There are a number of ways for HVAC specialists to control water flow within a closed water system, and a control valve hookup is one of the most effective ways of ensuring that pressure and flow rates are appropriate within the system. Together with automatic and manual balancing valves, control valves help keep water conditions (like pressure and temperature) at the levels specified for that system for optimum performance.
The Control Assembly
Though “control valve” is the most common term, people who talk about this type of valve are actually often referring to an entire control valve assembly. Control valve suppliers may offer these parts separately or as part of an entire system.
- The valve body
- Internal trim parts
- An actuator (which powers the valve in order for it to be able to open)
- The positioner
- Supply pressure regulators
- Air sets
- Other accessories and parts
The Control Loop
A control valve must operate on a closed system loop in order to effectively maintain water pressure and flow within the system. In a closed loop, all components of the system (including the control valve assembly, sensors, pumps, transmission devices, and the vessel under pressure that is being controlled) are interconnected to allow for continuous feedback of information about the status of the water in the system. This status – known as the process variable – must be carefully monitored in order to be sure that the water within the system reaches the correct temperature (called the set point).
Correct hookup of the control loop allows information to be constantly read by the system’s sensors, and this allows for the system to make automatic adjustments to water pressure, flow, and other variables in order to achieve the right temperature.
During the economic downturn, medical practices and hospitals are seeing lower-than-ever collections rates. There are a number of changes – both small and large – that your practice can make to improve the percentage of patients who pay and the time frame within which they turn in payments.
- Collect complete patient information up front. Taking down the patient’s full name and address, phone numbers, work address, date of birth, and emergency contacts gives up front gives you the opportunity to skip-trace and keep tabs on all of your patients. Ask for their social security number as well, though many may choose not to provide it.
- Verify insurance information with the insurance provider. Check on the accuracy and extent of the patient’s coverage as soon as possible, even if you’re busy.
- Be clear about your payment schedule and policies. Printing this clearly on the first page of the forms lets patients know what you expect up front and how failing to pay will affect them. If you use a third-part medical collections agency, let your patients know this – many may be more likely to pay on time.
- Consider a third-party revenue cycle management solution. This gives you a way to turn your collections over to a medical revenue cycle management company that specializes in collections and has the resources to dedicate to your account. Rather than having your busy office staff work on collections in their spare time, a third-party service can utilize their training to maximize your collections by working on them the entire day.
Numbness or tingling sensations in the body are usually felt in the arms, hands, fingers, feet, or hands. Though they are most commonly a symptom of nerve damage, a number of other problems can cause these sensations.
Putting pressure on a nerve for an extended period of time can cause odd tingling sensations and numbness in the affected extremity – this is common when a person sits or lays in an awkward position and an arm or leg “falls asleep.” However, when tingling and numbness occur without an obvious reason, it might be due to some other cause. Seeing a chiropractor for examination and diagnosis may benefit patients with these symptoms.
Certain medical conditions and substance abuse problems can cause the myelin sheaths surrounding the nerves to degenerate, exposing the sensitive nerve cells and interfering with their ability to transmit electrical signals. Alcohol and tobacco use or lead poisoning can cause this type of damage.
Direct physical damage to the nerve – especially in the spinal column – can cause tingling and numbness in parts of the body that that nerve connects to. A neck injury could cause symptoms in the arms, and a back injury might cause symptoms to be felt in the legs.
Herniated (or “slipped”) discs result when the tough outer shell of the cushioning intervertebral discs breaks open, exposing the soft and sensitive material inside. A herniated disc can out undue pressure on the nerves of the spinal column, causing chronic pain and numbness or tingling in the extremities affected by that nerve.
If you are experienced numbness or tingling with no explained cause, treatment from a NJ chiropractor could help pinpoint the exact cause of your symptoms. By first identifying the underlying condition, your chiropractor will be able to treat your real problem and eliminate the discomfort of constant, unexplained numbness.
With solar energy San Diego water heating systems, there are a number of available types and designs available for residences and businesses. The right system for your project depends on the condition of the water in your area as well as your region (mostly due to the climate).
The basis of a solar water heating system is the solar collector – a device similar in appearance to a solar panel that is designed to collect the sun’s energy in water flowing through tubes in the device. This transfer of energy heats the water, and the system may work in a number of different ways.
- Direct. A direct system heats the water in the tubes directly. It’s cost-efficient, but water could overheat or freeze.
- Indirect. An intermediary fluid (known as a heat-transfer fluid) collects the sun’s energy and transfers it to a tank system, where the water is heated. These systems are slightly more expensive.
In addition to direct and indirect heating, either type can also be passive or active.
- Passive. These systems use convection energy driven by heat to move the water. They’re less expensive, but don’t offer any insurance against overheating or freezing.
- Active. Active systems use pumps to move the water through the building. They’re efficient, but more expensive.
Your San Diego solar energy provider can help you decide which is the best system for your home or business.
Carotid artery disease is a condition that occurs when a waxy substance called plaque begins to build up in the carotid arteries – the two large arteries located on either side of the neck that supply blood to the brain. These arteries are fairly large, but when plaque deposits on the arterial walls begin to make them narrower, it’s considerably easier for blood flow to the brain to be blocked.
Causes of Carotid Artery Disease
Just like the arteries in the chest surrounding the heart, the coronary arteries are susceptible to hard, waxy plaque deposits building up on the inside walls. When the inside of the arterial walls become hard and narrowed with plaque buildup, the condition is known as atherosclerosis. Plaque consists mostly of cholesterol, a fatty substance produced by the body and consumed in food. Your risk of developing atherosclerosis (and, in turn, carotid artery disease) is mostly based on your family history and your diet.
While atherosclerosis of the arteries around the heart causes heart attacks, atherosclerosis of the carotid arteries is responsible for transient ischemic attacks, or mini-strokes. During a mini-stroke, the brain is briefly deprived of blood and the patient may experience the following symptoms:
- A sudden, severe headache
- Difficulty seeing
- Trouble speaking
- Sudden numbness in the face or extremities, often only on one side of the body
A Silent Killer
Carotid artery disease often presents with no symptoms and goes completely unnoticed by the patient. It’s extremely important to see a doctor immediately if you show any of the symptoms of a mini-stroke. Having regular cholesterol tests and physical exams can also help your identify your risk of carotid artery disease.
According to cardiologists in Florida Cardiovascular Institute of Northwest Florida (also known as Cardiology Associates), a number of minimally invasive treatment options (like carotid artery stenting) can help reduce your risk of a serious stroke in the future.