Hydraulic Seals

Hydraulic seals are constructed from polyurethane, rubber, or PTFE.Hydraulic seals are widely used in hydraulic cylinders of excavators, bulldozers, cranes, and many other types of heavy equipment.

Dynamic seal and static seal of hydraulic seals Classification. The portfolio covers piston seals, rod seals, seals buffer, and wiper seals along with guide rings and O rings.

Hydraulic seals

Subcategories

Rod Seals

Rod seals are essential components in hydraulic cylinders. They prevent fluid from leaking along the piston rod and help maintain system pressure. Made from materials such as Nitrile Rubber (NBR), Hydrogenated Nitrile (HNBR), and Polyurethane (PU), these seals offer strong resistance to wear, pressure, and hydraulic fluids. Rod seals are commonly used in construction equipment, mobile machinery, and various industrial systems. They help reduce friction and protect internal components from damage. With proper selection and installation, rod seals can improve system reliability and extend service life.

Piston Seals

Piston seals play a key role in hydraulic and pneumatic cylinders. They seal the piston as it moves inside the cylinder bore, blocking fluid from passing between chambers. This helps maintain pressure and control system performance. Piston seals are often made from materials like NBR, HNBR, and PTFE, offering good resistance to wear, heat, and pressure. These seals are widely used in construction machines, industrial hydraulics, and manufacturing equipment. With proper design and fit, piston seals improve reliability and reduce leakage.

Rod And Piston Seals

Rod and piston seals are used together in hydraulic cylinders to control fluid flow and seal both the rod and piston areas. These seals help maintain pressure in double-acting cylinders and reduce internal and external leakage. Rod and piston seals are typically made from NBR, PU, HNBR, or PTFE, offering excellent wear and pressure resistance. They are widely applied in construction machinery, mobile hydraulics, and industrial equipment. Choosing the right rod and piston seals ensures stable performance and reduces system failures.

Guide Elements

Guide elements are used to guide and support the piston and rod inside hydraulic cylinders. They maintain alignment and reduce side forces during movement. This protects seals and prevents metal-to-metal contact. Guide elements are made from PTFE, thermoplastics, or composite materials for low friction and high strength. They are widely used in hydraulic presses, mobile equipment, and industrial automation. Reliable guide elements improve system stability and extend component life.

Rotary Seals

Rotary seals are designed to seal components with rotational movement, such as shafts in motors and pumps. They prevent leakage of fluids and block entry of dust or debris. Rotary seals are typically made from materials like NBR, FKM, and PTFE for excellent wear and temperature resistance. These seals are used in hydraulic motors, gearboxes, machine tools, and other rotary equipment. Quality rotary seals improve sealing efficiency, reduce downtime, and extend system life.

Wipers Seals

Wiper seals are installed at the cylinder head to remove contaminants from the piston rod during retraction. They help prevent dirt, water, and debris from entering the system. This reduces seal wear and protects internal components. Wiper seals are made from materials like polyurethane (PU), NBR, or PTFE, offering excellent durability and flexibility. They are widely used in construction equipment, mobile hydraulics, and industrial machinery. High-quality wiper seals improve system reliability and reduce maintenance needs.

Back Up Rings

Back up rings are used alongside O-rings and other soft seals to prevent extrusion in high-pressure sealing environments. Placed in the groove behind the primary seal, they provide additional support and help maintain sealing integrity under pressure. Commonly made from PTFE or other rigid materials, back up rings improve performance in demanding hydraulic and pneumatic systems. They are widely used in valves, cylinders, pumps, and heavy-duty equipment where pressure spikes or large gaps are present.

O Rings

O rings are versatile seals used in a wide range of hydraulic and pneumatic systems. They fit into grooves and compress during assembly to form a tight seal. Made from materials like NBR, FKM, EPDM, and silicone, O rings provide excellent resistance to pressure, temperature, and chemicals. These seals are commonly used in valves, pumps, cylinders, connectors, and flanges across industries such as automotive, machinery, and fluid control. Proper material selection ensures long-term sealing performance and leak prevention.

Wear Rings

Wear rings are non-metallic guide elements used in hydraulic and pneumatic cylinders. They keep the piston or rod aligned, reducing side loads on seals. Made from materials like phenolic resin, polyester, or PTFE composites, wear rings resist abrasion, high pressure, and temperature. They are used in construction machinery, presses, injection molding machines, and other heavy-duty systems. By preventing metal-to-metal contact, they extend the life of both seals and cylinder components.

Out-of-Stock
PTFE Rotary Piston Seal
The S002 series PTFE Rotary Piston Seal is a low-friction design, consisting of a PTFE-filled seal and an O-Ring energizer. It is designed for rotary swivel applications, where low friction, low torque and high wear resistance are needed.


