Kind of valve motor low protection grade: electric device of the valve for all closed squirrel-cage motor layout, short-term intermittent things system ( 10 min) Since the cooling type. According to GB 4942. 1 - 85, the lowest grade IP44, highest grade IP68 protection. using difference, such as the working condition and situation require protection grade is also different. Protection grade low lumen will cause motor be affected with damp be affected with damp or dust and other foreign invasion, the motor insulation resistance landing cause damage. Packing, transportation and keeping wrong: valve denso packaging should be waterproof, moisture-proof, dustproof, packing should be strong and reliable. Transport process should rain, the product to the scene should be stored in drafty, dry place, not in open air. Yuhuan copper ball valve to control the rainy climate debug or test, after the debugging to tighten all fasteners, precision and reliable sealing valve for guaranteeing all electrical department types selection and schedule control wrong location mediation: electric valve is equipped with two stress parameters. (1) opening and closing torque value should cover the valve torque value and real things valve torque value itself, intrusive affect valve open-close torque to use, great strength is bad, force small easy to leak. Should have sufficient margin on selection of form a complete set, As valve usually requires greater than reality control torque value of 1. 1 ~ 1. 3 times) 。 (2) position control and valve diameter range, opening and closing time is and layout situation and so on. electric device of motor for the special motor, short time things, 10 - time 15min。 Like things in a short time, high load, resulting in heat insulation damage grade landing valves, denso and motor models don't stand room: the selected motor models do not stand with denso requirements, reality lose the moment did not leave enough corresponding allowance, when overload running motor damage easily cover electrical failure, poor quality of electrical components: valve types within the micro switch is the key component of the control mechanism, when the position above the valve stroke, micro switch block power, overload cover role. Most denso factory will travel with the torque in series with the cover when the stroke or ultra torque, micro switch, real-time blocking exchange war coil control power supply and to block the motor main circuit debugging placed using wrong: (1) the valve types are divided into level and vertical settlement. In the vertical settlement when the motor end in below. In thread sleeve rubber seal failure, the chamber of lubricating grease through cable and outlet into the motor internal cavity is easy to make the winding short circuit and burn out. (2) according to the JB - 8528 Hand wheel rotation of 1997 designated, electric actuator bias should be equal to output shaft rotation to, clockwise to close the valve, counterclockwise to open the valve. If the motor rotation to reality does not accord with designated, need to change the three-phase power of arbitrary two phase ( Exchange) 。 Otherwise due to the inverse, disable cover step motor damage. (3) due to the motor is valve for high load system of short time things. If debugging time is too long in a row above the rated time, lead to motor heat damage valve types with valves adjacent room: reversal came valve types are divided into more torque and thrust two kinds. Type torque mostly three jaw adjacent or key adjacent, denso don't suffer axial thrust of the valve. Most thrust type for the threaded connection, can suffer a large axial thrust. To valve types and does not produce interference between adjacent valve shaft; its flowerlike must limit Industrial Valves joint surface and electric valve is equipped with in line with the gap. Make placement on the output shaft of the worm shaft not jumped out to a, to ensure that the worm gear and worm central meshing plane mesh has the excellent result, guaranteeing torque reaches the rated output torque value. Motor temperature control failure: cover inside with temperature control switch, yuhuan copper Industrial Valves when the valve when the motor running between of torque or survive forever, the motor temperature rise, above the set temperature, temperature control switch immediately block the control loop, have the effect of motor cover. Set cycle running a raid system: valve types placed after debugging, should establish complete inspection system. Wing of needless between valve types, periodic testing of the motor stator winding insulation resistance value.
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