FSG 43 Pumps and Compressors

Question 1

What is Federal Supply Group 43?

Accepted Answer

FSG 43 is the Federal Supply Group (formally known as NATO Supply Classification Group NSG 43) in the USA for supply items codified in the category of Pumps and Compressors.

Question 2

What is NATO Supply Classification Group 43?

Accepted Answer

NSG 43 is the NATO Supply Classification Group (also known as Federal Supply Group FSG 43 in the USA) for supply items codified in the category of Pumps and Compressors.

Question 3

Which Federal Supply Classes are in FSG 43?

Accepted Answer

FSG 43 contains the following Federal Supply Classes (FSC) (formally known as NATO Supply Classification Class [NSC]): 4390,4310,4330,4370,4320,4340

Question 4

Which NATO Supply Classification Classes are in NSG 43?

Accepted Answer

NSG 43 contains the following NATO Supply Classification Classes (NSC) (also known as Federal Supply Class [FSC] in the USA): 4390,4310,4330,4370,4320,4340

Question 5

When did the transition from Federal Supply Groups (FSG) to NATO Supply Groups (NSG) occur?

Accepted Answer

The transition from Federal Supply Groups (FSG) to NATO Supply Groups (NSG) occurred on January 1, 1997. This change was implemented to align the classification and coding systems used by NATO member countries for military supplies and equipment. Federal Supply Groups (FSG) are now obsolete.

Question 6

What is a Reciprocating Compressor?

Accepted Answer

A Reciprocating Compressor (COMPRESSOR,RECIPROCATING) is a positive displacement compressor designed to compress air or gas from an initial intake pressure to a higher discharge pressure by means of reciprocating piston(s) in cylinder(s). It is designed to be driven by an independent power source, such as an electric motor, gasoline or diesel engine, or the like. It does not include the prime mover, air storage tank, and the like. It may include various peripheral components, such as drive pulley, unloader, and the like.

Question 7

What is an Intake Air Cleaner?

Accepted Answer

An Intake Air Cleaner (AIR CLEANER,INTAKE) is a device designed to prevent foreign particles from entering the air intake system of an internal combustion engine or air compressor. Excludes mufflers.

Question 8

What is a Dirt And Liquid Deflector?

Accepted Answer

A Dirt And Liquid Deflector (DEFLECTOR,DIRT AND LIQUID) is an item so shaped as to deflect one or more of the following: dust, dirt, grease, oil, or liquid into a desired direction or away from a particular area. Can be attached to a stationary or with a revolving part.May or may notbe a mechanical device.

Question 9

What is a Diffusion Vacuum Pump?

Accepted Answer

A Diffusion Vacuum Pump (VACUUM PUMP,DIFFUSION) is a vacuum pump used to create extremely low pressure by means of heating and pumping a fluid through one or more stages and passing the hot vapors through one or more jets.

Question 10

What is a Diffusion And Rotary Vacuum Pump Unit?

Accepted Answer

A Diffusion And Rotary Vacuum Pump Unit (VACUUM PUMP UNIT,DIFFUSION AND ROTARY) is an assembled unit consisting of a commonly mounted diffusion vacuum pump(s), rotary vacuum pump(s), prime mover(s), and the necessary components to provide for a complete operation. It may include a vacuum storage tank(s).

Question 11

What is a Breather?

Accepted Answer

A Breather is a mechanical device designed to permit a free flow of air into and out of an enclosure, usually used on engine crankcase, vehicular differentials and transmissions, pumps, compressors, and the like.  See also CAP, VENT, FUEL STORAGE TANK.  excludes VENTALATOR (as modified).

Question 12

What is a Piston Ring?

