Ram pump how does it work
The water flows through the delivery valve into a chamber full of compressed air, which sits at the bottom of a second pipe, called the delivery pipe. The delivery valve closes, and the waste valve reopens.
Water is then distributed to households, business, and farms on-demand using a gravity-fed pipe system. Here is a link to a video that explains the Hydram system in detail. We do not own the rights to the video. Do you have questions about hydrams? Our highly experienced field team would be happy to answer them. Contact us at getintouch renewable-world. Hydram technology is a fantastic renewable energy solution! This is why we put communities at the centre of our work. We work with them from day one to create a long-term vision and management plan.
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How does a hydraulic ram pump work? Ram pumps have been around for many decades and are popular for two main reasons: They need no external source of power -- the force of moving water gives them the power they need. They are extremely simple, with just two moving parts. Once the water reaches its maximum speed, this valve slams shut. As it slams shut, the flowing water develops a great deal of pressure in the pump because of its inertia.
The pressure forces open a second valve. Drive Pipe - Heavy gauge galvanised steel or cast iron is best. Burying prevents tampering by animals or people. Ideally the drive pipe should have a length of at least times its own diameter. The drive pipe must generally be straight; any bends will not only cause losses of efficiency, but will result in strong fluctuating sideways forces on the pipe which can cause it to break loose.
Excess Water Valve - The cycling of the hydram is timed by the characteristic of the waste valve. Normally it can be weighted or pre-tensioned by an adjustable spring, and an adjustable screwed stop is generally provided which will allow the maximum opening to be varied.
The efficiency, which dictates how much water will be delivered from a given drive flow, is critically influenced by the valve setting. This is because if the waste valve stays open too long, a smaller proportion of the throughput water is pumped, so the efficiency is reduced, but if it closes too readily, then the pressure will not build up for long enough in the hydram body, so again less water will be delivered.
There is often an adjustable bolt which limits the opening of the valve to a predetermined amount which allows the device to be turned to optimize its performance. A skilled installer should be able to adjust the waste valve on site to obtain optimum performance. Delivery Pipe - The delivery pipe can be made from any material capable of carrying the pressure of water leading to the delivery tank.
In all except very high head applications, plastic pipe can be considered; with high heads, the lower end of the delivery line might be better as steel pipe. The diameter of the delivery line needs to allow for avoiding excessive pipe friction in relation to the flow rates envisaged and the distance the water is to be conveyed. It is recommended that a hand-valve or check-valve non-return valve should be fitted in the delivery line near the outlet from the hydram, so that the delivery line does not have to be drained if the hydram is stopped for adjustment or any other reason.
This will also minimise any back flow past the delivery valve in the air chamber and improve efficiency. Impulse Valve - There are a number of types impulse valves that may be used.
The weighted-bolt-impulse valve is durable, easy to maintain, and the principles are easy enough for anyone to understand. Less weight means there will be a quicker stroke and less water pumped. More weight means slower strokes and more water pumped. Delivery Valve - Also known as a check valve W. Only allows fluid to travel one direction. Types of check valves include: ball, swinging, diaphragm, lift-check.
Pressure Vessel - A large surge in pressue from the water compresses the air inside the Pressue Vessel. This surge in pressure is known as the known as the water hammer effect W [8]. Water Source - Typically stream or spring. Must have adequate flow rate. Higher elevation is better more head.
Must be able to measure flow rate. For smaller flows one may contain water using a dam or containment area. It is necessary to prevent dirt and debris from entering the pump and drive pipe. Grates, Filters and often times a supply tank or sediment tank is used. Ram Housing - A security cover or housing may be prefered to prevent exterior damage or theft. The hydram body requires to be firmly bolted to a concrete foundation, as the beats of its action apply a significant shock load.
The hydram should be located so that the waste valve is always located above flood water level, as the device will cease to function if the waste valve becomes submerged. Reservoir Tank - A storage tank is usually included at the top of the delivery pipe to allow water to be drawn in variable amounts as needed. Multiple Hydrams - Where greater capacity is needed, it is common practice to install several hydrams in parallel. This allows a choice of how many to operate at any one time so it can cater for variable supply flows or variable demand.
The size and length of the drive pipe must be in proportion to the working head from which the ram operates. Also, the drive pipe carries severe internal shock loads due to water hammer, and therefore normally should be constructed from good quality steel water pipe. Hydrams are mostly intended for water supply duties, in hilly or mountainous areas, requiring small flow rates delivered to high heads.
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