Series 21 pressure controlled vacuum valves, 2/2 valves 3/2 valves – Ross Controls LOW TEMPERATURE SERIES 21 User Manual
Page 5
www.rosscontrols.com
13
Piping 2/2 Normally Closed 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.
2/2 Valves
3/2 Valves
2 (WORK)
1 (PUMP)
2 (WORK)
1 (PUMP)
Normally Closed (NC)
Normally Open (NO)
Port Valve Model
Avg. Function
Dimensions inches (mm)
Weight
Size
Number
Cv
A
B
C
lb (kg)
1/4
2151A2901
2.1
NC
3.6 (90)
3.7 (94)
3.0 (94)
1.8 (0.8)
1/2
2151B4904
6.9
NC
4.6 (116)
4.4 (112)
3.0 (94)
4.5 (2.0)
1/2
2151A4910
3.0
NC
3.6 (90)
3.7 (94)
3.0 (94)
1.8 (0.8)
3/4
2151A5913
7.8
NC
4.6 (116)
4.4 (112)
3.0 (94)
4.5 (2.0)
3/4
2151A5914
7.8
NC
4.6 (116)
4.4 (112)
3.0 (94)
4.5 (2.0)
3/4
2152A5901
7.0
NO
4.6 (116)
4.4 (112)
3.0 (94)
4.5 (2.0)
1
2151B6900
8.3
NC
4.6 (116)
4.4 (112)
3.0 (94)
4.5 (2.0)
11/4
2151A7909
30
NC
6.6 (168)
7.5 (190)
4.1 (104) 11.0 (5.0)
11/2
2151B8900
31
NC
6.6 (168)
7.5 (190)
4.1 (104) 11.0 (5.0)
11/2
2152B7900
23
NO
6.6 (168)
7.5 (190)
4.1 (104) 11.0 (5.0)
B
A
C
B
A
C
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).
STANDARD SPECIFICATIONS: For valves on this page.
Media Temperature: -40° to 175° F (-40° to 80° C).
Flow Media: Vacuum and/or filtered-compressed air.
Pressure: Vacuum to 150 psig.
Signal Pressure: Equal or higher than inlet pressure, but not less
than 30 psig.
Normally Closed (NC)
Normally Open (NO)
1 (PUMP)
2 (WORK)
3
(ATM.)
1 (PUMP)
2 (WORK)
3
(ATM.)
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 2153B2900
2.4
3.4
NC
3.6 (90)
4.0 (101)
3.1 (79)
1.8 (0.8)
1/2
1/2 2153B4903
3.0
5.2
NC
3.6 (90)
4.0 (101)
3.1 (79)
1.8 (0.8)
3/4
1
2153B5903
7.8
13
NC
4.6 (116) 4.4 (112)
3.0 (94)
4.5 (2.0)
1
11/2 2153C6905
24
40
NC
6.6 (168) 7.5 (190)
4.8 (123) 11.0 (5.0)
1
1
2153A6906
7.4
12
NO
4.6 (116) 4.4 (112)
3.0 (94)
4.5 (2.0)
11/4
11/2 2153A7906
29
39
NC
6.6 (168) 7.5 (190)
4.8 (123) 11.0 (5.0)
11/2
11/2 2153B8900
30
38
NC
6.6 (168) 7.5 (190)
4.8 (123) 11.0 (5.0)
21/2
21/2 2153A9902
70
71
NC
8.7 (219) 6.4 (161)
9.5 (241) 15.3 (6.9)
2
21/2 2154A9900
58
61
NC
8.7 (219) 6.4 (161)
9.5 (241) 15.3 (6.9)
STANDARD SPECIFICATIONS: For full vacuum valves on
page 14.
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.
IMPORTANT NOTE: Please read carefully and thoroughly all of the CAUTIONS on the inside back cover.
Series 21 Pressure Controlled Vacuum Valves