Installation and commissioning of throttle valve

Installation and commissioning of throttle valve

1.Before the throttle valve is installed, the throttle valve shall be disassembled, cleaned, assembled, and checked for damage to the sealing surface according to the requirements of the drawing. If there is any damage, the sealing surface shall be repaired and ground, and the hand wheel shall be rotated to avoid jamming. If the user requires that the throttle valve not be disassembled and installed on site, it shall be assembled without disassembly when leaving the factory. If it is not disassembled and installed on site, the valve shall be installed directly. If it is not disassembled and installed, the valve shall be installed and put into operation within six months after leaving the factory.

2.Before the throttle valve is installed, the pipeline shall be cleaned to prevent the sundries in the pipeline from damaging the sealing surface and causing valve leakage.

3.Generally, the valve can be installed vertically or horizontally.

4.The valve shall be installed on the pipeline according to the medium flow arrow shown on the valve body.

5.During assembly, the set screw must be aligned with the valve body groove and tightened to prevent the bonnet from loosening.

6.The upper and lower layers of valve packing are corrugated packing, and the middle is flexible graphite packing. Before putting into operation, tighten the nuts of the union bolts at the packing gland to avoid serious leakage caused by the packing being washed out during operation. If bubbles or slight leakage are found at the stuffing box during operation, the nuts of the union bolts at the packing gland must be tightened again in time until there is no leakage.

7.When the valve is disassembled during shutdown for maintenance, the sealing surface of the valve must be checked, reground, replace the filler and gasket, and reassemble for commissioning.

8.When the valve is connected with the pipeline, it shall be carried out in strict accordance with the "Power Construction Regulations" or the welding specifications and welding procedures provided by the manufacturer.