Item NO.:                             S002


Payment:                               T/T


Product Origin:                   China


Shipping Port:              Shenzhen


Order(MOQ):                         50

Out-of-Stock
Symmetrical U-Cup
The U001 Series Symmetrical Piston U-cup is a popular System Seals design used in standard duty applications. Its symmetrical design creates equal seal force across both seal lips. This gives the seal the capability to function as both a piston seal and rod seal or alternatively to seal dynamically on both the outside and inside diameters. This feature is often appreciated when reduced product inventories are desired. Manufactured in a variety of materials and sizes from 6 mm to 1600 mm in standard or custom diameters.


Item NO.:                             U001


Payment:                               T/T


Product Origin:                   China


Shipping Port:              Shenzhen


Order(MOQ):                         50

Out-of-Stock
Single-Acting Piston Seal
The P002 Series Single-Acting Piston Seal is a low-friction design, consisting of a PTFE filled seal and an O-ring energizer. It is designed for single-acting cylinders in challenging applications, where low friction and high wear resistance are needed.



Item NO.:                             P002


Payment:                               T/T


Product Origin:                   China


Shipping Port:              Shenzhen


Order(MOQ):                         50

Out-of-Stock
Double acting rod seal
Product Overview
The Double Acting Rod Seal, also known as a dual action rod seal, is engineered to deliver bidirectional sealing performance in hydraulic and pneumatic cylinders. It ensures tight sealing during both the extension and retraction strokes, making it an ideal solution for double acting cylinder applications that demand consistent pressure control and zero leakage.    
Whether used in high-pressure hydraulic systems or fast-moving pneumatic equipment, this double-lip rod seal provides reliable and durable sealing under dynamic conditions. 

Out-of-Stock
PTFE Bronze Wear Ring
The PTFE bronze wear ring is precision-machined to guide a rod or piston to avoid metal-on-metal contact in dry and lubricated applications. A gap is intentionally added to the wear ring to allow fluid flow to and from the seal gland and prevent pressure trap or hydrolock between the seal and wear ring. In the case where the cut ends of the ring touch due to the high thermal expansion of PTFE, an optional radius groove is added on both ends to continue to allow fluid flow.
Out-of-Stock
Heavy-Duty, Double-Acting Wiper PT1
The W002 Series Heavy-Duty, Double-Acting wiper is one of the most popular mill-duty wipers in the steel industry. It includes a reinforced PTFE-filled scraper ring and two energizing O-rings. The design incorporates a wiping lip to prevent contamination from entering the cylinder and an inner sealing lip to remove any oil film from the rod as it cycles. The O-rings individually energize the two wiper lips. In most applications, a pressure relief port between the wiper and the rod seal is recommended.


Item NO.:                            W002


Payment:                               T/T


Product Origin:                   China


Shipping Port:              Shenzhen


Order(MOQ):                         50

Out-of-Stock
Accumulator Piston Seal
The P003 Accumulator Piston Seal is a low-friction design, consisting of a PTFE-filled seal and O-ring energizer. It is designed for double-acting cylinders in challenging applications, where low friction and high wear resistance are needed.


Item NO.:                             P003


Payment:                               T/T


Product Origin:                   China


Shipping Port:              Shenzhen


Order(MOQ):                         50

Out-of-Stock
Heavy-Duty Rod Seal
This heavy-duty hydraulic rod seal is engineered for high-performance sealing in large-diameter, high-pressure environments. Featuring a PTFE-filled sealing element and a profiled energizer, it ensures reliable performance in systems with wide extrusion gaps, short strokes, and oscillating motion (dithering).
Its ultra-low friction and anti-extrusion properties make it ideal for critical hydraulic applications such as rolling mills, injection molding machines, and hydraulic presses.
View all hydraulic rod seals
Out-of-Stock
PTFE Bronze Guide Strip
The PTFE bronze guide strip is to guide a rod or piston to avoid metal on metal contact in dry or lubricated applications. A gap should intentionally be calculated in the cut length to allow fluid flow to and from the seal gland and prevent pressure trap or hydrolock between the seal and wear ring.
Out-of-Stock
Snap-In Single Lip Wiper
The W004 Series Snap-In Single Lip Wiper is manufactured from high-quality polyurethane, which ensures aggressive wiping performance and maximum abrasion resistance. The wiper is designed to exclude and protect the hydraulic cylinder in the harshest conditions


Item NO.:                            W004


Payment:                               T/T


Product Origin:                   China


Shipping Port:              Shenzhen


Order(MOQ):                         50

Out-of-Stock
ID Dynamic Seal
The S003 series seal is a robust profile, designed to work in both rotary and reciprocating applications. For high-pressure use, the S003 series can be combined with a back-up ring.


Item NO.:                             S003


Payment:                               T/T


Product Origin:                   China


Shipping Port:              Shenzhen


Order(MOQ):                         50