How to use asphalt heat pump properly

First, the specific selection method of asphalt heat pump:
The action mode of the asphalt heat preservation pump The choice of the action mode of the asphalt pump is only when the pneumatic actuator is selected. Its action mode is formed by combining the positive and negative action of the actuator and the positive and negative action of the valve. There are four types of combination: positive (air-type), positive-negative (open-type), positive-type (air-open type), and reverse-reverse (air-closed type). Open and air off two. For the choice of the way of action of asphalt pump, it mainly considers three aspects:
(1) process production safety;
(2) characteristics of the medium;
(3) Ensure product quality and economic loss.
Second, asphalt heat pump selection in the specific choice, can be considered from the following aspects:
(1) The valve core shape structure is mainly based on selected flow characteristics and unbalanced forces.
(2) Wear resistance When the fluid medium is a suspension containing a high concentration of abrasive particles, the valve core and the valve seat interface are severely rubbed each time they close. Therefore, the flow path of the valve should be smooth, and the internal material of the valve should be hard.
(3) Corrosion resistance Due to the corrosive nature of the medium, a valve with a simple structure can be selected as far as possible while satisfying the adjustment function.
(4) Temperature and pressure of the medium When the temperature and pressure of the medium are high and the change is large, the valve whose valve core and valve seat materials are affected by the temperature and pressure change should be selected.
(5) Preventing flashing and cavitation Flashing and cavitation are only produced in liquid media. In the actual production process, flashing and cavitation not only affect the calculation of the flow coefficient, but also create vibration and noise, so that the service life of the valve is shortened. Therefore, the valve should be prevented from flashing and cavitation when selecting the valve.
III. Overview of Asphalt Heat Pump: The asphalt pump consists of actuators and valves.
Compressed air is used as the power source. For all kinds of corrosive liquids, liquids with particles, liquids with high viscosity, volatile, flammable, and highly toxic can all be pumped out. It is suitable for being placed in various special occasions and used for pumping media that cannot be pumped by conventional pumps.
Asphalt thermal pump actuators include pneumatic actuators and electric actuators. The models are QBY pneumatic asphalt pump and DBY electric asphalt pump. Asphalt pump body (valve body) has four kinds of materials: plastic, aluminum alloy, cast iron, stainless steel, respectively, according to the requirements of liquid or gas medium selection. Asphalt pump diaphragm is also based on different liquid media using nitrile rubber, chloroprene rubber, fluorine rubber, polyvinylidene fluoride, poly four six vinyl material, so need to specify the media type when ordering.