Pp901; Pp902 Pressure Reducing Valves; Pressure Reducing Valve - Honeywell Pneumatic Controls Engineering Manual

Pressure Controllers

PP901; PP902 Pressure Reducing Valves

Dimensions in inches (millimeters)
1- 1/ 2
( 38)
2-1/4
(57)
1/4 NPT
INLET
3-1/4 (83)
PP902D Typical Operation
TO AUTOMATIC OR
MANUAL SWITCHOVER
CONTROL
E X
FROM
COMPRESSOR
FILTER
38 customer.honeywell.com
1/8 NPT
SWITCHOVER
INLET PORT
(PP901B ONLY)
GAGE
CONNECTION
1/4 NPT
OUT LE T
EP RELAY
2 1
3
IN
OUT
REDUCED
PRESSURE
TO SYSTEM
PRV
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 sub-micron 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.
Dimensions in inches (millimeters)
4-7/8
(124)
5-3/4
(146)
C5146
PP902C Typical Operation
FROM
COMPRESSOR
FILTER
C5544
70-6925
5-3/8
(135)
8-5/8
(219)
3-7/8
(100)
15
80
60 100
10 20
40
120
5 25
20 140
160 30
0 0
psig psig
REDUCED
PRESSURE
TO SYSTEM
IN OUT
PRV
9-5/8
(244)
C5325
C5543