Pp903 Pneumatic Differential Pressuretrol - Honeywell Pneumatic Controls Engineering Manual

Pressure Controllers

PP903 Pneumatic Differential Pressuretrol

Dimensions in inches (millimeters)
8-5/8
(219)
9-11/16 (246)
Application Type: Differential Pressure
Connection Size: Input: 1/4 in. NPT; Branchline: 1/8 in. NPT
Approximate Throttling Range, Midscale (max.): 25 psi (172 kPa)
Product Number Action
PP903A1036 Reverse Acting, Direct Acting
40 customer.honeywell.com
One-pipe, pressure operated device used to provide proportional
control of pneumatic valve or damper actuators by varying the
pressure to the actuators in relation to the pressure difference
between two separate water pressures. Replacement devices are
available for Johnson, Powers, Robertshaw, and older Honeywell
pneumatic pressure controllers.
• Easily accessible adjustments.
• Direct Acting (DA) or Reverse Acting (RA) setting.
• Mounting lugs for quick mounting.
PP903A Typical Piping
M
3-5/16 (84)
M27078
Pressure Range: 0 to 300 psi (0 to 2068 kPa)
Mounting: Lugs for 3-point surface mounting
Maximum Safe
Actuator Force Operating Pressure
(psi) (kPa) (psi)
7.5 psi 52 kPa 18 psi
70-6925
RETURN
MAIN
PP903A
HAND
VALVE
GAGE
TEE
RESTRICTION
HEAT
EXCHANGER
PUMP
Differential Pressure Range
(kPa) (psi)
124 kPa 5 to 65 psi
SUPPLY
MAIN
HAND
VALVE
GAGE
TEE
N.O.
M5423
(kPa)
34 to 448 kPa