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Text Version

Typical System Layout Low Volume/High Velocity with Chart

Typical system shown with piping sizes of 2 1/8" for 7" - 72,000 rpm Disc sander(2 1/8"), 2 1/8" for chipping hammer (2 1/2"), 2 1/8" for 6" - 10,000 rpm Cup stone grinder (3"), 2 1/8" piping for 6" X 1", 10,000 rpm Wheel grinder (3 1/2"), and 2 1/8" piping for Swing Frame grinder( 2 1/2"). Fittings are in parentheses following each machine type. All lines flow into 4" piping connected to primary separator, dust collector, with recommended automatic bag cleaner, and exhauster to atmosphere.

	cfm	I.D. Plastic Hose Size
Disk sanders 3-9 inch diameter	60-175	1 - 1.5
Vibratory Pad Sander - 4" X 9"	100	1.25
Router, 1/8" to 1"	80-100	1 - 1.25
Belt Sander, 3" - 4000 cfm	70	1
Pneumatic chisel	60	1
Radial Wheel Grinder	70	1
Surface Dye Grinder, 1/4"	60	1
Cone Wheel Grinder	90	1.25
Cup Stone Grinder, 4"	100	1.25
Cup Type Brush, 6"	150	1.5
Radial Wire Brush, 6"	90	1.25
Hand Wire Brush 3" X 7"	60	1
Rip Out Knife	175	1.5
Rip Out Cast Cutter	150	1.5
Saber Saw	120	1.5
Swing Frame Grinder	380	2.25
Saw Abrasive 3"	100	1.25

System Notes:

Bell and socket, smooth - flow type tubing and fittings should be used throughout the system. When system is used for vacuum cleaning of abrasive materials, schedule Nol40 pipe and cast iron drainage fittings, or heavier, should be used in place of tubing.

From American Conference of Governmental Industrial Hygienists (ACGIH®), Figure VS-40-20, Industrial Ventilation : A Manual of Recommended Practice, 23^rd Edition. Copyright 1988. Reprinted with permission.

Text Version

Hygiene Facility

Hygiene facility floor plan:

Street
Side
Entry

(A)

Street Side Locker Room

(B)

Storage Lockers

Hand Washing Stations

(J)

Lunchroom
(K)

Vending Machines

Work Clothes Vacuum Station(I)

Plant side Entry (E)

Clean Issue

Dirty Turn-in

Restroom
(F)

Cloak Room (G)

Shoe Cleaning Machines
(H)

Laundry

Showers

(C)

Plant side Locker Room (D)

Autoshower (N)

Facility Function/Description:

The facility can be entered from the street at only one point. (A)
Street clothes are removed and clean work clothes, hardhat, and respirator are issued and donned in the street side locker room. (B)
The employee passes through a one-way turnstile in order to get to the plant-side locker room. (C)
The employee dons work boots and other safety gear in the plant-side locker room where they are stored. (D)
There is only one entry to the plant. (E)
The restroom just inside the cloak room is readily accessible during working hours. (F)
The cloak room provides a place to store coats, hardhats, gloves and respirators during break periods. (G)
During lunch break the employee first cleans his boots at the shoe cleaning machines (H), leaves coat and equipment in the cloak room (G), vacuums off his clothes at the vacuum stations (I), proceeds to the hand washing station where he thoroughly washes his hands (J), and finally enters the lunch room. (K)
At the end of the shift the procedure is as follows: the employee cleans shoes (H), removes contaminated clothing in the plant side locker room (D), stores boots, etc. in plant-side lockers, turns in dirty work clothes, hardhat and respirator to laundry (L), and proceeds to the showers. (M) He then must pass through an automatic shower (N) to return to the street-side locker room (B), where he dresses and leaves the facility. (A)

Engineering Controls » Central Vacuum System

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A central vacuum system is used by plant personnel to remove lead oxide dust from their workstations. Tools can also be connected the system to capture dust at the source of generation for some operations, such as grinding.

Central vacuum system

Design Specifications

Design of a central vacuum system depends on the number of active work points (hoses and tools) operating at the same time that is desired. Sometimes, the system would be very large and expensive if the number of active points is high. The size and cost of the system can be reduced by:

Staggering the clean-up period.
Minimizing the number of active stations used at any one time.

Manufacturers and vendors of the equipment will size the vacuum unit, filter or bag unit, centrifugal separator, and bleed control with a silencer to suit the final number of work points.

If a drawing or dimensional sketch is provided to the supplier, most suppliers will size the collection system, tubing, fittings, and headers, along with the type and number of fittings required to match the application.

The choice of the length and type of hose, along with the type of tools needed, depend on the workstation. Suppliers can provide listings of available accessories, shutoff valves, tools, and hoses.

To have an efficiently operating system, the installation of the equipment should conform to the supplier's instructions. All piping, work points, and valves should be properly supported.

Diagrams

Text Version

Typical System Layout Low Volume/High Velocity with Chart

	cfm	I.D. Plastic Hose Size
Disk sanders 3-9 inch diameter	60-175	1 - 1.5
Vibratory Pad Sander - 4" X 9"	100	1.25
Router, 1/8" to 1"	80-100	1 - 1.25
Belt Sander, 3" - 4000 cfm	70	1
Pneumatic chisel	60	1
Radial Wheel Grinder	70	1
Surface Dye Grinder, 1/4"	60	1
Cone Wheel Grinder	90	1.25
Cup Stone Grinder, 4"	100	1.25
Cup Type Brush, 6"	150	1.5
Radial Wire Brush, 6"	90	1.25
Hand Wire Brush 3" X 7"	60	1
Rip Out Knife	175	1.5
Rip Out Cast Cutter	150	1.5
Saber Saw	120	1.5
Swing Frame Grinder	380	2.25
Saw Abrasive 3"	100	1.25

System Notes:

Text Version

Hygiene Facility

Hygiene facility floor plan:

Street
Side
Entry

(A)

Street Side Locker Room

(B)

Storage Lockers

Hand Washing Stations

(J)

Lunchroom
(K)

Vending Machines

Work Clothes Vacuum Station(I)

Plant side Entry (E)

Clean Issue

Dirty Turn-in

Restroom
(F)

Cloak Room (G)

Shoe Cleaning Machines
(H)

Laundry

Showers

(C)

Plant side Locker Room (D)

Autoshower (N)

Facility Function/Description:

The facility can be entered from the street at only one point. (A)
Street clothes are removed and clean work clothes, hardhat, and respirator are issued and donned in the street side locker room. (B)
The employee passes through a one-way turnstile in order to get to the plant-side locker room. (C)
The employee dons work boots and other safety gear in the plant-side locker room where they are stored. (D)
There is only one entry to the plant. (E)
The restroom just inside the cloak room is readily accessible during working hours. (F)
The cloak room provides a place to store coats, hardhats, gloves and respirators during break periods. (G)
During lunch break the employee first cleans his boots at the shoe cleaning machines (H), leaves coat and equipment in the cloak room (G), vacuums off his clothes at the vacuum stations (I), proceeds to the hand washing station where he thoroughly washes his hands (J), and finally enters the lunch room. (K)
At the end of the shift the procedure is as follows: the employee cleans shoes (H), removes contaminated clothing in the plant side locker room (D), stores boots, etc. in plant-side lockers, turns in dirty work clothes, hardhat and respirator to laundry (L), and proceeds to the showers. (M) He then must pass through an automatic shower (N) to return to the street-side locker room (B), where he dresses and leaves the facility. (A)

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Engineering Controls » Central Vacuum System

Central vacuum system

Design Specifications

Diagrams