Accepted Answer

A Piston Ring (RING,PISTON) is a circular, single or multipiece item, metallic or nonmetallic in composition, designed to be fitted in a circumferential groove in a piston and to spring outward against the cylinder wall to function as a seal or wiper. It is supplied in various cross-sectional shapes and is cut through at one point to allow for installation in the piston ring groove. It may include an expander. Excludes PACKING, PREFORMED; RETAINER, OIL SEAL; RETAINER, PACKING; RING, RETAINING; RING WIPER; and SEAL RING, METAL.

Question 13

What is an Electric Diffusion Vacuum Pump Heater?

Accepted Answer

An Electric Diffusion Vacuum Pump Heater (HEATER,DIFFUSION VACUUM PUMP,ELECTRIC) is an electric heating device, the heating element of which generally is formed in an increasingly elevated spiral for the purpose of fitting around the hemispherical base of a diffusion pump.

Question 14

What is a Valve Spring Retainer Lock?

Accepted Answer

A Valve Spring Retainer Lock (LOCK,VALVE SPRING RETAINER) is a metal item designed for the purpose of securing an engine or compressor valve and positioning the valve spring or valve spring retainer. Excludes cotter pins, straight pins, keys and washers.

Question 15

What is a Piston Ring Set?

Accepted Answer

A Piston Ring Set (RING SET,PISTON) is two or more complete RING, PISTON grouped for a single piston or for all pistons of an internal combustion engine, air compressor, or the like.

Question 16

What is a Piston Pin?

Accepted Answer

A Piston Pin (PIN,PISTON) is a cylindrically-shaped metal item, usually tubular, designed to form a pivoting connection between the piston and connecting rod of an internal combustion engine, compressor and like items. May include oil sealing or pin retaining plugs. Excludes BUSHING, SLEEVE; PIN, GROOVED, HEADLESS; PIN, STRAIGHT, HEADLESS; and PIN, HOLLOW.

Question 17

What is a Cylinder Sleeve?

Accepted Answer

A Cylinder Sleeve is a tubular metal item designed primarily as a replaceable wear surface within the cylinder bore of a piston type internal combustion engine, compressor, or reciprocating pump.

Question 18

What is a Pressure Regulating Pump Governor?

Accepted Answer

A Pressure Regulating Pump Governor (GOVERNOR,PUMP,PRESSURE REGULATING) is a governor specifically designed to regulate the discharge pressure of reciprocating or turbine driven pumps. It may be actuated by either the pump discharge fluid or air flow from an external pilot valve.

Question 19

What is a Centrifugal Compressor?

Accepted Answer

A Centrifugal Compressor (COMPRESSOR,CENTRIFUGAL) is a nonpositive displacement compressor designed to compress air or gas from an initial intake pressure to a higher discharge pressure by means of bucketed or finned type rotary impeller(s) inclosed in a housing. It is designed to be driven by an independent power source, such as an electric motor, gasoline or diesel engine, or the like. It does not include the prime mover, air storage tank, and the like. It may include various peripheral components, such as drive pulley, unloader, and the like.

Question 20

What is a Magnetic Unloader?

Accepted Answer

A Magnetic Unloader (UNLOADER,MAGNETIC) is an item designed for the purpose of unloading an air compressor at the end of a pumping operation or at any time when voltage failure occurs.

Question 21

What is a Reciprocating Compressor Cylinder?

Accepted Answer

A Reciprocating Compressor Cylinder (CYLINDER,RECIPROCATING COMPRESSOR) is a cylinder designed to compress air or gas from an initial intake pressure to a higher discharge pressure. Excludes cylinder assemblies.

Question 22

What is a Compressor Piston?

Accepted Answer

A Compressor Piston (PISTON,COMPRESSOR) is a cylindrical piece which moves or reciprocates in a cylinder to compress air or gas from an initial intake pressure to a higher discharge pressure. May include integral connecting rod.

Question 23

What is a Sediment Strainer Head?

