Series LF, LX Solenoid Pilot Controlled Valves
Single Solenoid Pilot Controlled, Spring Assisted Air Return
2/2 Valves
2
1
Normally Closed (NC)
Port Sizes Valve Model Number* Avg.
1 2 NC NO CV
3/8 3/8 LF13NA37101W LF23NA37101W 3.6 3.12 (79.4) 1.88 (47.7) 4.81 (122.2) 5.45 (138.4) 1.5 (0.7)
1/2 1/2 LF14NA47101W LF24NA47101W 3.6 3.12 (79.4) 1.88 (47.7) 4.81 (122.2)
3/4 3/4 LF15NA57101W LF25NA57101W 12.2 4.12 (104.7) 2.50 (63.5) 6.96 (176.8) 7.30 (185.4) 3.5 (1.6)
1 1 LF16NA67101W LF26NA67101W 12.2 4.12 (104.7) 2.50 (63.5) 6.96 (176.8) 7.30 (185.4) 3.5 (1.6)
1¼ 1¼ LF17NA77101W LF27NA77101W 36.1 9.12 (231.7) 3.75 (95.3) 5.50 (139.7) 9.46 (240.3) 9.3 (4.2)
1½ 1½ LF18NA87101W LF28NA87101W 36.1 9.12 (231.7) 3.75 (95.3) 5.50 (139.7) 9.46 (240.3) 9.3 (4.2)
2 2 LF19NA97101W LF29NA97101W 64.7 10.72 (272.2) 5.00 (127.0) 7.50 (190.5) 10.99 (279.1) 19.3 (8.8)
2½ 2½ LF10NA07101W LF20NA07101W 64.7 10.72 (272.2) 5.00 (127.0) 7.50 (190.5) 10.99 (279.1) 19.3 (8.8)
* For models with external pilot supply, replace shaded “1” in the model number with a “5”, e.g., LF13NA37501Z.
For BSPP threads, replace “N” in the model number with a “D”, e.g., LF13DA37101W.
For 120 volts AC, 50/60 Hz, replace suffix “W” with “Z”, e.g., LF13NA37101Z.
Electrical connectors not included, see below for accessories.
Normally Open (NO)
2
1
Dimensions inches (mm) Weight
Length Width Height NC Height NO lb (kg)
5.45 (138.4) 1.5 (0.7)
STANDARD SPECIFICATIONS:
For Series LF, LX Solenoid Pilot Controlled Valves.
Pilot Solenoid: AC or DC power. Rated for continuous duty. Voltage
and hertz ratings shown on pilot housing.
Standard Voltages: 24 volts DC; 120 volts AC 50/60 Hz.
Power Consumption:
Port size 3/8” and 1/2” inlet: 9.8 VA on AC; 7.5 watts on DC.
½
Port size 3/4 thru 2
15 watts on DC.
Ambient Temperature: 40° to 120°F (4° to 50°C).
” inlet: 36 VA inrush, 23 VA holding on AC;
Media Temperature: 40° to 175°F (4° to 80°C).
Flow Media: Filtered air; 5 micron recommended.
Inlet Pressure: Vacuum to 145 psig (10 bar), (vacuum service
requires external pilot supply).
Pilot Pressure: 30 to 145 psig (2 to 10 bar). Must be equal to or
greater than inlet pressure. For vacuum service models requiring
external pilot supply, a pilot pressure of at least 30 psig (2 bar) is
required.
Port Threads: NPT, BSPP.
Note: For fluid applications, consult ROSS.
ELECTRICAL CONNECTORS: For Series LF, LX Solenoid Pilot Controlled Valves.
Part Numbers of Electrical Connectors
Valve Port Lighted Connector Only Lighted Connector Pre-wired*
Size 24 volts DC 110 Volts AC 24 volts DC 110 Volts AC
NC 3/8, 1/2 267K77W 267K77Z 382K77W 382K77Z
NO 3/8 - 1 267K77W 267K77Z 382K77W 382K77Z
NC 3/4 - 2½ 936K87W 936K87Z 720K77W 720K77Z
NO 1¼ - 2½ 936K87W 936K87Z 720K77W 720K77Z
*Pre-wired connectors are lighted and include a 2 meter (6½ ft.) cord.
IMPORTANT NOTE: Please read carefully and thoroughly all of the CAUTIONS on the inside back cover.
18 © 2010, ROSS CONTROLS®.
All Rights Reserved.
Series LF, LX Solenoid Pilot Controlled Valves
Valve Dimensions – inches (mm)
Port Sizes: 3/8 & 1/2
Port Sizes: 3/4 & 1
1.09
(27.7)
Port Sizes: 1¼ & 1½
0.72
(18.3)
1/8-27 NPT
X-1
(104.3)
Pilot Port
1/8-27 NPT
3/8 & 1/2 3/4 & 1 1¼ & 1½ 2 & 2½
Pilot Port
1/8-27 NPT
X-1
Pilot Port
4.11
2.94
(74.7)
6.96
(176.8)
(125.4)
4.94
4.81
(122.2)
3.38
(85.7)
FLOW
FLOW
1.09
(27.7)
0.72
(18.3)
Speed
Control
Speed
Control
4.45
(113.0)
3.06
(77.7)
(63.5)
2.50
1.88
(47.7)
4.12 (104.7)
3.12 (79.4)
1.88
(47.7)
2.50
(63.5)
Speed
Control
Speed
Control
6.52
(165.6)
5.00
(127.0)
3.75
(95.3)
5.50 (139.7)
3.75
(95.3)
7.50 (190.5)
5.00 (127.0)
Port Sizes: 2 & 2½
1.88
(47.7)
1.50
(38.1)
X-1
X-1
Pilot Port
1/8-27 NPT
7.84
(199.2)
10.72
(272.2)
6.25
(158.8)
8.63
(219.2)
(180.3)
9.12
(231.7)
7.10
FLOW
FLOW
8.05
(204.3)
1.88
(47.7)
1.50
(38.1)
www.rosscontrols.com 19
Series LX Pressure Controlled Valves
Pilot Port
2/2 Valves
Normally Closed (NC)
Port Sizes Valve Model Number* Avg.
