What is a metering pump?

Metering pump, also known as quantitative pump or proportional pump. Dosing pump is a kind of special volume pump which can meet the needs of a variety of strict process flow, the flow can be steplessly adjusted within the range of 0-100% and used to transport liquid (especially corrosive liquid). Metering pump can be divided into: 1. According to the over-current part (1) Plunger, piston type (2) Mechanical diaphragm type (3) Hydraulic diaphragm type 2. According to the drive method (1) Motor drive Working mode (1) Reciprocating type (2) Rotary type (3) Gear type 4, According to the characteristics of the pump (1) Extra large base (2) Large base (3) Medium base (4) Small base (5) Block Other classification: Electronically Controlled, Pneumatic Control, Insulation, Heating, High viscosity metering pump principle and structure of the pump structure of the pump from the motor, gearbox, cylinder and other three parts composition. Gear box components by the worm gear mechanism, stroke adjustment mechanism and the crank link mechanism; by adjusting the hand wheel to adjust the high-adjustment stroke, from the surface to change the eccentricity of the moving axis to achieve the purpose of the plunger (piston) stroke. Cylinder block is composed of pump head, suction valve group, discharge valve group, plunger and packing seal. 2. Working principle The motor drives the worm through the coupling and slows down the worm gear to make the spindle and the eccentric rotate for rotation. The eccentric drives the reciprocating movement of the bow type sliding rod in the connecting rod. When the plunger back dead point shift, the pump cavity gradually evacuated, the suction valve opens, inhalation of liquid; when the plunger moves forward dead center, then the suction valve is closed, the discharge valve opens, the liquid in the plunger to further Excretion during exercise. In the pump reciprocating work to form a continuous pressure, the amount of liquid discharge. 3. Flow adjustment features Pump flow adjustment is by rotating the adjustment hand wheel, driven by the adjustment screw rotation, thereby changing the spacing between the bow-type link, change the plunger (piston) in the pump chamber to determine the size of the mobile stroke. Adjust the handwheel scale determines the plunger stroke, the accuracy rate of 95%. 4, the pump features 1. The pump performance is superior, including diaphragm metering pump absolutely not leaked, high safety performance, accurate measurement and delivery, the flow can be from zero to the maximum range of fixed value can be adjusted, the pressure can be from atmospheric pressure to the maximum allowable Any choice within the scope. 2. Adjustments Intuitive and clear, stable work, no noise, small size, light weight, easy maintenance, can be used in parallel. 3. The pump variety, full performance, for transport -30 degrees to 450 degrees, the viscosity of 0-800mm / s, the maximum discharge pressure up to 64Mpa, the flow range of 0.1-20000 L / h, measurement accuracy within ± 1% . 4. According to process requirements of the pump can be manually adjusted and frequency control flow, but also to achieve remote control and computer automation.

The aluminum-clad profile is based on the main uPVC profile, with aluminum on the outside, steel lining in the middle and multi-cavity design structure used for door and window production. The new kind aluminum-clad system window was first unveiled in 2014, technology comes from Germany. It improved the direct connection between the aluminum plate and the plastic profile and replaced the nylon material connector with a direct connection of aluminum and plastic. The door and window can achieve more perfect mechanical properties; at the same time, the aluminum-clad system window uses TPE strip instead of EPDM strip to ensure that the strip never falls off. Lumei independently developed and designed out 70mm aluminum clad uPVC profiles and successfully applied the national patent.

The aluminum-clad door and window is made of uPVC resin as the main raw material and the outer side is coated with aluminum profile. Then the steel lining is fixed on the uPVC profile by screwing, the multi-channel sealing strip and the original hardware are matched with high technical standards. It becomes a highly energy-efficient system.

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