Valve maintenance of the top ten matters needing attention: (1) must first identify the valve, the downstream pipe does remove the pressure, to disassemble and disassemble operation. (2) non-metallic parts should be removed from the cleaning agent immediately after cleaning, not for a long time immersion. (3) The flange bolts must be symmetrical, tighten gradually and evenly. (4) The cleaning agent should be compatible with the rubber parts, plastic parts, metal parts and working medium (such as gas) in the valve. Working medium for gas, gasoline (GB484-89) can be used to clean metal parts. Non-metallic parts with pure water or alcohol cleaning. (5) Disassembled individual parts can be cleaned by dipping. Non-metallic parts that remain undistracted may be cleaned with a clean, fine, silk-dipped detergent cloth (to prevent the fibers from sticking to the parts). Cleaning to remove all adhesion on the wall of grease, dirt, glue, dust and so on. (6) Disassembly and reassembly must be done with care to prevent damage to the sealing surfaces of parts, especially non-metallic parts. Special tools should be used when removing o-rings. (7) After cleaning, it needs to be assembled after the wall surface cleaning agent is volatilized (it can be rubbed with silk cloth without cleaning agent), but it should not be shelved for a long time; otherwise, it will rust and be polluted by dust. (8) New parts also need to be cleaned before assembly. (9) Lubricate with grease. Grease and valve metal materials, rubber parts, plastic parts and working medium are compatible. When the working medium is gas, for example, special 221 grease. Apply a thin layer of grease to the surface of the seal mounting groove and a thin layer of grease on the rubber seal. Apply a thin layer of grease to the sealing and friction surfaces of the valve stem. (10) The assembly should not allow metal debris, fiber, grease (except for the provisions of the use of) dust and other impurities, foreign body pollution, adhesion or stay on the surface of the parts or into the cavity.
The blade of a cutter knife is very sharp, and there are several parallel scribe lines on its blade. Because it is usually used to cut wallpaper, it is also called a "wallpaper cutter". Cutter knife is usually used in the decoration and advertising plaque industry. The biggest feature of the cutter knife is that it can be easy to replace the segmented blades. You can fold off the unsharp section of blade when using it, so the sharpness can be maintained without sharpening the blade frequently.
Cutter knife,Utility knife,plotter knife
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