1. Before installing the Solar water heater valve, carefully check whether the model and specifications of the Solar water heater valve used are consistent with the design; 2. Check whether the Solar water heater valve can be used under the required conditions according to the Solar water heater valve model and factory instructions; 3. When hoisting the Solar water heater valve, the rope should be tied to the flange connection between the Solar water heater valve body and the Solar water heater valve cover, and do not tie it to the handwheel or Solar water heater valve stem to avoid damage to the Solar water heater valve stem and handwheel; 4. When installing the Solar water heater valve on a horizontal pipeline, the Solar water heater valve stem should be vertically upward, and the Solar water heater valve stem is not allowed to be installed downward; 5. When installing the Solar water heater valve, do not use forced connection methods such as pulling or pulling to avoid damage due to uneven force; 6. Rising stem gate Solar water heater valves should not be installed in damp places underground to avoid rusting of the Solar water heater valve stem. Assembly requirements: The cleaned parts must be sealed and stored for installation. The requirements for the installation process are as follows:
1. The installation workshop must be kept clean, or a temporary clean area must be built, such as using newly purchased colored strips of cloth or plastic film, to prevent dust from entering during the installation process. 2. Assembly workers must wear clean cotton work clothes, wear a pure cotton hat, hair cannot be exposed, wear clean shoes, wear plastic gloves, and degrease. 3. Assembly tools must be degreased and cleaned before assembly to ensure cleanliness. Acceptance requirements: Acceptance follows HG 20202-2000 "Degreasing Engineering Construction and Acceptance Specifications". Before assembly, each component is wiped with clean precision filter paper, and the dead corners of the components are selected. The filter paper does not change color to be qualified.
Solar water heater valve specification requirements 1. The model of the Solar water heater valve should indicate the national standard number required. If it is an enterprise standard, the relevant description of the model should be indicated. 2. The working pressure of the Solar water heater valve is required to be ≥ the working pressure of the pipeline. Under the premise of not affecting the price, the working pressure that the Solar water heater valve can withstand should be greater than the actual working pressure of the pipeline. 3. The Solar water heater valve manufacturing standard should indicate the national standard number based on it. If it is an enterprise standard, the enterprise document should be attached to the purchase contract. Performance test requirements: 1. When a certain specification of the Solar water heater valve is manufactured in batches, an official agency should be entrusted to conduct the following performance tests: ① The opening and closing torque of the Solar water heater valve under the working pressure; ② The flow resistance coefficient of the Solar water heater valve under the condition of pipeline water delivery. 2. The Solar water heater valve should be tested as follows before leaving the factory: ① When the Solar water heater valve is open, the Solar water heater valve body should withstand an internal pressure test of twice the working pressure value of the Solar water heater valve; ② When the Solar water heater valve is closed, both sides withstand 11 times the working pressure value of the Solar water heater valve respectively, without leakage; but the leakage value of the metal-sealed butterfly Solar water heater valve is not greater than the relevant requirements. Sealing requirements: The sealing performance of the Solar water heater valve refers to the ability of each sealing part of the Solar water heater valve to prevent the leakage of the medium. It is the most important technical performance indicator of the Solar water heater valve. There are three sealing parts of the Solar water heater valve: the contact between the opening and closing parts and the two sealing surfaces of the Solar water heater valve seat; the matching part between the packing, the Solar water heater valve stem and the stuffing box; and the connection between the Solar water heater valve body and the Solar water heater valve cover. The leakage of the first one is called internal leakage, which is usually called loose sealing. It will affect the ability of the Solar water heater valve to cut off the medium. For cut-off Solar water heater valves, internal leakage is not allowed. The leakage of the last two parts is called external leakage, that is, the medium leaks from the inside of the Solar water heater valve to the outside of the Solar water heater valve. External leakage will cause material loss, pollute the environment, and cause accidents in serious cases. For flammable, explosive, toxic or radioactive media, external leakage is even more unacceptable, so the Solar water heater valve must have reliable sealing performance.
Other requirements: 1. The assembled Solar water heater valve should be purged with nitrogen for at least 1 minute. 2. The airtightness test must be performed with pure nitrogen.
3. After the airtight test is passed, the package is sealed with a clean polyethylene cap. The polyethylene cap should be soaked in an organic solvent and wiped clean before use. 4. Then seal it with a vacuum bag. 5. Finally pack it. 6. Take measures to ensure that the package is not damaged during transportation.
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