Rotodynamic (Centrifugal) Slurry Pumps

12.0 Scope

This Standard is for rotodynamic (centrifugal), singlestage, overhung impeller slurry pumps, horizontal and vertical of industrial types, herein referred to as slurry pumps. It includes types and nomenclature; definitions; design and application; and installation, operation, and maintenance.

Air-Operated Pumps

10.1 Types and nomenclature

An air-operated pump is a positive displacement reciprocating pump used for general liquid transfer. It is driven by means of a compressed gas (usually air) from an outside source. Where “air” is used throughout this document, it should be taken to mean any compressed gas, but usually air.

Air-operated rotodynamic and rotary pumps are not included in this standard.

Pumps - General Guidelines

9.0 Scope

This Standard applies to all industrial/commercial pumps, including centrifugal, vertical, rotary and reciprocating types. It includes: types; definitions; design and application; airborne sound measurement and decontamination.

9.1 Types of pumps

Industrial/commerical pumps are used in an infinite variety of applications, and many different configurations of design are used to satisfy these requirements.

The different designs can be typified diagrammatically, as shown in Figure 9.1 on the following page. The first distinction is the manner in which the machine adds energy and moves the liquid.

9.1.1 Positive displacement pumps

Positive displacement pumps add energy by trapping liquid in a confined space and forcibly moving it out of the pump and into the discharge pipe. This pumping action is done by one of three methods:

1) Reciprocating action of plungers, pistons, bellows or diaphrams;

2) Rotary action of mechanical devices such as gears, screws, vanes, etc.;

3) Blow case arrangements using pressurized air to displace liquid.

9.1.2 Kinetic pumps

Kinetic pumps add energy by high-speed rotating wheels or impellers and fall into the following categories:

– Centrifugal, both horizontal and vertical turbine types;

– Regenerative turbine;

– Rotating casing with pitot tube.

Direct-Acting (Steam) Pumps

8.0 Scope

This Standard applies to direct acting (steam) pumps. It includes types and nomenclature; definitions; design and application; and installation, operation and maintenance.

Controlled-volume Metering Pumps

7.0 General description of controlled-volume metering pumps

Controlled-volume metering pumps (also known as metering pumps, proportioning pumps, chemical injection/ feed pumps, or dosing pumps) are reciprocating positive displacement pumps typically used for the injection of chemical additives, proportional blending of multiple components, or metered transfer of a single liquid. These types of pumps are used in applications requiring highly accurate, repeatable, and adjustable rate of flow.

The rate of flow of a controlled-volume pump is a function of the cross-sectional area of the plunger or piston, or displacement of the diaphragm; the stroke length; and the stroking speed. The pumping action is created by a reciprocating piston and controlled by suction and discharge check valves. The rate of flow is adjusted by changing the stroke length and/or the stroking speed.

Controlled-volume metering pumps are characterized by their ability to meet specific performance requirements concerning steady state accuracy, repeatability, and linearity.

Reciprocating Power Pumps

6.0 Scope

This Standard applies to reciprocating power pumps. It includes types and nomenclature; definitions; design and application; and installation, operation and maintenance.

Sealless Centrifugal Pumps

5.1.1 Scope

To develop the definitions and construction for sealless pumps that are driven by canned motors or magnetic couplings. These standards include types and nomenclature; design and application; installation, operation and maintenance; and test. Not included are submersible wastewater pumps which do not have external shaft seals and are therefore not susceptible to external shaft leakage.