A backflow preventor which permits adjustment of the outflow direction is provided.

A conduit (228) provides fluid communication between the two valves of the backflow preventor.

The valve also comprises a vacuum relief component consisting of a movable weight (7) and a flame arrestor (6).

A non-return device (24) equipped with detent pawl (25) is provided for one of the reels (5).

The invention relates to a return-preventing device for preventing return kick of a first spring-loaded furniture piece.

The gap between the drilling and the filler body is produced with a large tolerance such as not to fulfil the requirements of a flame arrestor.

This first furniture piece is pivotingly mounted on a second furniture piece.

The invention relates to an insert for a detonation/flame arrester to be fitted in flame arresting fittings of technical devices or directly in the pipe.

The receiving space opens into the through channel of a tip (10) arranged at the foot end of the tubular casing, and a nonreturn device consisting of at least two spring wires (23) projects into the receiving space.

An encoder is installed onto the rotor shaft or embedded in the rotor bearing and cannot be used simultaneously with a brake or a backstop.

The plate valve (10) which is configured in the circular shape forms in the centre an elastic valve element (11) which interacts, in the installed state, with a control opening (8) in the housing (2), and forms a return stop.

In the event of a sudden reduction in pressure, e.g. due to a leak in the system downstream, the closure member (38) switches to the closed position and is held in place by an on-return means, e.g. a magnet (32, Figure 2).

ISO 15996:2005 specifies requirements for residual pressure valves, with or without a non-return function, for gas cylinders and the methods of testing such valves, for type approval.