Miniature valve for filling the reservoir of an apparatus...
Mixing adaptor with rupturable membrane
Mud saver kelly valve
Mud saver valve
Mud saver valve with increased flow check valve
Multifunctional valve and use of same in reaction control...
Multiple function CO.sub.2 valve
Non-pyrotechnic isolation valve element
Non-reclosing pressure relief device for vacuum systems
One shot valve
One-piece shut-off valve
Overpressure protector
Photo-electric burst disc indicator
Piercing valve stem assembly and system
Pilot operated rupture disk
Pipeline
Pipeline road crossing sealing system
Pipeline safety valve
Piston-activated valve and methods and apparatus for...
Plastic hydraulic hammer reduction system