DH DHS PU Hydraulic Cylinder Wiper Seals for Forklifts
Function: DH/DHS hydraulic cylinder wiper seals remove dust, dirt, mud, and other contaminants from the piston rod, helping prevent external particles from entering the hydraulic system.
Applications: Commonly used in forklifts, injection molding machines, excavators, construction machinery, and industrial hydraulic cylinders.
Models: Available in DH and DHS profiles, with various sizes and specifications to suit different hydraulic cylinder designs.
Material: Mainly manufactured from polyurethane (PU), offering good wear resistance, mechanical strength, and durability in reciprocating applications. Custom material options are available upon request.
JINNAI SEAL DH polyurethane hydraulic cylinder wiper seals are designed to remove dust, dirt, mud, and other external contaminants from the piston rod during reciprocating movement. Installed in the rod-side groove of a hydraulic cylinder, these wiper seals help prevent contaminants from entering the cylinder and protect internal sealing components from premature wear.
Manufactured from high-quality polyurethane (PU), DH wiper seals offer good abrasion resistance, mechanical strength, and dimensional stability. They are suitable for hydraulic cylinders used in construction machinery, forklifts, injection molding machines, agricultural equipment, and industrial hydraulic systems.
We supply DH PU wiper seals in various sizes and specifications, with custom manufacturing available according to customer drawings, samples, and application requirements.
Key Features and Benefits
Effective Dust Removal: Scrapes dust, dirt, mud, and other contaminants from the piston rod surface.
Wear Resistance: Polyurethane material provides good resistance to abrasion during reciprocating operation.
Reliable Contamination Protection: Helps prevent external particles from entering the hydraulic cylinder.
Durable Construction: Offers good mechanical strength for demanding industrial applications.
Accurate Fit: Designed for installation in compatible hydraulic cylinder grooves.
Custom Options: Available in different dimensions and specifications to meet specific equipment requirements.
Material and Technical Parameters
DH hydraulic wiper seals are primarily manufactured from polyurethane (PU), a material commonly selected for its abrasion resistance and mechanical properties.
Parameter
Specification
Product Type
DH Wiper Seal
Seal Function
Piston Rod Dust Protection
Material
PU (Polyurethane)
Material Brand
Bayer, Germany (as specified)
Operating Temperature
-35°C to +100°C
Hardness
90–93 Shore A
Pressure Rating
≤31.5 MPa*
Reciprocating Speed
≤1 m/s
Movement Type
Reciprocating
Customization
Available
DH Wiper Seal Types
DH polyurethane wiper seals are designed for hydraulic cylinder rod applications. Different dimensions are available to accommodate various cylinder designs and installation grooves.
Available specifications can be selected according to:
Rod Diameter
Housing Bore Diameter
Seal Height and Width
Groove Width and Depth
Installation Requirements
Custom hydraulic wiper seals can also be manufactured according to technical drawings, samples, or specified dimensions.
Groove Design and Installation
Correct groove dimensions and installation conditions are essential for the performance of a hydraulic cylinder wiper seal.
The DH wiper seal groove design should be selected according to the seal profile, rod diameter, housing dimensions, and installation requirements.
Key design considerations include:
Groove width and depth
Housing and piston rod tolerances
Edge chamfering for easier installation
Smooth contact surfaces
Proper seal orientation
Refer to the DH wiper seal structure and groove machining drawings for dimensional guidance. Actual machining dimensions should be confirmed against the selected seal specification and application requirements.
Applications
DH PU hydraulic cylinder wiper seals are widely used in equipment where piston rods operate under exposure to dust, dirt, and external contaminants.
Typical applications include:
Forklifts: Hydraulic lifting cylinders and mast systems.
Excavators: Boom, arm, and bucket hydraulic cylinders.
Construction Machinery: Hydraulic cylinders in loaders, bulldozers, and other heavy equipment.
Injection Molding Machines: Hydraulic clamping and movement systems.
Agricultural Machinery: Hydraulic cylinders used in tractors and agricultural equipment.
Industrial Hydraulic Systems: Hydraulic actuators and cylinder assemblies.
Custom Hydraulic Wiper Seal Manufacturing
JINNAI SEAL provides OEM and custom manufacturing services for polyurethane hydraulic wiper seals and other industrial rubber sealing components.
Our customization options include:
Custom Seal Dimensions and Profiles
PU and Other Suitable Material Options
Drawing-Based and Sample-Based Production
Custom Tooling and Mold Development
Bulk Production for OEM Applications
Whether you need standard DH wiper seals or customized hydraulic cylinder dust seals, we can support your requirements based on technical drawings, samples, and operating conditions.
Why Choose Jinnai Seal?
Price Advantage:Direct‑from‑factory pricing without middle‑man markup.Tiered volume pricing to help you cut overall procurement costs.
After‑Sales Warranty:Defective products can be returned or exchanged free of charge within 14‑30 days upon receipt.We provide professional technical support for sealing solution consultation.
Quality Assurance:Internationally certified products with outstanding durability.
Strict production control to meet standard dimensional tolerances.
Compliant with RoHS, IATF16949 and other relevant industrial standards.
Rich Industry Experience:15‑year professional rubber sealing processing experience.
Support standard stock items & custom O‑rings per your drawings or samples.
Serving global industrial clients from hydraulic, automotive, machinery and other sectors.
One-stop industry seals
Looking for reliable DH polyurethane hydraulic cylinder wiper seals?
Contact JINNAI SEAL for product specifications, custom sizes, technical support, and OEM manufacturing services. Send us your drawings, samples, or dimensional requirements to discuss a suitable sealing solution.
FAQs
What is the function of a hydraulic cylinder wiper seal?
A hydraulic cylinder wiper seal removes dust, dirt, and other contaminants from the piston rod as it moves in and out of the cylinder. It helps protect internal sealing components and reduce contamination-related wear.
What material is used for DH wiper seals?
DH wiper seals are commonly manufactured from polyurethane (PU), which offers good abrasion resistance, mechanical strength, and durability in reciprocating applications.
Where are DH PU wiper seals used?
They are commonly used in hydraulic cylinders for forklifts, excavators, construction machinery, injection molding machines, agricultural equipment, and industrial hydraulic systems.
How do I select the correct DH wiper seal size?
Selection should be based on the piston rod diameter, housing bore, seal dimensions, and groove design. Providing a technical drawing or sample can help confirm the correct specification.
Can DH hydraulic wiper seals be customized?
Yes. Custom sizes and specifications can be manufactured according to customer drawings, samples, or specific equipment requirements.
What is the difference between a wiper seal and a rod seal?
A wiper seal removes external contaminants from the piston rod, while a rod seal prevents hydraulic fluid from leaking out of the cylinder. Both components work together in a hydraulic cylinder sealing system.
