The LDH‑type wiper seal is a specialized dust‑removing sealing component applied to reciprocating piston rods of hydraulic cylinders. Made of high‑quality polyurethane with enhanced toughness, this wiper seal delivers outstanding wear resistance, cold resistance and anti‑aging performance, perfectly suited for severe working sites exposed to dust, silt, sand and rainwater.
Designed with an optimized sharp scraping lip, the LDH‑type wiper seal thoroughly scrapes away mud, dust and granular debris sticking to the piston rod surface when the rod retracts back into the cylinder. It blocks outside pollutants from entering the cylinder chamber, protecting inner rod seals and guide rings from abrasive wear and premature damage. Its well‑balanced contact pressure avoids over‑tight friction, preventing scratches on the rod surface during frequent back‑and‑forth movements.
Fitting standard wiper seal grooves, the LDH‑type wiper seal allows quick installation and direct spare‑part replacement. It is commonly paired with rod seals for excavators, construction machinery, lifting devices, agricultural machines and general‑purpose industrial hydraulic cylinders. Adopting LDH‑type wiper seals effectively decreases unexpected seal failures, prolongs the service cycle of the whole sealing system, cuts down equipment maintenance expenses and guarantees reliable operation of hydraulic machinery under harsh outdoor conditions.
Original text from: Hydraulic and Pneumatic Seals https://www.bszzseal.com/
