Polyurethane oil seals are mainly used in hydraulic cylinders, which are easy to install and can scrape off dust adhering to the piston rod. The green polyurethane oil seal has slightly lower hardness, while the blue one has higher hardness and can withstand greater pressure. Polyurethane oil seals have excellent physical and mechanical properties, wear resistance, and oil resistance, making them suitable for the most demanding working conditions. They effectively prevent the entry of external impurities, thereby achieving excellent sealing performance. They are the most commonly used sealing components in medium and high pressure hydraulic cylinders.

Application | Type | Material |
Rod Seals | UN | TPU(PU,Polyurethane) |
UNS | TPU(PU,Polyurethane) | |
UHS | TPU(PU,Polyurethane) | |
IDU | TPU(PU,Polyurethane) | |
U+S | PU+NBR | |
UPH | NBR & FKM | |
Step Seal | NBR+PTFE | |
VES | Rubber+Fabric | |
IDI | PU | |
ISI | PU | |
Piston Seals | SPG | NBR+PTFE |
SPGW | NBR+PTFE | |
SPGO | NBR+PTFE | |
KDAS | NBR+PU+POM | |
ODI | PU | |
OSI | PU | |
ODU | PU | |
Dust Wiper Seals | DH/DHS | PU |
LBH | NBR & FKM | |
J/JA | PU | |
DKB | NBR & FKM +Metal | |
DKBI | PU+Metal | |
DSI | PU | |
Wear Ring | WR | Phenolic Fabric |
Guide Tape | PTFE | |
Guide Tape | Phenolic Fabric | |
Buffer Seal | HBY | PU+Nylon |
Back-up Ring | O-Ring | NBR & FKM |
X-Ring | NBR & FKM | |
PTFE Washer | PTFE |





Proper use of Polyurethane seal,should pay attention to the following points:
1. Improve lubrication quality, control oil pressure, temperature and flow, and strengthen oil filtering.

We specialized in the development and production of sealing systems which were used in the Metallurgical,Electrical,Auto, Engineering machinery, Light industrial machinery and Electrical appliance manufacturing industries. XINKARRY focus on customers' needs,as a dependable partner and reliable supplier to help you resolve supply or technical problems ,and improve the performance of your equipments or your business. When you are facing emergency repairs situation or urgent orders,the highly responsive team of XINKARRY will offer you very short lead time. XINKARRY has a global sales network,and our seals have been sold to more than 100 countries or areas ,Such as America, England, Canada, Australia, Russian Federation ect .
Q. What is your standard packing?
A: All the goods will be packed by carton box and loaded with pallets. Special packing methods can be accepted when needed.
A: Generally it is 1-2 days if the goods are in stock. or it is 5-10 days if the goods are not in stock, it is according to quantity.
A: Yes, we mainly use ASTM D2000 standard to define the quality of the rubber materials, and tolerances as per ISO3302, ISO2768, etc.
A: NBR, EPDM, SILICONE, FPM(FKM), NEOPRENE(CR), NR, IIR, SBR, ACM, AEM, Fluorosilicone(FVMQ), FFKM, Liquid Silicone, Sponge, etc.
A: It depends on which model, we produce more than 2500 tons of rubber materials per month.