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Standard Pump Operating Instructions and Parts Manual (OIPMS0611)
Grounding Procedures
TRANSFERRING OF FLAMMABLES OR USE IN HAZARDOUS DUTY
Bonding is an e
lectrical connection between a primary metal vessel and a metal receiving vessel. See schematic.
Grounding is an electrical connection between a metal vessel, pump, motor and a constant ground; i .e . a metal rod driven into
the earth.
Bonding and grounding are required when pumping flammable materials or in hazardous duty environments. Failure to bond
and ground properly can cause a discharge of static electricity resulting in fire, injury or death. Follow NFPA 77 and 30 proce
-
dures at all times . If in doubt, do not start pump! Be sure bonding and grounding wires are secure before starting operation .
(Ground and bond wires must have less than one ohm resistance for safe usage. Check continuity before starting). Always check
with a safety engineer when any question arises and periodically check safety procedures with a safety engineer
Motor: SP-A1 or SP-A2 Series
Pump Tube: SP-8100, SP-8200, SP-8800 or SP-8900 Series
Use Of Air Motors In Hazardous Atmospheres
At the present time, there are no known standards governing the operation of air motors in hazardous atmospheres. However,
there are several points regarding the safety of air motors.
First of all, an air motor is not a source of electric sparks. However, it is possible that an article which is not part of the air motor
(e.g., wrenches, hammers, etc.) could create a spark by sharply impacting a cast iron or aluminum case or the steel shaft of the
air motor. (Note that electric motor enclosures for both class I and II hazardous locations can be made of “...iron, steel, copper,
bronze, or aluminum...” (UL 674, Electric Motors and Generators – Hazardous Locations, June 23, 1989; paragraph 4.2, page 6).
Second, an air motor housing is not designed to contain an internal explosion as is an explosion-proof electric motor. The only
possible internal source of ignition in an air motor is a contact between the station housing components and the rotating
elements that might create a spark. The likelihood of this occurring is reduced by the fact that the contact must be made at
precisely the same time as a flammable or explosive gas is introduced into the air motor in a sufficient quantity to achieve
a flammable or explosive mixture while overcoming the positive pressure of the driving gas. In other words, although highly
improbable, an internal explosion in an air motor is possible.
Finally, an air motor is designed to be operated by compressed air, the expansion of which in normal operation creates a cooling
effect. As a result, the temperature of the air motor will not exceed the height of the temperatures of the surrounding
atmosphere or the air delivered to the inlet.
We do not guarantee the safety of every application, but to ensure the safe operation of an air motor in your application, always
follow the product direction and consult with a qualified engineer.
(Source: Gast Manufacturing, Air Motors Handbook, page 2)
Note:
This statement is only applicable in North America.
Earth Ground
e ground
Exhaust Line
Air Line
Bond Wire
Rod
Ground Wire
Solvent resistant safety
hose with wir
Metal Drum