Whip-on globe valve
Cut-off valve advantages 1. Simple structure, convenient manufacturing and maintenance. 2. The working stroke is small and the opening and closing time is short. 3, good sealing, small friction between sealing surfaces, long life. Nominal pressure: PN1.0-25.0Mpa, 150Lb-2500Lb Working temperature: -40-600 ° C Nominal diameter: DN15-600mm Connection method: flange, thread, butt welding, socket welding, NPT When greased the union-type globe valve, the problem of grease injection is often ignored. Pressure in the grease injection operation, Note
Advantages of the globe valve 1. Simple structure, convenient manufacturing and maintenance. 2. The working stroke is small and the opening and closing time is short. 3. Good sealing performance, small friction between sealing surfaces and long service life. Nominal pressure: PN1.0-25.0Mpa, 150Lb-2500Lb
Operating temperature: -40-600°C
Nominal diameter: DN15-600mm
Connection method: flange, Thread, butt weld, socket weld, NPT
For-welded cut-off valve When grease is injected, the problem of grease injection is often ignored. The pressure, grease injection amount and switch position are normal during the grease filling operation. However, in order to ensure the grease filling effect of the butt-off valve, it is sometimes necessary to open or close the butt-off valve to check the lubrication effect and confirm that the surface of the ball or gate of the butt-off valve is evenly lubricated. When filling grease, pay attention to the problem of valve body drain and wire plug pressure relief. After the pressure test of the butt-off valve, the gas and water in the valve chamber of the sealed chamber are boosted due to the increase of the ambient temperature. When the grease is injected, the drain and pressure should be drained first, so as to facilitate the smooth operation of the grease injection work. After the grease is applied, the air and moisture in the sealed chamber are sufficiently replaced. Timely discharge of the valve chamber pressure also ensures the safety of the butt weld valve. After the grease is applied, be sure to tighten the drain and pressure relief plug to prevent accidents. When cleaning the weld-type shut-off valve, pay attention to the water in the motor and its transmission mechanism. Especially the rain that infiltrates during the rainy season. One is to rust the transmission mechanism or the transmission bushing, and the other is to freeze in winter. The torque caused by the operation of the electric valve is too large. Damage to the transmission parts may cause the motor to be unloaded or the over-torque protection may not be electrically operated. The drive components are damaged and cannot be performed manually. After the over-torque protection action, the manual operation also fails to switch. For example, forced operation will damage the internal alloy parts. The selection principle is: 1. The shut-off valve should be used on the pipeline or device of high temperature and high pressure medium. Such as thermal power plants, nuclear power plants, high-temperature, high-pressure pipelines of petrochemical systems. 2. On the pipeline where the flow resistance is not strict on the pipeline. That is, the place where the pressure loss is not considered. 3. Small valves can be used with needle valves, instrument valves, sampling valves, pressure gauge valves, etc.