SOLENOID-OPERATES PNEUMATIC VALVE Russian patent published in 2006 - IPC F16K31/02 

FIELD: valving.

SUBSTANCE: valve comprises the main vale that is made in block with the piston which has charging and discharging passages. The valve is also provided with the pilot valve having two face seals and seats. The first seat is mounted in the discharging passage of the main valve. The valve additionally has electromagnetic drive and mechanism for forces opening of the main valve. The second seat for the seal of the pilot valve is mounted in the charging passage of the main valve. The mechanism for forced opening of the main valve comprises pusher and pilot valve. The pusher and pilot valve cooperate with the second seat of the discharging passage of the main valve.

EFFECT: enhanced reliability.

1 dwg