Concept techno structures offers electronic automatic drain valves [model hdv-151], are high discharge drain valves. These drain valves specially suitable for removing condensate having sludge and rust laden from compressed air systems. These drain valves find most suitable application for installation on compressors [after-coolers], dryers, receivers, drip legs, moisture separators, etc. Features include: fully automatic, no maintenance 12 mm orifice manual test switch indication for valve healthiness easy to replace specially suitable for drain sludge and rust laden condensate glass-filled nylon coil former a-ring seal on cycle adjustment pots to ensure weatherproof sealing small compact resistant abs timer and no tool required to replace timer.