Electric two-way valve principle and installation: 1 electric two-way valve used to control the cold water or hot water air conditioning system pipe opening or closing, to achieve the purpose of controlling the room temperature 2. The drive by a single-phase hysteresis synchronous motor drive, valve spring reset, When the valve does not work in the normally closed state, when the need for work, by the thermostat to provide a turn on signal to enable the electric two-way valve connected to the AC power and action 3 .. Open the valve, chilled water or hot water into the fan coil, When the room temperature reaches the set value of the thermostat, the thermostat causes the electric two-way valve to be powered off and the return spring to close the valve, so as to cut off the flow of water entering the fan coil, close and open the valve through the valve, The room temperature is always maintained in the temperature set temperature range. 4..VA7010 series electric two-way valve drive and valve with threaded connection, the valve can be installed, and then install the drive. Field assembly, flexible wiring, convenient. The planar design of the drive can be installed close to the wall, occupying a small footprint, reliable and durable products, low noise and reliable work in the high temperature and humidity environment in the coiled fan coil unit. Electric two-way valve installation and commissioning: Before installation must read the instructions, cut off the power and must be installed by professional and technical personnel. The flow direction must be the same as the direction of the arrow on the valve body. The valve body must be above the coil water tray to ensure that dripping falls into the water tray. The valve body and actuator must be mounted within ± 60 ° C vertical and at least 30 mm above the space for disassembly. With the surrounding pipelines, equipment, buildings must maintain sufficient space for maintenance operations, must be installed in the maintenance personnel through the manhole to reach the place. The valve body can be installed after pressure test and pressure test. If the actuator is already attached to the valve body, never apply force to the actuator during installation and commissioning as this may damage the actuator. After installation and check the correct, power debugging. At a minimum, observe the three full drive cycles and verify that all components are correct. After passing through the anhydrous test, pass the water test. System pressure drop on the water must be strictly controlled within 0.15MPa, to ensure that the electric control valve on the effectiveness of the water switch. Electric two-way valve scope of application: air conditioning, heating, ventilation, domestic hot water and other civil-level chemical, petroleum Metallurgy, light industry and other industries in the production process of automatic control.
Rock wool board, also known as rock wool thermal insulation decorative board, Stone Wool Board for Heat Insulation, is an inorganic fiber board made of basalt as the main raw material through high temperature melting processing. It was successfully tested in June, 1981. Rock wool board is a new type of thermal insulation, flame-proof and sound-absorbing material.Rock Wool Board is widely used in petrochemical, textile metallurgy, power transportation, construction agriculture and other fields.
The artificial inorganic fiber made of rock wool board by high temperature melting process has the characteristics of light weight, small thermal conductivity, heat absorption and incombustibility. The initial development is a common type of application in construction, which is mostly used in industrial buildings. It should meet the requirements of "Application Types and Basic Requirements of Building Thermal Insulation Materials". Rock wool is a kind of external insulation material. When the market share of 90% of the organic thermal insulation materials is stagnant, rock wool, as an inorganic thermal insulation material for exterior wall, has ushered in an unprecedented market opportunity.
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