Accepted Answer

A Sediment Strainer Head (HEAD,SEDIMENT STRAINER) is a component of a sediment strainer designed to contain the inlet and/or outlet ports of the strainer. It acts as a cover and attaches to the BOWL, SEDIMENT or mounts directly to an integral cavity in an engine, manifold, casing, or the like. The item may include relief, check, and/or by-pass valves, means for supporting the strainer element, and means for mounting the strainer. The item does not include a strainer element. Excludes HEAD, FLUID FILTER.

Question 24

What is a Compressor Piston Assembly Parts Kit?

Accepted Answer

A Compressor Piston Assembly Parts Kit (PARTS KIT,PISTON ASSEMBLY,COMPRESSOR) is a parts kit used for replacing the worn and/or damaged parts used in a compressor piston assembly. It may include such items as a connecting rod, piston pin, bearing(s), cotter pin(s), retainer(s), washer(s), and the like.

Question 25

What is a Compressor Unloader Parts Kit?

Accepted Answer

A Compressor Unloader Parts Kit (PARTS KIT,COMPRESSOR UNLOADER) is a parts kit consisting of a group of replacement items for spring or magnet operated unloaders.

Question 26

What is a Centrifugal Compressor Unit?

Accepted Answer

A Centrifugal Compressor Unit (COMPRESSOR UNIT,CENTRIFUGAL) is an assembled unit consisting of a commonly mounted centrifugal compressor(s) and a prime mover(s). For items with additional equipment which extends the function of the unit beyond the delivery of compressed air or gas, see more specific names, as applicable. Excludes AUXILIARY SET, ENGINE DRIVEN.

Question 27

What is a Reciprocating Compressor Unit?

Accepted Answer

A Reciprocating Compressor Unit (COMPRESSOR UNIT,RECIPROCATING) is an assembled unit consisting of a commonly mounted reciprocating compressor(s) and a prime mover(s). For items with additional equipment which extends the function of the unit beyond the delivery of compressed air or gas, see PNEUMATIC TOOL AND COMPRESSOR OUTFIT, or more specific names, as applicable. Excludes AUXILIARY SET, ENGINE DRIVEN.

Question 28

What is a Rotary Compressor Unit?

Accepted Answer

A Rotary Compressor Unit (COMPRESSOR UNIT,ROTARY) is an assembled unit consisting of a commonly mounted rotary compressor(s) amd a prime mover(s). For items with additional equipment which extends the function of the item beyond the delivery of compressed air or gas, see PNEUMATIC TOOL AND COMPRESSOR OUTFIT, or other more specific names, as applicable. Excludes AUXILIARY SET, ENGINE DRIVEN.

Question 29

What is a Rotary Compressor?

Accepted Answer

A Rotary Compressor (COMPRESSOR,ROTARY) is a positive displacement compressor designed to compress air or gas by means of rotating elements inclosed in a housing. The rotating elements may be classified as (1) Sliding Vane, which is a combination of longitudinal vanes and rotor, (2) Axial Screw, which consists of two or more symmetrically-formed helical rotors mounted on parallel shafts, (3) Two Impeller, which consists of mated lobed impellers, symmetrical in design synchronized by a pair of gears, (4) Liquid Piston, which is a rotor with shrouded vanes wherein water or other liquid is used as a sealing agent. It is designed to be driven by an independent power source such as an electric motor, gasoline or diesel engine, or the like. It does not include the prime mover, air storage tank, and the like. It may include various peripheral components such as drive pulley, unloader, and the like.

Question 30

What is a Reciprocating Vacuum Pump?

Accepted Answer

A Reciprocating Vacuum Pump (VACUUM PUMP,RECIPROCATING) is a vacuum pump used to create extremely low pressure by means of reciprocating element(s) in an enclosure(s). It is designed to be driven manually or by a prime mover which is not an integral part of the pump. It may include a vacuum storage tank(s) and various peripheral components such as driven pulleys.

Question 31

What is a Reciprocating Vacuum Pump Unit?

