Y600A Series
2
Body Sizes (Inlet x Outlet) and End 
Connection Style
(1)
3/4 x 3/4 or 1 x 1-inch NPT
Maximum Inlet Pressure (Body Rating)
(2)
150 psig (10,3 bar)    
Maximum Outlet Pressure (Casing)
(2)
20 psig (1,38 bar)     
Maximum Operating Inlet Pressure
See Table 2
Maximum Operating Outlet Pressure to Avoid Internal 
Parts Damage
(2)
2 psig (0,14 bar) above outlet pressure setting
Specications
Outlet Pressure Ranges
(2)
See Table 1
Flow Coecients
See Table 2
Temperature Capabilities
(2)
–20° to 180°F (–29° to 82°C)
Spring Case Vent Connection
1/4-inch NPT
Diaphragm Case Connection
1/2-inch NPT
Approximate Weight
13 pounds (5,9 kg)
  1.  End connections for other than U.S. standards can usually be provided; consult your local Sales Ofce.
  2.  The pressure/temperature limits in this instruction manual and any applicable standard or code limitation should not be exceeded.
Table 1.  Outlet (Control) Pressure Ranges
TYPE 
 NUMBER
SPRING 
COLOR
SPRING PART 
NUMBER
OUTLET PRESSURE RANGE WITH  
SPRING CASE ABOVE DIAPHRAGM
(1)
APPROXIMATE POINT ABOVE PRESSURE 
SETTING AT WHICH THE TYPE Y600AR 
INTERNAL RELIEF STARTS TO DISCHARGE
Y600A, 
Y600AM, 
Y600AR
Red 1B653827052 4 to 8-inches w.c.  (10 to 20 mbar) 10 to 24-inches w.c.  (25 to 60 mbar)
Olive drab 1B653927022 7 to 16-inches w.c.  (17 to 40 mbar)
10 to 26-inches w.c. (25 to 65 mbar)
Yellow 1B537027052 15-inches w.c. to 1.2 psig (37 to 83 mbar)
Light green 1B537127022 1.2 to 2.5 psig   (0,08 to 0,17 bar) 0.5 to 2 psig (0,03 to 0,14 bar)
Light blue 1B537227022 2.5 to 4.5 psig   (0,17 to 0,31 bar) 0.5 to 3 psig (0,03 to 0,21 bar)
Black 1B537327052 4.5 to 7 psig  (0,31 to 0,48 bar) 1 to 4 psig (0,07 to 0,28 bar)
1.  Minimum outlet pressure setting may be approximately 1-inch w.c. (2 mbar) lower if spring case is below diaphragm.
Note
If the regulator is shipped mounted on 
another unit, install that unit according to 
the appropriate instruction manual.
  1.  Only personnel qualied through training and      
       experience should install, operate, and maintain a  
       regulator.  For a regulator that is shipped separately,  
       make sure  that there is no damage to, or foreign  
       material in the regulator.  Also ensure that all tubing  
       and piping are free of debris.
Table 2.  Maximum Operating Inlet Pressures
ORIFICE SIZE,
INCHES (mm)
MAXIMUM OPERATING INLET PRESSURE, PSIG (bar)
WIDE-OPEN FLOW COEFFICIENTS 
FOR EXTERNAL RELIEF SIZING
With 1.2 PSIG 
(0,08 bar) or Less 
Outlet Pressure 
Setting
With 1.2 to 2.5 PSIG 
(0,08 to 0,17 bar) 
Outlet Pressure 
Setting
With 2.5 to 4.5 PSIG 
(0,17 to 0,31 bar) 
Outlet Pressure 
Setting
With 4.5 to 7 PSIG 
(0,31 to 0,48 bar) 
Outlet Pressure 
Setting
C
g 
C
v
C
1
1/8   (3,17) 150   (10,3) 150   (10,3) 150   (10,3) 150   (10,3) 12.3 0.35 35
3/16   (4,76) 150   (10,3) 150   (10,3) 150   (10,3) 150   (10,3) 27.6 0.79 35
1/4   (6,35) 75   (5,17) 150   (10,3) 150   (10,3) 150   (10,3) 50 1.43 35
3/8   (9,53) 35   (2,41) 60   (4,14) 60   (4,14) 60   (4,14) 110 3.14 35
1/2   (12,7) 8  (0,55) 10   (0,69) 12   (0,83) 12   (0,83) 200 5.71 35
9/16   (14,3) 5 (0,34) 6   (0,41) 8  (0,55) 8   (0,55) 250 7.14 35