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Back-up ring - 20 bar
Pressure breakers from Hoerbiger are designed to reduce pressure fluctuations for subsequent sealing rings. These efficient breakers are constructed with cast iron, PTFE, PEEK, bronze and other robust materials for an extended service life. Pressure breakers are typically required for pressures over 300psi (20bar) differential pressure between suction and discharge.The pressure breaker throttles the gas pressure pulsations instead of sealing. It can restrict the gas into the case (single-acting) or in and out of the case (double-acting). Pressure above 20bar ensures the minimal load on the main packing seals and prevents the entry of dirt into the packing.