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Published byNehemiah Prall Modified over 2 years ago

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Multi-ratio pump Extends cylinder under moderate load with high flow Flow Pressure Low Ratio Mode Note: If slides do not advance automatically, use the left mouse button or left arrow key

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Multi-ratio pump Extends cylinder under moderate load with high flow Flow Pressure Low Ratio Mode

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Multi-ratio pump Extends cylinder under moderate load with high flow Flow Pressure Low Ratio Mode

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Multi-ratio pump Extends cylinder under moderate load with high flow Flow Pressure Low Ratio Mode

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Multi-ratio pump Extends cylinder under moderate load with high flow Flow Pressure Low Ratio Mode

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Multi-ratio pump Extends cylinder under moderate load with high flow Flow Pressure Low Ratio Mode

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Multi-ratio pump Extends cylinder under moderate load with high flow Flow Pressure Low Ratio Mode

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Multi-ratio pump Extends cylinder under moderate load with high flow Flow Pressure Low Ratio Mode

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Multi-ratio pump Extends cylinder under moderate load with high flow Flow Pressure Low Ratio Mode

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Multi-ratio pump Extends cylinder under moderate load with high flow Flow Pressure Low Ratio Mode

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Multi-ratio pump Extends cylinder under moderate load with high flow Flow Pressure Low Ratio Mode When resistance is met, pump kicks into high pressure mode KDRV Open High Ratio Mode

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Multi-ratio pump Extends cylinder under moderate load with high flow Flow Pressure Low Ratio Mode KDRV Open High Ratio Mode

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Multi-ratio pump Extends cylinder under moderate load with high flow Flow Pressure Low Ratio Mode KDRV Open High Ratio Mode

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Multi-ratio pump Extends cylinder under moderate load with high flow Flow Pressure Low Ratio Mode KDRV Open High Ratio Mode

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Multi-ratio pump Extends cylinder under moderate load with high flow Flow Pressure Low Ratio Mode KDRV Open High Ratio Mode Click to advance to next slide

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Air Pressure In Exhaust Tank KDRV (Closed) CVS1 CVP1 CVP2 Click to advance to next slide The cylinder moves rapidly under low load using the area of the hydraulic piston rod Multi-ratio pump – how it works Oil Pressure Out (Low Ratio)

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Air Pressure In Exhaust Tank KDRV (Open) CVS1 CVP1 CVP2 When resistance is met and pressure builds, KDRV opens and fluid on the push stroke goes back to the tank. Click to advance to next slide

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Oil Pressure Out (High Ratio) Air Pressure In Exhaust Tank KDRV (Closed) CVS1 CVP1 CVP2 On the pull stroke, the KDRV is closed to allow for fluid to fill on the push side. The ratio on this stroke is based on the piston diameter minus the rod diameter During the pull stroke, the fluid exits in the high mode Pull area based on piston dia. – rod dia. A A Sec. AA Click to advance to next slide

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Multi-ratio Pump Example The air piston diameter = 3.569 in The hydraulic rod diameter =.798 in The hydraulic bore diameter = 0.874 in The air piston area = /4 x D 2 = 10 in 2, The hydraulic rod area = 0.5 in 2 The hydraulic bore area = 0.6 in 2 The ratio on the push stroke is 10/0.5 = 20:1 The ratio on the pull stroke is 10/(0.6-0.5) = 100:1 This pump will act like a 20:1 unit until the KDRV opens and then it will perform as a 100:1 unit Click to advance to next slide

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Multi-ratio pumps allow for rapid cylinder extension with a high flow, low ratio mode at low to moderate loads, employing the high pressure mode only when needed at the end of the stroke KDRV Open Low Ratio Mode High Ratio Mode Flow Pressure Pressure vs. Flow Multi-ratio Pump Click to advance to next slide

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Performs functions of two pumps Saves time and energy Conserves compressed air Flows to 6 GPM Pressures to 10,000 psi Summary of Multi-Ratio Pumps: Click to start over…

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