21KB: RECTUS GmbH: Quick Coupling Division Europe

Double Shut-Off

Nominal Diameter
5 = 20 mm²

RECTUS Series
21KB

Chart

Technical Description

Mini industrial coupling, internationally the most common profile for this nominal diameter, in double shut-off design. Above average flow performance for liquid and gaseous media. Large band width in materials and valve variants.

Advantages

Single handed operation. Small dimensions. Reliable design.

Working Pressure

PB = 35 bar, maximum static
working pressure with safety
factor of 4 to 1.

Working Temperature*

-20°C up to +100°C (NBR)
-40°C up to +120/150°C (EPDM)
-15°C up to +200°C (FKM)
0°C up to +316°C (FFKM)
depending on the medium.

*At a temperature below
0°C and above +316°C special
seals are available on request.

Material Coupling	Standard	Nickel Plated
Back Body Valve Body Sleeve Valve Spring and Locking Ring Locking Balls Seals	Brass Brass Brass Brass AISI 301 AISI 420 NBR	Brass, Nickel Plated Brass, Nickel Plated Brass, Nickel Plated Brass AISI 301 AISI 420 NBR
Plug
Plug Profile Back Body Valve Spring Seal	Brass Brass Brass AISI 301 NBR	Brass, Nickel Plated Brass, Nickel Plated Brass AISI 301 NBR

