Proportional pressure regulator QKL-B3-A

for airgasPID

QKL-B3 is the high flow version (7 bar) with an extra volume booster for higher flow and dynamic working conditions. It offers high accuracy (1%), high repeatability, and a flow rate of 1200 L/min. Used in large closed tank applications, semiconductor testing equipment, dry-process equipment, and manufacturing equipment. and dynamic flow such as laser cutting application. QKL-B3-A is the economic high flow version for simple pressure regulation applications. Features quick pressure switch time, high flow, and cost-effectiveness. Major application: low pressure gas control in laser cutting machines. Working Principle An electronically controlled pressure regulator consists of a high-speed processing electronic board, air pressure transducer, one normally closed solenoid valve for air inlet, and one for air exhaust. Upon receiving an electronic signal (0-10V, 4-20mA, or digital) from the controller, it commands the solenoid valve to open for air inlet. The built-in transducer senses pressure and converts it to a digital signal. The electronics compare the set signal with the output pressure and operate the inlet or exhaust valve accordingly, using a PID loop until the set signal equals the output pressure. Advantage / Benefits Due to its high resolution, the low pressure electronically controlled pressure regulator is used in combination with: - Air pressure ratio regulator: Amplifies output pressure in ratio with the dome pressure regulator (typically 20:1). Used for stable high pressure control up to 210 bar (3000 psig). - Volume booster: Pairing with a high precision volume booster (1/2" ~ 2") allows accurate control of ultra-high flow rates while maintaining fine air pressure control. Used in blow molding/blowing processes. - Steam pressure / water pressure dome pressure regulator: Electronic control is critical in food and tire manufacturing industries. - Back Pressure Regulator: Can be piloted by the electronic regulator for back pressure or forward flow rate control. Features quick response and stable set value pressure. FAQ 1. If I intend to output 0.1 psi of air, what is the maximum inlet air pressure to the regulator? A. Set inlet air pressure regulator as close to the output air pressure for high resolution control. 2. Can I achieve a resolution control such as 0.3 psi change with volume booster? A. It is not possible. 3. I need a low flow rate 4 bar electronic pressure regulator, but there is a slight flow rate from the container, would QKL-B1T be suitable? A. If the flow rate is below 4 L/min, it would be possible Features - Small Size - High Precision - High Sensitivity - Wide Pressure Range Industrial application - Laser Cutter - Leak Tester - Tension Control - PET bottle molding machine - Multi-Stage Pressure Control Specifications Type: B3-A (economic type) Input Signal: 0-10V / 4-20mA / RS485 Output Range: 0-2bar (29psi), 0-4bar (58psi), 0-8bar (116psi), 0-7bar (102psi) *Suggesting Supply Pressure Max: 3bar (43psi), 5bar (73psi), 9bar (131psi), 8bar (116psi) Monitor Output: 1-5V / 0-10V / 4-20mA / RS485 Power Supply: DC24V (≦4W) Response: 0.8S Medium: Clean compressed air or with 5 µm filter Repeatability:±1% F.S. Hysteresis: ±1% F.S. Linearity: ±1% F.S. Accuracy: ±1% F.S. Flow Rate: 940L/min @7bar Temp. Range(Operating): 0-70 ⁰C (32-158 ⁰F) Port Size: G1/4" Manifold Material: Aluminum Wetted Materials: Aluminum, Stainless steel, NBR Mounting Bracket Material: Galvanized Steel Electrical Connection: M12 Connector (2m) Ingress Protection: IP 65 Life Cycle: Over 1 Billion Times Weight: 440 g