valve head

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 ?
As-Schneider offers anti-tamper valve head units, which protect valves against unauthorised access.
Pressures at the combustion chamber and exhaust port channel are applied on the exhaust valve head surfaces with opposite sign.
The relationship between the exhaust valve head diameter and the valve stem diameter are shown in Figure 16.
The engine is a solid performer with a 90bhp output from just under 1,500cc and because it's an eight valve head the noise level is low when accelerating.
All of them simulate the VL fault using valve clearance change [16-21]; however, significant causes exist besides clearance that eventuate in VL such as valve head crack and valve head notch.
Newell did not explicitly state the reasoning for his comments, but they are believed to be the result of Microsoft's introduction of the Windows Store, which could compromise the openness of the platform according to the Valve head.
* The most basic model, the RV-E, includes only the valve head assembly for use with a system's preexisting stepper motors.
If it isn't using much or any salt, the problem is most likely a bad valve head, meaning the resin bed isn't getting recharged with brine water at all.
Two fillet radius to diameter ratio's R/D=0.2 and 0.3 were investigated and their influence on the flow behaviour were examined for the various valve seat and valve head configurations.
It was a minter back then, with big valve head, stainless steel exhaust, Spax shockers, braided hoses and Minilite alloys.
Look closely at the valve head for proper thread count.
This only left the safety valve to relieve the pressure situation, but it failed as scale had accumulated around the valve head and its seat.