Brochure

51
Regulators
Air PRV Regulators
The Model Air PRV is designed to regulate air pressure
directly to Air Pressure Control Pilots.
Maximum Weight
Model Part Pressure Pressure (Approx.)
Number Number Ratio lbs. (bar) lbs. (kg)
AP-1A 400556 1 : 1 250 (17.3) 4 (1.8)
AP-4A 400557 4 : 1 250 (17.3) 5 (2.3)
Model AP-1A
Model AP-4A
Series AP Air Pressure Control Pilots
T h e Series AP Air Pressure pilot valves are designed for
applications such as injection molding, lab equipment, or
others that require frequent outlet pressure changes. The
required Air PRV Regulator allows remote adjustment of
the outlet steam pressure.
• Lightweight, compact size prevents strain on mounting
pipes
• Tight shut-off provided by hardened stainless steel pin
and seat
• Packless construction eliminates seals that wear out
and leak
• Travel stop and cover on diaphragm helps prevent over
pressurization damage
• Removable strainer helps prevent debris from
entering pilot
• No bias relay required
• Compatible with Pneumatic Temperature Pilots
• Maximum temperature 450°F (232°C)
• Maximum operating pressure 250 psig (17.3 bar)
Ordering Information
Air Pilots
Ordering Information
Air PRV Regulators
Air Loading Data
Materials of Construction
Part Specifications
Body Steel ASTM A108
Pin Stainless Steel ASTM A581
Seat Stainless Steel ASTM A582
Diaphragm Button Stainless Steel ASTM A582
Spring Stainless Steel ASTM A313
Strainer Stainless Steel ASTM A240
Diaphragm Beryllium Copper ASTM B194
Upper Diaphragm Stainless Steel ASTM A240
Gaskets Copper ASTM B152
Feedback
2"
(51mm)
Dia.
2"
(51mm)
5
3
⁄8"
(137mm)
Signal
Control Air
Inlet
Signal
Control Air
Feedback
Inlet
5
3
⁄16"
(132mm)
5
9
⁄16"
(141mm)
AIR LOADING PRESSURE
From Air PRV or Pneumatic Temp. Pilot psig (bar)
OUTLET STEAM PRESSURE psig (bar)
140 (9.7)
120 (8.3)
100 (6.9)
80 (5.5)
60 (4.1)
40 (2.8)
20 (1.4)
0
70 60 50 40 30 20 10
0
(4.8) (4.1) (3.5) (2.8) (2.1) (1.4)
(.7)
Weight
Model Part (Approx.)
Number Number lbs. (kg)
Air PRV (Regulator w/gauge) 402722 1 (.5)
1
/
4
"
NPT
1
/
4
"
NPT
1
5
/
8
"
(41mm)
3
5
/
8
"
(92mm)
2
9
/
16
"
(65mm)
Model
AP-1A
Air PRV Regulator
Note: Use an Air
PRV Regulator to
regulate pressure
to values shown
here.
Model
AP-4A
Hoffman Specialty
®
RegulatorsHoffman Specialty
®
Regulators