Ross Controls RIGHT ANGLE - Manual (Page 12)

12 © 2012, ROSS CONTROLS. All Rights Reserved.
Series 27 EEZ-ON ® Valves
Gradual Start-up plus Pressure Controlled and Line Exhaust
PILOT NOT ENERGIZED
Pilot air is blocked by the pilot. Any
downstream pressure forces piston B
(which slides on the valve stem) upward.
This opens the exhaust port and vents the
downstream line.
PILOT ENERGIZED
Pilot air forces piston B downward to close
the exhaust port. Pilot air also flows past the
adjusting needle, opens the ball check and
begins slowly to pressurize the outlet line.
At the same time, pressure is building up on
piston A.
PILOT DE-ENERGIZED
Air above pistons A and B is exhausted
through the exhaust port of the pilot valve.
Air above poppet C forces sliding piston
B upward so that the main exhaust port is
opened and the pressurized air is exhausted.
FULL PRESSURE
When the pressure on piston A reaches
approximately 50 percent of inlet pressure, it
is forced downward and opens inlet poppet
C. Full inlet pressure now flows freely to the
outlet port.
The 3/2 EEZ-ON ® valve provides the same gradual pressure buildup
as the 2/2 EEZ-ON ® valves described on page 11.
In addition, the 3/2 valve has an exhaust port so that downstream
air is exhausted when the valve is de-energized.
Internal
Pressure Controlled Solenoid
Pilot Controlled
VALVE OPERATION
1
2
C
A
3
PILOT
VALVE
B
1
2
C
A
PILOT
VALVE
B
1
2
C
A
PILOT
VALVE
B
1
2
C
A
3
PILOT
VALVE
B
For coordinating silencers, see page 18 (model numbers 5500A4003, 5500A6003, and 5500A8001).
3/2 EEZ-ON ® Valves
Port Size Valve Model Avg. Cv Dimensions inches (mm) Weight
In-Out Exh. Number* 1 to 2 2 to 3 A B C lb (kg)
Solenoid Pilot Controlled
1/4 1/2 2773B2037 2.5 3.1 4.1 (105) 8.8 (224) 3.1 (79) 4.5 (2.0)
3/8 1/2 2773B3037 3.6 5.3 4.1 (105) 8.8 (224) 3.1 (79) 4.5 (2.0)
1/2 1/2 2773B4047 3.3 5.3 4.1 (105) 8.8 (224) 3.1 (79) 4.5 (2.0)
1/2 1 2773B4037 10.0 13.0 4.9 (124) 9.6 (243) 3.6 (92) 5.0 (2.3)
3/4 1 2773B5037 12.0 15.0 4.9 (124) 9.6 (243) 3.6 (92) 5.0 (2.3)
1 1 2773B6047 12.0 16.0 4.9 (124) 9.6 (243) 3.6 (92) 5.0 (2.3)
1 11/2 2773B6037 23.0 34.0 6.6 (168) 10.6 (268) 4.8 (123) 8.8 (4.0)
11/4 11/2 2773B7037 30.0 32.0 6.6 (168) 10.6 (268) 4.8 (123) 8.8 (4.0)
11/2 11/2 2773B8047 30.0 31.0 6.6 (168) 10.6 (268) 4.8 (123) 8.8 (4.0)
Internal Pressure Controlled
1/4 1/2 2783C2037 2.5 3.1 4.1 (105) 5.7 (146) 3.1 (79) 4.5 (2.0)
3/8 1/2 2783C3037 3.6 5.3 4.1 (105) 5.7 (146) 3.1 (79) 4.5 (2.0)
1/2 1/2 2783C4047 3.3 5.3 4.1 (105) 5.7 (146) 3.1 (79) 4.5 (2.0)
1/2 1 2783C4037 10.0 13.0 4.9 (124) 7.1 (180) 3.6 (92) 5.0 (2.3)
3/4 1 2783C5037 12.0 15.0 4.9 (124) 7.1 (180) 3.6 (92) 5.0 (2.3)
1 1 2783C6047 12.0 16.0 4.9 (124) 7.1 (180) 3.6 (92) 5.0 (2.3)
1 11/2 2783B6037 23.0 34.0 6.6 (168) 7.4 (188) 4.8 (123) 8.8 (4.0)
11/4 11/2 2783B7037 30.0 32.0 6.6 (168) 7.4 (188) 4.8 (123) 8.8 (4.0)
11/2 11/2 2783B8047 30.0 31.0 6.6 (168) 7.4 (188) 4.8 (123) 8.8 (4.0)
C
A
B
C
B
A
Adjusting
Needle
1
3
2
Internal
Pressure
Controlled
Solenoid
Pilot
Controlled
1
3
2
Y3
STANDARD SPECIFICATIONS: For valves on this page.
Ambient/Media Temperature: 40° to 175°F (4° to 80°C).
Power Consumption: 87 VA holding on 50 or 60 Hz;
14 watts on DC.
Flow Media: Filtered air; 5 micron recommended.
Inlet Pressure: 15 to 150 psig (1.0 to 10.3 bar).
*Body Paint: Gold.
*Port Threads: NPT standard, BSPP. For BSPP threads, add a
“D” prefix to the model number, e.g., D2773B2037.
The 3/2 EEZ-ON ® valve provides the same gradual pressure buildup as the 2/2 EEZ-ON ® valves described above. In addition, the 3/2
valve has an exhaust port so that downstream air is exhausted when the valve is de-energized. At the same time, supply air is positively
shut off so that a separate shut-off valve is not required.
NOTE: The 3/2 EEZ-ON
® valve is also available with a L-O-X ® adapter so that both L-O-X ® and EEZ-ON ® functions are consolidated in
a single valve.