Mitsui Seiki Spare Part: Ball Bearing

A ball bearing is an engineering term referring to a type of rolling-element bearing which uses balls to maintain the separation between the moving parts of the bearing.

The purpose of a ball bearing is to reduce rotational friction and support radial and axial loads. It achieves this by using at least two races to contain the balls and transmit the loads through the balls. Usually one of the races is held fixed. As one of the bearing races rotates it causes the balls to rotate as well. Because the balls are rolling they have a much lower coefficient of friction than if two flat surfaces were rotating on each other.

Ball bearings tend to have lower load capacity for their size than other kinds of rolling-element bearings due to the smaller contact area between the balls and races. However, they can tolerate some misalignment of the inner and outer races.

Compared to other bearing types, the ball bearing is the least expensive, primarily because of the low cost of producing the balls used in the bearing.

Although Leonardo da Vinci has been credited with the discovery of the principle behind the mechanics of ball bearings, the first patent was awarded to Sven Wingquist from Sweden in 1907. Ball bearings were found on the Roman Nemi ships constructed in about 40 A.D.

Source: www.tiarasakti.co.id

Mitsui Seiki Spare Part: Roller Bearing

A rolling-element bearing is a bearing which carries a load by placing round elements between the two pieces. The relative motion of the pieces causes the round elements to roll (tumble) with little sliding.

One of the earliest and best-known rolling-element bearings are sets of logs laid on the ground with a large stone block on top. As the stone is pulled, the logs roll along the ground with little sliding friction. As each log comes out the back, it is moved to the front where the block then rolls on to it. You can imitate such a bearing by placing several pens or pencils on a table and placing your hand on top of them. See "bearings" for more on the historical development of bearings.

A rolling-element rotary bearing uses a shaft in a much larger hole, and cylinders called "rollers" tightly fill the space between the shaft and hole. As the shaft turns, each roller acts as the logs in the above example. However, since the bearing is round, the rollers never fall out from under the load.

Rolling-element bearings have the advantage of a good tradeoff between cost, size, weight, carrying capacity, durability, accuracy, friction, and so on. Other bearing designs are often better on one specific attribute, but worse in most other attributes, although fluid bearings can sometimes simultaneously outperform on carrying capacity, durability, accuracy, friction, rotation rate and sometimes cost. Only plain bearings have as wide use as rolling-element bearings.

Source: www.tiarasakti.co.id

Mitsui Seiki Spare Part: Power Plug

AC power plugs and sockets are devices that connect appliances, portable light fixtures, and other electrically-operated devices to the commercial power supply so that electric power can flow to them.

Power plugs are male electrical connectors that fit into female electrical sockets. They have contacts that are pins or blades that connect mechanically and electrically to holes or slots in the socket. Plugs usually have a live or hot contact, a neutral contact, and an optional earth or Ground contact. Many plugs make no distinction between the live and neutral contacts, and in some cases they have two live contacts. The contacts may be steel or brass, and may be zinc, tin or nickel plated.

Power sockets, power receptacles, or power outlets are female electrical connectors that have slots or holes which accept the pins or blades of power plugs inserted into them and deliver electricity to the plugs. Sockets are usually designed to reject any plug which is not built to the same electrical standard. Some sockets have a pin that connects to a hole on the plug, for a ground contact.

Source: www.tiarasakti.co.id

Mitsui Seiki Spare Part: Washer

A washer is a thin plate (typically disk-shaped) with a hole (typically in the middle) that is normally used to distribute the load of a threaded fastener. Other uses are as a spacer, spring (belleville washer, wave washer), wear pad, preload indicating device, and locking device. Rubber washers are also used in taps (valves) where they form the seal that shuts off the flow of liquid or gas. Rubber or silicone washers may also be used to reduce vibration when fastening fans to computer cases. Usually washers have OD (outer diameter) about twice their ID (inner diameter).

Washers are usually metal or plastic. High quality capscrews require hardened steel washers to prevent the loss of pre-load due to Brinelling after the torque is applied. Rubber or fiber gaskets used in taps to stop the flow of water are sometimes referred to colloquially as washers; while they may look similar, however, washers and gaskets are usually designed for different functions and made differently.

