Installation method: 1) Remove the protective cover on both sides of the flange, the American standard ball valve fully open state for flushing and cleaning. 2) Pre-installation should be carried out according to the provisions of the signal (electrical or gas) 整机 test (to prevent the use of vibration due to transport performance), qualified before going on-line installation (wiring according to the electric actuator circuit). 3) Flush and remove residual contaminants from clean lines (these may cause damage to the seat and ball) before preparing for connection to the pipe. 4) During the installation, please do not use the actuator part of the valve as lifting lifting point to avoid damaging the actuator and accessories. 5) This type of valve - American Standard ball valve should be installed in the pipe horizontal or vertical direction. 6) The pipe near the installation point can not be lowered or subjected to external force. Pipe supports or supports can be used to eliminate the deviation of the pipelines. 7) After connecting with the pipe, cross-fasten the flange connecting bolt with the specified torque. Operation and use: 1) Make sure the pipelines and valves have been washed before operation. 2) Valve operation: The valve stem is rotated according to the input signal of the actuator. When the valve is rotated 1/4 turn (90 °) forward, the valve is shut off. The valve opens when rotated 1/4 turn (90 °) in the reverse direction. 3) The valve is open when the direction arrow of the implementing agency is parallel to the pipeline; the valve is closed when the indicating arrow is perpendicular to the pipeline. Maintenance methods: Long service life and maintenance free will depend on the following factors: normal working conditions, maintaining a harmonious temperature / pressure ratio, and reasonable corrosion data Caution: ◠When the ball valve is in the closed state, the valve body The internal pressure fluid still exists ◠maintenance before lifting the pipeline pressure and the valve is in the open position ◠maintenance before disconnecting the power or gas source ◠maintenance before the actuator and the stent from ◠must first identify the ball valve on the downstream pipe really Disassembly and disassembly can be carried out after the pressure has been removed ◠Disassembly and reassembly must be done to prevent damage to the sealing surface of parts, especially non-metallic parts, special tools should be used when removing the O-ring ◠The bolts on the flange must be symmetrical when assembling, Gradually and evenly tighten ◠The cleaning agent should be compatible with the rubber parts, plastic parts, metal parts and working medium (such as gas) in the ball valve. Working medium for gas, gasoline (GB484-89) can be used to clean metal parts. Non-metallic parts cleaned with pure water or alcohol ◠Disassembled individual parts can be cleaned by dipping. Non-metallic parts that remain undistracted may be cleaned with a clean, fine, silk-dipped cleaning cloth (to prevent the fibers from sticking to the parts). Cleaning must remove all the grease, dirt, glue, dust and other adhesion on the wall ◠Non-metallic parts should be removed from the cleaning agent immediately after cleaning, not for a long time ◠After cleaning, to be washed wall washer volatile (Can be used silk cloth wipers without cleaning agent) assembly, but should not be shelved for a long time, otherwise it will rust, dust pollution ◠new parts also need to be cleaned before assembly ◠use grease lubrication. Grease should be ball 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 on the surface of the seal mounting groove, a thin layer of grease on the rubber seal, and a thin layer of grease on the sealing surface and friction surface of the valve stem. ◠Metal Debris, fibers, grease (except for the provisions of the use) of dust and other impurities, foreign bodies and other pollution, adhesion or stay on the surface of the parts or into the cavity 1) Re-tighten the stem nut. Note: Do not lock too tight, usually locked 1/4 turn ~ 1 circle, the leak will stop. 2), replace the valve seat and seal A), disassemble the valve in the half-open position, rinse, clear the body of dangerous substances may exist inside and outside. Close the ball valve, remove the connecting bolts and nuts on both flanges and remove the valve completely from the pipe. Disassemble the drive unit in sequence - actuator, connecting bracket, lock washer, stem nut, butterfly shrapnel, gland, wear plate, stem packing. Remove the cover connection bolts and nuts, separate the cover from the valve body, and remove the cover gasket. Make sure the ball is in the "off" position, which makes it easier to take it out of the valve body and then remove the valve seat. Push the valve stem down through the hole in the valve body until it is completely removed, then remove the O-ring and stem underfill. CAUTION: Exercise caution to avoid scratching the stem surface and the stuffing box sealing area of ​​the valve body. B), reassembly cleaning and inspection remove the parts, it is strongly recommended to replace the spare parts package seat and gaskets and other gaskets seals. Assemble in the reverse order of disassembly. With the specified torque, cross-lock the flange connection bolts. With the specified torque, lock the stem nut. After installing the actuator, input the corresponding signal to rotate the valve core by rotating the valve stem to open and close the valve. If possible, please pressure-seal the valve and test the performance according to relevant standards before reassembling the pipe. 1, the principle Ball valve opening and closing pieces of a ball, the ball around the centerline for rotation to achieve open, close a valve. 2, places suitable for low pressure, small diameter pipe for cutting off the water flow and changing the distribution of water or need quick opening and closing of the place.
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