Process Valves for Air, Water, Liquids, and Steam
Cost-Effective Components for Reliable Flow and Pressure Control
STC Valve products help machine builders, maintenance teams, and manufacturers control air, water, gas, and compatible fluids without overcomplicating system design or replacement decisions. The product range supports common needs such as dependable valve operation, secure connections, stable pressure, and compact installation.
Through All Air Inc., customers can access STC solenoid valves, air valves, process valves, stainless steel fittings, push-in fittings, and pressure regulators for new equipment, system upgrades, and everyday maintenance requirements.
Ideal for applications that require:
- Reliable on-off and directional flow control
- Stable air pressure regulation
- Fast, secure pneumatic connections
- Corrosion-resistant stainless steel fittings
- Cost-effective replacement components
- Products for industrial automation and process equipment
Explore STC Valves, Fittings, and Air Control Products
Process Valves
2P025 1/8 – 1/8″NPT, 2P025 1/4 – 1/4″NPT 2 Way Normally Closed Direct Acting Process Valve
Voltage:
1 =12VDC
2 =24VDC2A =24VAC
3 =110VAC
4 =220VAC
Electrical Connection:
G = GrommetElectrical Connection:
D = DIN (with LED)
Cv/Orifice:
Cv = 0.23, Orifice = 2.5mm
Services: Air, Water, Liquid
Body: Nylon Plastic
Operating Temperature: 14 to 122°F
Operating Pressure: Vacuum to 115PSI
Coil Power: 3 to 6.5W
Response Time: <20msec
22SCFM at 100PSI
2P025 1/8S – 1/8″NPT, 2P025 1/4S – 1/4″NPT 2 Way Normally Closed Direct Acting Process Valve
2P025 1/8A – 1/8″NPT, 2P025 1/4A – 1/4″NPT 2 Way Normally Closed Direct Acting Process Valve
Voltage:
1 =12VDC
2 =24VDC
2A =24VAC
3 =110VAC
4 =220VAC
E or ATEX=Explosion Proof Coil
Electrical Connection:
G = GrommetElectrical Connection:
D = DIN (with LED)
Cv/Orifice:
Cv = 0.23, Orifice = 2.5mm
Services: Air, Water, Liquid
Body: Acetal Plastic
Operating Temperature: 14 to 176°F
Operating Pressure: Vacuum to 115PSI
Coil Power: 3 to 6.5W
Response Time: <20msec
22SCFM at 100PSI
Wetted Surfaces: Acetal, Stainless Steel
2P050 1/4 – 1/4″ Female NPT, 2P050 3/8 – 3/8″ Female NPT, 2P050 3/8F – 3/6″ Push-In Fitting 2-Way, Normally Closed Direct Acting Process Valve
Voltage:
1 =12VDC
2 =24VDC
2A =24VAC
3 =110VAC
4 =220VAC
ATEX=Explosion Proof Coil
Electrical Connection:
G = GrommetElectrical Connection:
D = DIN (with LED)
Cv/Orifice:
Orifice = 5mm
Services: Air, Water, Liquid
Body: Delrin Plastic (customizable to any plastic)
Operating Temperature: 32 to 122°F
Operating Pressure: Vacuum to 50PSI
Coil Power: 20W
Wetted Surfaces: Delrin, Stainless Steel, NBR, FKM O-Ring
