PTFE Ring Gasket for Powder Metal Shock Absorber Pistons

Specifically developed for powder metal shock absorber piston assemblies, this filled PTFE ring disc delivers the precise hardness (Shore D 60) and dimensional control required for reliable sealing against sintered metal piston surfaces. Every single part undergoes 100% gauge inspection, providing the zero-defect quality assurance demanded by high-volume automotive production lines.

1. Good quality: We have strict quality control system. Good reputation in the market

2. Quality Control: Approved by GB/T 19001-2008/ ISO9001:2008

3. Fast and cheap delivery: We have big discount from forwarder(Long Contract)

4. Can produce according to customers' drawings

Powder metal (sintered) pistons present a unique sealing challenge: their surface has microscopic porosity and asperities that act as abrasive cutting features against overly soft seal materials. Shore D 60 provides sufficient hardness to resist abrasive wear from these surface features while retaining enough compliance to achieve effective sealing. Extensive durability testing with sintered piston counterparts has validated this hardness range as optimal for balancing wear resistance with sealing performance.

Unlike sampling-based inspection where only a statistical subset of parts is measured, our 100% GO/NO-GO gauge inspection verifies every single ring disc against its dimensional specifications. Each part passes through precision GO (minimum material condition) and NO-GO (maximum material condition) gauges. Parts that fail either gauge are automatically rejected. This zero-defect approach is critical for automotive production where a single out-of-spec seal can cause an assembly line stoppage or field failure.

We can manufacture to GB3452.1-82 (Chinese standard), AS568A (American standard for O-ring and seal sizes), and JIS B2401 (Japanese industrial standard). Custom dimensions outside these standards are equally welcome. Our ISO9001:2008 and IATF 16949:2016 certified quality systems ensure consistent compliance to whatever standard you specify.

While automotive damper pistons are a primary application, our PTFE ring discs serve diverse industries: food machinery (non-toxic, FDA-compliant), medical equipment (sterilizable, chemically inert), oil and gas (pH 0-14 chemical resistance, high-temperature capable), textile machinery (low friction, oil-free operation), mining equipment (abrasion-resistant, dust-tolerant), and fitness equipment (quiet operation, maintenance-free). Each industry benefits from PTFE's unique combination of properties.

Yes. We offer rings in black (carbon-filled), white (virgin PTFE), and clear/natural colors as standard. Custom colors can be achieved through pigment additives for part identification, assembly orientation marking, or customer branding requirements. Note that pigments may slightly affect mechanical properties — we validate all colored formulations before production release.

We support various supply chain models: blanket order with scheduled releases, safety stock programs with agreed minimum/maximum levels, Kanban pull systems, and vendor-managed inventory (VMI). For qualified production components, we maintain buffer stock of both raw PTFE compounds and finished goods to absorb demand variability. Our Ningbo and Shanghai port access ensures efficient global logistics regardless of destination.