Accepted Answer

A Reciprocating Vacuum Pump Unit (VACUUM PUMP UNIT,RECIPROCATING) is an assembled unit consisting of a commonly mounted reciprocating vacuum pump(s), prime mover(s), and the necessary components to provide for a complete operation. It may include a vacuum storage tank(s).

Question 32

What is a Rotary Vacuum Pump?

Accepted Answer

A Rotary Vacuum Pump (VACUUM PUMP,ROTARY) is a vacuum pump used to create extremely low pressure by means of a rotating element(s) in an enclosure. It is designed to be driven manually or by a prime mover which is not an integral part of the pump. It may include a vacuum storage tank(s) and various peripheral components such as driven pulleys.

Question 33

What is a Rotary Vacuum Pump Unit?

Accepted Answer

A Rotary Vacuum Pump Unit (VACUUM PUMP UNIT,ROTARY) is an assembled unit consisting of a commonly mounted rotary vacuum pump(s), prime mover(s), and the necessary components to provide for a complete operation. It may include vacuum storage tank(s).

Question 34

What is a Valve Stem Guide?

Accepted Answer

A Valve Stem Guide (GUIDE,VALVE STEM) is a replaceable cylindrical item designed to provide wear surface and maintain alignment of a reciprocating valve stem and the like, it may have a flange(s) and/or grooves.

Question 35

What is a Fluid Filter Assembly?

Accepted Answer

A Fluid Filter Assembly (FILTER ASSEMBLY,FLUID) is two or more FILTER, FLUID on a common mounting or mounted on each other. They may be separable and operate in series, parallel, or individually.

Question 36

What is an Air Cleaner Intake Pipe Cap?

Accepted Answer

An Air Cleaner Intake Pipe Cap (CAP,AIR CLEANER INTAKE PIPE) is a cap that shields the air cleaner intake pipe from rain, snow, and large particles of foreign matter such as twigs, hay, straw, and the like. It also confines the oil spray from the oil bath air cleaner when the engine backfires or rollback occurs.

Question 37

What is an Air Filter Parts Kit?

Accepted Answer

An Air Filter Parts Kit (PARTS KIT,AIR FILTER) is a collection of items used to repair/replace air filters. May include mounting hardware. Excludes PARTS KIT (1),BRAKE CHAMBER.

Question 38

What is a Compressor Parts Kit?

Accepted Answer

A Compressor Parts Kit (PARTS KIT,COMPRESSOR) is a parts kit used to repair a COMPRESSOR (1),CENTRIFUGAL; COMPRESSOR (1), RECIPROCATING; COMPRESSOR (1), RECIPROCATING AND ROTARY; COMPRESSOR (1), ROTARY. Excludes PART KIT (1), BRAKE AIR COMPRESSOR; PARTS KIT (1), PISTON ASSEMBLY, COMPRESSOR.

Question 39

What is a Separator Parts Kit?

Accepted Answer

A Separator Parts Kit (PARTS KIT,SEPARATOR) is a parts kit used to repair an air-oil separator or air-water separator.

Question 40

What is a Vacuum Pump Parts Kit?

Accepted Answer

A Vacuum Pump Parts Kit (PARTS KIT,VACUUM PUMP) is a parts kit used to repair a VACUUM PUMP, DIFFUSION; VACUUM PUMP, RECIPROCATING; or VACUUM PUMP, ROTARY.

Question 41

What is a Valve Head?

Accepted Answer

A Valve Head (HEAD,VALVE) is an item designed to mate with a hydraulic or pneumatic valve body. It must have inlet and/or outlet port(s). For items without ports see CAP (1), VALVE.

Question 42

What is an Oil Pan?

Accepted Answer

An Oil Pan is a metal item designed to be attached to the lower portion of an internal combustion engine, compressor, hydraulic transmission, and the like. It serves as a reservoir for lubrication oil and may include baffle(s), oil cooler connectors, or the like. For items furnished with gasket(s), hardware, drain plugs, and the like, see PARTS KIT, OIL PAN.