2V025-1/8 – 1/8″NPT, 2V025 1/4 – 1/4″NPT 2-Way, Normally Closed Direct Acting Process Valve
2T060-1/4 – 1/4″NPT, 2T060-3/8 – 3/8″NPT, 2T060-1/2 – 1/2″NPT 2-Way, Normally Closed Direct Acting Process Valve
2S012-1/8A – 1/8″NPT, 2S012-1/4A – 1/4″NPT 2-Way, Normally Closed Direct Acting Process Valve
2S020-1/8A – 1/8″NPT, 2S020-1/4A – 1/4″NPT 2-Way, Normally Closed Direct Acting Process Valve
3S012-1/8A – 1/8″NPT, 3S012-1/4A – 1/4″NPT 3-Way Universal Direct Acting Process Valve
2S025-1/8H – 1/8″NPT, 2S025-1/4H – 1/4″NPT 2-Way, Normally Closed Direct Acting Process Valve
2W025-1/4H – 1/4″NPT 2-Way, Normally Closed Direct Acting Process Valve
2S025-1/4 – 1/4″NPT, 2S035-1/4 – 1/4″NPT, 2S040-3/8 – 3/8″NPT, 2S050-1/4-V – 1/4″NPT, 2S050-3/8 – 3/8″NPT 2-Way, Normally Closed Direct Acting Process Valve
2W025-1/4 – 1/4″NPT, 2W035-1/4 – 1/4″NPT, 2W040-3/8 – 3/8″NPT 2-Way, Normally Closed Direct Acting Process Valve
2H012-1/8 – 1/8″NPT, 2H016-1/4 – 1/4”NPT 2-Way, Normally Closed Direct Acting Process Valve
3S020-1/4 – 1/4″NPT, 3S035-1/4 – 1/4″NPT 3-Way Normally Closed or Open Direct Acting Process Valve
2SO030-1/4 – 1/4″ NPT, 2SO040-3/8 – 3/8″ NPT 2-Way, Normally Open Direct Acting Process Valve
2WO040-3/8 – 3/8″ NPT 2-Way, Normally Open Direct Acting Process Valve
2V130-3/8 – 3/8″ NPT, 2V130-1/2 – 1/2″ NPT, 2V250-3/4 – 3/4″ NPT, 2V250-1 – 1″ NPT 2-Way, Normally Closed Pilot Operated Diaphragm Process Valve
2S160-3/8 – 3/8″ NPT, 2S160-1/2 – 1/2″ NPT, 2S200-3/4 – 3/4″ NPT, 2S250-1 – 1″ NPT, 2S350-1 1/4 – 1-1/4″ NPT, 2S400-1 1/2 – 1-1/2″ NPT, 2S500-2 – 2″ NPT 2-Way, Normally Closed Direct Lift Diaphragm Process Valve
2W160-3/8 – 3/8″ NPT, 2W160-1/2 – 1/2″ NPT, 2W200-3/4 – 3/4″ NPT, 2W250-1 – 1″ NPT, 2W350-1 1/4 – 1-1/4″ NPT, 2W400-1 1/2 – 1-1/2″ NPT, 2W500-2 – 2″ NPT 2-Way, Normally Closed Direct Lift Diaphragm Process Valve
2SO160-3/8 – 3/8″ NPT, 2SO160-1/2 – 1/2″ NPT, 2SO200-3/4 – 3/4″ NPT, 2SO250-1 – 1″ NPT, 2SO350-11/4 – 1 1/4″ NPT, 2SO400-1 1/2 – 1 1/2″ NPT, 2SO500-2 – 2″ NPT 2-Way, Normally Open Direct Lift Diaphragm Process Valves
2WO160-3/8 – 3/8″ NPT, 2WO160-1/2 – 1/2″ NPT, 2WO200-3/4 – 3/4″ NPT, 2WO250-1 – 1″ NPT, 2WO350-1 1/4 – 1 1/4″ NPT, 2WO400-1 1/2 – 1 1/2″ NPT, 2WO500-2 – 2″ NPT 2-Way, Normally Open Direct Lift Diaphragm Process Valve
2L170-1/2 – 1/2″ NPT, 2L170-3/4 – 3/4″ NPT, 2L200-1 – 1″ NPT, 2L300-1 1/2 – 1 1/2″ NPT, 2L500-2 – 2″ NPT 2-Way, Normally Closed Pilot Piston Process Valve
2LS150-3/8 – 3/8″ NPT, 2LS150-1/2 – 1/2″ NPT, 2LS200-3/4 – 3/4″ NPT, 2LS250-1 – 1″ NPT, 2LS320-11/4 – 1 1/4″ NPT, 2LS400-11/2 – 1 1/2″ NPT, 2LS500-2 – 2″ NPT 2-Way, Normally Closed Semi-Direct Lift Piston Process Valve