1 2 NC C
3/8 3/8 LX13NA35501 3.6 3.83 (97.3) 2.83 (71.9) 2.85 (72.4) 1.4 (0.6)
1/2 1/2 LX14NA45501 3.6 3.83 (97.3) 2.83 (71.9) 2.85 (72.4) 1.4 (0.6)
3/4 3/4 LX15NA55501 12.2 4.16 (105.7) 3.45 (87.6) 5.63 (143.0) 3.5 (1.6)
1 1 LX16NA65501 12.2 4.16 (105.7) 3.45 (87.6) 5.63 (143.0) 3.5 (1.6)
1
¼
1¼ LX17NA75501 36.1 5.37 (136.6) 5.00 (127.0) 8.52 (216.4) 10.0 (4.6)
1
½
1½ LX18NA85501 36.1 5.37 (136.6) 5.00 (127.0) 8.52 (216.4) 10.0 (4.6)
2 2 LX19NA95501 64.7 6.35 (161.3) 6.75 (171.5) 10.40 (264.1) 19.5 (8.9)
2
½
2½ LX10NA05501 64.7 6.35 (161.3) 6.75 (171.5) 10.40 (264.1) 19.5 (8.9)
* For BSPP threads, replace “N” in the model number with a “D”, e.g., LX13DA35501.
STANDARD SPECIFICATIONS:
For Series LX Pressure Controlled Valves.
Ambient Temperature: 40° to 120°F (4° to 50°C).
Media Temperature: 40° to 175°F (4° to 80°C).
Flow Media: Filtered air; 5 micron recommended.
Inlet Pressure: Vacuum to 250 psig (17 bar).
2
1
Dimensions inches (mm) Weight
V
Length Width Height lb (kg)
Pilot Pressure: 30 to 145 psig (2 to 10 bar). Must be equal to or
greater than inlet pressure. For vacuum service models requiring
external pilot supply, a pilot pressure of at least 30 psig (2 bar) is
required.
Port Threads: NPT, BSPP.
Note: For fluid applications, consult ROSS.
IMPORTANT NOTE: Please read carefully and thoroughly all of the CAUTIONS on the inside back cover.
Valve Dimensions – inches (mm)
Port Sizes: 3/8 & 1/2
Port Sizes: 3/4 & 1
1.09
(27.7)
0.72
(18.3)
3/8 & 1/2 3/4 & 1 1¼ & 1½ 2 & 2½
1/8-27 NPT
X-1
X-1
Pilot Port
1/8-27 NPT
4.11
(104.3)
2.94
(74.7)
5.31
(134.9)
(125.4)
4.94
3.75
(95.3)
3.38
(85.7)
FLOW
FLOW
1.09
(27.7)
0.72
(18.3)
Speed
Control
Speed
Control
4.45
(113.0)
3.06
(77.7)
2.50
(63.5)
1.88
(47.7)
3.12 (79.4)
1.88
(47.7)
4.12 (104.7)
2.50
(63.5)
20 © 2010, ROSS CONTROLS®.
All Rights Reserved.
Pilot Port
Pilot Port
Series LX Pressure Controlled Valves
Pressure Control Signal
Valve Dimensions – inches (mm)
Port Sizes: 1¼ & 1½
1/8-27 NPT
Port Sizes: 2 & 2½
1/8-27 NPT
X-1
7.84
(199.2)
1.88
(47.7)
X-1
(219.2)
9.07
(230.3)
8.63
(158.8)
1.50
(38.1)
6.25
(180.3)
7.47
(189.8)
FLOW
7.10
FLOW
8.05
(204.3)
1.88
(47.7)
1.50
(38.1)
Speed
Control
Speed
Control
6.52
(165.6)
5.00
(127.0)
3.75
(95.3)
5.50 (139.7)
3.75 (95.3)
7.50 (190.5)
5.00 (127.0)
Additional Valve Information
Note: The Dale series pressure controlled valves require both an
external pilot supply and a control signal to operate the valve. When a
pressure control signal is applied the valve shifts to the open position.
The LF & LX Advantage
The LF & LX Series provides superior performance
over a diaphragm valve with a rugged poppet
design, bi-directional flow and high cycle life.
Diaphragm
Valve
Improved
Performance
X-1
External Pilot Supply
The LF & LX Series provides superior
performance over a ball valve with solenoid
actuation, shifting speed, cycle life, and most
important, a cost effective alternative.
Cost
Effective
Ball
Valve
www.rosscontrols.com 21
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