FJ41 PN16~PN160 throttling globe vent valves are widely used as closed-circuit devices in pipelines for petroleum,natural gas,coal gas,liquefied petroleum gas,refining,airports,chemical,oil and gas storage and transportation,etc
Product features of throttling cut-off vent valve
1.This valve is a new type of throttling,shut-off,and venting product,which adopts cage shaped labyrinth throttling and has multi-stage throttling effect.It has obvious throttling effect,reliable sealing,and convenient operation and maintenance
2.The valve adopts dual sealing(hard and soft sealing)to ensure reliable sealing.The hard alloy cover can be more resistant to air flow erosion and wear,and the dual sealing can achieve zero leakage under high-pressure gas medium conditions.Valve has a long service life
3.The sealing surface of the valve seat adopts a tapered seal,which is beneficial for the valve to clean the dirt attached to the sealing surface by itself
4.The valve disc of the valve is equipped with a balance hole and a piston type seal,ensuring stable operation under full pressure difference conditions for opening/closing.It is easy and flexible to open and has low opening and closing torque
5.The throttling and shut-off vent valve and the double acting throttling valve have both throttling and shut-off(zero leakage sealing)functions.The throttling part is separated from the sealing surface to reduce the erosion of the seal by the airflow
6.Double acting throttling globe valve also has multi-stage throttling function,with large throttling pressure difference,which can be applied to throttling and shut-off under high pressure
7.The packing adopts a V-shaped packing structure with self sealing ability,which does not require adjustment and is extremely lightweight to open and close.There is an auxiliary sealing grease injection structure at the packing box,which ensures reliable sealing performance of the valve packing
8.This valve can be repaired online,and the pipeline can replace a series of vulnerable parts such as packing under pressure
9.This valve is equipped with a large drain hole at the bottom of the valve,which should be opened if necessary to clean the dirt inside the valve

Performance parameters of throttling cut-off vent valve

Main external dimensions of throttle cut-off vent valve