Mechanical seal products in zhejiang province in 2018 selectives examination results released information

Mechanical seal products in zhejiang province in 2018 information release 2019 - selectives examination results 04 - 19 in the near future, according to 'product quality law of the People's Republic of China', 'zhejiang province product quality supervision and regulation of the zhejiang province bureau of quality and technical supervision organization to carry out the supervision and spot check of mechanical seal products, the spot check of jiaxing, jiaxing, taizhou, wenzhou 4 regions 32 32 batches of mechanical seal products, unqualified batch, batch is not qualified rate is 0. 2018 mechanical seal products selectives examination results summary table release time: October 2018 consumer guide: 1, to buy ( 1) To choose on the outer packing production enterprise information such as address, phone number, executive standard complete products. When buying, view product accessories such as inspection certificate, specification is complete. （ 2) Mechanical seal according to the working conditions and the properties of medium, there are high temperature resistant, resistant to low temperature mechanical seal, mechanical seal, high pressure resistance and corrosion resistance of granules medium mechanical seal and adapt easy vaporization of the mechanical seal of light medium and so on, should according to the different use to select different structure and materials of mechanical seal. Selection of main parameters are: sealing cavity pressure ( MPa） , fluid temperature ( ℃) , working speed, m/s） , the characteristics of the fluid and install sealed effective space, etc. The basic principles of selection for: a. According to sealed cavity pressure, seal structure is balanced or unbalanced, single or double face, etc. b。 According to the working speed, determination by rotating or stationary type, the hydrodynamic pressure type and non-contact type. c。 According to the temperature, and fluid properties, determine the friction pair and auxiliary sealing material, as well as the correct selection of lubrication, flushing, insulation, cooling and other mechanical seal protection system etc. d。 According to install sealed space effectively, with more spring or single spring or waveform spring, built in or outside the container type. （ 3) Mechanical seal is the implementation of the production license management products, when the choose and buy, should buy licensed products. 2, install installation method according to the mechanical seal type, the type of machine is different, but the main point is almost the same installation, the installation steps and matters needing attention are as follows: ( 1) When installation, should according to the instructions on the use of the products or samples, to ensure that the mechanical seal installation size. ( 2) Before loading, axis ( Collar) , gland should be no burr, bearing in good condition; Seal, shaft, sealing cavity, gland should be cleaned. In order to reduce frictional resistance, and shaft installed on the part of the mechanical seal to thin coated with a layer of oil, for lubrication, considering the intermiscibility of rubber o-ring, if not oil, but with soap and water. Without a stop pin float mounted static ring structure, should not be oiled, into the gland should be dry. ( 3) Static ring first installed on the shaft with gland, be careful not to into the shaft, then ring component loading operation. Spring bridge or transmission of the set screws should be evenly tighten several times. Before his fixed gland of compensation loop for axial compression with the hand, can loosen after compensation ring back automatically, no jam phenomenon, then put the gland bolts evenly lock. 3, use ( 1) When the temperature of the medium to high, low, or containing impurity particles, inflammable, explosive, toxic, must adopt corresponding resistance sealing and flushing, cooling, filtering, and other measures. ( 2) Turning by hand before operation, pay attention to whether the torque is too big, any scratch and abnormal sound. （ 3) Pay attention to the direction of rotation is correct, whether the coupling of the bearing parts such as lubricating oil additive is appropriate. （ 4) Operation, first open the medium, the cooling water valve, check the discharge gas seal cavity, to prevent leaks by static pressure, and then switched on. （ 5) Driving to work after normal stable, have without shaft rotation caused by abnormal torque, as well as the abnormal noise and overheating. （ Source: zhejiang province pledges inspect bureau)