hydraulic seals manufacturer

Hydraulic Seals Manufacturer and Supplier for Cylinder Sealing Systems

Quick Answer: CORASEALS is a hydraulic seals manufacturer and supplier for rod seals, piston seals, wiper seals, buffer seals, wear rings, guide rings, U-cup seals, V-packing, compact seals and hydraulic cylinder seal kits. We support hydraulic cylinder repair, OEM replacement and new build projects. Send the rod diameter, bore diameter, groove dimensions, pressure, speed, hydraulic fluid and seal profile to get a quotation.

Hydraulic sealing systems keep pressure on the working side and keep contamination out of the cylinder. A single hydraulic cylinder uses more than one seal type. The rod seal holds pressure. The wiper seal cleans the rod. The piston seal controls flow between the piston and bore. Wear rings and guide rings carry radial load and prevent metal contact. CORASEALS supplies these seals as individual parts or as a complete hydraulic cylinder seal kit.

International buyers searching for a hydraulic seals manufacturer in China can use CORASEALS as one contact for profiles, materials, dimensional checks and export documentation. Dimensions can be quoted in metric or inch units.

Hydraulic Seals Manufacturer Supply Range

The product range is structured around hydraulic cylinder sealing systems and pneumatic sealing systems. CORASEALS supplies the following profiles.

Rod seals and piston seals
Wiper seals and scraper seals
Buffer seals and compact seals
Wear rings and guide rings
U-cup seals and V-packing
O-rings and backup rings for static glands
Hydraulic cylinder seal kits
Pneumatic seals for air cylinders and valves

Profile Codes Need a Dimension Check

Type codes such as TC, UN, UHS, HBY and KDAS are not universal drawings. Different manufacturers use different groove widths and lip geometries for the same code. CORASEALS checks the drawing, cross section and gland before quoting a replacement. This check prevents a seal from fitting the groove but failing in pressure or speed.

Hydraulic Seal Profiles and Selection Points

Seal profile	Function	Main selection data
Rod seal	Seals pressure on the rod side	Rod diameter, pressure, speed, fluid
Piston seal	Seals between piston and bore	Bore diameter, groove width, pressure direction
Wiper seal or scraper	Removes contamination from the rod	Rod OD, contamination type, external conditions
Buffer seal	Absorbs pressure spikes before the rod seal	Pressure peaks, cushioning, rod diameter
Wear ring or guide ring	Guides the piston or rod	Radial load, clearance, stroke length
U-cup seal	Works as a rod or piston seal	Gland dimensions, pressure direction
V-packing	Adjustable sealing for rods or pistons	Packing space, compression, gland depth

Materials for Hydraulic Seals

The correct material depends on the hydraulic fluid, operating temperature, pressure cycle and speed. Do not select a material by color or hardness alone. The table below shows common material selection points.

Material	Common use	Main limitation to check
NBR	Mineral oil hydraulic systems	Temperature and chemical resistance limits
FKM	Higher temperature oil and fuel contact	Cost and low temperature performance
EPDM	Water-based fluids and phosphate ester	Not suitable for most mineral oil
Polyurethane or TPU	High wear rod and piston seals	Water and high temperature limits
PTFE or filled PTFE	Low friction and wide chemical compatibility	Requires correct gland and loading design

NBR and polyurethane are common for standard mineral oil cylinders. FKM is selected for higher temperature or more aggressive fluids. EPDM is wrong for most mineral oil applications. Always confirm the fluid type before changing the seal material.

Data Needed for a Hydraulic Seal Quotation

Provide the following data when you request a hydraulic seal quotation.

Rod diameter and bore diameter
Groove dimensions or full cylinder drawing
Operating pressure and pressure spikes
Stroke speed and cycle rate
Hydraulic fluid type and working temperature
Seal profile, type code, sample photo or old seal drawing
Required quantity

Send us the rod diameter, bore diameter, groove dimensions, pressure, speed, hydraulic fluid and seal profile. Include the required quantity and any existing drawing or sample photo. If the application has rough contamination or high side loads, include that note in the inquiry.

Hydraulic Seal Applications

CORASEALS supplies hydraulic seals for mobile equipment, industrial cylinders, presses, lifting platforms, agricultural machinery, construction machinery, mining equipment and general hydraulic power units. The same profile may work in different machines, but the dimension and material must match the cylinder.

We also support hydraulic cylinder seal kits for repair shops and OEM assembly. Provide the cylinder model or the full groove list when the model does not identify the internal seals accurately.

Frequently Asked Questions

Q1: Is CORASEALS a hydraulic seals manufacturer or a trading company?

CORASEALS is a hydraulic seals manufacturer and supplier. We match each profile and material with the correct production line and supply the parts through one export channel.

Q2: What is the difference between a rod seal and a wiper seal?

A rod seal holds hydraulic pressure on the rod side. A wiper seal removes dirt, dust, moisture or metal particles from the rod surface before the rod enters the cylinder.

Q3: Which material is best for hydraulic oil?

NBR and polyurethane are common for mineral hydraulic oil. Confirm the temperature, pressure and speed. FKM may be needed for higher temperature or fuel and chemical contact. EPDM is not suitable for most mineral oil.

Q4: Do you supply hydraulic cylinder seal kits?

Yes. We supply hydraulic cylinder seal kits. Send the cylinder make, model, bore diameter, rod diameter, stage quantity, groove dimensions, old seal photos and any existing seal drawing.

Q5: Can CORASEALS make custom hydraulic seals?

Yes. Custom hydraulic seals require the rod diameter, bore diameter, groove dimensions, material, fluid, pressure, speed and quantity. We can supply machined or molded profiles based on the application.

Request a Hydraulic Seal Quotation

Contact CORASEALS for a hydraulic seal quotation. Send the rod diameter, bore diameter, groove dimensions, pressure, speed, hydraulic fluid and seal profile. Include the required quantity, sample photo and any existing drawing or type code.

Use the contact form at CORASEALS or send the details to our sales team for a dimension and material review.