We manufacture elastomer seals, protector bags and custom moulded parts for electric submersible pump (ESP) systems, downhole oilfield equipment and the chemical process industry. The range below covers ESP protector bags in the 456, 540 and 562 series, O-rings from NBR and HNBR through FKM, AFLAS and FFKM, profile rings, diaphragms, oil seals, bonded seals and custom moulded rubber parts. Each product has its own page with specifications, applications and ordering options — select a product for details.
ESP & Downhole
540 ESP Bag Protector Seals
ESP bag seals (protector bags) are the positive-seal element inside an ESP motor protector.
456 ESP Protectors
ESP protectors are constructed with AFLAS bag and pipe labyrinth oil-filled chambers.
562 ESP Protectors
Elastomer bags function as protectors: the bag is positioned to separate the well fluid on the outside from the clean motor oil on the …
AFLAS O-Rings
Moulded from AFLAS (FEPM / tetrafluoroethylene-propylene copolymer) with a service temperature range of −20 to 250 °C.
AFLAS Wye-Points (Connectors)
Wye-point connectors are used on all types of ESP (electric submersible pump) equipment.
O-Rings
F02 Fluoroelastomer O-Rings
F02 is our general-purpose fluoroelastomer (FKM) compound for aggressive oilfield and chemical service.
FFKM Perfluoroelastomer O-Rings
Developed specifically for the chemical process industry, our FFKM O-rings deliver outstanding performance across the widest possible r…
High-Temperature FFKM O-Rings
Where a standard perfluoroelastomer reaches its limit, our HT grade keeps sealing.
High Purity FFKM O-Rings
Designed for semiconductor processes: low erosion and ultra-low particle generation in harsh plasma environments, with excellent therma…
HNBR / HSN O-Rings
Hydrogenated nitrile O-rings offer excellent oil resistance and resist hydrogen sulfide and LPG, which is why they are widely used in o…
High-Fluoro FEPM / FKM O-Rings
A high-fluorine compound rated to 250 °C that resists strong acids and oils, and is available in food-contact grades.
FF22 Perfluoroelastomer O-Rings
FF22 is our perfluoroelastomer grade for chemical process duty, giving excellent resistance to chemicals, acids, alkalis, steam and a w…
Fluorosilicone (FSI) O-Rings
Fluorosilicone combines the fuel and oil resistance of a fluoroelastomer with the very wide temperature capability of silicone.
F90 Fluoroelastomer O-Rings
F90 resists high temperature, steam and hot oils, and offers excellent chemical resistance including methyl chloride, toluene and xylen…
RGD / ED O-Rings
Rapid gas decompression (explosive decompression) resistant O-rings for high-pressure gas service.
Encapsulated O-Rings
An FKM or silicone elastomer core completely covered with a seamless FEP or PFA fluoropolymer sheath — superior chemical resistan…
Profile Rings & Anti-Extrusion
HNBR X-Rings
The four-lobe X-ring design prevents spiral failure in reciprocating applications and performs in rotary duty as well.
AFLAS / FEPM Y-Rings
AFLAS Y-rings combine heat resistance with strong alkali, oil and abrasion resistance for demanding dynamic duties.
Backup Rings
Backup rings are used together with O-rings at pressures above 1500 psi or where extrusion gaps are large, preventing extrusion and ext…
Diaphragms
Elastomer Diaphragm Seals
We mould diaphragm seals in many materials and constructions to suit the medium and the duty.
FKM PTFE Diaphragm
An FKM diaphragm bonded to PTFE, developed for vacuum diaphragm pumps.
EPDM PTFE Diaphragm
EPDM bonded to PTFE combines the chemical resistance of PTFE with the elasticity and economy of EPDM.
Fabric Reinforced Diaphragm
A layer of engineered fabric built into the diaphragm gives tremendous design flexibility: a very thin-walled rolling diaphragm can wit…
Ultra-Thin EPDM Fabric Diaphragm
An ultra-thin EPDM rolling diaphragm with fabric reinforcement, produced down to 0.3 mm thickness.
FFKM Perfluoroelastomer Diaphragm
FFKM diaphragms resist strong acids, ethers, esters and other aggressive chemicals with excellent high-temperature chemical resistance,…
Silicone Diaphragm Valve
High-purity silicone diaphragm valves for food, medical and semiconductor applications, with excellent resistance to extreme temperatur…
Oil Seals, Bonded Seals & Cord
FKM / Viton Oil Seal
FKM oil seals with a metal insert: good mechanical strength, UV and wear resistance, performing well at both low and high temperature a…
FFKM Perfluoroelastomer Bonded Seals
Perfluoroelastomer bonded (metal-insert) seals for the most aggressive media: sulphuric, hydrochloric and hydrofluoric acid, acetaldehy…
FKM / Viton Spring Seal
Spring-energised FKM seals improve equipment reliability and extend seal and equipment service life.
Fluorosilicone (FSI) Bonded Seals
Fluorosilicone bonded to metal for aerospace service.
FKM / Viton Cord
FKM O-ring cord, cut to length to make up any diameter on site, with excellent resistance to corrosive fluids at elevated temperature a…
Other Custom Rubber Parts
HNBR / HSN Barrel
HNBR is a hydrogenated nitrile rubber offering greater thermal stability, broader chemical resistance and higher tensile strength than …
Silicone Cover / Handle Cover
Silicone covers for the insulation protection of equipment parts: good insulation performance, high temperature resistance and long ser…
Silicone Bonded Seal
Silicone bonded to metal: good insulation with excellent high- and low-temperature resistance, giving more effective sealing and easier…
Need a Custom Seal?
If you do not see the part you need, we mould to drawing or to sample. Tell us your medium, working temperature, pressure and dimensions and we will recommend the compound and geometry — from O-rings, X-rings and Y-rings to diaphragms, bonded seals and ESP protector bags. Reach our sales team at sales@aobo.biz or +86-573-87855272.