nonreturn valve


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nonreturn valve

[¦nän·ri′tərn ‚valv]
(mechanical engineering)

nonreturn valve

A combination check valve and globe valve used at the discharge of a high-pressure boiler.

nonreturn valve

nonreturn valveclick for a larger image
nonreturn valveclick for a larger image
Presentation of non-scanning radar as used in terrain avoidance radar. Aircraft maintains pre-set height and warning of obstructions which are at a pre-set slant range away is indicated as shown above.
A valve that permits the full flow of fluid in one direction only.
References in periodicals archive ?
Screw Conventional Conventional Mixing Nonreturn Valve Conventional Sleeve Mixer Conventional Cushion (avg.
Of course, if you spot broken or chipped flights or nicks in the nonreturn valve or screw tips, these are likely sources of black streaks and must be replaced.
Options: SK-II Control--special nonreturn valve actuated by reverse twist of screw before start of injection.
Options: SK-IT Control--special nonreturn valve actuated by reverse twist of screw before start of injection.
On the other had, a screw speed that is too fast can mechanically destroy the nonreturn valve when molding high-viscosity materials on a screw with a relatively long metering section.
The Tc40 also supports the patent-pending "active" nonreturn valve on this machine.
However, a special screw with nonreturn valve in lieu of the smear tip is available for BMC processing, reportedly providing excellent shot control without damage to reinforcing fibers.
As for the first problem, there is a check valve at the front of the screw, where it transitions to the plunger, but the valve is actually the same design used in Md Plastics' Mini-Shut shutoff nozzles rather than its nonreturn valves. This is a poppet valve that is spring loaded with Belleville washers.