Ross Controls LOW TEMPERATURE SERIES 21 - Manual (Page 4)

12 © 2009, ROSS CONTROLS ® . All Rights Reserved.
C
A
B
Normally Closed (NC)
STANDARD SPECIFICATIONS: For valves on this page.
Solenoids: Rated for continuous duty.
Standard voltages: 100-110 volts 50 Hz; 100-120 volts 60 Hz; 24,
110 volts DC.
Power Consumption: 87 VA inrush, 30 VA holding on 50 or 60 Hz;
14 Watts on DC.
Ambient Temperature: -40° to 120° F (-40° to 50° C). (For low
temperature valves; High temperature valves also available.)
Media Temperature: -40° to 175° F (-40° to 80° C).
Flow Media: Vacuum and/or filtered-compressed air.
Pressure: Vacuum to 150 psig.
*External Pilot Pressure: Equal or higher than inlet pressure, but
not less than 30 psig.
EPS* 1 (PUMP)
2 (WORK)
Piping 2/2 Normally Closed or Normally Open Valves
Pipe the unit into the system by connecting the vacuum source or pump to the normal air pressure
inlet port (port 1). The normal outlet port is the work port (port 2).
Note: 2/2 vacuum valves provide only on/off control and do not have an exhaust function.
Normally Open (NO)
Piping 3/2 Normally Closed Valves
In this valve configuration, pipe the unit into the system by connecting the vacuum source or pump to the
normal air pressure inlet port (port 1). The normal outlet port is the work port (port 2), and the normal air
pressure exhaust port becomes the atmosphere port (port 3).
Piping 3/2 Normally Open Valves
To obtain a 3/2 normally open ROSS vacuum valve, simply pipe the 3/2 normally closed body slightly
differently. Connect the vacuum source or pump to port 3, the normal exhaust. Leave port 1 open to
atmosphere, and the normal outlet remains as the work port (port 2).
Series 21 Solenoid Pilot Controlled Vacuum Valves
2/2 Valves
EPS* 1 (PUMP)
2 (WORK)
Port Valve Model Avg. Function Dimensions inches (mm) Weight
Size Number Cv A B C lb (kg)
1/4 2171B2901 2.1 NC 3.6 (91) 3.0 (76) 7.0 (178) 3.0 (1.4)
1/4 2171B2908 2.1 NC 3.6 (91) 3.0 (76) 7.0 (178) 3.0 (1.4)
3/8 2171B3906 2.6 NC 3.6 (91) 3.0 (76) 7.0 (178) 3.0 (1.4)
3/4 2171B5905 7.8 NC 4.6 (117) 3.0 (76) 7.7 (196) 3.3 (1.5)
1 2171B6904 8.3 NC 4.6 (117) 3.0 (76) 7.7 (196) 3.3 (1.5)
1 2171B6916 20 NC 6.6 (168) 4.1 104) 10.5 (266) 7.5 (3.4)
11/4 2171B7901 30 NC 6.6 (168) 4.1 104) 10.5 (266) 7.5 (3.4)
11/2 2171B8906 31 NC 6.6 (168) 4.1 (104) 10.5 (266) 7.5 (3.4)
11/2 2172B8900 21 NO 6.6 (168) 4.1 (104) 10.5 (266) 7.5 (3.4)
2 2171A9900 57 NC 8.7 (219) 5.2 (131) 11.8 (300) 15.5 (6.9)
2 2172B9901 57 NO 8.7 (219) 5.2 (131) 11.8 (300) 15.5 (6.9)
21/2 2171B9901 64 NC 8.7 (219) 5.2 (131) 11.8 (300) 15.5 (6.9)
C
A
B
3/2 Valves
EPS*
1 (PUMP)
2 (WORK)
3
(ATM.)
EPS*
1 (ATM.)
2 (WORK)
3
(PUMP)
Normally Closed (NC)
Normally Open (NO)
Port Size Valve Model Avg. Cv Function Dimensions inches (mm) Weight
In-Out Exh. Number In-Out Out-Exh. A B C lb (kg)
1/4 1/2 2173B2900 2.4 3.4 NC 3.6 (90) 3.6 (90) 7.3 (186) 3.0 (1.4)
3/8 1/2 2173B3900 3.0 5.8 NC 3.6 (90) 3.6 (90) 7.3 (186) 3.0 (1.4)
3/8 1/2 2174B3900 3.0 5.8 NC 3.6 (90) 3.6 (90) 7.3 (186) 3.0 (1.4)
3/8 1/2 2173B3908 3.0 5.8 NO 3.6 (90) 3.6 (90) 7.3 (186) 3.0 (1.4)
1/2 1/2 2173B4901 3.0 5.2 NC 3.6 (90) 3.6 (90) 7.3 (186) 3.0 (1.4)
1/2 1 2173B4902 6.6 12 NC 4.6 (116) 4.6 (117) 8.0 (203) 3.3 (1.5)
1/2 1 2174A4912 6.5 7.0 NC 4.6 (116) 4.6 (117) 8.0 (203) 3.3 (1.5)
3/4 1 2173B5900 7.8 13 NC 4.6 (116) 4.6 (117) 8.0 (203) 3.3 (1.5)
3/4 1 2173B5903 7.5 7.5 NC 4.6 (116) 4.6 (117) 8.0 (203) 3.3 (1.5)
1 1 2173B6901 7.5 12 NC 4.6 (116) 4.6 (117) 8.0 (203) 3.3 (1.5)
1 11/2 2173B6902 24 40 NC 6.6 (168) 6.6 (168) 10.5 (266) 7.5 (3.4)
1 11/2 2174A6914 15 17 NO 6.6 (168) 6.6 (168) 10.5 (266) 7.5 (3.4)
11/4 11/2 2173B7901 29 39 NC 6.6 (168) 6.6 (168) 10.5 (266) 7.5 (3.4)
11/4 11/2 2173B7917 29 39 NO 6.6 (168) 6.6 (168) 10.5 (266) 7.5 (3.4)
11/2 11/2 2173A8911 30 38 NC 6.6 (168) 6.6 (168) 10.5 (266) 7.5 (3.4)
11/2 21/2 2173A8915 68 70 NC 8.7 (219) 6.4 (161) 12.4 (313) 16.5 (7.4)
2 21/2 2173A9905 70 70 NC 8.7 (219) 6.4 (161) 12.4 (313) 16.5 (7.4)
21/2 21/2 2173A9906 70 71 NC 8.7 (219) 6.4 (161) 12.4 (313) 16.5 (7.4)
IMPORTANT NOTE: Please read carefully and thoroughly all of the CAUTIONS on the inside back cover.