Effective Cross-sectional Area mm²
Plug socket with check valve on both sides	KKA3S-01F	17.4
	KKA4S-02F	26.4
	KKA6S-04F	54.2
	KKA7S-06F	99.6
	KKA8S-10F	168.3
	KKA9S-12F	332.1

Dimensions: Socket (S)

With Check Valve

With check valve, female thread type dimensional drawing

(Unit: mm)

Body Size	Model	T Connection Port Diameter	H Width Across Flats	φD	L	Minimum Hole Diameter	Effective Cross-sectional Area mm²	Weight g
1/8	KKA3S-01F	Rc 1/8	17	18.5	37.6	5.9	18.5	46.9
	KKA3S-02F	Rc 1/4	17		41.2			47.2
	KKA3S-03F	Rc 3/8	19		43.1			52.3
1/4	KKA4S-02F	Rc 1/4	22	24.2	46.1	7.7	31.8	97.1
	KKA4S-03F	Rc 3/8	22		46.9			91.1
	KKA4S-04F	Rc 1/2	24		52.3			104.3
1/2	KKA6S-03F	Rc 3/8	30	30.7	50.5	10.2	55.3	189.6
	KKA6S-04F	Rc 1/2			56.2			202.0
	KKA6S-06F	Rc 3/4			57.9			180.6
3/4	KKA7S-04F	Rc 1/2	36	42.5	75.1	13.6	101.5	477.2
	KKA7S-06F	Rc 3/4	36		76.5			457.4
	KKA7S-10F	Rc 1	41		82.3			550.9
1	KKA8S-06F	Rc 3/4	46	55	90.9	17.6	169.9	935.2
	KKA8S-10F	Rc 1	46		93.9			914.7
	KKA8S-12F	Rc1 1/4	50		99.2			1,002.1
1 1/4	KKA9S-10F	Rc 1	63	69	121.8	25.1	344.9	1,919.1
	KKA9S-12F	Rc1 1/4			121.8			1,810.0
	KKA9S-14F	Rc1 1/2			121.8			1,732.6

Without Check Valve

Without check valve, female thread type dimensional drawing

(Unit: mm)

Body Size	Model	T Connection Port Diameter	H Width Across Flats	φD	L	Minimum Hole Diameter	Effective Cross-sectional Area mm²	Weight g
1/8	KKA3S-01F-1	Rc 1/8	17	18.5	37.6	6.1	23.4	44.5
	KKA3S-02F-1	Rc 1/4	17		41.2			44.8
	KKA3S-03F-1	Rc 3/8	19		43.1			49.9
1/4	KKA4S-02F-1	Rc 1/4	22	24.2	46.1	8.1	41.2	92.2
	KKA4S-03F-1	Rc 3/8	22		46.9			86.2
	KKA4S-04F-1	Rc 1/2	24		52.3			99.4
1/2	KKA6S-03F-1	Rc 3/8	30	30.7	50.5	11.4	81.6	178.8
	KKA6S-04F-1	Rc 1/2			56.2			191.2
	KKA6S-06F-1	Rc 3/4			57.9			169.8

Structural Drawing

Socket structural drawing

KKA series structural drawing

Number	Part Name	Material	Note
1	Socket body	SUS304	-
2	Socket rear body	SUS304	-
3	Socket valve	SUS304	-
4	Collar	SUS304	Fluorine coating
5	Sleeve	SUS304	Plated with material containing fluorine
6	Valve O-ring	Special FKM	Fluorine coating
7	Plug O-ring	Special FKM	Fluorine coating
8	Socket body O-ring	Special FKM	Fluorine coating
9	Collar seal	Special FKM	Fluorine coating
10	Collar spring	Equivalent to SUS304	KKA3, KKA4, KKA6
10	Collar spring	SUS304	KKA7, 8, 9
11	Sleeve spring	SUS304	-
12	Steel ball	SUS304	-
13	Stopper ring	SUS304	-

Flow Rate Characteristics

Air

Plug: with check valve / socket: with check valve

Plug: without check valve / socket: with check valve

Plug: with check valve / socket: with check valve

Plug: without check valve / socket: without check valve

Notes

*Please check the individual safety precautions for each product.
*Please refer to the manufacturer's catalog for product information not provided above.