Dry-Break
Nominal Diameter
5 = 20 mm²
RECTUS Series
21KL
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. To be used in small applications like laboratories and chemical processes with aggressive mediums.

Advantages
Single handed operation. Small dimensions. Minimum (hardly noticeable) leakage occurs when disconnecting. Air is not trapped in during the connecting process.

Working Pressure
PB = 8 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)
depending on the medium.

*At a temperature below
-20°C and above +100°C special
seals are available on request.
Material

Coupling		 AISI 303 AISI 316L
Back Body
Valve Body
Sleeve
Valve
Spring and Locking Ring
Locking Balls
Seals
Inner Sleave
Seal bonnet		 AISI 303
AISI 303
AISI 303
AISI 303
AISI 301
AISI 316
FKM
AISI 303
AISI 303		 AISI 316 L
AISI 316 L
AISI 316 L
AISI 316 L
AISI 316 Ti
AISI 316
FKM
AISI 316 L
AISI 316 L
Plug
Plug Profile
Back Body
Valve
Spring
Seal		 AISI 303
AISI 303
AISI 303
AISI 301
FKM		 AISI 316 L
AISI 316 L
AISI 316 L
AISI 316 Ti
FKM

Couplings

  Connection A Hex SW L mm D mm L1 mm L2 mm Hex1 SW B mm G mm Version Part Number
Male Thread
Male Thread
 G 1/8 14 36 16 7 AISI 303 21KL AW10 RVX
G 1/8 14 36 16 7 AISI 316 L 21KL AW10 EVX
G 1/4 17 38 16 9 AISI 303 21KL AW13 RVX
G 1/4 17 38 16 9 AISI 316 L 21KL AW13 EVX
G 3/8 19 38 16 9 AISI 303 21KL AW17 RVX
G 3/8 19 38 16 9 AISI 316 L 21KL AW17 EVX
Female Thread
Female Thread
 G 1/8 14 36 16 9 AISI 303 21KL IW10 RVX
G 1/8 14 36 16 9 AISI 316 L 21KL IW10 EVX
G 1/4 17 38 16 9 AISI 303 21KL IW13 RVX
G 1/4 17 38 16 9 AISI 316 L 21KL IW13 EVX
Plastic Hose Connection
Plastic Hose Connection
 4 x 6 mm 14 42 16 7 6 M 10 x 1 AISI 303 21KL KO06 RVX
4 x 6 mm 14 42 16 7 6 M 10 x 1 AISI 316 L 21KL KO06 EVX
6 x 8 mm 14 42 16 7 6 M 12 x 1 AISI 303 21KL KO08 RVX
6 x 8 mm 14 42 16 7 6 M 12 x 1 AISI 316 L 21KL KO08 EVX
Panel Mount, Plastic Hose Connection
Panel Mount, Plastic Hose Connection
 4 x 6 mm 14 54 16 7 18 14 4 M 10 x 1 AISI 303 21KL KS06 RVX
4 x 6 mm 14 54 16 7 18 14 4 M 10 x 1 AISI 316 L 21KL KS06 EVX
6 x 8 mm 17 54 16 7 18 17 4 M 12 x 1 AISI 303 21KL KS08 RVX
                     
Hose Barb
Hose Barb
 5 mm 14 46 16 17 AISI 303 21KL TF05 RVX
6 mm 14 46 16 17 AISI 316 L 21KL TF06 EVX
8 mm 14 46 16 17 AISI 303 21KL TF08 RVX
8 mm 14 46 16 17 AISI 316 L 21KL TF08 EVX
9 mm 14 46 16 17 AISI 303 21KL TF09 RVX
9 mm 14 46 16 17 AISI 316 L 21KL TF09 EVX
10 mm 14 46 16 17 AISI 303 21KL TF10 RVX
10 mm 14 46 16 17 AISI 316 L 21KL TF10 EVX
Panel Mount, Hose Barb
Panel Mount, Hose Barb
 8 mm 17 60 16 17 14 17 4 M 12 x 1 Standard 21KL TS08 RVX
                     
                     
                     

Valved Plugs

  Connection A Hex SW L mm D mm L1 mm L2 mm Hex1 SW B mm G mm Version Part Number
Male Thread
Male Thread
 G 1/8 14 40 7 AISI 303 21SL AW10 RVX
G 1/8 14 40 7 AISI 316 L 21SL AW10 EVX
G 1/4 17 42 9 AISI 303 21SL AW13 RVX
G 1/4 17 42 9 AISI 316 L 21SL AW13 EVX
G 3/8 19 42 9 AISI 303 21SL AW17 RVX
G 3/8 19 42 9 AISI 316 L 21SL AW17 EVX
Female Thread
Female Thread
 G 1/8 14 40 9 AISI 303 21SL IW10 RVX
G 1/8 14 40 9 AISI 316 L 21SL IW10 EVX
                     
                     

Valved Plugs

  Connection A Hex SW L mm D mm L1 mm L2 mm Hex1 SW B mm G mm Version Part Number
Plastic Hose Connection
Plastic Hose Connection
 6 x 8 mm 14 46 7 6 M 12 x 1 AISI 303 21SL KO08 RVX
6 x 8 mm 14 46 7 6 M 12 x 1 AISI 316 L 21SL KO08 EVX
                     
                     
Panel Mount, Plastic Hose Connection
Panel Mount, Plastic Hose Connection
 4 x 6 mm 14 58 7 18 12 3 M 10 x 1 AISI 303 21SL KS06 RVX
4 x 6 mm 14 58 7 18 12 3 M 10 x 1 AISI 316 L 21SL KS06 EVX
6 x 8 mm 17 58 7 18 17 4 M 12 x 1 AISI 303 21SL KS08 RVX
                     
Hose Barb
Hose Barb
 5 mm 14 50 17 AISI 303 21SL TF05 RVX
5 mm 14 50 17 AISI 316 L 21SL TF05 EVX
6 mm 14 50 17 AISI 303 21SL TF06 RVX
6 mm 14 50 17 AISI 316 L 21SL TF06 EVX
8 mm 14 50 17 AISI 303 21SL TF08 RVX
8 mm 14 50 17 AISI 316 L 21SL TF08 EVX
10 mm 14 50 17 AISI 303 21SL TF10 RVX
10 mm 14 50 17 AISI 316 L 21SL TF10 EVX
6 mm Parker 14 54 20 AISI 303 21SL TP06 RVX