Active Member
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[China]
Address: Industry Park. JS, ZJ, China. 314100
Contact name:Tiffany
VIIPLUS INTERNATIONAL |
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ASTM A240 Type 316 stainless steel, combined with a PTFE (Polytetrafluoroethylene) coating on the bush and washer, offers superior corrosion resistance and low-friction properties. The Type 316 stainless steel, known for its high chromium and nickel content, provides excellent resistance to a wide range of chemicals, acids, and salts. This makes it a popular choice for applications in harsh environments.
The PTFE coating on the bush and washer further enhances the performance of the components. PTFE is a synthetic fluoropolymer that is known for its exceptional slipperiness and non-stick properties. This coating significantly reduces friction and wear, improving the efficiency and longevity of the bush and washer.
The combination of ASTM A240 Type 316 stainless steel and PTFE coating creates a robust and reliable system that is suitable for a wide range of applications, including mechanical components, fluid handling equipment, and chemical processing equipment. The corrosion resistance and low-friction properties of this material combination ensure smooth and efficient operation in demanding environments.
Self-lubricating bearing bushings-technical-inform...
Valve bushing can be optionally supplied in a number of different stainless steel backed bushing and bushing materials
Our extensive stainless steel bushing inventory not only covers standard industry sizes.
A wide variety of 316 stainless seamless steel bushing options are available to you, such as api, bs, and gb.
The metal-polymer bearing suitable for dry running with a low coefficient of friction, low wear rate, good sliding characteristics, These self-lubricating bearings. They can be used with a rotational, oscillatory, and axial sliding motion.
In order to assure long-life span and superior quality, all PTFE bushings for valves.valves are moulded from pure, virgin PTFE material. Virgin PTFE provides for an excellent chemical resistance and can be used with aggressive media. Typical characteristics of fluoropolymer resins include chemical inertness, exceptional dielectric properties, toughness and flexibility, low coefficient of friction, negligible water absorption and non-stick characteristics. All these properties provide increased protection against permeation of the line media. Further, low coefficient of friction reduces valve operation torque.
The self-lubricating bearings and washers that are specially manufactured with a bonding of a filled PTFE coated fabric on various baking metal layers like: carbonsteel, bronze, stainless steel and Carbon steel. The sliding surface is primarily composed of a filled PTFE coated fabric and other elements toguarantee the highest wear resistance. The stainless steel bushing products find their best usage in slow-movingapplications.
As a market leader in ASTM A240 TYPE 316 WITH PTFE COATED BEARING products, Viiplus stocks a wide variety of metals, grades, shapes, and specifications. Wh shopping for commercial or valve bushing, you can be assured to find a wide range of sizes and assortment of grades.
Its material structure is Steel base + Bronze powder + PTFE and filler. It can offer the good properties of self-lubricating, anti-abrasion, low-friction, fully developing the advantages of metal and multi-element polymer. It’s applied to the printing, woven, tobacco and gymnastic machinery, etc.
1. PTFE with Pb 0.01~0.03mm
2. Porous bronze 0.2~0.3mm
3. Stainless steel backing 0.7~2.3mm
SIZE:
Inside and outside bearing diameters
INSIDE Ø:
Tolerance range of the inside Ø after the assembly in the seat (mm)
HOUSING/SEAT Ø:
Housing/seat tolerance (mm)
BEARING THICKNESS:
Thickness tolerance of the finished bearing (mm)
CUT:
Maximum opening of the bearing flaps (mm)
SHAFT Ø:
Correct size of the shaft to be used with the bearing
Low friction coefficient, good anti-wear, good anti-corrosion
Performs well in mid-acid and strong alkaline condition
| Specific load capacity (static) | ≤ 250 [ N/mm² ] |
| Specific load capacity (dynamic) | ≤ 140 N/mm² at low speeds |
| Specific load capacity(rotating oscillating) | ≤60N/m㎡ |
| Friction value | 0.08 to 0.2 µ(dry)0.02 to 0.08µ(hydrodynamic) |
| Temperature | -200 to +280 [ °C ] |
| Max. dry running Pv (Short-term operation) | 3.6N/m㎡﹡m/s |
| Max. dry running Pv (Continuous operation) | 1.8N/m㎡﹡m/s |
| Max. speed (dry running) | 2m/s |
| Max. speed (Hydrodynamic operation) | ＞2m/s |
| SLIDING LAYERS | Special fabric with filled PTFE, colour black-gray, thickness 400 μm, heavy load capacity and self-lubricating under dry operation. | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| SINTERING | Special adhesive between the fabric and the backing steel, thickness 60 μm. | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| SHAFT | The shaft surface finishing, for optimal performance, shall be between 0.40 and 1.60 μm Ra, depending on different application. Hardness 80 – 160 HB5. | |||||||||||||||||||||||||||||||||||||||||||||||||||||
PTFE oilless dry bearing bushing is in carbon steel backing with sintered bronze intermediate layer, then PTFE () composite inner coated.
