Structural features: a single end, arbitrary rotation direction, in line with the EN12756 ( DIN24960 ) standard, a push ring by driving lug to keep the spring from falling, jammed, static ring can be limiting, spring travel restrictions, to avoid excessive wear of carbon ring.

Applications: widely used in wastewater treatment systems and chemical pump.

Operation parameters: pressure: M7N, M74 unbalanced type < 1.6MPa H7N, H75, H76 and 6MPa balance type

Temperature: - 40 ~ 220: speed up to 20 m / S