3816 WEST SLIGH AVENUE
TAMPA, FL, 3361-3961
PHONE: 813.888.7991
FAX: 813.243.8218 
EMAIL ADDRESS:
AAITAMPA@YAHOO.COM 
MONDAY-FRIDAY: 8:30 A.M. - 5:00 P.M.
HOME ABOUT US SERVICES WARRANTY & RETURNS PARTS SHOP ONLINE SCHEDULE APPOINTMENT  CONTACT
MAIN MENU
home
about us
services
warranty & returns
videos
parts
shop online
schedule appointment
contact auto air

MY ACCOUNT
login now
create account

SHOP ONLINE
View My E-Quote
View My Shopping Cart


Rock Bottom Prices
We offer wholesale prices to the public and can beat any competitor's price.


Like us on Facebook! +1 us on Google!



TAGS
Click on the individual part below to learn how it functions with in your vehicle's A/C System.

compressors, evaporators, condensers, accumulators, orifice tubes, expansion valves, weld-on-barbs, splicer barbs, engine cooling fan, hoses and belts, receiver/dryers

Manufacturer & Supplier of Auto
AUTO AIR AND ELECTRIC OF TAMPA EXPANSION VALVES
Auto Air & Electric of Tampa sells a complete inventory of New & Remanufactured parts. We are a manufacturer and distributor of automobile air conditioning parts and provide automobile air conditioning service and repair. We order supplies directly from the after market manufacturers, if we don't have what you need in stock, we can make it for you.

 

 

The expansion valve's place in the system is at the evaporator inlet. Like any other valve, its job is to control flow; in this case, the amount of refrigerant entering the evaporator. Since system operating conditions vary (sometimes high cooling demand, sometimes low cooling demand) it is necessary to be able to adjust the amount of refrigerant entering the evaporator. For any given operating condition, if we were to to allow too much refrigerant to enter the evaporator, it would get too cold, and the moisture collected on it could freeze. This would not allow the hot interior air to pass through its fins, and the refrigerant flowing inside the evaporator would not be able to absorb the head from the air. This would eventually bring cooling to a halt. If we were to allow too little refrigerant to enter the heat, which would also result in inadequate, or no cooling. This process of varying refrigerant flow based on system cooling demand is referred to as "metering" the refrigerant into the evaporator.

So how does the expansion valve know how much refrigerant to meter into the evaporator, and how does it do it? First the "how it does it," and its quite simple. Expansion valves contain a movable rod which travels up and down inside the valve. As the rod moves up and down, it can open and close the passage inside the valve that serves as the flow path for the refrigerant. The valve does not have to be fully opened or fully closed at any given time. Its position can vary, or modulate, between the fully opened and fully closed positions. Because of this, it can very accurately meter the precise amount of refrigerant needed to meet any given cooling demand.

This internal passage inside the TXV is much smaller than that of the refrigerant flow pipe that delivers the refrigerant to it. Because of this, as the refrigerant flows through this passage, its pressure drops, and it becomes a low pressure liquid. So as you can see, the expansion valve also serves as a "dividing line" between the high and low pressure sections of the system.

Now the "how does it know how much" part. This is based on evaporator temperature. The warmer the evaporator is, the more refrigerant flow needed, and vice-versa. The expansion valve has a temperature sensing device called a sensing bulb. The sensing bulb measures the temperature of the evaporator and sends a signal to the movable rod inside the expansion valve. This signal corresponds to the amount of refrigerant needed, the rod moves to the propper position, and the correct amount of refrigerant enters the evaporator.

An expansion valve could somewhat be likened to the thermostat in an engine cooling system:

- The thermostat controls the flow of coolant from the engine to the radiator based on cooling system temperature.

- The exapnsion valve controls the flow of refrigerant entering the evaporator based on evaporator temperature, or A/C sytem load/cooling demand.

 


Delivery, Service, & Installation in Tampa Area

Nationwide & International Shipping Available

Call our knowledgeable staff today for the highest-quality products and services at the most affordable prices.

How Automotive Technology Lightens The Burden On Drivers' Budgets
How automotive technology lightens the burden on drivers' budgets where gas and fuel costs are concerned. The focus in the auto world today is fuel efficiency and the automakers are trying to get more miles out of each gallon of gasoline.
Sun, 22 Apr 2012 23:29:06 PST
Ford's New Lane Keeping System
Ford's New Lane Keeping System will be made available on 2013 Ford Fusion and Explorer and on Lincoln MKS and MKZ. Lane departure systems can help keep drivers and passengers safer than ever by preventing cars from drifting to other lanes.
Tue, 10 Apr 2012 00:00:01 PST
Truckin' Toward Economic Recovery
Meet Rick Phillips and find out how trucks are truckin' toward economic recovery. Yokohama Tire Corporation and Bill are very interested in keeping those commercial trucks rolling. Find out more about how they are doing that.
Tue, 27 Mar 2012 21:32:15 PST
Discover a Better Ride on Wet Roads
Discover a better ride on wet roads with Firestone Tires and tips from the tire experts at Firestone. Make sure your tires aren't bald or poorly maintained before you drive on slick roads.
Fri, 09 Mar 2012 22:03:29 PST
MyFord Touch Brings Drivers Into The Digital Age
MyFord Touch Brings Drivers Into the Digital Age. MyFord Touch is a communications and entertainment inside the car system that was created by Ford Motor Company along with Microsoft.
Mon, 27 Feb 2012 22:30:26 PST
I Call Backseat! Android Rear Seat Entertainment System
I Call Backseat! Android Rear Seat Entertainment System. Audiovox is looking out for the people in the back with it's new RSE. Surf the web, access Android apps, play DVD, with an internet connection thanks to Audiovox RSE.
Tue, 21 Feb 2012 21:24:35 PST
TomTom Motorcycle GPS Systems
Can help you navigate the highways where ever you decide to travel. Find out about GPS systems like the TomTom Rider, made for motorcyles.
Sat, 18 Feb 2012 14:39:57 PST
Tom Tom GPS Systems
Tom Tom GPS Systems Because...find out how the Tom Tom GPS Systems are way ahead of the rest of the Global Positioning Systems available today.
Sat, 18 Feb 2012 14:23:59 PST
Satellite Radio Keep Entertainment Quality High On The Road
Satellite radio stations like Sirius or XM keep entertainment quality high on the road for all you drivers out there. Sirius and XM subscribers can access programming from their vehicles, homes, offices or mobile devices.
Mon, 12 Dec 2011 00:01:07 PST
Sensitive Noses Sniff Out New Car Scent
Sensitive Noses Sniff Out New Car Scent For You! Did you know that auto companies hire people to "smell" the components of cars from floor mats to fabrics to cupholders. The "Smell Jury" helps eliminate unpleasant odors in cars.

Sun, 31 Jul 2011 22:34:03 PST


Auto Air & Electric of Tampa
3816 W Sligh Avenue
Tampa, FL 33614-3961
Copyright 2012 Auto Air & Electric of Tampa
All Rights Reserved
sitemap | xml | reset web session | admin
Phone: 813.888.7991
Fax: 813.243.8218
aaitampa@yahoo.com