United Kingdom 0800 488 488 | Intl +44 (0) 161 777 6611 | Welcome to our new website, found an issue or bug? Please report it here
Series-SW1
Electric to Pneumatic Fail-Safe Solenoid Valve
- Electric control for pneumatic actuators: The SW1 provides electric-to-pneumatic switching for pneumatic actuator applications.
- Ideal for HVAC retrofits: Helps modern electric controls interface with existing pneumatic dampers, valves, and actuators.
- Simplifies legacy integration: Supports continued use of pneumatic equipment while adding electric control capability.
- Useful for BAS control projects: Applies to building automation upgrades where pneumatic field devices remain in service.
- ACI pneumatic accessory: WorkACI lists SW1 as an electric to pneumatic switch for direct pneumatic actuator control.
Product Overview
- Approvals RoHS2, WEEE
- Contact Fail-Safe With failsafe
- Control Valve 1 Valve
- Electrical Connection Screw Terminal
- Height 1.5 in
- Length 1.68 in
- Materials PVC
- Operating Temperature, Max 120 °F
- Operating Temperature, Min -10 °F
- Series ID Series-SW1
- Storage Temperature, Max 150 °F
- Storage Temperature, Min -10 °F
- Supply Current 95 mA
- Supply Pressure, Max 35 psi
- Supply Voltage 24 Vac/Vdc
- Tightening Torque 0.5 Nm (Minimum); 0.6 Nm (Maximum)
- Tube Size 5/32 in OD x 1/8 in ID
- Weight 0.22 lb
- Width 3.25 in
- Wire Gauge 26 to 16 AWG
Supported Applications
The ACI Series SW1 is an electric to pneumatic fail-safe solenoid valve designed as a three-way device activated by a 24 VDC or VAC electric signal. The series serves applications including pneumatic actuators, use as fail-safe control, electrical to pneumatic switching (ON/OFF), and integration into pneumatic logic circuits.
Operating Conditions & Performance
The Series SW1 operates within an ambient temperature range of -10 to 150°F (-23 to 65.56°C) with a storage temperature rating of -10 to 150°F (-23.3 to 65.5°C). The unit functions in humidity levels from 5 to 95% non condensing. Pneumatic performance is rated for a maximum supply pressure of 35 psig (241 kPa), with output pressure matching the supply. Air flow rate is specified at 1200 scim @ 20 psig (19.67 slpm). Electrical requirements are met by a power supply of 24 VAC or 24 VDC, +/- 10%, drawing a maximum current of 95 mA for AC and 47 mA for DC.
Physical Specifications
- Housing Material: Polyvinyl Chloride (PVC) Snaptrack with UL94 V-0 flammability rating.
- Pneumatic Connections: 5/32" O.D. (1/8" I.D.) Polyethylene or PVC Tubing via two plastic barbs and one metal barb.
- Electrical Connection: 90° Pluggable Screw Terminal Blocks accepting wire sizes from 16 AWG (1.31 mm²) to 26 AWG (0.129 mm²).
- Torque Rating: 0.5 Nm (Minimum); 0.6 Nm (Maximum).
- Dimensions: Product dimensions are (L) 1.68" (W) 3.25" (H) 1.50" (42.54 x 82.55 x 38.10 mm). Board-only width is 1.67" (42.54mm); Snap Track depth is .70" (17.78mm).
- Weight: 0.22 lbs. (0.099 Kg).
Safety and Approvals
The Series SW1 carries RoHS2 and WEEE approvals. An LED indicator provides visual confirmation of power to the valve.
Configuration Options
The series supports continuous duty operation and includes a jumper shunt mounted in series with incoming power to allow local OFF override. The miniature design is lightweight and energy efficient. Available options include:
- A/DO008 (Item # 142583): Transient Voltage Suppressor, Bi-directional, 56 VAC/DC, 1500W.
- A/DRC 1.8 X 3.25 (Item # 142627): DIN Rail Adapter Kit.
- ENC1 (Item # 102472): 20 Gauge Metal Enclosure, Designed to Hold Interfaces Products.
Installation Notes
The series documentation specifies that power must be removed before wiring. When using shielded cable, the shield should be grounded only at the controller end to prevent ground loops. For 24 VAC operation, an isolated UL-listed class 2 transformer is recommended. If sharing power with inductive loads such as relays or solenoids, a Transient Voltage Suppressor (e.g., ACI Part: 142583) must be placed across the coil to prevent voltage spikes.
Key Product Differences
The Series SW1 is offered in a standard configuration identified by Model # SW1 and Item # 127752, described as "Electric to Pneumatic Fail-Safe." The product overview notes the valve accepts polyethylene or PVC tubing via its barb connections. No other model variations are enumerated within the series data sheet.
