How to install metal pneumatic butterfly valve to make it easy to use
Pneumatic butterfly valve is a kind of small equipment to improve people's life quality. Do you know that pneumatic butterfly valve can use metal in addition to rubber materials? Although the metal pneumatic butterfly valve sounds strange, it is still very popular in the industry. Today, I will explain how the metal pneumatic butterfly valve can be installed to make it easier and more convenient to use!
1. During the construction of flexible rubber joint pipes, they must be kept in a natural state, and the products shall not be artificially deformed during installation.
2. When the pipeline medium is acid, alkali, oil, high temperature and other special data, the joint with a gear higher than the working pressure of the pipeline shall be selected.
3. Flange connecting rubber joint shall be valve flange or flange conforming to GB/T9115.1 (RF).
4. The normal applicable medium of the rubber joint is ordinary water with a temperature of 0-60 ° C. For special media such as oil, acid and alkali, high temperature and other corrosive and hard conditions, the corresponding special resistant rubber joint shall be selected. It cannot be used in series or in general.
5. When the rubber joint is used at the inlet and outlet of the water pump, it should be located at one side of the water pump, and a metal reducing joint should be installed between the rubber joint and the water pump, and the device should be located at the large diameter of the reducing diameter.
6. When the displacement of the pipeline is greater than or equal to the maximum compensation of the joint, the number of joints shall be increased to parallel the displacement. It is strictly prohibited to adjust the out of tolerance of the pipeline, so that the joint is in the extreme deflection displacement and deflection state, and it is not allowed to exceed the limit (expansion, displacement, deflection, etc.) for high-rise water supply or suspended water supply. The pipeline shall be fixed on the hanger, bracket or anchor bracket, The joint shall not accept the weight and axial force of the pipe itself.
7. When installing the rubber joint, the screw of the bolt shall extend to the outside of the joint, and the bolts on each flange end face shall be tightened repeatedly and evenly by diagonal pressure to avoid pressure deviation. Screw thread joints shall be tightened evenly with a standard wrench, and do not use an afterburner to force the movable joint to slip wires, slip edges and fracture. Moreover, regular inspection shall be carried out to avoid looseness, which may cause disc falling or water seepage.
8. After the rubber joint is subjected to the pressure for the first time (such as pressure test of the device) or before it is used again after being stopped for a long time, the bolt shall be re pressurized and tightened before it is put into operation.
9. When using or storing rubber joints, high temperature, ozone oil and acid-base environment shall be prevented. Sunshades shall be set up for pipes used outdoors or facing the sun against the wind. Sunshine, rain and wind are strictly prohibited. It is strictly prohibited to paint and wind insulation materials on the surface of the joint. Due to the aging problem of rubber products, they should be checked and replaced in time.

(1) The output of the electromagnetic flowmeter is only proportional to the uniform velocity of the measured medium, and has nothing to do with the activity condition (laminar flow or turbulent flow) under the symmetrical distribution. Therefore, the measuring range of electromagnetic flowmeter is extremely wide, and its measuring scale can reach 100:1, and some even reach 1000:1 operational flow scale.