The SPGW‑Type double‑acting piston seal is a high‑performance combined sealing element designed for piston reciprocating motion inside hydraulic cylinders. Capable of sealing pressure from both directions, this SPGW piston seal consists of an elastic energizer and anti‑extrusion sliding sealing surface, delivering reliable bidirectional sealing effect under heavy‑duty cyclic pressure conditions.
Made of premium wear‑resistant sliding material paired with elastic elastomer, the SPGW‑Type double‑acting piston seal features low friction coefficient, great pressure resistance and stable dimensional stability. When hydraulic pressure acts on either side of the piston, the energizer pushes the sliding sealing layer tightly against the cylinder bore inner wall to block medium leakage. It resists gap extrusion damage under high‑pressure surges and maintains consistent performance during frequent back‑and‑forth piston movements. It also works well with most common mineral‑based hydraulic fluids used in engineering machinery.
Matching standard piston groove sizes, the SPGW‑Type double‑acting piston seal enables easy assembly and direct replacement. It is widely used for excavators, construction machinery, mining hydraulic cylinders, lifting devices and industrial hydraulic equipment. Installing SPGW bidirectional piston seals reduces internal cross‑leakage inside cylinders, lowers component wear, decreases downtime for repair and improves the whole‑system service life of your hydraulic machinery.
Original text from: Hydraulic and Pneumatic Seals https://www.bszzseal.com/
