Poppet Valves
ZNCN / 700, ZNCN / 1300
Features:
Air pressure operated spring return valves, normally closed.
Simple, rugged design. Ideal for hydro pneumatic locking circuits.
Technical Data:
Port Size : ZNCN/728, ZNCN/738 : G 3/4
ZNCN/1328, ZNCN/1338 : G 1/2
Flow : G 1/2 (Cv) : 4.1
G 3/4 (Cv) : 6.85
Operating Pressure :
ZNCN/738 AND ZNCN/1338 : 0-10 bar
ZNCN/728 AND ZNCN/1328 : 0-760 bar
Vacuum :
Pilot ZNCN/1328 : 1400 - (0.55 X vacuum mm Hg) m bar
Pilot ZNCN/728 : 2.0 - (5.0 X vacuum bar)
Pilot ZNCN/1338 : 1.3 + (0.5 X supply pressure) bar
Pilot ZNCN/738 : 2.0 + (0.5 X supply pressure) bar
Operating temperature : 0oC to + 80oC

These 2 port poppet valves fullfill many requirements not coverd by other types of valves. They are simply on-off valves and two are required to operate a single acting cylinder. A double acting cylinder would require four valves. Two port valves are particularly suitable for locking purpose on hydro-pneumatic circuits, in whice case the port connection is reversed.

The valves for vacuum use are identical to the others, except that the seal on the poppet is reversed.

A feature of these valves is the isolation of the pilot chamber from the main supply, by a vent to atmosphere.

Ordering Information:
To order quote model number in table, eg.ZNCN/1338 for a G 1/2 model for normal mains pressure.
Model No Type Port PilotPort A B C D E F G Spares Kit
ZNCN/1328 2/2 vac G 1/2 G 1/8 89 96 42 46 52 32 6.5 ZQNCN/1328/00
ZNCN/1338 2/2 press G 1/2 G 1/8 89 96 42 46 52 32 6.5 ZQNCN/1328/00
ZNCN/728 2/2 vac G 3/4 G 1/4 105 103.5 50 60 60 38 8.5 ZQNCN/728/00
ZNCN/738 2/2 press G 3/4 G 1/4 105 103.5 50 60 60 38 8.5 ZQNCN/728/00