Washers are also important for preventing galvanic corrosion, particularly by insulating steel screws from aluminum surfaces.

Source: www.tiarasakti.co.id

MItsui Seiki Spare Part: Mechanical Seal

A mechanical seal is a device which helps join systems or mechanisms together by preventing leakage (e.g., in a plumbing system), containing pressure, or excluding contamination.

Seal types;

* Induction sealing or cap sealing
* Adhesive, sealant
* Bodok seal, a specialized gas sealing washer for medical applications.
* Bridgman seal, a piston sealing mechanism that creates a high pressure reservoir from a lower pressure source.
* Bung
* Coating
* Compression seal
* Diaphragm seal
* Ferrofluidic seal
* Flange Gasket
* Gasket
* Glass-ceramic-to-metal seals
* Hose coupling, various types of hose couplings
* Hermetic seal
* Hydrostatic seal
* Hydrodynamic seal
* Labyrinth seal A seal which creates a tortuous path for the liquid to flow through
* Lid (container)
* Rotating face mechanical seal
* Face seal
* O-ring
* O-ring boss seal
* Piston ring
* Plug
* Radial shaft seal
* Trap (plumbing) (siphon trap)
* Stuffing box, Gland (engineering) (mechanical packing)
* Wiper seal
* Dry gas seal
* Exitex seal

Source: www.tiarasakti.co.id

Mitsui Seiki Spare Part: Solenoid Valve

A solenoid valve is an electromechanical valve for use with liquid or gas controlled by running or stopping an electrical current through a solenoid, which is a coil of wire, thus changing the state of the valve. The operation of a solenoid valve is similar to that of a light switch, but typically controls the flow of air or water, whereas a light switch typically controls the flow of electricity. Solenoid valves may have two or more ports: in the case of a two-port valve the flow is switched on or off; in the case of a three-port valve, the outflow is switched between the two outlet ports. Multiple solenoid valves can be placed together on a manifold.

Solenoid valves are the most frequently used control elements in fluidics. Their tasks are to shut off, release, dose, distribute or mix fluids. They are found in many application areas. Solenoids offer fast and safe switching, high reliability, long service life, good medium compatibility of the materials used, low control power and compact design.

Besides the plunger-type actuator which is used most frequently, pivoted-armature actuators and rocker actuators are also used.

A common use for 2 way solenoid valves is in central heating. The solenoid valves are controlled by an electrical signal from the thermostat to regulate the flow of heated water to the heating elements within the occupied space. Such valves are particularly useful when multiple heating zones are fed by a single heat source. Commercially available solenoid valves for this purpose are often referred to as Zone valves.

Another common use for solenoid valves is in automatic irrigation sprinkler systems. See also controller (irrigation).

In the paintball industry solenoid valves are usually referred to simply as "solenoids." They are commonly used to control a larger valve used to control the propellant (usually compressed air or CO₂). In the industry, "solenoid" may also refer to an electromechanical solenoid commonly used to actuate a sear.

Solenoid valves are also used for air control, to control fluid flow, and in pharmacology experiments, especially for patch-clamp, which can control the application of agonist or antagonist.

Source: www.tiarasakti.co.id

Mitsui Seiki Spare Part: Pressure Control Valve

A valve is a device that regulates the flow of materials (gases, fluidized solids, slurries, or liquids) by opening, closing, or partially obstructing various passageways. Valves are technically pipe fittings, but usually are discussed separately.

Valves are used in a variety of applications including industrial, military, commercial, residential, and transportation.

Oil and gas, power generation, mining, water reticulation, sewerage and chemical manufacturing would constitute the majority of valves used by industry.

Plumbing valves are the most obvious in everyday life, taps for hot and cold water, gas control valves on cookers and barbecues, small valves fitted to washing machines and dishwashers, and safety devices fitted to hot water systems are all simple valves.

