A pinch valve sleeve is used for reducing the pressure of fluid flowing therethrough with or without actuation of the valve's pinching mechanism. The valve sleeve features an elongated hollow flexible resilient elastomeric sleeve body having an inner surface circumferentially bounding a flow-through passage and peripheral flanges at both ends suitable for attachment to a section of a pipeline or conduit system.

Pinch valve also known as a clamp valve, is an elastomeric tube or sleeve, which can be squeezed at its mid-section by some mechanical system until ultimately the tube walls are pinched or clamped together producing full closure of the flow path. In its simplest form, it consists merely of a length of elastomeric tube fitted with a pinch bar mechanism incorporating a closure stop to prevent over-pinching of the tube. Usually the molded rubber tube is housed in a metal body, which also incorporates the pinching mechanism. This can be a simple screw operated mechanism, where the pinch is applied only to one side of the tube, or a differential screw controlling two pinching mechanisms working in vertical opposition. The latter produces lower stress working of the tube.

Pinion gear boxes are equipped with double oil seals on shaft extensions, lubrication lines for the bearings and oil splash system for the gears.