Ventajas y funcionamiento de las válvulas de bola fija estándar ASME
Advantages of stationary ball valves:
1. Sellado de emergencia con inyección de grasa.: In the event of unexpected seat seal failure due to foreign objects in the medium or fire, the grease injection valve provides a quick connection to the grease injection gun. The imported pump allows for convenient and rapid injection of grease into the seat seal, mitigar las fugas.
2. Reliable stem sealing and low operating torque: Además del anillo de sellado estándar, the stationary ball valve also features an O-ring on the packing gland, ensuring reliable stem sealing with double sealing. La empaquetadura de grafito agregada y la inyección de grasa minimizan las fugas en el vástago después de un incendio.. El cojinete deslizante del vástago y el cojinete de empuje facilitan el funcionamiento de la válvula.
3. Full bore or reduced bore: Stationary ball valves can be selected with either a full bore or reduced bore structure as needed. For full bore pipeline ball valves, the flow orifice diameter matches the pipeline inner diameter, facilitar la limpieza de tuberías.
4. Extendable stem: The valve stem can be lengthened according to installation or operational requirements. Extended stem fixed ball valves are particularly suitable for applications requiring underground pipeline installation, como gasoductos urbanos. The extended stem size is determined according to customer requirements.
5. Operación flexible: Utilizando asientos de válvula y cojinetes de vástago con un bajo coeficiente de fricción y excelente autolubricación, El par de funcionamiento de la válvula se reduce significativamente.. Por lo tanto, incluso sin el suministro de grasa selladora, the valve can be operated flexibly and smoothly for extended periods.
Operation and Use of Fixed Ball Valves
1. Before operation, ensure that the pipeline and fixed ball valve have been flushed.
2. Valve operation is completed by rotating the valve stem according to the input signal of the actuator: a 1/4 turn (90°) forward rotation closes the valve. A 1/4 turn (90°) reverse rotation opens the valve.
3. When the actuator’s direction indicator arrow is parallel to the pipeline, the valve is open; when the indicator arrow is perpendicular to the pipeline, the valve is closed.
