Pp904 Static Pressure Regulators; Pressure Regulator - Honeywell Pneumatic Controls Engineering Manual

PP904 Static Pressure Regulators

Dimensions in inches (millimeters)
9 (229)
8-1/4 (210)
PIGTAILS (PP904A ONLY)
PIGTAILS (PP904A ONLY)
8-1/8 (206)
Application Type: Static or Differential Pressure
Airflow Usage: 0.022 scfm (10.0 mL/s) at 18 psi (124 kPa)
Connections: Main: Sharp-barbed fittings for 1/4 in. diameter tubing;
Branch: Sharp-barbed fittings for 5/32 in. diameter tubing
Mainline Air Pressure (min.): 16 psi (112 kPa)
Mainline Air Pressure (max.): 25 psi (175 kPa)
Maximum Safe Static Pressure: 28 in. wc (7 kPa)
Maximum Safe Operating Pressure:
Product Number Action
PP904A1035 Reverse Acting,
Direct Acting
PP904B1009 Reverse Acting,
Direct Acting
A
FOUR
NO. 10
SCREWS
2-1/4
(57)
2-1/2 (63) MIN.
CLEARANCE
FOR COVER
REMOVAL
4-1/8
(105)
C3952
25 psi (170 kPa)
Setpoint Range
Number
of Pipes (in. wc)
2 0 to +/-8 in. wc
(adjustable)
1 0 to +/-8 in. wc
(adjustable)
70-6925
Pressure Controllers
One- or two-pipe, direct- or reverse-acting, low- or high-capacity
controller used with pneumatic actuators to regulate static or
differential pressure in central fan installations. Replacement
devices are available for Johnson, Powers, Robertshaw, Barber-
Colman, and older Honeywell devices.
• Adjustable setpoint and throttling range (Zero and span).
• Direct Acting (DA) and Reverse Acting (RA).
• Sharp-barb, push-on connectors for plastic tubing.
• Field calibration possible.
PP904A Typical Piping
NORMALLY
OPEN
DAMPER
AUCTATOR
A
C
B
M
PP904A
M
PP904B Typical Piping
PP904B
DUCT
NORMALLY
OPEN
DAMPER
LO HI
A
C
PNEUMATIC
AUCTATOR
RESTRICTOR
(FURNISHED)
Mounting: Duct mount
Temperature Range: 40 F to 120 F (5 C to 50 C)
Accessories:
14004238-001 Static Pressure Duct Head for 1/4 in., 6 mm diameter
Plastic Tubing
301298B Outdoor Static Pressure Head
Throttling Range
(kPa) (in. wc)
0 to +/-2 kPa 0.03 to 0.5 in wc
(adjustable) (adjustable)
0 to +/-2 kPa 0.06 to 0.5 in. wc
(adjustable) (adjustable)
DISCHARGE
AIR
STATIC
DUCT HEAD
TO REFERENCE
PRESSURE
M5561
DISCHARGE
AIR
PP904B
M
M5562
Comments
High capacity branchline
pressure
Low capacity branchline
pressure
41