Rotary Pumps. Use sliding vane positive
applications such as stripping pipelines or similar service
where the pump may frequently lose its prime. For these
pumps, provide a pressure relief valve on the discharge side
of the pumps. Use rotary pumps for pumping viscous liquids
where there is no reliable heat source. Consider requiring a
single-speed solid state starter with variable frequency drive
normal operating speed.
Drivers. Drive permanently installed pumps by an
electric motor which is properly classified in accordance with
NFPA 70. Size to be non-overloading at any point on the
Materials of Construction. Use carbon steel or
nodular iron casings and components. Refer to Section 4 of
this handbook for aviation turbine fuels requirements.
Installation. Mount permanently installed pumps on
substantial foundations of reinforced concrete designed in
accordance with Hydraulic Institute Standards. Provide drain
piping for pump and motor base, pump gland, or seal leakage
and vent valve. When the pump is in a pump house or pump
shelter, connect drains to an oil-water separator or waste
tank with piping which includes a vertical liquid trap.
Materials of Construction - General. Use carbon
steel bodies and bonnets on all valves except for aviation
turbine fuels. Internally epoxy-coated valves are acceptable
for general services but not as a substitute for a non-ferrous
valve. Do not use aluminum valves within a contained area.
Do not furnish nor install cast iron or bronze-bodied valves
in liquid petroleum service.
Special Consideration for Aviation Turbine Fuels.
Provide all valves in non-corrosive aviation turbine fuel
systems with aluminum or stainless steel bodies and not with
zinc, zinc-coated, copper, or copper bearing materials in
contact with the fuel. Electroplated nickel is permitted for
double seated plug valves and on nodular iron or cast steel
hydraulically operated diaphragm control valves within the