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The SPNS (Step Seal with PTFE and O-Ring Energizer) is a static hydraulic rod seal installed in gland housings to prevent fluid leakage during rod reciprocation. Its design includes: PTFE Slip Ring: Provides ultra-low friction, chemical resistance, and thermal stability. Elastomeric Expansion Ring (O-Ring): Compensates for PTFE’s rigidity by supplying elasticity and initial sealing force. Bronze-F...
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