2P160-1/2 – 1/2″ NPT, 2P200-3/4 – 3/4″ NPT, 2P250-1 – 1″ NPT 2-Way, Normally Closed Direct Lift Diaphragm Process Valve
2PO160-1/2 – 1/2″ NPT, 2PO200-3/4 – 3/4″ NPT, 2PO250-1 – 1″ NPT 2-Way, Normally Open Direct Lift Diaphragm Process Valve
2MS120-3/8 – 3/8″ NPT, 2MS150-1/2 – 1/2″ NPT, 2MS200-3/4 – 3/4″ NPT, 2MS250-1 – 1″ NPT, 2MS320-1 1/4 – 1 1/4″ NPT, 2MS400-1 1/2 – 1 1/2″ NPT, 2MS500-2 – 2″ NPT 2-Way, Normally Closed Pilot Piston Process Valve
2MSO120-3/8 – 3/8″ NPT, 2MSO150-1/2 – 1/2″ NPT, 2MSO200-3/4 – 3/4″ NPT, 2MSO250-1 – 1″ NPT, 2MSO320-1 1/4 – 1 1/4″ NPT, 2MSO400-1 1/2 – 1 1/2″ NPT, 2MSO500-2 – 2″ NPT 2-Way, Normally Open Pilot Piston Process Valve
2E100-3/8 – 3/8″ NPT, 2E150-1/2 – 1/2″ NPT, 2E200-3/4 – 3/4″ NPT, 2E250-1 – 1″ NPT 2-Way, Normally Closed Pilot Piston Process Valve
2D150-3/8 – 3/8″ NPT, 2D150-1/2 – 1/2″ NPT, 2D200-3/4 – 3/4″ NPT, 2D250-1 – 1″ NPT, 2D320-11/4 – 1 1/4″ NPT, 2D400-11/2 – 1 1/2″ NPT, 2D500-2 – 2″ NPT 2-Way, Slow Closing Pilot Diaphragm Normally Closed Process Valve
2DS150-3/8 – 3/8″ NPT, 2DS150-1/2 – 1/2″ NPT, 2DS200-3/4 – 3/4″ NPT, 2DS250-1 – 1″ NPT, 2DS320-11/4 – 1 1/4″ NPT, 2DS400-11/2 – 1 1/2″ NPT, 2DS500-2 – 2″ NPT 2-Way, Slow Closing Pilot Diaphragm Normally Closed Process Valve
2DS500-2F – 2″ Flange, 2DS650-2 1/2F – 2 1/2″ Flange, 2DS800-3F – 3″ Flange, 2DS1000-4F – 4″ Flange, 2DS1500-6F – 6″ Flange 2-Way, Normally Closed Pilot Piston Process Valve
2DSO500F – 2″ Flange, 2DSO650F – 2 1/2″ Flange, 2DSO800F – 3″ Flange, 2DSO1000F – 4″ Flange, 2DSO1500F – 6″ Flange 2-Way, Normally Open Pilot Piston Process Valve
2R130-3/8 – 3/8″ NPT, 2R150-1/2 – 1/2″ NPT, 2R200-3/4 – 3/4″ NPT, 2R250-1 – 1″ NPT, 2R320-11/4 – 1 1/4″ NPT, 2R400-11/2 – 1 1/2″ NPT, 2R500-2 – 2″ NPT 2-Way, Normally Closed Pilot Diaphragm Process Valve
2RS130-3/8 – 3/8″ NPT, 2RS150-1/2 – 1/2″ NPT, 2RS200-3/4 – 3/4″ NPT, 2RS250-1 – 1″ NPT, 2RS320-11/4 – 1 1/4″ NPT, 2RS400-11/2 – 1 1/2″ NPT, 2RS500-2 – 2″ NPT 2-Way, Normally Closed Pilot Diaphragm Process Valve
2R130-3/8 – 3/8″ NPT, 2RO150-1/2 – 1/2″ NPT, 2RO200-3/4 – 3/4″ NPT, 2RO250-1 – 1″ NPT, 2RO320-11/4 – 1 1/4″ NPT, 2RO400-11/2 – 1 1/2″ NPT, 2RO500-2 – 2″ NPT 2-Way, Normally Open Pilot Diaphragm Process Valve
2RSO130-3/8 – 3/8″ NPT, 2RSO150-1/2 – 1/2″ NPT, 2RSO200-3/4 – 3/4″ NPT, 2RSO250-1 – 1″ NPT, 2RSO320-11/4 – 1 1/4″ NPT, 2RSO400-11/2 – 1 1/2″ NPT, 2RSO500-2 – 2″ NPT 2-Way, Normally Open Pilot Diaphragm Process Valve
200C Coil
200C
Voltage:
1 = 12VDC
2 = 24VDC2A = 24VAC
3 = 110VAC
4 = 220VAC (50/60Hz)
Electrical Connection: D = DIN (with LED indicator and conduit connector)
Power Rating: 3W, 4.8W, 6.5W
