I. Overview 4D-SY3.5,4D-SY35 electric test pump is an electric four piston reciprocating type test pump, designed for all kinds of pressure vessels, piping valves, boiler systems, such as hydraulic test machine and laboratory obtain ideal high pressure liquid. The working medium is water, emulsion or kinematic viscosity of not more than 45mm2 / s oil. Working environment 5 ℃ ~ 60 ℃. Working parameters are as follows: Model 4D-SY / 3.5MPa 4D-SY / 35MPa Rated flow pressure MPa 3.5 35 L / h high pressure 560 low pressure during 1120 when 44 high pressure low pressure 592 mm 46 high-pressure cylinder piston diameter 13 mm stroke low-pressure cylinder 46 67 min-1 42 times reciprocating motor parameters power 3KW, speed 1450r / min Dimensions L × W × H mm 1020 × 470 × 1335 Weight kg 215 Second, the structural description of the pump from the motor is transmitted through the worm shaft flexible coupling. In the worm shaft with two eccentrics, and the slider through the effect of the conductor, the circular motion into reciprocating motion. Four plunger connected to the conductor, by the slowdown symmetrical on both sides of the box was fixed in the form of four tanks. Gearbox base mounted on the tank, the lower part of the tank is equipped with four mobile wheel. Outlet of the pump is equipped with a safety valve, the factory has been adjusted, the test pressure exceeds a predetermined value, the valve automatically opens, to avoid accidents. As a relief valve can not use, is strictly prohibited users to freely adjust the safety valve. Third, the operating instructions 1, before driving preparatory work: (1) Check deceleration lubricating oil tank, to keep the target level in the oil center position. (2) Check that the media is clean, does not allow the use of waste water containing sediment to avoid clogging pipes, worn out valve plunger or make Mifengbuyan cause a malfunction. (3) Check and tighten around the plug; select the appropriate pressure gauge attached to the (working pressure gauge is not more than 2/3) on the cylinder. (5) to be tested in a container with a pump connected; check the circuit insulation and safety. 2. Operation: (1): Open Unicom valve (the handle is in the horizontal position), start the motor, when a large water tank pressure effect does not occur. First the exhaust valve opens, until the exhaust valve drainage, pump operation, no abnormal situation, and then close the exhaust valve. After the pump is operating normally, Unicom closed valve (handle sagging position). In this case four cylinders work simultaneously subjected to a charge of water. After observing water-filled pressure gauge value, when the pressure reaches 2.8MPa, open Unicom valve (handle horizontal position), two high-pressure cylinders work alternately, so that the pressure slowly rise. After the pressure (2) to achieve the required parking packing, container inspection subjects. (3) Note: The gearbox should be in operation even without noise, noise and blocking phenomenon; gearbox oil should be kept below 80 ℃, the maximum does not exceed 85 ℃; at work, such as leaks and repair work should be stopped the water does not allow sediment fiber and other debris; should be kept within a certain air cylinders to alleviate the pressure of the pump pulse by the gauge; overpressure is absolutely not allowed.