Pneumatic Pressure Controllers
PP901; PP902 Pressure Reducing Valves
Used to control the pressure of the air delivered to pneumatic
control systems. Models available for single-pressure systems or
two-pressure systems (Day/Night or Summer/Winter) requiring two
independently regulated pressure settings. Dual-pressure units
switch from the lower settings to the higher settings when main air
is applied to the pilot port. Models also available including a submicron filter assembly and pressure gauges. Replacement devices
are available for Johnson, Powers, Robertshaw, Barber-Colman
and older Honeywell pressure reducing valves.
• Built-in adjustable safety relief valve for limiting downstream
pressure.
• For two-pressure models: Pressure changes accomplished with
manual switch or automatically with electric pneumatic switch.
• Adjustable stops for desired settings.
Application Type: Pressure Reducing
Connection Size: Inlet and out air: 1/4 in. NPT (female) Air gage: 1/8
in. NPT (female)
Mounting: Bracket furnished
Accessories:
305917-2 in. diameter, 1/4 NPT center stem back mount Pressure
Indicating gauge (0 to 160 psi scale) with ±3% accuracy
804191E-2-1/2 in. diameter, panel-mounted Pneumatic Pressure
Indicating Gauge (0 to 160 psi), 1/8 in. NPT connection, +/-3%
accuracy
305965-1-1/2 in. diameter, 1/8 NPT center stem back mount Pressure
Indicating gauge (0 to 30 psi scale) with ±4% accuracy
Inlet Pressure
Range Output Pressure Range
Product Number
PP901A1004/U 45 to 150
PP901B1002/U 45 to 150
PP902C1009/U 45 to 150
PP902D1007/U 45 to 150
psi
psi
psi
psi
310 to
1034 kPa
310 to
1034 kPa
310 to
1034 kPa
310 to
1034 kPa
primary pressure:
adj.0 to 25 psi.
primary pressure:
adj.0 to 25 psi;
secondary pressure:
adj. 0 to 5 psi above
primary rating
primary pressure:
adj.0 to 25 psi
primary pressure:
adj.0 to 25 psi;
secondary pressure:
adj. 0 to 5 psi above
primary rating
primary pressure:
adj.0 to 172 kPa.
primary pressure:
adj.0 to 172 kPa;
secondary pressure:
adj. 0 to 34kPa above
primary setting.
primary pressure:
adj.0 to 172 kPa.
primary pressure:
adj.0 to 172 kPa;
secondary pressure:
adj. 0 to 34kPa above
primary setting.
Replacement Parts:
316203A-Pressure Regulator Valve Assembly for PP901A; PP902A, C
316134B-PP901A & B Diaphragm Repair Kit
14004203-001-Filter cartridge kit for PP902C and PP902D.
14004205-002-Filter Station Assembly for PP901, PP902A or B
14003121-002-Filter for PP902A or B
Description Includes(psi) (kPa) (psi) (kPa)
High Pressure Diaphragm Operated Reducing
Valve with Built-in Adjustable Relief Valve for
Single Pressure Systems. Includes Mounting
Bracket and Gage Taps But No Gages.
High Pressure Diaphragm Operated Reducing
Valve with Built-in Adjustable Relief Valve for
Dual Pressure Systems. Includes Mounting
Bracket and Gage Taps But No Gages.
Pressure Reducing Valve for Single Pressure
Systems, consists of a PP901A Valve, a submicron filter station, 2 psig gages,
Interconnecting Pipe Fittings, and a Mounting
Bracket
Pressure Reducing Valve for Dual Pressure
Systems, consists of a PP901B Valve, a submicron filter station, 2 psig gages,
Interconnecting Pipe Fittings, and a Mounting
Bracket
Gage tapping
to measure
the regulated
pressure.
Gage tapping
to measure
the regulated
pressure.
Submicron
filter assembly
and two psig
gages.
Submicron
filter assembly
and two psig
gages.
Pneumatic
Controls
70-6910 667
Pneumatic Pressure Controllers
1-1/ 2
(38)
1/4 NPT
OUTLET
1/4 NPT
INLET
C5146
GAGE
CONNECTION
1/8 NPT
SWITCHOVER
INLET PORT
(PP901B ONLY)
2-1/4
(57)
3-1/4 (83)
4-7/8
(124)
IN
231
EX
FROM
COMPRESSOR
FILTER
OUT
PRV
REDUCED
PRESSURE
TO SYSTEM
C5544
TO AUTOMATIC OR
MANUAL SWITCHOVER
CONTROL
EP RELAY
PP901 Dimensions in inches (millimeters) PP902 Dimensions in inches (millimeters)
8-5/8
(219)
80
100
5-3/4
(146)
60
40
120
20
140
160
0
psig
10
5
0
5-3/8
(135)
3-7/8
(100)
15
20
25
30
psig
9-5/8
(244)
PP902D Typical Operation PP902C Typical Operation
FROM
COMPRESSOR
FILTER
C5325
REDUCED
PRESSURE
IN
OUT
TO SYSTEM
PRV
C5543
668 customer.honeywell.com 70-6910
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