Trap, Strainer, Expansion Joint

Trap 

There are two (2) the type of trap that is: Steam trap and Water Trap (Drain)

Steam Trap: Steam trap function to remove condensation from piping equipment with steam or steam heating system with steam without allowing took apart. There are several types of steam trap include: 

Float Steam Trap: Consists of a room that contains the mechanism and the float arm (arm), which set the position of the valve. If the trap level condensation increased, then the valve open and emit condensate. This type of valve tends to exclude the flow of fluid with constant (Steady) during the valve position proportional to the speed condensation the entrance. Due to discharge valve is located under the liquid level, the vent system is required to remove the gas that is not condensed. 

Thermostatic Steam Trap: Containing an element of a thermostatic valve to open and close as a response to temperature fluida. Condensation Upstream collected in the valve, the cooling and ice thermostat and causing the valve opens and condensation out. When condensation a cold condense issued and signed in with the temperature approaching the saturated temperature, the thermostat and close the valve. Based on the principles of operation, thermostatic steam trap release condense the intermeten depending on the load condense happens. 

Bucket Steam Trap Inverted: Consist of the room that contains a bucket upside down (below the openings), which set the valve opening through a mechanism specific affiliation. Valve is opened when a bucket sitting in the bottom of trap. This will let air out during the heating up in the bottom of the bucket-seal by condense a ride. Valve will remain open during condensation flow and the air trapped yag exit through a small hole at the top of the bucket. At the time of entry into the steam trap, steam fills the bucket pail so that float up and close the valve. Steam slowly and exit holes in the top of the bucket and the bucket condense then submerged and open the valve so that the back flow out condensate trap. 

Termodynamic Steam Trap: In this type, condensed bursts of heat tends to urge piston in the small openings at the outlet temperature approached condensed from 30 oF saturated temperature. Condensed immediately collected in the drain system freeze with temperatures just under the spout (flash temperature). Open the trap and remove water accumulated until the temperature of condensed once again approaching the saturated temperature and spatter, so close the trap over and over and continue the cycle repeated. 

Water (Drain) Trap: Drain trap used to remove fluid that condensate in gas service. Drain trap operating principle is the same as the float steam trap unless the trap has no drain thermostatic element. 

Strainer 

Strainer is used in the piping system to protect sensitive equipment against dirt and other particles that brought by fluida. At system start-up or Flushing, strainer installed in the position Upstream pump to protect it from dirt left in the pipe during construction. Strainer also usually permanently installed in the Upstream control valve, trap, instruments and equipment for protection against rust products that arise in the system and brought piping. 

Some type of strainer is available in the market, among others: 
1. Wye (Y)-strainer 
2. Tee (T)-strainer 
3. Cone strainer 
4. Basket strainer 

Wye-strainer is usually used on piping with the size of a small diameter (small Bore, 1-1/2 "down) as in the trap, control valve and instrument. 

Basket strainer is generally used when the required flow capacity is high. 

Tea-strainer is usually used on piping with the size of large diameter (big Bore, 2 "and above) as the pump, Compressor, etc.. 

Cone strainer is usually used for temporary purposes only in activities such as piping cleaning (Flushing) and at the time of start-up. 

Expansion Joint 

Expansion joint used in the system to absorb piping expansion due to temperature expansion loop used if not practical and does not want. Expansion joint types are available in slip, ball, metal bellows, rubber xpansion joint. 

Slip joint expansion: Having sleeve (sleeve) into the body. Leakage is controlled by the packing is located between the sleeve and body. Leakage is relatively small and near zero in some usage. Slip-fit expansion joint is used in piping with a large axial movement. Slip-joint expansion can not keep lateral movement and retire to a corner lap because it can cause leakage due to packing can experience distortion. So the guide is required on the installation of slip-joint expansion. 

Ball Joint Expansion: It consists of a ball and socket with the sealing mechanism is placed between them. Seal comes from the material that is rigid and in some designs, selant software can be injection into the cavity between the ball and socket. Ball Joint Expansion able to absorb axial rotation, and retire to a corner, however, can not accommodate movement along the longitudinal axis. But that's offset must be installed to keep out the axial movement. 

Expansion Joint Bellows: Bellows expansion joint is able to absorb and contraction with the tools name is flexible bellows that pressed or drawn.

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