Shaanxi Kelong New Materials Technology Co., Ltd.
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1,Product Description
Manufacturer's High Temperature Resistance U-packing UN/UHS/UNS Hydraulic Oil Seals PU Piston Seal
High-quality raw materials
We use brand new raw materials to ensure that our products are full, elastic, environmentally friendly, non-toxic, and compliant with standards.
Accurate dimensions
Easy to install, good sealing performance, and quality guaranteed.
Complete range of sizes
Adequate stock with a variety of specifications to meet different usage needs.
2,Material analysis
NBR
Temperature range: -30°C to 125°C Hardness: 40-90A Color: Customizable Application: Excellent oil resistance Advantages: Excellent
oil resistance and stability, widely used, affordable price
FKM
Temperature range: 20°C to 250°C Hardness: 50-90A Color: Black/brown/green, other colors can be customized Application: Excellent
oil and chemical resistance Advantages: Wear resistance, acid and alkali resistance, high temperature resistance.
SILICONE
Temperature range: 60°C to 225°C Hardness: 25-90A Color: Red/transparent (clear)/white, etc. Application: Food grade Advantages:
Good heat resistance, cold resistance, lubricating oil resistance, and water resistance.
EPDM
Temperature range: 50°C to 150°C Hardness: 40-90A Color: Customizable Advantages: Excellent ozone resistance, heat resistance,
steam resistance, cold resistance, and LLC resistance.
NR
Temperature range: -44°C to 120°C Hardness: 60-90A Color: Customizable Advantages: Excellent mechanical strength and fatigue resistance.
HNBR
Temperature range: -30°C to 160°C Hardness: 50-90A Color: Black, other colors can be customized Advantages: Excellent ozone
resistance, heat resistance, mechanical strength, and electrical resistance compared to butadiene rubber.
| Material Types and General Properties | |||||
| <Table 1>Material types and general properties | |||||
| Item Type | Temp.R ange("C) | Property | |||
| High Temp.R | Low Temp.R | ||||
| ACM | 150 | -10 | It is used in diaphragm,hose for automotive application.Good resistance to heat,ozone and oil.Generally attacked by water,alcohol,glycol and aromatic hydrocarbons.The molecular structure contains ethyl acrylate(EA),butyl acrylate (BA),and ethyl acrylate(MEA).High BA content get better low temperature resistance,and high MEA content get more oil resistance. | ||
| NR | 70 | -40 | Excellent compression set,high tensile strength,resilience,abrasion,tear resistance,good friction characteristics,excellent bonding capabilities to metal substrate,and good vibration dampening characteristics | ||
| VMQ | 225 | 55 | The most widely temperature ranges for application.Good weather and ozone resistance,but poor mechanical property and chemical resistance. | ||
| PTFE | 250 | -150 | Due to the low friction coefficient,it is used in oil seal lip.However,it is poor elastic property | ||
| TPU | 100 | -40 | Polyurethane is one of the groups of elastic thermoplastic materials.PU has been used in seal technology for many years because of their physica characteristics.It is an organic material of high molecular weight whose chemical composition is characterized by a large number of urethane groups.In addition it is characterized by extremely good mechanical properties such as high tensile strength,abrasive resistance,tear strength,and extrusion strength.However t is not resistant to polar solvents,chlorinated hydrocarbons,aromatics,brake fluids,acids,and alkalis | ||
| FKM | Excellent chemical resistance except ester and ketone | ||||
| 200 | -25 | Dipolymer | Copolymer of vinylidiene fluoride and hexafluoro propylene,and fluorine content is 66%. | ||
| -20 | Tripolymer | Copolymer of vinylidiene fluonide,hexafluoro propylene and tetrafluro ethylene.Fluorine content is 68%.Tripolymer has better fluid resistance than dipolymer | |||
| XNBR | 100 | -40 | Modification of traditional NBR with the insertion of carboxyl groups It has better tensile strength,modulus,abrasion than NBR | ||
3,Application scenarios
Light and medium load hydraulic reciprocated sealing system. Widely used at industries such as mobile machinery, light machine, agricultural machinery, injection moulding machinery, forklifts, cranes, automobiles, forestry machinery and mining machinery, etc. Favorable mechanical characteristics even under tough working conditions.
4,product features
- high wear resistance, low pressure deformation and excellent anti-extrusion performance - tear resistance especially in bending and tensile - easy installation
