Importance

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Abstract

A pressure reducing and regulating valve having a body with a body cavity and a seal container movable in the cavity. The container includes primary and vent seals. At least one flow plate is positioned in the body adjacent the container and includes primary, secondary and vent ports. The improved seal container has the primary and vent seals positioned in the container on opposite sides of the central axis of the container, allowing the container and thus the body to be of a smaller size, thereby reducing the pressure forces applied against the interior of the body. The primary and vent seals are spaced on opposite sides of the central axis at locations for reducing the side loading forces acting around the central axis as the container is moved. An adjustable screw engages a spring for adjusting the pressure flow through the valve and the screw includes one or more metal washers on each side of a shoulder on the screw coated with low friction material whereby the shoulder can be easily backed off from engagement with the body.

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First Claim