Abstract: A drain valve assembly includes a valve housing having an inlet port and an outlet port and a water collection chamber between the inlet port and the outlet port, and a poppet valve positioned in the water collection chamber and arranged to be normally sealingly positioned across the outlet port to prevent water exiting the water collection chamber to the outlet port. The poppet valve is attached to a pressure diaphragm across the water collection chamber such that when the pressure in the water collection chamber exceeds a predetermined opening pressure it causes the diaphragm to lift and to lift the poppet out of sealing engagement across the outlet port such that water can drain to the outlet port from the water collection chamber. The poppet valve has a hollow body defining a channel from a first end of the poppet valve.

Abstract: A vane for use in a rotary vane pump. The vane has a length L extending between a first edge of the vane and a second edge of the vane and a width W extending perpendicular to said length, the width extending between a third edge of said vane and a fourth edge of the vane, and further comprising a channel extending through said vane and provided at a position along said length L of said vane. The channel maybe positioned away from said first and second edges such that said vane has a constant length L along its width. The width of the channel may vary in shape between first and second points along the length of the vane. The channel may have a triangular shape, a rectangular shape or a circular shape. A method for detecting the decrease in length of the vane is also described.

Abstract: A drain valve assembly includes a valve housing having an upper section and a lower section and a poppet valve positioned in the housing and extending between the lower section and the upper section. The poppet valve is arranged to fluidly seal the lower section from the upper section, the poppet valve in the water collection chamber being arranged to be normally sealingly positioned across the outlet port to prevent water exiting the water collection chamber to the outlet port. The poppet valve is attached to the pressure diaphragm in the upper section.

Abstract: A vane for use in a rotary vane pump. The vane has a length L extending between a first edge of the vane and a second edge of the vane and a width W extending perpendicular to said length, the width extending between a third edge of said vane and a fourth edge of the vane, and further comprising a channel extending through said vane and provided at a position along said length L of said vane. The channel maybe positioned away from said first and second edges such that said vane has a constant length L along its width. The width of the channel may vary in shape between first and second points along the length of the vane. The channel may have a triangular shape, a rectangular shape or a circular shape. A method for detecting the decrease in length of the vane is also described.

Abstract: A vane for use in a rotary pump “R” a first portion P1 having a first thickness T1 and a second portion P2 which has a second thickness T2 that is greater than the first thickness T1. In some examples, the vane has an L-shaped cross-section. In other examples, said second portion P2 has a circular cross-section.

Abstract: A drain valve assembly includes a valve housing having an inlet port and an outlet port and a water collection chamber between the inlet port and the outlet port, and a poppet valve positioned in the water collection chamber and arranged to be normally sealingly positioned across the outlet port to prevent water exiting the water collection chamber to the outlet port. The poppet valve is attached to a pressure diaphragm across the water collection chamber such that when the pressure in the water collection chamber exceeds a predetermined opening pressure it causes the diaphragm to lift and to lift the poppet out of sealing engagement across the outlet port such that water can drain to the outlet port from the water collection chamber. The poppet valve has a hollow body defining a channel from a first end of the poppet valve.