valve head

(redirected from valve heads)

valve head

[′valv ‚hed]
(mechanical engineering)
The disk part of a poppet valve that gives a tight closure on the valve seat.
References in periodicals archive ?
Time limit for receipt of tenders or requests to participate: Lot 1 - adjustable nozzles Lot 2 - Valve needle Lot 3 - Valve heads eruption for Lot 4 - Gate valves Lot 5 - Lot 6 ball valves - Check valves
This allows complex multi-layered and multi-port flow paths to be established using a simple to construct modular valve body arrangement and conventional valve heads.
Finally Cataclean cleans the upper cylinder valve heads and stems resulting in improved compression and reduced valve sticking.
The pump head with welded non-return valves and the valve heads are made of 1.
Defective valve heads will have only six full threads.
4 engines with ACERT Technology and electronic fuel management systems feature four valve heads and a choice of single or multiple vee-belt front-end drives.
The V-8's three valve heads are smaller than the previous engine's two-valve heads, reducing weight.
I have also modified it to take part in hill climbs and sprints - it has large valve heads, Dellorto carburettors and various other go-faster mods.
The cylinder liners were cast iron, as were the pistons, valve heads and flywheel.
For example, Coates has constructed prototype valve heads to fit on two-, four-, and six-cylinder engines.
The 1100 is equipped with a lightened air-cooled, 1078 cc Desmo motor, with 2 valve heads, six speed box and a dry clutch.