For 2P, 2V, 3V, and 4V 200-400 Series Solenoid Valves
Insulation: F Class, IP65
Duty Cycle: 100% ED
CE Certification
Installed with 12″ Wires
DIN 43650B
200C
Voltage:
1 = 12VDC
2 = 24VDC2A = 24VAC
3 = 110VAC
4 = 220VAC (50/60Hz)
Electrical Connection: G = Grommet
Power Rating: 3W, 4.8W, 6.5W
For 2P, 2V, 3V, and 4V 200-400 Series Solenoid Valves
Insulation: F Class, IP65
Duty Cycle: 100% ED
CE Certification
10″ Lead Wires
200C Coil Accessories
200C-DIN-AC
Electrical Connection: D = DIN
For 200C DIN VAC Coil
LED Indicator and Strain Relief Connector, DIN 43650B
200C-DIN-DC
Electrical Connection: D = DIN
For 200C DIN VDC Coil
LED Indicator and Strain Relief Connector, DIN 43650B
200C-DIN N1/2
Electrical Connection: D = DIN
For 200C DIN Coil
200C DIN Coil Conduit Connector with 1/2″ NPT Connector,DIN 43650B
200C-DIN 2M-LED
Electrical Connection: D = DIN
For 200C DIN Coil
200C DIN Coil Connector with 2 meter cable, DIN 43650B
200C-DIN-12-24D-S
Voltage: For 12-24 VAC/VDC Coil
Electrical Connection: D = DIN
For 200C DIN Coil
DIN Connector for 200C DIN Coil (12-24 VAC/VDC) with LED Indicator & MOV Suppression, DIN 43650B
200C-DIN-110D-S
Voltage: For 110-120 VAC Coil
Electrical Connection: D = DIN
For 200C DIN Coil
DIN Connector for 200C DIN Coil (110-120VAC) with LED Indicator & MOV Suppression, DIN 43650B
2W200C Coil
2W200C
Voltage:
1 = 12VDC
2 = 24VDC2A = 24VAC
3 = 110VAC
4 = 220VAC (50/60Hz)
Electrical Connection: D = DIN (with conduit connector)
Power Rating: 12W, 14W, 20W
For 2S/2W025-250, 3S/3W020-035 Series Solenoid Valves with DIN and 5/16″ Strain Relief Connection
Insulation: H Class, IP65
Duty Cycle: 100% ED
DIN 43650A
2W200C Coil Accessories
2W200C-DIN-AC or DC
Voltage: AC or DC Versions Available
Electrical Connection: D = DIN
For 2W200C Coil
DIN Housing with strain relief connector, LED Indicator, DIN 43650A
2W200C-DIN-AC-DC
Electrical Connection: D = DIN
For 2W200C Coil
AC to DC Converter – DIN Housing with LED Indicator, Strain Relief Connector, DIN 43650A
2W200C-DIN N1/2
Electrical Connection: D = DIN
For 2W200C Coil
DIN Housing with 1/2″ NPT Connector, DIN 43650A
2W250C-DIN-1/2M
Electrical Connection: D = DIN
For 2W200C Coil
Molded DIN Housing with 0.5 Meter 3*0.75mm2 PVC Cable Connector, DIN 43650A
2W250C-DIN-1M
Electrical Connection: D = DIN
For 2W200C Coil
Molded DIN Housing with 1 Meter 3*0.75mm2 PVC Cable Connector, DIN 43650A
2W250C-DIN-2M
Electrical Connection: D = DIN
For 2W200C Coil
Molded DIN Housing with 2 Meter 3*0.75mm2 PVC Cable Connector, DIN 43650A
Other Coils
2WO250C
Voltage:
1 = 12VDC
2 = 24VDC2A = 24VAC
3 = 110VAC
4 = 220VAC (50/60Hz)
Electrical Connection: D = DIN (with conduit connector)
