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Protek - Exhaust Primer – Air Operated Primer Pump
Exhaust Primers (EP) are air operated primers comprised of an Ejector and cast iron Adapter that has a cap and handle attached. Unit operates on low engine exhaust pressure or air pressure from other sources. When the exhaust valve (adapter cap) is closed, gases are directed through ejector, and water is drawn to pump by ejector vacuum.
- *Note: When ordering an EP, ejector size is determined by engine displacement in cubic inches.
- Example: displacement is 250 cubic inches; therefore you need an EP250-300. Adapter size is determined by size of exhaust tip and whether it is threaded or not.
- Simple design, no moving parts.
- Cast iron adapters come in a variety of sizes, to be mounted on a plain or threaded exhaust ends.
- Priming can be completed in 10 seconds to two minutes.
- Suction lifts of 20 ft. may be obtained under typical conditions.
- Units are designed to produce vacuum of 18 to 22 inches of mercury (Hg).
1. Use adapter to attach ejector to engine exhaust stack.
Pump discharge must be closed while priming. This can be done by installing a discharge check valve or hand operated gate valve.
2. Install vacuum gauge and priming valve on priming line, between the valve and ejector
Vacuum gauge should indicate priming rate of 18-22 Hg.
PSIs should be between 12 and 15 or 1500-2300 RPMs.
3. After priming is completed, lay handle and brass cap 180 degrees from priming position to allow exhaust to escape.