43 results about "Zone valve" patented technology

The invention relates to a valve (2) for controlling a passage of particles from a first region (6) to a second region (7), wherein the valve (2) comprises a valve material (4) having a modifiable degree of penetrability and a valve region (16) comprising the valve material (4), wherein the valve region (16) and the valve material (4) are adapted such that the particles have to penetrate the valve material (4) if the particles pass the valve (2) for being transferred from the first region (6) to the second region (7). The degree of opening of the valve (2) can easily be controlled by modifying the degree of penetrability of the valve material (4), for example, by modifying the temperature of the valve material (4). Moreover, by penetrating the valve material (4) the particles can be separated from other elements like a fluid containing the particles.

An automated irrigation purge system utilizes a pressure purge method of discharging compressed air from a reservoir through selected irrigation zones with feedback from pressure switches to determine when to open and close each zone valve. No programming or user interaction is required beyond starting the system. The system can operate with a wide variety of irrigation systems, with varying number of zones, pipe lengths, pipe diameters, number and variety of sprinkler heads or outlets, and terrain slope. The system tracks the pressure transition time from high pressure to low pressure for each zone as it is blown out. When the current transition time is within a specified range from the previous transition time, the system knows the water has been sufficiently purged from that zone. The purge system can protect the irrigation system from high-pressure conditions, handle multiple error conditions, and maintain water valve settings during power loss.

The invention relates to the field of valve boxes, in particular to a medical gas area valve box. A box body, a controller, a first air inlet pipeline, a second air inlet pipeline, a third air inlet pipeline, a convergence air row, a gas pressure reduction adjusting valve, a flow dividing air row and an air conveying pipeline are included. The convergence air row and the flow dividing air row arein communication through the gas pressure reduction adjusting valve. The air outlet ends of the first air inlet pipeline, the second air inlet pipeline and the third air inlet pipeline communicate with the convergence air row, and the air inlet end of the air conveying pipeline communicates with the flow dividing air row. An air inlet air row is provided with a first air pressure sensor, and the convergence air row is provided with a second air pressure sensor. An emergency air supply pipeline is additionally arranged in the valve box, so that the medical gas source disconnection risk is reduced, each air supply pipeline can be manually opened, and accordingly, the medical gas source disconnection risk is further reduced; and a sound and light alarm can be used for guiding a worker to adjust the gas pressure reduction adjusting valve, and the air pressure value in the flow dividing air row conforms to the total air pressure value required by the opened air conveying pipeline.

An additive injection zone valve. A valve includes a valve body and a bolt. The valve body has an input port and an output channel connected by a main channel. The valve body has bolt holes aligned to intersect the primary passage. The valve body has a steering port provided at one end of the bolt hole. The valve body has an intersection point at the output channel and the main channel includes a gradual transition. The bolt has first and second ends aligned on a longitudinal axis. The bolt has a through channel aligned transversely with the longitudinal axis and has a deflection channel disposed between the side hole and the first end. The bolt is configured to slidably engage the bolt hole.

The invention relates to a vacuum valve (1) for closing a flow path (F) in an airtight manner by linear movement, the vacuum valve comprising: a closing member (5), which is linearly displaceable; a second part of the valve housing (2) A sealing surface (10), the first sealing surface closing the opening (3); and, a second sealing surface (11) of the closing member (5), the second sealing surface corresponding to the first sealing surface (10). In the closed position (C), the second sealing surface (11) is in sealing contact with the first sealing surface (10), said contact being pressed against the first sealing surface (10) in the closing direction (8), and the closing member ( 5) Close the opening (3) in an airtight manner. In the area between the opening (3) and the first sealing surface (10), the valve housing (2) comprises a first inclined surface (22) closing the opening (3), and the closing member (5) comprises a first inclined surface parallel to the first inclined surface (22) extends and corresponds to the second inclined surface (23) of the first inclined surface (22). The inclined surfaces ( 22 , 23 ) having an inclination angle ( 24 ) between 3 and 15 degrees relative to the geometrical adjustment axis ( 6 ) are positioned relative to each other such that in the closed position (C) of the closing member ( 5 ), p. The two inclined surfaces ( 23 ) are arranged in parallel positions opposite to the first inclined surface ( 22 ), and have a distance (v) of 0 to 0.6 mm between them.