Power Rating: 25-30W
For 2LS120-200, 2MS/2MSO120-500, 2P/2PO160-260, 2S/2W350-500, 2SO/2WO160-260 Series Solenoid Valves with DIN and 5/16″ Strain Relief Connection
Insulation: H Class, IP65
Duty Cycle: 100% ED
DIN 43650A
2W350C
Voltage:
1 = 12VDC
2 = 24VDC2A = 24VAC
3 = 110VAC
4 = 220VAC (50/60Hz)
Electrical Connection: D = DIN (with conduit connector)
Power Rating: 25-40W
For 2L170-300, 2LS250-500, 2SO/2WO350-500 Series Solenoid Valves with DIN and 5/16″ Strain Relief Connection
Insulation: H Class, IP65
Duty Cycle: 100% ED
DIN 43650A
Explosion Proof Coils
200C
Voltage:
1-E = 12VDC
2-E = 24VDC3-E = 110VAC
4-E = 220VAC (50/60Hz)
Electrical Connection: 1/2″ NPT conduit connection & 24″ Three-Strand Wires
ATEX Explosion Proof Coil for Models: 2P025, 2V025, 2S012-020, 3S012, 2V130-250, 3V110-410, 4V110-410
(Valve Body is Not Included)
IP65, Class F Insulation, 100% Duty Cycle
DC = 4.5W (12VDC) / 4.6W (24VDC); AC = 6.8VA
1/2″ NPT Conduit Connection with 24″ Three-Strand Wires
RoHS CompliantCSA 202633 Certificate Specifications:
Class I, Div 1, Groups A, B, C, & D
Class I, Div 2, Groups A, B, C, & D
Class II, Groups E, F, & G; Class IIIFM 3006713 Certificate Specifications:
Class I, Div 1, Groups A, B, C, D, T4, Ta = 60°C
Encapsulation/Exp. Class I, Zone 1, AEx m II T4, Ta = 60°C
Dust-Ignition Class II/III, Div 1, Groups E, F, & G, T4, Ta = 60°C
Nonincendive Class I, Div 2, Groups A, B, C, D, T4, Ta = 60°C
Suitable for Class II, II, Div 2, Groups E, F, G, T4, Ta = 60°C
200C
1-ATEX = 12VDC
2-ATEX = 24VDC2A-ATEX = 24VAC
3-ATEX = 110VAC
4-ATEX = 220VAC (50/60Hz)
Electrical Connection: DIN 43650B Connection with 10ft 3-Wired Cable & Sleeve
ATEX Explosion Proof Coil for Models: 2P025, 2V025, 2S012-020, 3S012, 2V130-250, 3V110-410, 4V110-410
(Valve Body is Not Included)
ATEX Explosion Proof Coil
Ex II 2 G Ex mb IIC T4Gb
Ex 2 D EX mb tb IIIC T130°C Db
IP65, Class F Insulation, 100% Duty Cycle
Max. Media Temp. 176°F (180°C)
Ambient Temp: -4 to 122°F (-20 to 50°C)
RoHS Compliant
2W200C
Voltage:
1-ATEX = 12VDC
2-ATEX = 24VDC
2A-ATEX = 24VAC
3-ATEX = 110VAC
4-ATEX = 220VAC
Electrical Connection: DIN 43650A Connection with 10ft 3-Wired Cable & Sleeve
ATEX Explosion Proof Coil for Models: 2P050, 2S025-050, 3S020-035, 2S160-250, 2W160-250, 2R130-500, 2RS130-500, 2RSO130-500, 2RO130-500
(Valve Body is Not Included)
ATEX Explosion Proof Coil
Ex II 2 G Ex mb II T4 Gb
Ex II 2 D EX tb IIIC T130°C Db
IP65, Class F Insulation, 100% Duty Cycle
Max. Media Temp. 176°F (180°C)
Ambient Temp: -4 to 122°F (-20 to 50°C)
RoHS Compliant
To connect DIN coil:
- Remove the Philip screw from the plastic housing and unplug it from the DIN coil.