Most valves are operated manually, either by a hand wheel or lever. Some valves are 'self-operating' driven by changes in pressure, temperature or flow. These changes in pressure or temperature often act against springs or capsules filled with expanding substances. Examples of this type of valve found commonly are safety valves fitted to hot water systems or steam boilers.

More complex control systems using valves requiring automatic control based on an external input (i.e., regulating flow through a pipe to a changing set point) require an actuator. An actuator will stroke the valve depending on its input and set-up, allowing the valve to be positioned accurately, and allowing fine control over a variety of requirements.
Valves are also found in the Otto cycle (internal combustion) engines driven by a camshaft, lifters and or push rods where they play a major role in engine cycle control.

Source: www.tiarasakti.co.id

Mitsui Seiki spare Part: Regulator

Regulator (automatic control)

In automatic control, a regulator is a device which has the function of maintaining a designated characteristic. It performs the activity of managing or maintaining a range of values in a machine. The measurable property of a device is managed closely by specified conditions or an advance set value; or it can be a variable according to a predetermined arrangement scheme. It can be used generally to connote any set of various controls or devices for regulating or controlling items or objects.

Examples are a voltage regulator (which can be a transformer whose voltage ratio of transformation can be adjusted, or an electronic circuit that produces a defined voltage), a gas regulator, such as a diving regulator, which maintains its output at a fixed pressure lower than its input, and a fuel regulator (which controls the supply of fuel).

Regulators can be designed to control anything from gasses or fluids, to light or electricity. Speed can be regulated by; electronic, mechanical, or electro-mechanical means. Such instances include;

* Electronic regulators as used in model railway sets where the voltage is raised or lowered to control the speed of the engine
* Mechanical systems such as valves as used in fluid control systems. Purely mechanical pre-automotive systems included such designs as the Watt centrifugal governor whereas modern systems may have electronic fluid speed sensing components directing solenoids to set the valve to the desired rate.
* Complex electro-mechanical speed control systems used to maintain speeds in modern cars (cruise control) - often including hydraulic components,
* An aircraft engine's constant speed unit changes the propellor pitch to maintain engine speed.

Source: www.tiarasakti.co.id

Mitsui Seiki Spare Part: Valve Seat

The valve seat in an internal combustion gasoline or diesel engine is the surface against which an intake or an exhaust valve rests during the portion of the engine operating cycle when that valve is closed. The valve seat is a critical component of an engine in that if it is improperly positioned, oriented, or formed during manufacture, valve leakage will occur which will adversely affect the engine compression ratio and therefore the engine efficiency, performance (horsepower), exhaust emissions, and engine life.

Valve seats are often formed by first press-fitting an approximately cylindrical piece of a hardened metal alloy, such as Stellite, into a cast depression in a cylinder head above each eventual valve stem position, and then machining several conical-section valve seat surfaces to form the valve seat into a shape that will match the mating surface of the corresponding valve. These several conical-section surfaces are each designed to mate with or to clear the valve that will be subsequently inserted into the valve guide hole that is below or above the valve seat in the cylinder head.

There are several ways in which a valve seat may be improperly positioned or machined. These include incomplete seating during the press fitting-step, distortion of the nominally circular valve seat surfaces such they deviate unacceptably from perfect roundness or waviness, tilt of the machined surfaces relative to the valve guide hole axis, deviation of the valve seat surfaces from concentricity with the valve guide holes, and deviation of the machined conical section of the valve seat from the cone angle that is required to match the valve surface. Automated quality control of inserted and machined valve seats has traditionally been very difficult to achieve until the advent of digital holography which has enabled high-definition metrology for measuring all of these listed deviations.

Source: www.tiarasakti.co.id

Mitsui Seiki Spare Part: Exhaust

An exhaust system is usually tubing used to guide waste exhaust gases away from a controlled combustion inside an engine or stove. The entire system conveys burnt gases from the engine and includes one or more exhaust pipes. Depending on the overall system design, the exhaust gas may flow through one or more of:

* Cylinder head and exhaust manifold
* A turbocharger to increase engine power.
* A catalytic converter to reduce air pollution.
* A muffler (North America) / silencer (Europe), to reduce noise.

