The Z series is identical to the S series: the only difference is in the kind of the materials.
MB began in 1956 to produce, on his own drawings, these screwon quick-release couplings in stainless steel: they are very popular
in Italy but they are also well known abroad. Now MB is the only producer in the world of the all sizes.
Mechanical strength and the impossibility of an accidental release of the male from the female make very safe the use of these screwon
couplings: they are very suitable in heavy hydraulic applications where there is also the problem of the corrosion from an aggressive
environment and/or an aggressive fluid inside the couplings. The Z series is mainly used in industrial,chemical,oil and naval fields.
Interchangeability: according to MB internal standard
Shut-off system: poppet valve
Latching system: screw-on
Connection: screwing-on the male’s sleeve
Disconnection: screwing-off the male’s sleeve
Connectability: allowed under residual pressure
Disconnection under pressure: allowed under residual pressure
Threads: BSP
Sizes: 1/4" , 3/8”, 1/2”, 3/4”, 1”, 1 ¼”, 1 ½”, 2”,2.1/2”, 3”
Materials: Female in stainless steel AISI 316
Sleeve and male in stainless steel
AISI 316
Valve in stainless steel AISI 316
Surface treatment:
electrolytic polishing
Springs in stainless steel
Seals: standard VITON, on request NBR
Antiextrusion rings: PTFE
Working Temperatures: NBR -20°C +100°C
VITON -15°C +180°C