- From the screw opening, use the screw to push the terminal block out of the plastic housing.
- Note the 1, 2, and ground markings on the underside of the DIN enclosure.
- For DC DIN coil, connect 1 to Positive, 2 to Negative.
- For AC DIN coil, connect 1 to HOT wire, 2 to Neutral wire, and if required, connect ground to ground wire.
To connect Grommet coil:
- For DC Coil, connect one of the two wires to Positive, and the other wire to Negative.
- For AC Coil, connect one of the two wires to HOT wire, and the other wire to Neutral wire.
Digital Timers
2W200C-T On/Off Timer Switch
Voltage: 24-240VDC or AC 50/60Hz, 1A
Electrical Connection: DIN43650A Connection
For 2W200C, 2W350C, 2WO Coils
On/Off Adjustment Duration:
On 0.5 seconds to 10 seconds,
Off 30 seconds to 45 minutes
2W200C-T-D Digital On/Off Timer Switch
Voltage: 24-240V DC or AC 50/60 HZ, 1A
Electrical Connection: Termination: DIN43650A
For 2W200C, 2W350C, 2WO Coils
On/Off Adjustment Duration:
On 0.5 seconds to 10 seconds,
Off 30 seconds to 45 minutes.
Size: 88 x 48 x 21 (mm)
Protection: IP 65, EN60529
2W200C-T-DH Programmable Digital On/Off Timer Switch
Voltage: 110-220VAC 50/60HZ, 1A
Electrical Connection: Termination: DIN43650A
For 2W200C, 2W350C, 2WO Coils
On/Off Single or Multi Cycles Adjustment Duration:
On 1 second to 99 seconds,
Off 1 second to 99 hours.
Size: 88 x 48 x 21 (mm)
Protection: IP65, EN0529
2W200C-T-DL Programmable Digital On/Off Timer Switch
Voltage: 7-36V DC or AC, 3A
Electrical Connection: Termination: DIN43650A
For 2W200C, 2W350C, 2WO Coils
On/Off Single or Multi Cycles Adjustment Duration:
On 1 second to 99 seconds,
Off 1 second to 99 hours.
Size: 88 x 48 x 21 (mm)
Protection: IP65, EN0529
2W200C-PS-H Power Save Device
Voltage: 100-280VAC 50/60HZ, 1A
Electrical Connection: Termination: DIN43650A
For 2W200C, 2W350C, 2WO Coils
High Power Start Up Time: 0.3 – 2.5 seconds
Energy Save Rate: 15 to 85%
Power Up Grade: 20 to 300% (AC Only)
Size: 88 x 48 x 21 (mm)
Protection: IP65, EN60529
2W200C-PS-L Power Save Device
Voltage: 12-36V DC or AC, 2A
Electrical Connection: Termination: DIN43650A
For 2W200C, 2W350C, 2WO Coils
High Power Start Up Time: 0.3 – 2.5 seconds
Energy Save Rate: 15 to 85%
Power Up Grade: 20 to 300% (AC Only)
Size: 88 x 48 x 21 (mm)
Protection: IP65, EN60529
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