Source: www.tiarasakti.co.id

Mitsui Seiki Spare Part: Shim

In engineering, a shim is a thin and often tapered or wedged piece of material, used to fill small gaps or spaces between objects. Shims are typically used in order to support, adjust for better fit, or provide a level surface. Shims may also be used as spacers to fill gaps between parts subject to wear. The term comes from a Kentish word of unknown origin, dating to at least as early as 1723, meaning "a slip of wood." Originally a piece of iron fitted to a plow for scraping soil; meaning "thin slip to fill up a space or raise a level" is from 1860. The verb meaning "to wedge up a surface by means of a shim" is attested from 1937.

Source: www.tiarasakti.co.id

Mitsui Seiki Spare Part: Safety Valve

A safety valve is a valve mechanism for the automatic release of a gas from a boiler, pressure vessel, or other system when the pressure or temperature exceeds preset limits. It is part of a bigger set named Pressure Safety Valves (PSV) or Pressure Relief Valves (PRV). The other parts of the set are named relief valves, safety relief valves, pilot-operated safety relief valves, low pressure safety valves, vacuum pressure safety valves.

Safety valves were first used on steam boilers during the industrial revolution. Early boilers without them were prone to accidental explosion.

Source: www.tiarasakti.co.id

Mitsui Seiki Spare Part: Bearing

A bearing is a device to permit constrained relative motion between two parts, typically rotation or linear movement. Bearings may be classified broadly according to the motions they allow and according to their principle of operation as well as by the directions of applied loads they can handle.

Source: www.tiarasakti.co.id

MItsui Seiki Spare Part: Gasket

A gasket is a mechanical seal that fills the space between two objects, generally to prevent leakage between the two objects while under compression. Gaskets save money by allowing less precise mating surfaces on machine parts which can use a gasket to fill irregularities. Gaskets are commonly produced by cutting from sheet materials, such as gasket paper, rubber, silicone, metal, cork, felt, neoprene, nitrile rubber, fiberglass, or a plastic polymer (such as polychlorotrifluoroethylene). Gaskets for specific applications may contain asbestos. It is usually desirable that the gasket be made from a material that is to some degree compressible such that it tightly fills the space it is designed for, including any slight irregularities. Many gaskets require an application of sealant directly to the gasket surface to function properly.

Source: www.tiarasakti.co.id

Mitsui Seiki Spare Part: O-Ring

An o-ring is a loop of elastomer with a round (o-shaped) cross-section used as a mechanical seal or gasket. They are designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal at the interface.

The joint may be static, or (in some designs) have relative motion between the parts and the o-ring; rotating pump shafts and hydraulic cylinders, for example. Joints with motion usually require lubrication of the o-ring to reduce wear. This is typically accomplished with the fluid being sealed.

O-rings are one of the most common seals used in machine design because they are inexpensive and easy to make, reliable, and have simple mounting requirements. They can seal tens of megapascals (thousands of psi) pressure.

Source: www.tiarasakti.co.id

Mitsui Seiki Spare Part: Oil Filter

An oil filter is a device used to decontaminate oil that contains suspended impurities. A major application is in forming part of the lubrication system of engines in which filters are typically detachable unit due to the need for regular service or replacement. The filtration of oil in engines is essential for enhancing longevity and performances.

Source: www.tiarasakti.co.id

Mitsui Seiki Spare Part: Air Filter

An air filter is a device which removes solid particulates such as dust, pollen, mold, and bacteria from air.

Air filters are used in applications where air quality is important, notably in building ventilation systems and in engines, such as internal combustion engines, gas compressors, diving air compressors, gas turbines and others.

Source: www.tiarasakti.co.id

Spare Part Compressor

We are PT. Tiara Sakti the distributor of Mitsui Seiki Air Compressor provide quality repairs and maintenance service including spare parts with competitive price and also good in delivery time.

We offer oil filter, air filter, oil separator, maintenance kit, O-ring, Shim, Seal and many kind of spare part for compressor.

Source: www.tiarasakti.co.id