Question 43

What is a Special Shaped Pump Diaphragm?

Accepted Answer

A Special Shaped Pump Diaphragm (DIAPHRAGM,PUMP,SPECIAL SHAPED) is an item constructed of one or more layers of thin flexible material, either laminated or separated. It is designed to form a tight seal between the openings of a pump and to transmit pressure inducted motion either directly or through a mechanical linkage. The item may contain bolt holes and&#47;or a center hole. Excludes DIAPHRAGM, VALVE, SPECIAL SHAPED.

Question 44

What is a Flywheel Housing?

Accepted Answer

A Flywheel Housing (HOUSING,FLYWHEEL) is an item designed to enclose the flywheel and related parts, clutch, plates, ring gear and the like on the end of the cylinder block. May be fabricated from a single casting or compound of two separate castings and may include mounting facilities.

Question 45

What is a Vacuum Pump Impeller?

Accepted Answer

A Vacuum Pump Impeller (IMPELLER,VACUUM PUMP) is an item consisting of blades, vanes or paddles equally spaced around the periphery of a hub, Rotor, or wheel. It is the rotating part of a VACUUM PUMP (1), ROTARY.

Question 46

What is an Exhaust-Intake Pneumatic Muffler?

Accepted Answer

An Exhaust-Intake Pneumatic Muffler (PNEUMATIC MUFFLER,EXHAUST-INTAKE) is a noise control/filtering device of various sizes, shapes, designs, materials (metallic/non-metallic) and varied mounting configurations used to diffuse air blasts, lowers air velocity, reduce noise, filtration of airborne moisture and/or dust contamination, pressure equalization, speed control for air operated devices. For vehicular application see MUFFLER, (as modified).

Question 47

What is an Intake Air Cleaner Deflector?

Accepted Answer

An Intake Air Cleaner Deflector (DEFLECTOR,AIR CLEANER,INTAKE) is a generally metallic item of various shapes designed to deflect an airflow into or away from the intake air cleaner of a combustion engine/compressor. Excludes DEFLECTOR, AIRFLOW.

Question 48

What is a Compressor Flywheel?

Accepted Answer

A Compressor Flywheel (FLYWHEEL,COMPRESSOR) is a circular metal item specifically designed to be attached to a machine that reduces volume so that its expansion may be utilized as a source of power. It can reduce the fluctuations of the machine during changes of speed and/or overcome the deadpoints of the piston. Excludes FLYWHEEL, ENGINE.

Question 49

What is a Reed Valve?

Accepted Answer

A Reed Valve (VALVE,REED) is a metallic device with coiled spring(s) or flexible finger(s) designed to fluctuate off and on a sealed surface. May contain a seat valve, valve guard, screws and the like. Replaces poppet valve in small compressors and two cycle engines.

Question 50

What is a Compressor Sludge Separator Parts Kit?

Accepted Answer

A Compressor Sludge Separator Parts Kit (PARTS KIT,COMPRESSOR SLUDGE SEPARATOR) is a kit composed of various items used to separate solids from liquids. May include filters and screens.

Question 51

What is a Valve Reed Strip?

Accepted Answer

A Valve Reed Strip (REED STRIP,VALVE) is a singular or multiple flexible finger type bi-metal strip designed to be used in conjunction with a VALVE REED.

Question 52

What is a Reed Valve Plate?

Accepted Answer

A Reed Valve Plate (PLATE,REED VALVE) is a metallic item designed to be used for attaching various parts, such as a guard valve strip, valve strip(s) and the like. May be used in conjunction with a REED STRIP, VALVE.

Question 53

What is a Compressor Sludge Separator?

Accepted Answer

A Compressor Sludge Separator (SEPARATOR,SLUDGE,COMPRESSOR) is an item designed to automatically remove residue and water from reservoir or air supply lines when pressure is applied and dispenses into atmosphere. May be controlled by governor cycle.

Question 54

What is an Air Compressor Housing?