| Cylindrical Bushes |
| Flanged Bushes |
| Thrust Washers |
| Flanged Washers |
| Product name | Metal polymer bearing | Material | PTFE,low carbon steel,sintered bronze |
| Model No. | ASTM A240 Type 316 With Ptfe Coated Bush | size | Customized |
In ASTM A240, type 316 and 316L is a chromium nickel austenitic steel, Element molybdenum addition can enhances corrosion resistance of stainless steel, which is the main factor that 316/316l is more corrosion resistant than 304/304l. When 316L steel of low carbon content is only a little higher than 316 steel on strength level. So sometimes grade 316l is almost the same as 316 grade. Another difference, 316l can be used for weld treatment as it contains lower carbon.
316/316L steel has outstanding corrosion resistant properties, wh it is atmospheric or oxidizing environment, even for marine atmosphere, it shows excellent corrosion resistance in welded state. Normally 316/316l steel shows no magnetic in annealed condition, cold drawn or cold rolling process may make it with little magnetic, and it can be fixed with further processing.
316/316L plate is used to manufacture products for applications that are exposed to salt water, acids such as sulfuric acid and chloride, petrochemicals and chemicals and high-heat such as engines and motors.Products include tanks, supports and frames, enclosures and housings, engine, motor and machinery components and parts.
| Chemical Composition of 316/316L steel | ||
|---|---|---|
| Element | 316 | 316L |
| Carbon | 0.08 | 0.030 max |
| Chromium | 16.0-18.0 | 16.0-18.0 |
| Nickel | 10.0-14.0 | 10.0-14.0 |
| Molybdenum | 2.00-3.00 | 2.00-3.00 |
| Manganese | 2.00 | 2.00 |
| Silicon | 0.75 | 0.75 |
| Nitrogen | 0.10 | 0.10 |
| Phosphorus | 0.045 | 0.045 |
| Sulfur | 0.030 | 0.030 |
| Mechanical Property of 316/316l | 316 | 316L |
|---|---|---|
| Yield Strength, min. (ksi) | 30 | 25 |
| Tensile Strength, min. (ksi) | 75 | 70 |
| Elongation, min. (%) | 40 | 40 |
| Hardness, max. (Rb) | 95 | 95 |
| Steel Standards of 316/316L | |
|---|---|
| 316 | 316L |
| ASTM A240 | ASTM A240 |
| ASTM A666 | ASTM A666 |
| ASME SA240 | ASME SA240 |
| AMS 5524 | AMS 5507 |
The valve is used to open and close the pipeline, control the flow direction, adjust and control the parameters of the conveying medium (temperature, pressure, and flow) pipeline accessories. According to its function, it can be divided into shutoff valve, check valve, regulating valve, etc. The valve is the control part in the fluid conveying system, which has the functions of cut-off, regulation, flow diversion, countercurrent prevention, pressure stabilization, diversion or overflow relief. Valves for fluid control systems range from the simplest globe valves to those used in the most complex automatic control systems. Valves can be used to control the flow of air, water, steam, corrosive media, mud, oil, liquid metal and radioactive media, and other types of fluid. Valves according to the material is also divided into cast iron valves, cast steel valves, stainless steel valves (201, 304, 316, etc.), chromium-molybdenum steel valves, chromium-molybdenum vanadium steel valves, double-phase steel valves, plastic valves, non-standard customized valves.
The metal polymer bearing suitable for dry running with a low
coefficient of friction, low wear rate, good sliding
characteristics, These self-lubricating bearings . They can be used
with rotational, oscillatory and axial sliding motion.
The metal polymer bearing have high load capacity and are able to
operate at -328to536 degrees F, and resist shock loading and can
handle both radial and axial loads.
The metal polymer bearings are widely used in Automotive, such as
tractors, combines, crop sprayers, earth-movers, graders and other
construction, auto machines, specific uses in power steering
cylinders, steering gear thrust washers. .
FAQ:
Q: Are bearings used in oil and gas production?
A: We understand the key issues in the oil and gas industries, and offer bearing solutions that provide the performance and durability they demand. Our self-lubricating bearing materials resist wear, chemicals, cavitation, flow erosion and fatigue, making them ideal for a wide range of applications in oil and gas operations.
Q: Which type of bearings can be used in radial or axial piston pumps?
A: Radial and axial piston pumps are used primarily in
construction, agriculture, automotive, material handling and
industrial equipment. Both use shaft journal bearings to support
their loads and speeds.
Q: What is your terms of packing?
A: Generally, we pack our goods in neutral cartons. If you have
legally registered patent, we can pack the goods in your branded
boxes after getting your authorization letters.
