Double Shut-Off
Nominal Diameter
5 = 20 mm²
RECTUS Series
21KD
Chart
Technical Description
Mini industrial coupling, the world‘s most commonly used profile. Above average flow performance for liquid and gaseous media. It also uses an additional safety locking system. This prevents unintentional disconnection. When being disconnected, the plug must first be pushed further into the coupling before it can be disconnected.

Advantages
Small dimensions. The safety locking system prevents unauthorized disconnection.

Dust Caps
for coupling Part.-No. SK16S
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 -20°C and above +100°C special seals are available on request.
Material

Coupling
Standard
Back Body
Valve Body
Sleeve
Valve
Spring and Locking Ring
Locking Balls
Seals
Brass, Nickel Plated
Brass, Nickel Plated
Brass, Nickel Plated
Brass
AISI 301
AISI 420
NBR
Plug
Plug Profile
Back Body
Valve
Spring
Seal
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
Male Thread
G 1/8 14 36 16 7 Standard 21KDAW10MPN
G 1/4 17 38 16 9 Standard 21KDAW13MPN
G 3/8 19 38 16 9 Standard 21KDAW17MPN
                     
Female Thread
Female Thread
G 1/8 14 36 16 9 Standard 21KDIW10MPN
G 1/4 17 38 16 9 Standard 21KDIW13MPN
G 3/8 19 38 16 9 Standard 21KDIW17MPN
                     
Hose Barb
Hose Barb
6 mm 14 46 16 17 Standard 21KDTF06MPN
10 mm 14 46 16 17 Standard 21KDTF10MPN
                     
                     

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 Standard 21SDAW10MPN
G 1/4 17 42 9 Standard 21SDAW13MPN
G 3/8 19 42 9 Standard 21SDAW17MPN
                     
Female Thread
Female Thread
G 1/8 14 40 7 Standard 21SDIW10MPN
G 1/4 17 42 7 Standard 21SDIW13MPN
                     
                     

Valved Plugs

  Connection A Hex SW L mm D mm L1 mm L2 mm Hex1 SW B mm G mm Version Part Number
Hose Barb
Hose Barb
6 mm 14 50 17 Standard 21SDTF06MPN
10 mm 14 50 17 Standard 21SDTF10MPN