Air Fitting
 |
 AIR LINE FITTINGS PK COUPLINGS ADAPTORS 1 4 BSP  US $27.37
|
 Nylon Braided Air Brush Air Hose with Brass Fittings US $18.00
|
 10pc SOLID BRASS QUICK COUPLER AIR HOSE FITTING SET US $9.99
|
 10 AIR QUICK COUPLER ADAPTOR PLUG CONNECTOR FITTING SET US $15.52
|
 20pc AIR QUICK COUPLER FITTINGS FOR AIR COMPRESSOR TOOL US $22.99
|
 20PC QUICK CONNECT COUPLER SET BRASS AIR TOOL FITTINGS US $11.90
|
 14 CRAFTSMAN PROFESSIONAL AIR COUPLER FITTINGS 3 8 NPT US $2.36
|
 Air Filter Lubricator Regulator 1 2 Fitting US $4.99
|
 7 Pc Automotive Tru Flate Plug Coupler Air Fittings US $23.93
|
 10 AIR QUICK COUPLER FITTINGS 4 AIR COMPRESSOR TOOLS US $14.99
|
 5 Pc Automotive Tru Flate Plug Coupler air Fittings US $23.93
|
 CLIP ON BRASS AIR CHUCK TIRE INFLATOR 1 4 FITTING US $3.99
|
 10 Pc Air Zerk Grease Fittings Grease Gun Kit Lube US $39.99
|
 65 AIR COMPRESSOR HOSE COUPLER FITTINGS Spray Gun Tool US $24.99
|
 Senco Recoil Air Hose w Fittings Hitachi DeWalt Makita US $12.95
|
 5pc Air Brass Fittings universal COUPLER CONNECTOR US $4.49
|
 20 pc Air Quick Coupler Fitting 4 Air Compressor tool US $24.99
|
 AIR FITTING ADAPTER 3 8npt to 1 4npt Brass US $1.95
|
 10 BRASS AIR HOSE REPAIR FITTINGS 1 4 NPT FOR 3 8 HOSE US $9.99
|
 Contractor Automotive Coupler Air Fitting ¼ Male 5pc US $3.00
|
 25mm x 20mtr air hose with claw cupling fittings US $150.76
|
 Brass 8 PC Quick Connect Coupler Air Tool Fittings Set US $3.99
|
 2 AIR TOOL SWIVEL FITTINGS A MUST HAVE FOR AIR TOOLS US $15.99
|
 5 Air Hose Quick Disconnect Fittings 3 8 NEW US $17.50
|
 AIR FITTING ASME SAFETY VALVE 165 PSI 1 8 IN NPT V165 8 US $5.99
|
 10 Pcs Air Line 90 Elbow Male Fittings 1 2 OD 1 2 NPT US $25.00
|
 Contractor Automotive Coupler Air Fitting ¼ Female AC4 US $3.00
|
 Contractor M Style Coupler Air Fitting ¼ Female 5 IP4F US $3.00
|
 ZERK FITTINGS ACCESSORIES TOOL KIT FOR AIR GREASE GUN US $39.99
|
 10PC AIR QUICK COUPLER FITTINGS 4 TOOLS AQC 010 US $14.99
|
 12697 GRIP 30M BLUE PVC AIR HOSE WITH FITTINGS US $36.50
|
 AIR FITTINGS US $2.75
|
 1 2 Chicago quick fitting air hose crowsfoot sandblast US $13.99
|
 Air Hose 17 PC Fittings Accessory Quick Connect Set New US $7.99
|
 10 BRASS AIR CONNECTOR FITTINGS FITS MILTON STYLE 727 US $13.45
|
 Swan Air Hose 300 Psi WP 3 8 25 1 4 Male Fitting US $14.99
|
 TRUCKER TOUGH AIR HOSE BLOW GUN BRASS FITTINGS NEW US $12.99
|
 Brass Barb Fitting 1 2 x 3 4 air hose fuel comp water US $5.25
|
 3 8X50´ PCV AIR HOSE NEW 300PSI 1 4 FITTINGS US $15.99
|
 Acme Air Line Fitting 1 2 Male Pipe Threads A942N US $3.79
|
 Air MAX 300 PSI 50 ULTRA FLEX HOSE W Fittings US $74.99
|
 Northern Industrial Replacement Air Filter 1 4 Fitting US $14.99
|
 Acme Air Line Fitting 1 2 Female Pipe Threads A943N US $3.79
|
 Northern Industrial Replacement Air Filter 3 8 Fitting US $15.99
|
 Northern Air Filter Lubricator Regulator 1 2 Fitting US $49.99
|
 Air Filter Lubricator and Regulator 1 4 Fitting US $49.99
|
 Rapid Air Tee Fitting 1 2in Model 50200 US $4.99
|
 Northern Industrial Air Fittings Kit 16 Pc Set NEW US $29.99
|
 Pneumatic Air Tool Fittings 3 8 MNPT Great Price US $2.99
|
 Contractor Automotive Coupler Air Fitting ¼ Male AC4M US $3.00
|
Air Fitting
Direct-Fired Gas Industrial Makeup Air Units
NISCO Co. ia an engineering representative and developer of various types of gas-fired air makeup units for industrial building ventilation.
