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Description
QKL-B1TR/QKL-B4HR is ultra high resolution electro-pneumatic proportional pressure control valves provides a step control of ±0.005% F.S., ideal for very sensitive applications. This series is a complete closed loop servo system consisting of two solenoid valves, an internal pressure transducer, and electronic controls.
A bleed orifice of 0.1mm (M5 exhaust) comes with this series. Based on input signal, the pressure is controlled by two solenoid valves and the bleed to maintain precise pressure; one valve functions as inlet control, the other as exhaust, and a constant bleed. This series features fast and high resolution pressure change. The pressure output is measured by an internal feedback pressure transducer that provides a feedback signal to the electronic controls. There are 3 selections of input signal and monitor signal: 0-10VDC, 4-20mA or RS485 ModBus.
All our products have CE, SGS, RoHS certification with ISO13485 quality system.
Features
- Compact
- High Precision
- High Sensitivity
- Wide Pressure Range
Applications
- Leak Testing At Low Pressure
- Microfluidics Flow Control
- Dispensing
- Multi-Stage Pressure Control
Specifications
| Type | QKL-B1TR | QKL-B4HR |
|---|---|---|
| Output Range | 2 / 5 / 10 bar ( 29 / 72 / 145 psig) | |
| Supply Pressure Max | 11.5 bar (165 psi) | |
| Input Signal | 0-10V / 4-20mA / RS485 | |
| Monitor Output | 0-10V / 4-20mA / RS485 | |
| Supply | DC24V (≦3W) | DC24V (≦5W) |
| Medium | Clean compressed air or with 5 µm filter | |
| Repeatability | ±0.02% F.S. | ±0.05% F.S. |
| Resolution (max) | ±0.005% F.S. | ±0.01% F.S. |
| Accuracy | ±0.1% F.S. | ±0.1% F.S. |
| Hysteresis | ±0.01% F.S. | ±0.1% F.S. |
| Flow Rate | 2.5L/min @ 1bar (orifice: 0.45mm) | 3L/min @ 1bar (orifice: 0.5mm) 120L/min@1bar(orifice: 3.0mm) |
| Temp. Range (Operating) | 0 ~ 70 ⁰C ( 32 ~ 158 ⁰F) | |
| Port Size | 1/8" PT | |
| Manifold Material | Aluminum | |
| Wetted Materials | Aluminum, Stainless steel, Brass, FKM | |
| Electrical Connection | M12 Connector (2m) | |
| Ingress Protection | IP 65 | |