www.bullard.com
Free-Air® Pumps
User Manual
3
Pump P
erf
ormance T
ables
Number of Respirators that can be used
with Pumps
Depending on the pump model and style of respirator(s) being used,
Bullard EDP30 and EDP50 Free-Air Pumps will supply air for up to ten
(10) workers.
Refer to the respirator’s MSHA/NIOSH approved pressure range and
permissible air supply hose length. The Respirator’s Minimum Approved
Pressure must be 30 psig or less if using Model EDP30 or 15 psig or
less if using Model EDP50.
Maximum number of respirators at different air pressure
readings that can be used with EDP30 and EDP50 pumps
On the chart below, find the relevant Output Air Pressure (psig)
corresponding to the respirator’s approved pressure range to
determine the pump’s total air volume (cfm), and maximum number
of respirators that can be used at that air volume. For additional
information, the ampere loading on the pump’s motor is shown in the
right hand column.
EDP30 PUMP
Pump’s Output Air
Pressure (psig)
Pump’s Output Air
Volume (cfm)*
Maximum
Recommended Mask
Respirators**
Maximum
Recommended Hood
Respirators**
Motor Amp Load***
5
32
Six
Four
16
10
30
Six
Four
18
15
28
Five
Four
19
20
26
Five
Three
22
25
24
Four
Three
24
30
22
Four
Three
26
EDP30 PUMP WITH FRIGITRON 2000 AIR CONDITIONER
18-25
24-25
None
Two
17
EDP50 PUMP
Pump’s Output Air
Pressure (psig)
Pump’s Output Air
Volume (cfm)*
Maximum
Recommended Mask
Respirators**
Maximum
Recommended Hood
Respirators**
Motor Amp Load***
5
54
Ten
Seven
22
10
50
Ten
Seven
25
15
46
Nine
Six
28
* Assumes that no air is being dumped from Pressure Relief Valves.
** It should be noted that the Minimum Air Flow required for each tight-fitting mask style respirator is four (4) cfm and for
each hood style respirator is six (6) cfm.
The ratings which appear here, therefore, are conservative, but reflect Bullard’s position that worker respiratory
protection is enhanced when air flow available to the respirator wearer is above the NIOSH required minimums.
*** Motor Starter Overload Heater should not be exposed to more than 30 Amps of continuous electrical draw.
PUMP PERFORMANCE TABlES