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**Economic Brush 12V Air Pump**
**Model NO.:** TM40-B
**Pressure:** 250kPa
**Trademark:** TOPSFLO
**Transport Package:** Standard Export Packing or OEM Packing
**Specification:** CE, IEC, RoHS
**Origin:** China
TOPSFLO’s micro diaphragm pumps and compressors are designed based on a simple yet effective principle. The rotational power from the motor is converted into oscillating motion by an eccentric mechanism, which moves up and down its central point. This movement is then transferred to a diaphragm via a connecting rod, creating a pumping action through an elastic diaphragm and inlet/outlet valves.
The TM40 Series offers multiple configurations, making it suitable for vacuum, pressure, or alternating operations. Its compact and innovative design ensures high performance, quiet operation, long lifespan, and reliability. These pumps can be mounted in any position and deliver up to **13 L/min (dual head)** depending on the model, with a maximum operating pressure of **250 kPa**.
This pump is ideal for various industrial and commercial applications such as portable analytical instruments, medical diagnostic equipment, air quality sampling, respiration monitoring, and gas or odor leak detection.
**Key Features:**
- **Highest Performance/Size Ratio:** Compact and lightweight, yet powerful.
- **Quieter Operation:** Optimized flow paths and chamber design reduce noise without sacrificing performance.
- **Reliable Longevity:** High-quality bearings and brushless motor technology ensure extended service life.
- **Oil-Free Operation:** No contamination of the media being pumped.
- **Low Vibration:** Ensures stable and smooth performance.
- **Excellent Gas Tightness:** Advanced diaphragm and valve designs for superior sealing.
- **Chemical Resistance:** Optional materials like PTFE and FKM allow for pumping of corrosive gases.
- **Customizable Options:** Wide range of materials, voltages, and motor types available for different application needs.
**Technical Specifications:**
| Model | Pressure Pump (Item Number) | Vacuum Pump (Item Number) | Rated Voltage (Vdc) | No-load Current (A) | Max Pressure (kPa) | Max Vacuum (kPa) | Max Flow (L/min) |
|-------|-----------------------------|---------------------------|---------------------|----------------------|--------------------|-------------------|------------------|
| TM40-B | TM40-B12-P25013 | TM40-B12-V7513 | 12 | 0.8 | 250 | -75 | 13 |
| TM40-B | TM40-B12-P22011 | TM40-B12-V7011 | 12 | 0.6 | 220 | -70 | 11 |
*Note: "P" stands for pressure pump, "V" for vacuum pump, and "12/24" indicates optional voltages.*
**Dimensions & Weight:**
- Pump Weight: 280g
- Pump Size: 88mm x 65mm x 40.5mm
- Inlet/Outlet: OD 6.5mm / ID 3.4mm (Recommended Hose ID: 5.0mm)
- Materials: Pump Head – PPE, Membrane – EPDM, Valve – EPDM
- Motor Type: "B" denotes economical brush DC motor (lifetime ≥1,000 hours)
**Applications:**
- Industrial pressure and vacuum systems
- Portable analytical devices
- Medical diagnostic tools
- Air quality monitoring
- Respiration monitoring
- Gas and odor leak detection
**Product Images:**
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Whether you need a reliable and efficient air pump for industrial use or a compact solution for specialized equipment, the TM40-B series is a versatile and durable choice. Its combination of performance, durability, and adaptability makes it a top option for a wide range of applications.