First, the multifunctional pump control valve function requires <br> <br> usually in order to ensure the normal operation of the pump, centrifugal pump water supply and drainage project in the most commonly used pumps. The water outlet pipe of the water pump is equipped with three kinds of valve parts: gate valve, check valve and water hammer eliminator. These three valve parts play different roles in the operation of the water pump: the valve is normally closed. When the pump starts, the valve opens slowly. When the pump stops, the valve closes slowly. The closing of the water pump and the closing and stopping of the brake can effectively prevent the water hammer of the pump from being turned on and stop the water hammer of the pump. At the same time, the motor load at the start of the water pump is reduced, and the shaft power of the water pump at the zero flow rate is the smallest, generally only the design axis. 30% of power. Another function of the gate valve is that when the gate valve is closed, it can provide safe inspection conditions for the valve and water pump, such as the check valve installed between the gate valve and the pump, to prevent backflow of water from the pressure pipe; the check valve can prevent sudden power off. The flow direction of the water flow caused by the time is changed to prevent backward flow; however, the sudden closing of the check valve is liable to produce a water hammer phenomenon. When the height of the pump's geometric lift is high, severe high-pressure hammers can cause pipeline rupture and serious production accidents. To prevent water hammer damage to water pipelines, water hammer eliminators are often installed on the pressure pipes of the pumps. In order to realize the automation of water pump operation, simplify management, reduce labor and improve reliability, people replace valves and electric valves with manual valves, and perform various technical improvements on the single valve, presenting slow-opening slow-closing check valves, slow motion Open and close hydraulic valves, automatic slow closing gate valves, two-speed self-closing valves and other new valves.
However, it is still unsatisfactory. The above measures have achieved certain results in application practice. The use of pressure sensing and electric drive to control more complex faults, the improvement of a single valve can not solve the main problem of automatic operation. Therefore, people have been working on the development of a valve that has the functions of three kinds of valve parts, a gate valve, a check valve, and a water hammer eliminator, so as to reduce the floor space while satisfying the above comprehensive requirements. JD745X multi-function water pump control valve is one of the better ones. It has the advantages of a multi-valve, reliable operation, simplified operation, easy maintenance and automatic operation according to the operation requirements of the water pump. It is very popular among users.
Operating pressure greater than or equal to O.1MPa medium temperature at 080 °C, slow closing time can be adjusted within 3-90, the pressure loss of the pipe flow rate 2ms is less than 0.01MPa, this type of multi-function pump control valve operating pressure is divided into 1. 0MPa and 1.6MPa 2.5MPa three. Water hammer peak working pressure less than 1.5 times, nominal diameter DN50-DNl0000
Second, the basic configuration of a main valve and <br> <br> exterior accessories. Among them, the overall size of the valve is equivalent to an ordinary check valve. The main valve includes a valve body, a pressure plate and a diaphragm, a large valve plate, a slow closing valve plate, a valve seat, a stem assembly and the like. The valve stem assembly of the slow closing valve plate is connected with the pressure plate and the diaphragm, and the diaphragm is pressed between the valve cover and the diaphragm seat. The up and down motion of the diaphragm drives the slow closing valve to move up and down. The valve stem passes through the center hole of the large valve plate, so that the large valve plate can slide along the valve stem within a certain range. At ordinary times, the large valve plate is pressed against the valve seat under the pressure of its own weight and the upper compression spring, so that the valve is closed. The external accessories of the multifunctional water pump control valve are installed on both sides of the valve diaphragm and the inlet and outlet pipes of the valve. The control valve, the filter and a special counter-stop are installed on the connecting pipe of the lower cavity of the diaphragm and the inlet side of the valve. valve. Only the filter and a control valve are provided on the connecting pipe of the upper chamber of the diaphragm and the outlet side of the valve. The movement and the position of the large valve plate and the slow closing valve plate in the main valve determine the change and opening and closing of the valve working state. The external accessories and piping of the valve convey the pressure changes before and after the valve at any time to the upper and lower chambers in the valve that are divided by the diaphragm to control the movement of the large valve plate and the slow closing valve plate, and the large valve plate can be changed by adjusting the accessories. Relieve the operating speed of the valve plate so that the opening and closing times of the valve are within the specified range.
Third, the principle <br> <br> multifunctional pump control valve in the pump start - automatically closed discusses the following working principle of their work: stop the pump and the state of the valve plate on the inlet end of the separator chamber at a static pressure All closed.
Door Accessories
Door accessories include Automatic Door Kits , High Speed Door Motor And Control Box, High Speed Door Accessories, Other Door Accessories. We can sell any parts of these accessories.
Automatic door kits: Our automatic door kits include 1 motor+gear reducer, 1 belt,7 meter, 1 idle pulley, Microprocessor, 4 sets of carriage blue wheels, 2 sets of floor guides,2pcs remote control, 2 sets belt clamp mounting brackets, 1 power supply harness and cable connectors, 2 locator, Aluminum track whose length is 2.08 meter, 3 meter, or 4 meter. We are a manufacturer of automatic door openers that are designed to provide people convenience. Automatic Door Systems` drive to provide that level of service is but one of the reasons why automatic doors are becoming more and more popular. Our Automatic Sliding Door systems are modern, space-saving and elegant. Automatic sliding doors have many basic functions some of which include: automatic mode with full opening width and/or reduced opening width, and exit only for traffic control. The opening of automatic doors can also be adjustable to make the opening width smaller or larger. Important safety functions such as safety sensors prevent the door from shutting if persons or objects are in the detection zone. If the door leaves are inhibited when closing, they are immediately re-opened or if the door leaves are hindered when opening, they are immediately stopped by a safety automatic reversing mechanism.
High Speed Door motor and control box: Our company have German SEW Motor, Japan Mitsubishi Controller. Our own brand Hofic servo motor and controller. Chinese famous brand SEJ motor and Holip controller. German SEW Motor and Japan Mitsubishi Controller: It is easy to find the ideal energy-efficient motor for your application at SEW. Our rolling gate servo control system is suitable for high speed and high usage soft and hard rolling gate. The whole system is in a small and light package, it has high torque and high operating speed, lower noise, high reliability, smooth and soft operating curves, it`s suitable for high speed and usage environment. SEJ motor and Holip controller: Three-phase asynchronous motor with magnetic brake has broad uses, It is suitable for various mechanical main drive and auxiliary drive, and it is also used for various required rapid stopping and correct positioning.
high speed door accessories: Driving system: High speed door Servo System motor and control, motor SNMA / SEJ +reducer+flang+encoder+control box. Other accessories: Middle aluminium bar, bottom aluminium bar, aluminium vertical track, stainless steel vertical track, brushes,round nylon strip, PVC roll, rolling steel tube complete, drum be;;s for rolling tube, side end covers, stainless steel cover, steel tubes, air bag sensor system, safety light beam, Microwave sensor 24 Gigahertz,PVC welding machine, smoke and fire sensors, PVC transparent window, magnetic loop, photocell, remote control, manual push button, sound warning alarm Led lamp traffic light.
Other door accessories: Sectional door accessories: motor 220V-380V, control box, spring break device, cable break device , aluminum alloy rope pulley, enhanced shaft bracket, air bag system, duplex enhanced guide wheel bracket.
For accessories detail information, please kindly check our detail classify.
Door Accessories,Automatic Door Kits,High Speed Door Accessories,Sliding Door Operator
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.spiralfastdoor.com