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Available Thermostatic Control Valves
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How Thermostatic Control Valves works

When the liquid reaches a predetermined temperature, the elements open and divert the flow to a different port.
Liquid flows from yellow to red and is diverted to blue once the predetermined temperature is reached.
Installation Examples of Thermostatic Control Valves

Diverting System (Fig 1):
The liquid bypasses the cooler when cold & reaches the desired operating temperature quickly.

Mixing System (Fig 2):
Hot water from the heat source and cold water from the cooler are mixed in the valve.

Boiler Return:
Hot water from the boiler and cold water from the system are mixed in the valve.
FAQ - Thermostatic Control Valves
Why different housing materials are available?
FPE valves are available in cast iron, steel, stainless steel, ductile iron, aluminum and bronze. For information concerning these different materials, please contact your factory representative. Sometimes electrolysis may be encountered in a system. If this is the case, a zinc or magnesium waste plug can be installed in the valve at port A. If the valve is installed in seawater, cast iron housings are not generally satisfactory. In this type of installation, bronze valves must be used. In mounting the valve in a system, the valve must be properly vented so that the possibility of trapping air in the valve or around the elements is eliminated. A good rule to follow on systems is to place air vents so that air can be bled from the systems to a single collection point. Please note the vent lines in the different piping diagrams.
What about maintenance?
FPE thermostatic valves probably require less maintenance than any other type of similar use. Elements in normal service should be good for 6 to 10 years. Excessive temperatures, chemical, electrolytic or cavitation attack will of course shorten the life of the elements and seats which are replaceable. Carbonates, scale and other solids must not be permitted to build up on sliding valve or sensing cup surfaces.
How do I operate after installation?
After installation of the valve has been completed into the system, and operating of the valve has been started, system temperatures should be monitored so that the circuit is performing satisfactorily. Water cooling systems generally operate at a temperature at or slightly below the nominal temperature of the valve. Oil systems or more viscous fluids operate at temperatures at or slightly above the nominal temperature. To check an elements temperature, place the element in a water bath at a temperature of 5 degrees below the opening temperature of the element. Make sure you stir the water vigorously with the element for at least five minutes. Check the sliding valve to make sure it is not off its seat. Next, place the element in the same water bath at 25 degrees above the full open temperature reading and again stir vigorously for five minutes. Check the element and it should now by fully stroked. This can be determined by placing the element back into the FPE valve housing and pushing the element’s spider fully into the counter bore. FPE valves have an over travel spring which can be felt by pushing the element down into the counter bore. If this resistance is felt, the element is now fully stroked. Since the element has a tendency to cool quickly, you must do this last step before the element has cooled.
HOW OFTEN MUST THE CENTRIFUGE BE SERVICED?
It is our recommendation that the centrifuge be serviced at your normal oil and/or filter change interval.
WHAT ABOUT ADDITIVE DEPLETION?
Engine lube oil consists of two basic parts, BASE Oil (base stock) and ADDATIVE Package. The base stock is the primary lubricant and can be petroleum base or synthetic base. The additives are blended, in liquid form, into the base stock. The additive package performs four basic functions: A detergent to clean engine internals and prevent formation of sludge, dispersants that surround a solid particle when it hits the oil preventing sludge formation, an alkalinity additive to neutralize acids, anti wear and corrosion inhibitors. It is natural for these additives to be consumed in normal engine operation. The condemning limits for the various additives are known by the engine manufacture and the oil analysis companies. This information can be provided by them upon request.
HOW WILL THE CENTRIFUGE AFFECT OIL ADDITIVES?
The oil cleaning centrifuge is very helpful to the additive package. With its excellent solids removal rate the detergent in the lube oil lasts longer. Since these solids are removed by the Centrifuge they are no longer needed to be washed by the detergent. As a result of removing the solids from the oil this allows the dispersant to quickly surround a solid when it hits the oil. The additive package is blended into the lube oil, in solution form. The Spin-Clean Centrifuge will not separate solutions or remove additive from the lube oil.
WHAT ABOUT FUEL DILUTION?
Excessive fuel dilution within an engine can occur due to bad injectors or leaking fuel passages with the engine. Filtration cannot prevent fuel contamination due to mechanical failures of the fuel system. When this problem occurs, the mechanical cause must be found, fixed, and the oil changed. A common way that harmful fuel dilution can build up in a healthy engine is from solid contamination in the oil. This contamination prevents good piston ring sealing also known as "blow-by". Clean oil is the solution to problem and the reason why the Spin-Clean Oil Cleaning Centrifuge from FPE is a wise investment.
WHAT ABOUT SOLID CONTAMINATION?
Solid contamination comes in with intake air and is a product of fuel combustion. (Soot) These solids "blow-by" the piston rings into the lube oil within the crankcase. Engine manufacture's full-flow filters remove the 20-25 micron solids from the oil leaving the smaller particles to pass through. These particles load the oil, negatively impact the viscosity, and form a lapping compound which causes engine wear. The Spin-Clean Oil Cleaning Centrifuge will remove these microns down below one and prolong the life of the engine.
DOES THE COLOR OF THE OIL HAVE ANY BEARING ON ITS LUBRICATING ABILITY?
No! Many detergent oils will turn a dark blue-black after it is heated. Non-detergent oil will turn a reddish-brown and most diesel engine oils turn black in the first few minutes of running time. The only accurate way to determine an oils lubricating value or contamination level is through formal oil analysis.