Home / Spare Parts / Tanker Spares / Parker Roller Pneumatic Manual Control Valve B53 Series, G G 1/4, III BParker Roller Pneumatic Manual Control Valve B53 Series, G G 1/4, III B Request a Quote Home / Spare Parts / Tanker Spares / Parker Roller Pneumatic Manual Control Valve B53 Series, G G 1/4, III BParker Roller Pneumatic Manual Control Valve B53 Series, G G 1/4, III B Request a Quote Product Code - WH103499 Parker Roller Pneumatic Manual Control Valve B53 Series, G G 1/4, III B Roller/Spring valves, B53 Series Stainless steel spool Viton body seals as standard Integral mounting holes 26 dm3/s at 7 bar Maximum flow rate 1740 l/min 22 mm Panel Hole Body ported connection