Couplings

	Connection A	Hex SW	L mm	D mm	L1 mm	L2 mm	Hex1 SW	B mm	G mm	Version	Part Number
Male Thread	G 1/8	14	36	16	7					Standard	21KB AW10 MPX
	G 1/8	14	36	16	7					Nickel Plated	21KB AW10 MPN
	G 1/4	17	38	16	9					Standard	21KB AW13 MPX
	G 1/4	17	38	16	9					Nickel Plated	21KB AW13 MPN
	G 3/8	19	38	16	9					Standard	21KB AW17 MPX
	G 3/8	19	38	16	9					Nickel Plated	21KB AW17 MPN
	M 10 x 1	14	37	16	8					Standard	21KB AD10 MPX
	M 10 x 1	14	37	16	8					Nickel Plated	21KB AD10 MPN
	M 12 x 1,5	17	39	16	10					Standard	21KB AD12 MPX
	M 12 x 1,5	17	39	16	10					Nickel Plated	21KB AD12 MPN
	M 14 x 1,5	17	39	16	10					Standard	21KB AD14 MPX
	M 14 x 1,5	17	39	16	10					Nickel Plated	21KB AD14 MPN
Female Thread	G 1/8	14	36	16	9					Standard	21KB IW10 MPX
	G 1/8	14	36	16	9					Nickel Plated	21KB IW10 MPN
	G 1/4	17	38	16	9					Standard	21KB IW13 MPX
	G 1/4	17	38	16	9					Nickel Plated	21KB IW13 MPN
	G 3/8	19	38	16	9					Standard	21KB IW17 MPX
	G 3/8	19	38	16	9					Nickel Plated	21KB IW17 MPN
	M 12 x 1,5	17	38	16	6					Standard	21KB IM12 MPX
	M 12 x 1,5	17	38	16	6					Nickel Plated	21KB IM12 MPN
	M 14 x 1,5	17	38	16	6					Standard	21KB IM14 MPX
	M 14 x 1,5	17	38	16	6					Nickel Plated	21KB IM14 MPN
Front Panel Installation Plastic Hose Panel Mount	4 x 6 mm	22	42	24	7	16	24	5	M 20 x 1	Standard	21KB KE06 MPX
	4 x 6 mm	22	42	24	7	16	24	5	M 20 x 1	Nickel Plated	21KB KE06 MPN
	6 x 8 mm	22	42	24	7	16	24	5	M 20 x 1	Standard	21KB KE08 MPX
	6 x 8 mm	22	42	24	7	16	24	5	M 20 x 1	Nickel Plated	21KB KE08 MPN
Plastic Hose Connection with Spring Guard	4 x 6 mm	14	125	16	7	6			M 10 x 1	Standard	21KB KK06 MPX
	4 x 6 mm	14	125	16	7	6			M 10 x 1	Nickel Plated	21KB KK06 MPN
	6 x 8 mm	14	130	16	7	6			M 10 x 1	Standard	21KB KK08 MPX
	6 x 8 mm	14	130	16	7	6			M 10 x 1	Nickel Plated	21KB KK08 MPN
Plastic Hose Connection	4 x 6 mm	14	42	16	7	6			M 10 x 1	Standard	21KB KO06 MPX
	4 x 6 mm	14	42	16	7	6			M 10 x 1	Nickel Plated	21KB KO06 MPN
	6 x 8 mm	14	42	16	7	6			M 12 x 1	Standard	21KB KO08 MPX
	6 x 8 mm	14	42	16	7	6			M 12 x 1	Nickel Plated	21KB KO08 MPN
Front Panel Installation, Hose Barb Panel Mount	4 mm	22	46	24	17	16	24	5	M 20 x 1	Standard	21KB TE04 MPX
	4 mm	22	46	24	17	16	24	5	M 20 x 1	Nickel Plated	21KB TE04 MPN
	6 mm	22	46	24	17	16	24	5	M 20 x 1	Standard	21KB TE06 MPX
	6 mm	22	46	24	17	16	24	5	M 20 x 1	Nickel Plated	21KB TE06 MPN
	9 mm	22	46	24	17	16	24	5	M 20 x 1	Standard	21KB TE09 MPX
	9 mm	22	46	24	17	16	24	5	M 20 x 1	Nickel Plated	21KB TE09 MPN
	10 mm	22	46	24	17	16	24	5	M 20 x 1	Standard	21KB TE10 MPX
	10 mm	22	46	24	17	16	24	5	M 20 x 1	Nickel Plated	21KB TE10 MPN
Panel Mount, Plastic Hose Connection	4 x 6 mm	14	54	16	7	18	14	4	M 10 x 1	Standard	21KB KS06 MPX
	4 x 6 mm	14	54	16	7	18	14	4	M 10 x 1	Nickel Plated	21KB KS06 MPN
	6 x 8 mm	17	54	16	7	18	17	4	M 12 x 1	Standard	21KB KS08 MPX
	6 x 8 mm	17	54	16	7	18	20	4	M 12 x 1	Nickel Plated	21KB KS08 MPN
Hose Barb	4 mm	14	46	16	17					Standard	21KB TF04 MPX
	4 mm	14	46	16	17					Nickel Plated	21KB TF04 MPN
	5 mm	14	46	16	17					Standard	21KB TF05 MPX
	5 mm	14	46	16	17					Nickel Plated	21KB TF05 MPN
	6 mm	14	46	16	17					Standard	21KB TF06 MPX
	6 mm	14	46	16	17					Nickel Plated	21KB TF06 MPN
	8 mm	14	46	16	17					Standard	21KB TF08 MPX
	8 mm	14	46	16	17					Nickel Plated	21KB TF08 MPN
	9 mm	14	46	16	17					Standard	21KB TF09 MPX
	9 mm	14	46	16	17					Nickel Plated	21KB TF09 MPN
	10 mm	14	46	16	17					Standard	21KB TF10 MPX
	10 mm	14	46	16	17					Nickel Plated	21KB TF10 MPN
	6 mm Parker	14	46	16	17					Standard	21KB TP06 MPX
	6 mm Parker	14	46	16	17					Nickel Plated	21KB TP06 MPN
Panel Mount, Hose Barb	4 mm	14	60	16	17	14	14	4	M 10 x 1	Standard	21KB TS04 MPX
	4 mm	14	60	16	17	14	14	4	M 10 x 1	Nickel Plated	21KB TS04 MPN
	5 mm	17	60	16	17	14	17	4	M 12 x 1	Standard	21KB TS05 MPX
	5 mm	17	60	16	17	14	17	4	M 12 x 1	Nickel Plated	21KB TS05 MPN
	6 mm	17	60	16	17	14	17	4	M 12 x 1	Standard	21KB TS06 MPX
	6 mm	17	60	16	17	14	17	4	M 12 x 1	Nickel Plated	21KB TS06 MPN
	8 mm	17	60	16	17	14	17	4	M 12 x 1	Standard	21KB TS08 MPX
	8 mm	17	60	16	17	14	17	4	M 12 x 1	Nickel Plated	21KB TS08 MPN
	9 mm	17	60	16	17	14	19	4	M 12 x 1	Standard	21KB TS09 MPX
	9 mm	17	60	16	17	14	19	4	M 12 x 1	Nickel Plated	21KB TS09 MPN