Gas-Fired Pressurization Units move large quantities of air at low temperature differentials (usually 50° or less), which is a strategy to minimize temperature stratification in the large spaces they are employed to heat. The equipment is typically mounted on the roof of the facility or at grade on elevated supports to ensure that the supply air is delivered high. The high air delivery allows for a longer “throw” of the air, thereby requiring less equipment to cover the required floor area. The most common fuel is natural gas, however, units can be converted to burn propane. There are two primary categories of gas-fired AHUs: indirect-fired and direct-fired.
Indirect-fired units burn the fuel and air mixture inside of a heat exchanger while the air traveling to the space passes over the outside of the heat exchanger. In this design, the products of combustion travel through a vent to the outside of the building.
Direct-fired units utilize air that will be sent to the heated space for combustion without use of a heat exchanger. The products of combustion are mixed directly with large volumes of outdoor air. Such mixing is considered safe because of the high dilution ratio.
In addition, thorough burning of the natural gas takes place so that no harmful products of combustion enter the airstream. One product of combustion is water vapor, which can be problematic with very tight building construction due to the potential for condensation in colder climates. For tight buildings, it is best to consider the use of indirect-fired equipment. There are several common configurations of direct-fired units.
The 80/20 design can vary the quantity of outside air from 100% down to 20%. The burner has a high turndown ratio and only outside air should be drawn across the burner. The discharge air volume is fixed and the quantity of outside air can be adjusted to maintain building pressurization. The makeup air unit configuration is ideal for supplying large quantities of replacement air for facility exhaust systems. Such systems can include paint spray booths and other industrial exhaust applications. These units supply a fixed amount of 100% outside air. Air Recirculation units recirculate a fixed 80% of the air while bringing in 20% outside air that passes over the burner. They supply a minimum amount of ventilation to spaces that do not require large quantities of outside air to maintain building pressurization.
Variable Air Volume VAV units have a varying supply air volume and work similar to the 80/20 design, however, the recirculated air passes through a bypass section instead of through the facility. This type of unit is used in applications where building pressurization is desired and where contaminants located in the space cannot be recirculated.
Facilities that have indoor vehicle operation frequently accumulate carbon monoxide and associated noxious fumes. For such instances, a ventilation sequence can be instituted to limit this potentially harmful buildup. The pressurization units for these buildings could be fitted with a carbon monoxide detector with an initial setpoint of, for example, 50 ppm that would trigger an alarm and energize a time-delay relay.
If the condition still exists after, say, five minutes, then the return air damper would modulate closed and the outside air damper would modulate to the 100% open position. A second setpoint of 100 ppm would initiate an alarm and eventually de-energize the burner. The dampers would then be positioned to enable the exhaust mode. After the carbon monoxide returns to a safe level, the sensor could reset the unit to normal operation.
In addition to emergency ventilation to purge carbon monoxide, the pressurization unit can be used to provide a source of ventilation during warm and hot months of the year. A reverse acting thermostat would modulate the outside air and return air dampers to bring in more outside air to maintain the indoor setpoint. These units can also be fitted with either chilled water or DX cooling coils to provide tempered or conditioned air to the space during the summer.
Direct-fired pressurization units are approximately 93% efficient, with much of the available energy in the burned natural gas being delivered to the space in the form of heat. The supply airstream absorbs the heat that would be normally lost through a flue or vent pipe as in the indirect-fired configuration.
A feature of this type of equipment that is especially important in cold climates is its ability to keep the building slightly pressurized to typically at 0.01 in. wc. This reduces the infiltration of cold air, and when overhead doors are opened, the outside air dampers are modulated open to admit more air to maintain this level of pressurization. This feature also acts as virtual ductwork to distribute air where it needs to go: toward cracks or areas with open doors.
Direct-fired pressurization equipment is capable of delivering plenty of ventilation to a facility when it is configured as the 80/20 system described previously. Infrared systems, however, may need to be supplemented with a separate ventilation system. With certain classes of facilities, the infrared system would not require additional equipment for ventilation, since large structures with many doors would provide enough natural ventilation through leakage.
Gas-fired pressurization systems each offer good solutions to heating large structures such as warehouses, distribution centers, aircraft hangers, and manufacturing facilities. Situations that require significant ventilation favor pressurization air handlers as do facilities that generate dust, mists, and other contaminants. Cleaner environments with less intensive ventilation needs would do well to go with the infrared radiant heating approach. In very cold climates, it might be beneficial to go with a hybrid solution using radiant heat at the perimeter as the primary heating source and placing pressurization units at the center of the facility for ventilation and for pressurization when doors are open.
Additional information can be found at the NISCO web site http://nisco.net/airhandler.html.
Oleg Tchechel
Industrial Air Make-Up Systems Designer
NISCO Co.
http://nisco.net/hvac.html
http://nisco.net/news.html
About the Author
Oleg Tchechel
Developer of Industrial Ventilation Equipment
NISCO Fan Co.
http://www.nisco.net/custserv.html
http://www.nisco.net/inquiry.html
Where to get air con fitted and how much will it cost?
I've bought a 2002 ford fiesta finesse, was wondering how to go about getting air conditioning fitted and how much will cost?
trade car for one with AC.. not worth 2000 to 3000 to do it
