AirTAC 2KS400 2/2-Way Stainless Solenoid Valve, Normally Open, 1 1/2" Port
Every stocked AirTAC 2KS400 configuration on one page: 10 order codes covering 5 coil voltages, from $362.88. Pick the port, voltage and electrical entry to see the exact order code and price.
PT1 1/2
This combination is not a stock order code. Request a quote and we will confirm availability and price.
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the AirTAC 2KS400
The AirTAC 2KS400 is a normally open 2/2-way solenoid valve for air, water and oil, with 1 1/2" ports and a Ø40.0 mm orifice (Cv 31.00). It is internally piloted: the line pressure helps move the piston, which gives a large flow from a small coil, so it needs at least 0.05 MPa across the valve to switch. The valve is open with the coil off and closes while the coil is energised.
The body is SUS304 stainless steel with FKM (FPM-F) seals. It handles media up to 20 cSt, proof pressure 1.5 MPa. The coil is rated IP65 with class B insulation and comes with a DIN connector or a 0.5 m lead wire.
2KS400 Technical Specifications
| Model | 2KS400 |
|---|---|
| Function | 2/2-way, normally open |
| Operation | Internally piloted |
| Port | PT1 1/2 |
| Orifice | Ø40.0 mm |
| Cv / effective area | 31.00 / 560.0 mm² |
| Body / seal | SUS304 stainless steel / FKM (FPM-F) |
| Weight | 3260 g (DIN connector; lead wire 20 g less) |
| Media | Air, water and oil |
|---|---|
| Viscosity | 20 cSt or less |
| Operating pressure difference | 0.05 – 0.7 MPa (10 – 100 psi) |
| Proof pressure | 1.5 MPa (220 psi) |
| Temperature | Water +1 to +80 °C, air -20 to +90 °C (dew point -20 °C or lower), oil -10 to +80 °C, ambient -20 to +70 °C |
| Coil | CDA170 / CLA170 |
| Coil power | AC 35.0 VA (50 Hz) / 30.0 VA (60 Hz) · DC 12.0 W |
| Voltage tolerance | AC ±15%, DC ±10% |
| Insulation / protection | Class B / IP65 |
Source: AirTAC catalog P195, 2KS series specifications and ordering code.
How the 2KS400 Order Code Is Built
| 2KS | 2/2-way normally open solenoid valve |
|---|---|
| 400 | Nominal bore Ø40 mm |
| 40 | Port: 40 = 1 1/2" |
| A / B / C / E / F | Voltage: A AC220V, B DC24V, C AC110V, E AC24V, F DC12V |
| I | Lead wire 0.5 m (blank = DIN connector) |
| G / T | Thread: G = G (BSPP), T = NPT, blank = PT |
All AirTAC 2KS400 Order Codes (10)
Each order code links to its own datasheet page. Use Select to load it into the configurator above.
| Order code | Port | Voltage | Entry | Price | Select |
|---|---|---|---|---|---|
| 2KS40040B | PT1 1/2 | DC24V (B) | DIN connector | $362.88 | |
| 2KS40040BI | PT1 1/2 | DC24V (B) | Lead wire 0.5 m (I) | $362.88 | |
| 2KS40040A | PT1 1/2 | AC220V (A) | DIN connector | $362.88 | |
| 2KS40040AI | PT1 1/2 | AC220V (A) | Lead wire 0.5 m (I) | $362.88 | |
| 2KS40040C | PT1 1/2 | AC110V (C) | DIN connector | $362.88 | |
| 2KS40040CI | PT1 1/2 | AC110V (C) | Lead wire 0.5 m (I) | $362.88 | |
| 2KS40040E | PT1 1/2 | AC24V (E) | DIN connector | $362.88 | |
| 2KS40040EI | PT1 1/2 | AC24V (E) | Lead wire 0.5 m (I) | $362.88 | |
| 2KS40040F | PT1 1/2 | DC12V (F) | DIN connector | $362.88 | |
| 2KS40040FI | PT1 1/2 | DC12V (F) | Lead wire 0.5 m (I) | $362.88 |
Need a combination that is not listed? Request a quote.
Where the 2KS400 Is Used
Water lines
Switches water supplies for cooling, washing and rinsing.
Air and gas shut-off
Opens and closes compressed air or inert gas lines.
Light oil
Handles oils up to 20 cSt.
Choosing the Right 2KS400 Configuration
The port is 1 1/2"; PT is standard.
Choose the coil voltage to match your control circuit: DC24V (B), AC220V (A), AC110V (C), AC24V (E), DC12V (F). Supply tolerance is AC ±15% and DC ±10%.
For the electrical entry, the standard DIN connector takes your own cable; the I version has a 0.5 m lead wire already attached.
The 2KS is normally open: the valve is open with the coil off and closes while the coil is energised. For a normally closed valve use the 2S.
Pilot-operated sizes need at least 0.05 MPa pressure difference to switch; for lines that may run at zero pressure, use a direct-acting 2KS030 or 2KS050.
Sizes 320, 400 and 500 have no mounting bracket accessory.
AirTAC 2KS400 FAQ
Normally open. The valve is open with the coil off and closes while the coil is energised.
Air, water and oil up to 20 cSt. Water +1 to +80 °C, air -20 to +90 °C (dew point -20 °C or lower), oil -10 to +80 °C, ambient -20 to +70 °C. For media not listed in the catalog, check with us first.
It works at a pressure difference of 0.05 – 0.7 MPa (10 – 100 psi); proof pressure 1.5 MPa. As a pilot-operated valve it needs at least 0.05 MPa to switch.
DC24V (B), AC220V (A), AC110V (C), AC24V (E), DC12V (F). The letter after the port size gives the voltage.
Orifices, pressure ratings and coils are the same; the 2KS has a SUS304 stainless steel body for corrosive surroundings, the 2KW a brass body. Pilot-operated 2KS valves also come in 320, 400 and 500 sizes; the 2KW stops at 250.
No. You can order a single piece. Orders are processed and handed to the carrier within 3-5 business days.
Buying the 2KS400 from AirtacDistr
Genuine AirTAC parts
Every order code on this page is the AirTAC factory part number. Specifications follow the AirTAC Products Catalog 2026A. About us
Ready in 3-5 business days
That is our time to process the order and hand it to the carrier. No minimum order: a single piece can be ordered.
14-day returns, 1-year warranty
Return within 14 days of delivery; the buyer pays return shipping. The warranty covers defects not caused by misuse. Return policy
Engineering help
Send your application details and we will confirm the right order code, usually within 7-8 hours. Ask us
Page data checked against the live catalog on 2026-11-11.
Request a Quote for the 2KS400
Send the order code, quantity and destination. We confirm price, stock and lead time, usually within 7-8 hours.