Protek Exhaust Primers 60/90, 150/225, 250/300 and 350/500

Protek Exhaust Primers 60/90, 150/225, 250/300 and 350/500. An adapter is attached to the exhaust stack to which the ejector is attached, and a lever-operated "exhaust valve" is provided by which the engine exhaust gases are momentarily diverted through the ejector during the priming period. "Momentarily" means 10 seconds to 2 minutes depending on the suction lift and length and size of the suction line. It operates on low engine exhaust pressure. When the exhaust valve is closed, the gases are directed through the ejector nozzle and air is drawn from the pump through the ejector suction.

The Exhaust Primer is an air ejector adapted to an engine-driven pump. An adapter is attached to the exhaust stack to which the ejector is attached, and a lever-operated "exhaust valve" is provided by which the engine exhaust gases are momentarily diverted through the ejector during the priming period. It normally takes anywhere from10 seconds to 2 minutes depending on the suction lift and length and size of the suction line. Operating on low engine exhaust pressure, they are also semi-automatic, efficient, easy to install, and economical. Since there are no moving parts, they will last indefinitely. Under ideal conditions, at sea level, suction lifts of 25 ft may be obtained. For average conditions suction lifts up to 20 ft may be expected. All standard Protek Exhaust Primers are designed to operate at 12 to 15 lb pressure and thereby provide maximum lift and rapid priming. Note that exhaust primers generally will not work effectively on single cylinder engines because of the pulsating pressure effect, nor will they work well on two-cycle (two stroke) engines because this type engine does not produce enough back pressure for the ejector to function properly. Since the volume of the exhaust air discharged from an engine is dependent on its piston displacement and speed it is most important that the proper size ejector be used.

Specifications:

Required Operating Pressure: 12 to 14 exhaust pressure Time To Prime: Under normal conditions at sea level suction lift reach 15 feet in 1 minute and 20 feet in less than 2 minutes. Maximum Suction Lift: 20 feet under average conditions. Horsepower Range: 15 HP to 600 HP four cycle engines. Type Of Engine Required: Four Cycle (four stroke) engines. Will not work with single and two-cycle (two stroke) engines because they do not produce enough back pressure for the ejector to function properly. Construction: Cast iron adapters and solid cast bronze ejectors and valves.

Protek Exhaust Primers Selection Chart

Primer Model	Engine Displacement (Cubic Inches)
	50	100	150	200	250	300	400	500	600
	Engine RPM
60/90	2500	2000	1800	-	-	-	-	-	-
150/225	-	-	2300	2000	1800	1700	1200	-	-
250/300	-	-	-	2300	2200	2000	1600	1200	-
350/500	-	-	-	-	-	-	1900	1700	1400

The model number of each primer represents the approximate displacement (in cubic inches) of the engine for which it is intended. This may vary as the engine speed varies with each application. Engine speed is readily determined by watching the rate of vacuum change on the vacuum gauge.