Accepted Answer

An Air Compressor Housing (HOUSING,AIR COMPRESSOR) is an airtight housing for the internal mechanism of a machine which increases the pressure of incoming air before releasing it. Bored for related component parts.

Question 55

What is a Valve Stop Plate?

Accepted Answer

A Valve Stop Plate (PLATE,VALVE STOP) is a dish shaped metallic device with varying shaped holes designed to limit the vertical travel of the valve spring components. It may provide a seating surface, while keeping the inlet and/or discharge valve components properly aligned during operation.

Question 56

What is a Valve Strip Guard?

Accepted Answer

A Valve Strip Guard (GUARD,VALVE STRIP) is a metallic item designed to be used in conjunction with a PLATE, REED VALVE and/or VALVE, REED.

Question 57

What is a Compressor Mounting Plate?

Accepted Answer

A Compressor Mounting Plate (PLATE,COMPRESSOR MOUNTING) is a metallic item with a basically flat cross-section that is designed to attach the compressor to a structural component such as the bulkhead, frame, or the like of an end item. It may be angled to facilitate ease of mounting.

Question 58

What is a Pumps And Compressors Modification Kit?

Accepted Answer

A Pumps And Compressors Modification Kit (MODIFICATION KIT,PUMPS AND COMPRESSORS) is an item or group of items used to modify pumps and compressors.

Question 59

What is a Reciprocating Compressor Piston Guide Piston?

Accepted Answer

A Reciprocating Compressor Piston Guide Piston (PISTON,PISTON GUIDE,RECIPROCATING COMPRESSOR) is an item which is attached to the connecting rod by means of a piston pin and which is provided with a means for attaching the piston rod assembly. It may have a groove(s) for an oil and/or wiper ring, but it is never designed for compression action.

Question 60

What is a Gage And Valve Assembly?

Accepted Answer

A Gage And Valve Assembly is an assembly of items consisting of one or more gages and one or more valves joined together on a common mount.

Question 61

What is a Compressor Valve Plate?

Accepted Answer

A Compressor Valve Plate (VALVE PLATE,COMPRESSOR) is an item of various sizes and shapes, rigid, flat and generally smooth. It is normally located between the top of the body and the head. It may include valve ports, and may be issued with gaskets, washers, springs, bolts, disc and the like.

Question 62

What is a Compressor Compressed Air Cooler?

Accepted Answer

A Compressor Compressed Air Cooler (COOLER,COMPRESSED AIR,COMPRESSOR) is an item designed to lower the temperature of the compressed air by having air flow through pipes immersed in water.

Question 63

What is an Intake Air Cleaner Filter Body?

Accepted Answer

An Intake Air Cleaner Filter Body (FILTER BODY,INTAKE AIR CLEANER) is a part of an AIR CLEANER, INTAKE designed as a housing for a FILTER ELEMENT, INTAKE AIR CLEANER. Depending on the configuration, the item may be mounted at the top, the bottom or by means of a flanking flange. In general, the housing is a multipiece item and has air intake and air outlet.

Question 64

What is an Air Compressor Base?

Accepted Answer

An Air Compressor Base (BASE,AIR COMPRESSOR) is an item which provides a stationary foundation upon which the compressor is mounted. For items which attach the compressor to the frame or superstructure of the end item, see PLATE,COMPRESSOR MOUNTING.

Pumps and Compressors

Federal Supply Group (FSG): 43

NATO Supply Classification Group (NSG): 43

NSN Format for Pumps and Compressors

Additional Information for Pumps and Compressors

NATO Supply Group 43: All About Pumps and Compressors

Compressors and Vacuum Pumps

Centrifugals, Separators, and Pressure and Vacuum Filters

Power and Hand Pumps

Frequently Asked Questions (FAQ) for Federal Supply Group 43

Top 20 Supply Items Included in Federal Supply Group 43

Stock Items for FSG 43 Page 81 of 749