Valved Plugs

	Connection A	Hex SW	L mm	L1 mm	L2 mm	Hex1 SW	B mm	G mm	Version	Part Number
Plastic Hose Connection with Spring Guard	4 x 6 mm	14	130	7	6			M 10 x 1	Standard	21SB KK06 MPX
	4 x 6 mm	14	130	7	6			M 10 x 1	Nickel Plated	21SB KK06 MPN
	6 x 8 mm	14	135	7	6			M 12 x 1	Standard	21SB KK08 MPX
	6 x 8 mm	14	135	7	6			M 12 x 1	Nickel Plated	21SB KK08 MPN
Plastic Hose Connection	4 x 6 mm	14	46	7	6			M 10 x 1	Standard	21SB KO06 MPX
	4 x 6 mm	14	46	7	6			M 10 x 1	Nickel Plated	21SB KO06 MPN
	6 x 8 mm	14	46	7	6			M 12 x 1	Standard	21SB KO08 MPX
	6 x 8 mm	14	46	7	6			M 12 x 1	Nickel Plated	21SB KO08 MPN
Panel Mount, Plastic Hose Connection	4 x 6 mm	14	58	7	18	12	3	M 10 x 1	Standard	21SB KS06 MPX
	4 x 6 mm	14	58	7	18	12	3	M 10 x 1	Nickel Plated	21SB KS06 MPN
	6 x 8 mm	17	58	7	18	17	4	M 12 x 1	Standard	21SB KS08 MPX
	6 x 8 mm	17	58	7	18	17	4	M 12 x 1	Nickel Plated	21SB KS08 MPN
Hose Barb	4 mm	14	50	17					Standard	21SB TF04 MPX
	4 mm	14	50	17					Nickel Plated	21SB TF04 MPN
	5 mm	14	50	17					Standard	21SB TF05 MPX
	5 mm	14	50	17					Nickel Plated	21SB TF05 MPN
	6 mm	14	50	17					Standard	21SB TF06 MPX
	6 mm	14	50	17					Nickel Plated	21SB TF06 MPN
	8 mm	14	50	17					Standard	21SB TF08 MPX
	8 mm	14	50	17					Nickel Plated	21SB TF08 MPN
	9 mm	14	50	17					Standard	21SB TF09 MPX
	9 mm	14	50	17					Nickel Plated	21SB TF09 MPN
	10 mm	14	50	17					Standard	21SB TF10 MPX
	10 mm	14	50	17					Nickel Plated	21SB TF10 MPN
	6 mm Parker	14	54	20					Standard	21SB TP06 MPX
	6 mm Parker	14	54	20					Nickel Plated	21SB TP06 MPN
Panel Mount, Hose Barb	4 mm	14	64	17	14	14	4	M 10 x 1	Standard	21SB TS04 MPX
	4 mm	14	64	17	14	14	4	M 10 x 1	Nickel Plated	21SB TS04 MPN
	6 mm	14	64	17	14	17	4	M 12 x 1	Standard	21SB TS06 MPX
	6 mm	14	64	17	14	17	4	M 12 x 1	Nickel Plated	21SB TS06 MPN
	8 mm	14	64	17	14	17	4	M 12 x 1	Standard	21SB TS08 MPX
	8 mm	14	64	17	14	17	4	M 12 x 1	Nickel Plated	21SB TS08 MPN
	10 mm	14	64	17	14	19	4	M 14 x 1	Standard	21SB TS10 MPX
	10 mm	14	64	17	14	19	4	M 14 x 0	Nickel Plated	21SB TS10 MPN

Valved Plugs

	Connection A	Hex SW	L mm	L1 mm	Version	Part Number
Male Thread	G 1/8	14	40	7	Standard	21SB AW10 MPX
	G 1/8	14	40	7	Nickel Plated	21SB AW10 MPN
	G 1/4	17	42	9	Standard	21SB AW13 MPX
	G 1/4	17	42	9	Nickel Plated	21SB AW13 MPN
	G 3/8	19	42	9	Standard	21SB AW17 MPX
	G 3/8	19	42	9	Nickel Plated	21SB AW17 MPX
	M 10 x 1	14	41	8	Standard	21SB AD10 MPX
	M 10 x 1	14	41	8	Nickel Plated	21SB AD10 MPN
	M 12 x 1,5	17	43	10	Standard	21SB AD12 MPX
	M 12 x 1,5	17	43	10	Nickel Plated	21SB AD12 MPN
	M 14 x 1,5	17	43	10	Standard	21SB AD14 MPX
	M 14 x 1,5	17	43	10	Nickel Plated	21SB AD14 MPN
Female Thread	G 1/8	14	40	7	Standard	21SB IW10 MPX
	G 1/8	14	40	7	Nickel Plated	21SB IW10 MPN
	G 1/4	17	42	7	Standard	21SB IW13 MPX
	G 1/4	17	42	7	Nickel Plated	21SB IW13 MPN
	G 3/8	19	42	7	Standard	21SB IW17 MPX
	G 3/8	19	42	7	Nickel Plated	21SB IW17 MPN
	M 12 x 1,5	17	42	7	Standard	21SB IM12 MPX
	M 12 x 1,5	17	42	7	Nickel Plated	21SB IM12 MPN
	M 14 x 1,5	17	42	7	Standard	21SB IM14 MPX
	M 14 x 1,5	17	42	7	Nickel Plated	21SB IM14 MPN