Deep Well Hand Pump

Salient Features : Ideal VLOM (Village Level Operation and maintenance) design developed keeping in view maintenance problems. Capable of lifting water from depths upto-approx 45 Metres. Fully fabricated steel structure duly hot dip galvanised. Adjustable handle to suit varying installation depths. Injection moulded special grade plastic bush bearings easy to replace at village level. Interchangeable plunger & foot valves easy to extract without removing riser pipe. Non-corrosive underground components capable of handling corrosive water situation there by giving longer life. Easy installation and inexpensive maintenance at village level-even women can handle. Light weight UPVC riser pipes and hence easy to handle. Pump Head Assembly Fully fabricated steel structure duly hot dip galvanised. Adjustable handle providing different handle settings to suit different Cylinder setting depths. Conical flange with conical rubber grommet provides better holding grip on UPVC riser pipe. Two options for pedestal design are available : Pedestal for concrete stand and Pedestal of India Mark II design with either 3 legs mounting or flange mounting arrangement. Fulcrum & rod hanger pins are supported on special grade plastic bush bearing which are very easy to replace at village level. Fully covered to avoid any contamination of water. Design offer a stroke length of 225 mm. Pump Body The cylinders of the Treadle pump are made from mild steel 2mm sheet, which are rolled around and subsequently arc welded, while the Mandrel remains inside the cylinder. This method produces cylinders, perfectly round & smother. The first part of the pump body is the valve plate, which is the top of the valve box to which the Cylinders are welded. The cylinders are placed at the centre on the valve box. This is done to provide room inside the cylinders for seating of the Inlet/Outlet valves. The whole body and other metal parts are hot dip galvanized to minimize the effect of rusting on the metal parts as these parts are always in contact with water. Pistons The pistons of the Treadle pump consist of two Rubber cups, which are held together by a z clamp at the end of the piston rod. A steel washer is placed between the two Rubber cups. The upper cup faces towards the top of the cylinder. It seals the Piston when the pump is acting on the suction stroke, while the Piston is moving upward. The lower cup faces towards the bottom of the cylinder, it seals the piston when the pump is acting on the Pressure stroke, while the piston is moving downward. Since the Rubber cups are flexible, they expand against the Cylinder as a result of atmospheric pressure (for the upper cup), and the pressure of the water inside the cylinder (for the lower cup), thereby sealing the piston. Valves Four rubber valves are used in the Treadle pump, (one Inlet and one Outlet valve in each cylinder) all the valves are simple Check valves which open/close in response to the water pressure acting upon them. The Outlet valve opens away from the cylinder and lets water out of the cylinder when the piston is moving down ward. The Inlet valve opens in to the cylinder and lets water in to the cylinder when the piston moves upward. The two Inlet valves draw water from the Inlet chamber of the valve box that connects it with the Intake pipe. The two Outlet valves discharge water into the outlet chamber, connected to the outlet pipe of the pump. Treadles Treadles are made of rectangle hollow pipe, with broad chequered plates, duly hot dipped galvanized to provide firm grip to user's foot. CAM & CHAIN ARRANGEMENT (FIG. A) A cam system has been introduced for up and down motion of Treadles. Cam is fabricated of mild steel plate/pipe with Plastic bush for free and friction less movement of Treadles. Chains are used to link treadles with pistons. Axle shaft made up of Mild Steel round is used with Plastic Bush for free movement of Cam & Chain arrangement. 5a. PULLEY & STEEL ROPE ARRANGEMENT (FIG.B) A pulley & steel rope system has been introduced for Up and down motion of Treadles. Pulley is made up of Cast Iron round for free and friction less movement of Treadles. Steel rope is used to link Piston. Treadles & Pulley fitted on Axle shaft of the fixed block. T-HANDLE T-Handle is made up of mild steel hollow pipe Round/Square duly of dipped galvanized. FOOT VALVE At several occasion, users find problems of "priming" in Treadle pumps during start up which consume great deal of their energy. This problem can be eliminated by using a foot valve at the bottom of Suction Hose. Operation Features : The Treadle pump follows the basic lifting principle of the hand pump. It consists of two barrels, pistons and treadles and is operated by one person, who manipulates his/her body weight on the Treadles. The discharge of water ranges between 1400 - 1600 liters Fig. A. and more than 1600 liters Fig. B. per hour. The pump is easy to install, requires little maintenance and can easily be repaired by the user. Minimum operating costs, as it requires no fuel or electricity. The SEFEX Treadle Pump effectively irrigates land holdings. SEFEX Treadle Pump is best suited to water levels less than 7m below the ground level & has a total pumping head of 15m. Its use is recommended to lift water from ground or surface water-rivers, ponds, streams, canals, wells etc. SEFEX Treadle Pump is one of the cheapest irrigation systems currently available. PEDALING TO PROSPERITY For millions of farmers the Treadle pump can bring a sea change to their lives. It gives them ownership of water-crucial for a successful harvest. It is more efficient, more affordable and most appropriate to their needs. It provides an assured access to water, freeing farmers from the vagaries of nature or erratic electric and diesel supply. A SHEAF OF BENEFITS Can push water uphill as well as simply pulling it from the source. Can be used on steep sloping land where the water source may be at the bottom. Ownership of water-crucial for a successful harvest. Greater efficiency than traditional methods. More affordable than diesel and electricity-driven pumps sets. Assured access to water without being subjected to the vagaries of nature and erratic electricity and diesel supply. Flexibility to grow a variety of crops, which have different irrigation needs. Easy operation in many cases the pump is owned and operated independently by women. Easy self-maintenance. Self-reliance a tool, which give farmers a just return on their labour. SPARE PARTS Following recommended spare parts are required with each pump for two years operation Piston Rubber Cups / Seal-4 Nos. Flap valves - 4 Nos. TOOLS AND ACCESSORIES Following recommended tools & accessories are required with each pump for two years operation : Engineering type screw driver (250mm) which would enable field maintenance of the pump - 1 No. Appropriate steel clamps of sufficient diameter to fix suction and delivery hoses-2 Nos. MANUALS One set of Installation, Operation and Maintenance manual in English language shall be supplied with each pump. HOSES RECOMENDED We recommended that the Pump should always be procured along with Suction & Delivery Hoses so that user receives right type of Hoses, in order to achieve more satisfactory performance. Please Note : "Sefex" make this pump complete with Suction & Delivery Hoses. We are well known for the quality products. We manufacture products related with Water management. We are exporting our products worldwide. "Sefex" is the first organization which was accredited with ISO certification for hand pump's manufacturing. Apart from hand pumps like India Mark II, India Mark III, Afridev, Malda, Walimi, Direct action Tara shallow well etc. "Sefex" also makes uPVC Casing pipes/ Strainers, Rigid PVC Pipes, Micro Irrigation systems etc. (including Rain Guns.) and Pressurized Galvanized Steel Treadle Pump to irrigate small area of crops. Presently "Sefex" is the only organization manufacturing Treading pumps complete with Suction & Delivery Hoses, under "Sefex" brand.