... , each fire extinguisher has its own work pressure, the pressure was too high or too low will affect ... the use of.Products Classification1.Imitate diaphragm pressure gauges2.Pressure gauges3.Diaphragm pressure gaugesOur business scope of fire fighting accessoriesOur ... there are fire extinguishers with bolt, sealing, plastic, pressure gauge, all kinds of fire extinguisher valve, nozzle, internal ...